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GELE Cadastral Surveys & Land LawsCadastral and Isolated SurveysExam Answer Templates

How to answer Cadastral and Isolated Surveys questions on the GELE — a set of templates you can apply to any question Professional Regulation Commission (PRC) — Board of Geodetic Engineering throws at you in the Cadastral Surveys & Land Laws subtest. Built from analysis of recent GELE 2026 papers.

Exam context

Professional Regulation Commission (PRC) — Board of Geodetic Engineering runs the Geodetic Engineer Licensure Examination on September 2026. Its Cadastral Surveys & Land Laws section sits under a "Core" weighting, and Cadastral and Isolated Surveys is the 1st chapter in the 5-chapter GELE Cadastral Surveys & Land Laws rotation. The GELE passing mark is 70% weighted average, no sub-test below 50%, and the most recent 2026 paper drew about a meaningful share of questions from Cadastral Surveys & Land Laws.

Cadastral and Isolated Surveys - Exam Answer Templates

Proper answer writing is the single most controllable factor in your PRC board exam score. A correct idea poorly expressed earns zero; a well-structured, terminologically precise answer earns full marks even if slightly incomplete. These templates show you the exact format, key phrases, and scoring logic examiners use when marking Cadastral Surveys & Land Laws questions. Study the model answers as writing blueprints—not just knowledge checks—and practice replicating the structure under timed conditions. Pay particular attention to legal citations (RA 4374, RA 8560, PD 1529, CA 141), agency names (DENR-LMB), datum references (PRS92), and technical terms (BLLM, tie line, cadastral case)—these are the phrases that convert partial credit into full marks.

Templates

Define cadastral survey. (1 mark)

Marks

1

Topic

Types of Land Survey

Difficulty

easy

Template Id

T1

Examiner Tip

The word 'systematic' is the key differentiator from an isolated survey. Include it and you virtually guarantee the mark.

Model Answer

A cadastral survey is a systematic survey of all land parcels within a municipality or city to fix boundaries, assign lot numbers, and support land registration under the Torrens system.

Question Type

very_short_answer

Answer Structure

  • Single sentence: state it is systematic, covers all parcels, states purpose (boundary fixing and land registration).

Scoring Breakdown

Marks

1

Criteria

Correctly identifies 'systematic survey of all parcels within a municipality/city' AND at least one purpose (boundary determination or land registration).

Common Mark Deductions

  • Writing only 'survey of land' without 'systematic' or 'all parcels'—too vague, no mark.
  • Confusing cadastral survey with isolated survey (single lot).
  • Omitting the purpose (boundary fixing or land registration).

Key Phrases To Include

  • systematic survey
  • all parcels
  • municipality/city
  • boundaries
  • land registration / Torrens system

What is an isolated (individual) survey? (1 mark)

Marks

1

Topic

Types of Land Survey

Difficulty

easy

Template Id

T2

Examiner Tip

The phrase 'single parcel' is the minimum for the mark. Adding 'tied to geodetic control' shows depth and protects against partial credit disputes.

Model Answer

An isolated survey is the survey of a single land parcel—for titling, transfer, or development—tied to existing cadastral or geodetic control.

Question Type

very_short_answer

Answer Structure

  • Single sentence: 'single parcel,' state one valid purpose, mention tie to control.

Scoring Breakdown

Marks

1

Criteria

Correctly identifies 'single parcel/lot' AND at least one purpose (titling, transfer, development, relocation).

Common Mark Deductions

  • Describing it as covering multiple parcels.
  • Failing to distinguish it from a cadastral survey.
  • Omitting the tie to control (which is the essential technical requirement).

Key Phrases To Include

  • single parcel / one lot
  • titling / transfer / development
  • tied to geodetic control

What does BLLM stand for and what is its function in land surveys? (1 mark)

Marks

1

Topic

Monumentation and Tie

Difficulty

easy

Template Id

T3

Examiner Tip

Even if you cannot recall the exact expansion, a correct functional description ('permanent geodetic control monument for tying parcel corners') may still earn the mark in some rubrics.

Model Answer

BLLM stands for Bureau of Lands Location Monument. It is a permanent geodetic control monument used as the reference point to which parcel corners are tied, giving parcels absolute coordinates on the PRS92 datum.

Question Type

very_short_answer

Answer Structure

  • Part A: Expand the acronym.
  • Part B: State its function (geodetic control reference/tie point).

Scoring Breakdown

Marks

1

Criteria

Correct expansion of BLLM AND correct function as a geodetic control/tie monument.

Common Mark Deductions

  • Expanding BLLM incorrectly (e.g., 'Bureau of Land and Lot Marking').
  • Describing it as merely a corner monument without the control/reference function.
  • Omitting that it provides absolute (not relative) coordinates.

