GELE Exam Flashcards

Q: Which GELE table of specifications does this set follow?

It follows the PRC 2025 Enhanced Tables of Specifications, approved for the October 2025 GELE and subsequent examination schedules.

Q: How is the current official GELE blueprint organized?

The table assigns 20% subject weight to each of Laws, Rules and Regulations; Mathematics; Theory and Practice in Surveying; Geodesy; and Cartography. Its subject-item total is 395.

Q: Why are there only 50 cards when the official table lists 395 items?

The 50-card allocation is editorial: 10 cards per official subject. It is a review aid, not a copy of the examination or a prediction of item wording.

Q: What score is required to pass the GELE?

Republic Act No. 8560 requires a weighted general average of at least 70%, with no subject grade below 55%.

Q: What happens after a third unsuccessful GELE attempt?

Under Section 17 of Republic Act No. 8560, a candidate may take the next examination only after one year from the last examination taken.

Q: How is the 2026 GELE scheduled?

The PRC 2026 schedule lists Geodetic Engineers as a two-day Computer-Based Licensure Examination on September 23-24, 2026.

Question 1

GELE practice scope under Republic Act No. 8560

Accepted Answer

The statute covers mathematics; surveying practice; property, cadastral, mining, geodetic, engineering, and construction surveys; cartography and photogrammetry; geodesy; and specified land, resource, property, and professional-law topics.

Question 2

Board of Geodetic Engineering versus the PRC

Accepted Answer

The Professional Regulatory Board of Geodetic Engineering regulates the profession within the PRC framework; the PRC administers the national licensure system and examination processes.

Question 3

GELE passing standard

Accepted Answer

A candidate needs a weighted general average of at least 70% and must not receive a grade below 55% in any subject.

Question 4

A 70% overall GELE average with one subject below 55%

Accepted Answer

The candidate must re-examine only in the subject or subjects below 55%; the overall average alone does not satisfy the statutory passing rule.

Question 5

Re-examination interval after a third GELE failure

Accepted Answer

Republic Act No. 8560 requires a one-year interval from the last examination before the next attempt.

Question 6

Regalian Doctrine in land-law review

Accepted Answer

It is the principle that lands and natural resources belong to the State unless a recognized legal basis establishes private ownership or a lawful grant.

Question 7

A public-land surveyor's first legal question

Accepted Answer

Determine the land classification and the authority under which a disposition, survey, or occupation is claimed before treating the parcel as privately alienable land.

Question 8

Purpose of a cadastral survey in land registration

Accepted Answer

It identifies and relates parcel boundaries, corner monuments, areas, and adjoining claims so that land parcels can be located and described for registration and administration.

Question 9

Professional responsibility for signed and sealed survey plans

Accepted Answer

A registered geodetic engineer who prepares or supervises the work signs and seals the plan and is professionally accountable for that work.

Question 10

Ethical response to survey evidence outside an engineer's competence

Accepted Answer

Do not represent unverified work as competent professional work; obtain qualified assistance or decline the task while protecting the client's and public's interests.

Question 11

Residual and correction