Key Phrases To Include

  • Bureau of Lands Location Monument
  • geodetic control
  • tie point
  • absolute coordinates
  • PRS92

Name the government agency that approves and records cadastral and land surveys in the Philippines. (1 mark)

Marks

1

Topic

Cadastral Survey Essentials

Difficulty

easy

Template Id

T4

Examiner Tip

Always write the full name first, then the acronym in parentheses. If you write only 'DENR,' you may lose the mark since DENR has multiple bureaus.

Model Answer

The Department of Environment and Natural Resources – Land Management Bureau (DENR-LMB) and its regional offices approve and record cadastral and land surveys in the Philippines.

Question Type

very_short_answer

Answer Structure

  • Single answer: DENR-LMB (full name) and mention of regional offices.

Scoring Breakdown

Marks

1

Criteria

Correctly names DENR-LMB (Department of Environment and Natural Resources – Land Management Bureau) as the approving authority.

Common Mark Deductions

  • Writing 'DPWH' or 'NAMRIA' as the approving authority for land surveys.
  • Writing only 'Bureau of Lands' without noting its current placement under DENR-LMB.
  • Omitting 'LMB' and writing only 'DENR' without the bureau specification.

Key Phrases To Include

  • DENR
  • Land Management Bureau
  • LMB
  • regional offices

Distinguish between a cadastral survey and an isolated survey. (2 marks)

Marks

2

Topic

Types of Land Survey

Difficulty

easy

Template Id

T5

Examiner Tip

Structure your answer as two clearly labelled sentences or short paragraphs—one per survey type. This makes it easy for the examiner to award each mark independently.

Model Answer

A cadastral survey is a systematic, government-initiated survey of all land parcels within a municipality or city, assigning lot numbers within cadastral cases and producing cadastral maps for mass land registration. An isolated (individual) survey, on the other hand, covers only a single parcel—commissioned by the landowner for titling, transfer, or development—and must be tied to existing cadastral or geodetic control (BLLM) on the PRS92 datum.

Question Type

short_answer

Answer Structure

  • Sentence 1: Define cadastral survey—systematic, all parcels, government-initiated, outputs cadastral map. [1 mark]
  • Sentence 2: Define isolated survey—single parcel, owner-commissioned, tied to control. [1 mark]

Scoring Breakdown

Marks

1

Criteria

Accurate description of cadastral survey highlighting 'systematic,' 'all parcels,' and 'municipality/city' scope.

Marks

1

Criteria

Accurate description of isolated survey highlighting 'single parcel,' 'owner-initiated,' and 'tied to geodetic control.'

Common Mark Deductions

  • Treating both as equivalent without identifying the scope difference.
  • Not mentioning the control tie for isolated surveys.
  • Confusing the initiating party (government vs. landowner).

Key Phrases To Include

  • systematic
  • all parcels
  • municipality/city
  • cadastral case/map
  • single parcel
  • owner-commissioned
  • tied to geodetic control / BLLM
  • PRS92

What is a tie line in cadastral surveying, and why is it essential? (2 marks)

Marks

2

Topic

Monumentation and Tie

Difficulty

medium

Template Id

T6

Examiner Tip

The word 'absolute' is the key conceptual mark—contrast it with 'relative' geometry to show you understand the geodetic principle.

Model Answer

A tie line is a measured traverse line connecting a parcel corner to the nearest geodetic control monument (BLLM), recording its bearing and horizontal distance. It is essential because it gives the parcel absolute coordinates on the national datum (PRS92), ensuring the lot fits correctly within the cadastral map, adjoining parcels have no gaps or overlaps, and the corners can be accurately relocated in the future.

Question Type

short_answer

Answer Structure

  • Sentence 1: Define tie line—measured line from parcel corner to BLLM, bearing and distance. [1 mark]
  • Sentence 2: State why essential—absolute coordinates on PRS92, consistency with adjoining lots, future relocation. [1 mark]

Scoring Breakdown

Marks

1

Criteria

Correct definition: line connecting parcel corner to a known geodetic monument (BLLM), specifying bearing and distance.

Marks

1

Criteria

Correct explanation of purpose: absolute coordinates on national datum, prevents gaps/overlaps, enables relocation.

Common Mark Deductions

  • Describing a tie line as merely 'a line between two corners'—fails to mention control monument.
  • Not explaining why absolute coordinates matter (the 'essential' part).
  • Omitting the datum reference (PRS92).

Key Phrases To Include

  • tie line
  • parcel corner
  • BLLM / geodetic control monument
  • bearing and distance
  • absolute coordinates
  • PRS92 / national datum
  • gaps or overlaps
  • relocation

How is a parcel identified in the Philippine cadastral system? (2 marks)

Marks

2

Topic

Cadastral Survey Essentials

Difficulty

easy

Template Id

T7

Examiner Tip

Write an example identifier (e.g., 'Lot 5, Block 2, Cad-462') to make the abstract concept concrete—examiners appreciate demonstrated application.

Model Answer

A parcel in the Philippine cadastral system is identified by its lot number within a cadastral block and cadastral case number (e.g., Lot 5, Block 2, Cad-462, Caloocan City). The parcel is further described by a technical description that states its area, the bearings and distances of each boundary line, and the coordinates of its monumented corners referenced to PRS92.

Question Type

short_answer

Answer Structure

  • Part 1: Lot number, block number, cadastral case number—with example. [1 mark]
  • Part 2: Technical description—area, bearings, distances, coordinates on PRS92. [1 mark]

Scoring Breakdown

Marks

1

Criteria

Correctly states lot number, block number, and cadastral case number as identifiers, with a plausible example format.

Marks

1

Criteria

Mentions technical description: area, bearings, distances, and coordinate reference to PRS92.

Common Mark Deductions

  • Citing only the lot number without the block or cadastral case.
  • Omitting the technical description component.
  • Not referencing PRS92 as the coordinate datum.

Key Phrases To Include

  • lot number
  • block number
  • cadastral case number
  • technical description
  • bearings and distances
  • PRS92
  • monumented corners

Explain why parcel corners in an isolated survey must be tied to a BLLM rather than surveyed in isolation. (3 marks)

Marks

3

Topic

Monumentation and Tie

Difficulty

medium

Template Id

T8

Examiner Tip

Number your reasons (First, Second, Third) or use bullet points—this signals to the examiner that you know three distinct points are needed and prevents them from inadvertently counting one reason twice.

Model Answer

Parcel corners must be tied to a BLLM (Bureau of Lands Location Monument) for three critical reasons. First, a tie gives the parcel absolute coordinates on the national datum (PRS92), placing it precisely within the national coordinate reference framework rather than in a local, arbitrary coordinate system. Second, absolute positioning ensures the parcel fits correctly on the cadastral map alongside adjoining lots, preventing gaps, overlaps, or duplicate occupation of the same ground area. Third, monumented corners tied to a national control network can be accurately relocated years or decades later—even if the physical markers are disturbed or destroyed—by re-occupying the BLLM and retracing the tie traverse, thereby protecting the landowner's title under PD 1529 (Property Registration Decree).

Question Type

short_answer

Answer Structure

  • Reason 1: Absolute coordinates on PRS92—not local/arbitrary. [1 mark]
  • Reason 2: Consistency with cadastral map, prevents gaps/overlaps with adjoining lots. [1 mark]
  • Reason 3: Reliable future relocation; legal protection under PD 1529. [1 mark]

Scoring Breakdown

Marks

1

Criteria

States that a tie provides absolute coordinates on the national datum (PRS92), distinguishing from a local/floating coordinate system.

Marks

1

Criteria

Explains that absolute positioning ensures the parcel integrates correctly with the cadastral map and adjoins other lots without gaps or overlaps.

Marks

1

Criteria

Explains that tied corners can be relocated in future and cites legal protection context (PD 1529 or Torrens system).

Common Mark Deductions

  • Giving only one reason when three are required.
  • Using vague language ('for accuracy') without specifying what accuracy enables.
  • Not mentioning PRS92 as the datum.
  • Not linking the tie to legal protection or the Torrens system.

Key Phrases To Include

  • BLLM
  • absolute coordinates
  • PRS92 / national datum
  • cadastral map
  • gaps or overlaps
  • relocation
  • PD 1529 / Torrens system
  • arbitrary / floating coordinate system

Describe the output documents of a cadastral survey and explain how they support the Torrens land registration system. (3 marks)

Marks

3

Topic

Cadastral Survey Essentials

Difficulty

medium

Template Id

T9

Examiner Tip

Examiners for the 'link to Torrens' mark are looking for the word 'indefeasible' or a direct reference to PD 1529 or LRA. Include at least one of these to secure the third mark.

Model Answer

A completed cadastral survey produces three primary output documents: (1) the cadastral map, which shows all surveyed parcels with their lot numbers, block numbers, boundaries, and control monuments plotted to scale; (2) the lot data sheets (technical descriptions), which state the area, bearings, distances, and PRS92 coordinates of each parcel's corners; and (3) the survey returns or field notes, which record all field measurements. These outputs support the Torrens registration system (governed by PD 1529 – Property Registration Decree) because cadastral data establish the precise, unambiguous boundaries of each parcel, enabling the courts and the Land Registration Authority (LRA) to issue Original Certificates of Title (OCT) that are indefeasible and conclusive against the whole world, thereby preventing future boundary disputes.

Question Type

short_answer

Answer Structure

  • Point 1: Cadastral map—parcels, lot numbers, boundaries plotted to scale. [1 mark]
  • Point 2: Lot data sheets / technical descriptions—area, bearings, distances, PRS92 coordinates. [1 mark]
  • Point 3: Link to Torrens system (PD 1529, LRA, OCT, indefeasibility). [1 mark]

Scoring Breakdown

Marks

1

Criteria

Correctly names and describes the cadastral map as a primary output showing all parcels with lot numbers and boundaries.

Marks

1

Criteria

Correctly names lot data sheets/technical descriptions with their contents (area, bearings, distances, coordinates).

Marks

1

Criteria

Correctly links cadastral survey outputs to the Torrens registration system, citing PD 1529 or LRA and indefeasibility of title.

Common Mark Deductions

  • Listing only the cadastral map without the technical descriptions.
  • Not linking the survey outputs to the Torrens/PD 1529 framework.
  • Using 'certificate' without specifying OCT or the indefeasibility concept.

Key Phrases To Include

  • cadastral map
  • lot data sheets / technical description
  • survey returns / field notes
  • PRS92 coordinates
  • Torrens system
  • PD 1529
  • Land Registration Authority
  • Original Certificate of Title (OCT)
  • indefeasible

What are the common types of land surveys in the Philippines? Briefly describe each type. (3 marks)

Marks

3

Topic

Types of Land Survey

Difficulty

medium

Template Id

T10

Examiner Tip

Use numbered or bulleted lists for enumeration questions—this ensures the examiner can count your points at a glance and you don't inadvertently blend two answers into one.

Model Answer

The common types of land surveys in the Philippines are: (1) Cadastral survey — a systematic survey of all parcels in a municipality or city, conducted or approved by DENR-LMB, to establish boundaries and support mass land registration. (2) Isolated (individual) survey — a survey of a single parcel commissioned by a landowner for titling, transfer, subdivision, or development, tied to cadastral/geodetic control on PRS92. (3) Public land survey — a survey of unregistered public lands administered by the State under CA 141 (Commonwealth Act 141, Public Land Act) prior to disposition through homestead, free patent, or sales patent. Other types include mineral surveys (for mining claims), and relocation or verification surveys (to re-establish lost corners).

Question Type

short_answer

Answer Structure

  • Type 1: Cadastral survey—systematic, all parcels, DENR-LMB, mass registration. [1 mark]
  • Type 2: Isolated survey—single parcel, owner-commissioned, tied to control. [1 mark]
  • Type 3: Public land survey—unregistered public land, CA 141, homestead/patent. (Credit also given for mineral survey or relocation survey.) [1 mark]

Scoring Breakdown

Marks

1

Criteria

Correct description of cadastral survey.

Marks

1

Criteria

Correct description of isolated survey.

Marks

1

Criteria

Correct description of at least one other type (public land, mineral, or relocation survey) with a relevant detail.

Common Mark Deductions

  • Describing only two types for a 3-mark question.
  • Conflating public land survey with cadastral survey.
  • Failing to cite CA 141 for public land surveys.

Key Phrases To Include

  • cadastral survey
  • isolated/individual survey
  • public land survey
  • CA 141
  • DENR-LMB
  • homestead/free patent/sales patent
  • mineral survey
  • relocation survey

A landowner in Quezon City wants the boundary of his 500 m² titled lot resurveyed to verify encroachment by a neighbor. (a) What type of survey is required? (b) What monument should the surveyor tie to? (c) What datum must be used? (5 marks)

Marks

5

Topic

Types of Land Survey / Monumentation and Tie

Difficulty

hard

Template Id

T11

Examiner Tip

For case-study questions, answer each lettered sub-part in sequence with a clear label (a), (b), (c). This prevents the examiner from missing any part and ensures you receive credit for each section independently.

Model Answer

(a) Survey Type: An isolated relocation survey (also called a verification or relocation survey) of the single parcel is required. A full cadastral survey is not appropriate because only one lot—not all parcels in the locality—is being re-established. The survey must comply with DENR-LMB technical standards and the Geodetic Engineers of the Philippines Code of Ethics under RA 8560. (b) Control Monument to Tie To: The geodetic engineer must run a tie traverse from at least one corner of the lot to the nearest Bureau of Lands Location Monument (BLLM) or other approved geodetic control monument in the cadastral network of Quezon City. The tie line bearing and horizontal distance must be recorded in the survey returns and plotted on the survey plan. (c) Datum: The Philippine Reference System of 1992 (PRS92) is the official national geodetic horizontal datum, defined by the GRS80 ellipsoid. All computed coordinates of the parcel corners must be referenced to PRS92, and if PPCS/UTM coordinates are reported, the correct zone for Quezon City is Zone III (central meridian 121°00'E). Summary: Isolated relocation survey → tie to nearest BLLM → reference all coordinates to PRS92 (PPCS Zone III for Metro Manila).

Question Type

case_study

Answer Structure

  • Part (a): Name the survey type correctly—isolated relocation survey, not cadastral. Cite RA 8560. [1–2 marks]
  • Part (b): Identify BLLM as the control monument; describe the tie traverse procedure. [1–2 marks]
  • Part (c): Name PRS92 as the datum; specify PPCS/UTM Zone III for Metro Manila. [1 mark]

Scoring Breakdown

Marks

2

Criteria

Correctly identifies isolated relocation survey; explains why a cadastral survey is inappropriate (single lot vs. all parcels); mentions DENR-LMB standards or RA 8560.

Marks

2

Criteria

Correctly identifies BLLM as the tie monument; describes tie traverse (bearing and distance from parcel corner to BLLM); notes recording in survey returns.

Marks

1

Criteria

Correctly states PRS92 as the official datum; mentions PPCS/UTM Zone III for Quezon City/Metro Manila.

Common Mark Deductions

  • Saying 'cadastral survey' instead of 'isolated relocation survey.'
  • Not identifying BLLM as the specific monument type.
  • Omitting PRS92 datum or citing WGS84 as the Philippine datum (WGS84 ≠ PRS92, though they differ by <1 m).
  • Not specifying PPCS Zone III for Metro Manila.
  • Omitting the legal citation (RA 8560 or DENR order).

Key Phrases To Include

  • isolated relocation survey
  • single parcel / one lot
  • cadastral survey not appropriate
  • DENR-LMB
  • RA 8560
  • BLLM
  • tie traverse
  • bearing and horizontal distance
  • survey returns
  • PRS92
  • PPCS/UTM Zone III
  • central meridian 121°00'E

Describe the complete procedure for conducting an isolated survey of a private lot from field work to DENR-LMB approval. (5 marks)

Marks

5

Topic

Cadastral Survey Essentials / Isolated Survey

Difficulty

hard

Template Id

T12

Examiner Tip

Use numbered stages and bold headings (e.g., '1. Pre-field Preparation:') for 5-mark procedure questions. Examiners award one mark per stage—if stages are not clearly delineated, you risk getting credit for only two or three stages even if all five are present in the prose.

Model Answer

The isolated survey procedure consists of five main stages: 1. Pre-field Preparation: The geodetic engineer reviews the lot's title (OCT/TCT) and approved plan, locates the nearest cadastral control data (BLLM coordinates, cadastral map) from the DENR-LMB regional office, and secures a survey authority or order from DENR-LMB as required under RA 8560 and DENR Memorandum Circulars. 2. Field Survey — Control Recovery and Tie: The engineer occupies the nearest BLLM, verifies its integrity, and runs a closed traverse (tie traverse) from the BLLM to an established corner of the lot, recording horizontal angles and distances. All traverse data are adjusted (e.g., by the Bowditch/Compass Rule) and the computed closure error must not exceed the allowable limit for the lot's classification. 3. Field Survey — Lot Boundary Survey: From the established tie point, the engineer surveys the perimeter of the lot (all corners), recording bearings and horizontal distances between consecutive corners. Natural and artificial boundary markers are noted. Missing corner monuments are set based on the approved plan. 4. Office Computation: The traverse is computed in PRS92 coordinates (PPCS/UTM Zone as applicable). The lot area is computed (by DMD, coordinate, or digital method) and compared to the title area. The technical description (bearing-distance-coordinate table) and survey plan are drafted, showing the tie line to the BLLM. 5. Submission and DENR-LMB Approval: The geodetic engineer signs and seals the survey plan and technical description, and submits the complete survey returns (field notes, computations, plan) to the DENR-LMB Regional Office. The LMB checks compliance with technical standards, approves the survey, and assigns a survey number. The approved plan then supports the landowner's application to the LRA/Register of Deeds for title registration or annotation under PD 1529.

Question Type

long_answer

Answer Structure

  • Stage 1: Pre-field preparation—title review, BLLM data retrieval, survey authority. [1 mark]
  • Stage 2: Field — control recovery, tie traverse from BLLM, adjustment. [1 mark]
  • Stage 3: Field — perimeter survey, bearing-distance of all corners. [1 mark]
  • Stage 4: Office computation — PRS92 coordinates, area, technical description, plan. [1 mark]
  • Stage 5: Submission to DENR-LMB, approval, link to PD 1529/LRA. [1 mark]

Scoring Breakdown

Marks

1

Criteria

Pre-field preparation described: title review, BLLM data retrieval, survey authority/order from DENR-LMB.

Marks

1

Criteria

Control recovery and tie traverse correctly described: occupation of BLLM, closed traverse, adjustment within allowable closure.

Marks

1

Criteria

Perimeter boundary survey described: bearing and distance of all lot corners, setting of monuments.

Marks

1

Criteria

Office computations described: PRS92 coordinate computation, area computation, technical description and survey plan drafted.

Marks

1

Criteria

Submission to DENR-LMB for approval described; link to PD 1529/LRA for title registration mentioned.

Common Mark Deductions

  • Omitting the pre-field stage (many students jump straight to field work).
  • Not mentioning the tie to BLLM.
  • Not mentioning traverse adjustment or allowable closure.
  • Failing to mention DENR-LMB approval and the link to PD 1529.
  • Writing vague stages without technical content.

Key Phrases To Include

  • survey authority / survey order
  • DENR-LMB regional office
  • BLLM
  • tie traverse
  • closure adjustment / Bowditch Rule
  • allowable closure
  • bearings and distances
  • PRS92 / PPCS/UTM
  • area computation
  • technical description
  • survey plan
  • survey returns
  • RA 8560
  • PD 1529
  • LRA / Register of Deeds

A lot survey yields the following corner coordinates in PRS92 (Zone III). Compute the area of the lot using the Coordinate Method. Corner | Northing N (m) | Easting E (m) A | 1 650 200.00 | 300 100.00 B | 1 650 200.00 | 300 250.00 C | 1 650 100.00 | 300 250.00 D | 1 650 100.00 | 300 100.00 (5 marks)

Marks

5

Topic

Cadastral Survey Essentials / Area Computation

Difficulty

hard

Template Id

T13

Examiner Tip

For numerical problems, always write the formula before substituting numbers. If your arithmetic produces an error, the examiner can still award the formula mark and the setup mark. A wrong final answer with correct method can still earn 3 of 5 marks.

Model Answer

Given: Four corners A, B, C, D (closed rectangular lot) with PRS92 Zone III coordinates. Step 1 — Arrange corners in sequence (A → B → C → D → A) and list coordinates: A: N = 1 650 200.00 m, E = 300 100.00 m B: N = 1 650 200.00 m, E = 300 250.00 m C: N = 1 650 100.00 m, E = 300 250.00 m D: N = 1 650 100.00 m, E = 300 100.00 m Step 2 — Apply the Coordinate (Shoelace / Gauss's Area) Formula: 2A = |Σ(Ni × Ei+1) − Σ(Ni+1 × Ei)| Compute forward products (N_i × E_{i+1}): N_A × E_B = 1 650 200.00 × 300 250.00 = 495 412 550 000.00 N_B × E_C = 1 650 200.00 × 300 250.00 = 495 412 550 000.00 N_C × E_D = 1 650 100.00 × 300 100.00 = 495 195 010 000.00 N_D × E_A = 1 650 100.00 × 300 100.00 = 495 195 010 000.00 Σ Forward = 1 981 215 120 000.00 Compute backward products (N_{i+1} × E_i): N_B × E_A = 1 650 200.00 × 300 100.00 = 495 165 020 000.00 N_C × E_B = 1 650 100.00 × 300 250.00 = 495 247 525 000.00 N_D × E_C = 1 650 100.00 × 300 250.00 = 495 247 525 000.00 N_A × E_D = 1 650 200.00 × 300 100.00 = 495 165 020 000.00 Σ Backward = 1 980 825 090 000.00 2A = |1 981 215 120 000.00 − 1 980 825 090 000.00| = 390 030 000.00 A = 390 030 000.00 / 2 = 15 000.00 m² Verification (simple rectangle): Side AB = 300 250 − 300 100 = 150 m; Side AD = 1 650 200 − 1 650 100 = 100 m; Area = 150 × 100 = 15 000 m² ✓ Final Answer: Area = 15 000 m² = 1.5000 ha

Question Type

numerical

Answer Structure

  • Step 1: List given coordinates in tabular form, close the polygon back to starting point. [1 mark]
  • Step 2: State the Shoelace/Coordinate formula clearly. [1 mark]
  • Step 3: Compute forward products (Ni × Ei+1), sum them. [1 mark]
  • Step 4: Compute backward products (Ni+1 × Ei), sum them. [1 mark]
  • Step 5: Apply formula, compute 2A, divide by 2, state final area in m² and ha. [1 mark]

Scoring Breakdown

Marks

1

Criteria

Correctly sets up the coordinate table with all four corners and the closing return to the first corner.

Marks

1

Criteria

Correctly states the Coordinate/Shoelace formula: 2A = |Σ(Ni × Ei+1) − Σ(Ni+1 × Ei)|.

Marks

1

Criteria

Correctly computes all forward diagonal products.

Marks

1

Criteria

Correctly computes all backward diagonal products.

Marks

1

Criteria

Correct final area = 15 000 m² (or 1.5 ha), with correct application of the ½ factor.

Common Mark Deductions

  • Forgetting to close the polygon back to corner A (omitting the last two products).
  • Not dividing 2A by 2 to get A.
  • Arithmetic error in large-number multiplication—show all intermediate steps to earn partial credit.
  • Not converting m² to hectares when the problem implies a final area report.
  • Omitting the formula statement—loses the formula mark even if the answer is correct.

Key Phrases To Include

  • Coordinate Method / Shoelace Formula
  • 2A = |Σ(Ni × Ei+1) − Σ(Ni+1 × Ei)|
  • forward products
  • backward products
  • PRS92 Zone III
  • 15 000 m²
  • 1.5000 ha

Cite and briefly explain two Philippine laws that directly govern land surveys and land registration. (2 marks)

Marks

2

Topic

Legal Framework

Difficulty

medium

Template Id

T14

Examiner Tip

Always state the number, the popular name, the year, and one key provision. This four-element structure ensures you cover all possible mark criteria for a legal-citation question.

Model Answer

1. PD 1529 — Property Registration Decree (1978): Governs the Torrens system of land registration in the Philippines. It provides for the registration of land titles through the Land Registration Authority (LRA) and the Register of Deeds, making registered titles indefeasible (cannot be collaterally attacked) upon issuance of the Certificate of Title. Cadastral and isolated survey plans must be approved before title registration can proceed under this decree. 2. RA 8560 — Philippine Geodetic Engineering Act of 1998: Defines and regulates the practice of geodetic engineering (which includes all land surveys). It establishes that only licensed geodetic engineers may sign and seal survey plans, technical descriptions, and other survey documents submitted to DENR-LMB or the LRA. It also created the Board of Geodetic Engineering under the PRC.

Question Type

short_answer

Answer Structure

  • Law 1: PD 1529—name, year, key provision relevant to land surveys. [1 mark]
  • Law 2: RA 8560—name, year, key provision relevant to land surveys and geodetic engineers. [1 mark]

Scoring Breakdown

Marks

1

Criteria

Correctly cites PD 1529 (Property Registration Decree) with a correct key provision (Torrens system, indefeasible title, LRA/Register of Deeds).

Marks

1

Criteria

Correctly cites RA 8560 (Philippine Geodetic Engineering Act) with a correct key provision (practice of geodetic engineering, signing/sealing of survey plans, PRC Board).

Common Mark Deductions

  • Citing CA 141 instead of PD 1529 (CA 141 governs public land disposition, not title registration).
  • Citing RA 4374 without explaining its relevance (it is the earlier Geodetic Engineers Act, superseded by RA 8560).
  • Naming the law correctly but providing no relevant provision—no mark for citation alone.
  • Confusing LRA with DENR-LMB.

Key Phrases To Include

  • PD 1529
  • Property Registration Decree
  • Torrens system
  • indefeasible title
  • LRA / Land Registration Authority
  • RA 8560
  • Philippine Geodetic Engineering Act
  • licensed geodetic engineer
  • sign and seal
  • PRC Board of Geodetic Engineering

What is the role of the Geodetic Engineer in a cadastral survey, as defined under RA 8560? (3 marks)

Marks

3

Topic

Legal Framework / Professional Practice

Difficulty

medium

Template Id

T15

Examiner Tip

When asked about a professional's 'role under a specific law,' the examiner expects at least: (1) what the professional is authorized/required to do, (2) the specific legal mechanism (sign and seal), and (3) the consequence of non-compliance. Cover all three for full marks.

Model Answer

Under RA 8560 (Philippine Geodetic Engineering Act of 1998), the geodetic engineer performs the following roles in a cadastral survey: 1. Technical Execution: The geodetic engineer conducts all field measurements—horizontal control traverses, monument recovery, corner setting, and tie-line surveys—using instruments and methods that conform to DENR-LMB technical standards. Only a PRC-registered geodetic engineer is legally authorized to perform and certify land surveys. 2. Professional Certification: The geodetic engineer signs, dates, and affixes the official PRC seal on the survey plan, technical description, and all survey returns. This certification attests that the survey was conducted according to law and established technical standards, and is a prerequisite for DENR-LMB approval. 3. Legal Accountability: The geodetic engineer assumes legal and professional responsibility for the accuracy and integrity of the survey. Errors, falsifications, or violations of technical standards may result in administrative, civil, or criminal liability, and can lead to suspension or revocation of the PRC license under RA 8560's penalty provisions.

Question Type

short_answer

Answer Structure

  • Role 1: Technical execution of field surveys—authorized practice, DENR-LMB standards. [1 mark]
  • Role 2: Professional certification—signing, sealing, PRC registration requirement. [1 mark]
  • Role 3: Legal accountability—professional responsibility, penalties, license revocation. [1 mark]

Scoring Breakdown

Marks

1

Criteria

States that only a PRC-registered geodetic engineer may conduct and certify land surveys under RA 8560.

Marks

1

Criteria

States that the geodetic engineer signs and seals survey documents (plan and technical description) as required for DENR-LMB approval.

Marks

1

Criteria

States that the geodetic engineer bears legal/professional accountability for survey accuracy, with potential penalties under RA 8560.

Common Mark Deductions

  • Not citing RA 8560.
  • Describing roles generically without linking to the legal authorization framework.
  • Omitting the sign-and-seal requirement.
  • Not mentioning professional accountability or penalties.

Key Phrases To Include

  • RA 8560
  • PRC-registered geodetic engineer
  • authorized practice
  • sign and seal
  • survey plan and technical description
  • DENR-LMB approval
  • legal / professional accountability
  • suspension / revocation of license

Mark Wise Strategy

Dos

  • Start with the subject of the question directly.
  • Include at least one technical keyword (e.g., 'systematic,' 'BLLM,' 'PRS92').
  • Write in complete sentence form for clarity.
  • If it is an acronym question, always expand the acronym and state its function.

Donts

  • Do not write more than 2–3 lines—excess writing wastes time and earns no extra marks.
  • Do not use vague language ('it is a kind of survey used for land').
  • Do not define the wrong term by confusing similar concepts (e.g., cadastral vs. isolated).
  • Do not leave blank—an approximation still has a chance of earning the mark.

Marks

1

Strategy

Give a single, precise sentence that contains the key term being defined or the specific fact being recalled. Do not pad the answer with introductory phrases like 'This is because...' or 'It is important to note...'—go directly to the point.

Expected Length

1–2 lines (15–30 words)

Time Allocation

1–2 minutes

Dos

  • Write two clearly separated points or sentences.
  • Include one technical law or datum reference (PRS92, PD 1529, RA 8560) to elevate the answer.
  • Give a concrete example or application where appropriate.
  • For comparison questions, use a parallel structure ('Cadastral survey... Isolated survey...').

Donts

  • Do not write one long paragraph that contains two points hidden in it—the examiner may only credit one.
  • Do not repeat the same idea in different words as two separate points.
  • Do not exceed 6 lines—this is a 2-mark item, not an essay.
  • Do not forget to address both parts of a compound question.

Marks

2

Strategy

Two marks require two distinct, independently scorable points. Use a two-sentence or two-bullet structure so the examiner can identify each point immediately. Cover both the definition/description AND a supporting detail (purpose, example, or reference).

Expected Length

3–5 lines (40–80 words)

Time Allocation

3–4 minutes

Dos

  • Use numbered points (1, 2, 3) to make the three marks clearly visible.
  • Include at least one Philippine law citation (CA 141, PD 1529, RA 8560).
  • Address 'what,' 'why,' and 'how' dimensions for explanation questions.
  • Use technical vocabulary consistently (BLLM, PRS92, PPCS/UTM, Torrens).
  • Include a brief example or application to reinforce each point.

Donts

  • Do not write only one or two points and hope for full marks.
  • Do not write a long narrative where points are impossible to separate.
  • Do not omit the law/datum references—these are mark differentiators.
  • Do not exceed 12 lines unless you are explicitly adding a diagram.

Marks

3

Strategy

Three marks require three distinct points or a more detailed explanation of one concept with an example and significance. Use numbered points or short paragraphs. At least one point should include a law reference or datum specification to demonstrate technical depth.

Expected Length

6–10 lines (80–150 words)

Time Allocation

5–7 minutes

Dos

  • Plan your answer for 1 minute before writing—outline five points.
  • Use bold labels or numbered headings for each major point.
  • Include a labelled sketch/diagram where relevant (earns clarity marks and demonstrates competence).
  • Cite at least two laws or technical standards (e.g., PD 1529 and RA 8560).
  • State units for all numerical values (m, m², ha, degrees).
  • Write a one-line summary/conclusion at the end.

Donts

  • Do not write fewer than four distinct points.
  • Do not use very small font or cramped writing to fit on fewer lines—use the space provided.
  • Do not repeat points that are essentially the same idea.
  • Do not skip showing formula steps in numerical problems—partial credit is awarded per step.
  • Do not spend more than 12 minutes on a 5-mark item at the expense of other questions.

Marks

5

Strategy

Five-mark questions demand either: (a) five clearly delineated steps/points, or (b) a detailed explanation with definition, mechanism, example, significance, and legal/technical reference. Use headings or numbered stages. Draw a simple diagram if it adds value (tie line, survey flow). Allocate 1 mark per major point.

Expected Length

15–25 lines (180–350 words) or structured with a diagram

Time Allocation

8–12 minutes

General Answer Writing Tips

  • Always define the key term in the first sentence of any concept question—examiners award the definition mark before reading further.
  • Cite the governing law or DENR regulation when answering agency/approval/legal questions (e.g., 'under RA 8560' or 'per CA 141'); a correct citation alone can earn one mark.
  • Use the exact technical vocabulary from the syllabi: 'PRS92 datum,' 'BLLM,' 'cadastral case,' 'tie line,' 'Torrens system'—vague paraphrases lose marks.
  • For distinction/comparison questions, use a two-column or parallel-sentence format so the examiner can tick each point without searching through prose.
  • In numerical problems, always state the given data, the formula, and the unit of every intermediate result before writing the final answer—partial credit is awarded per step.
  • Sketch a simple labelled diagram (lot polygon, tie-line arrow, BLLM symbol) even when not explicitly required—diagrams earn bonus clarity marks and reinforce your written answer.
  • State the approving authority explicitly: 'DENR – Land Management Bureau (LMB) and its regional offices' scores higher than 'government agency.'
  • Manage time by mark value: 1-mark items get ≤2 minutes; 5-mark items get 8–10 minutes. Never over-write a 1-mark answer or under-write a 5-mark answer.
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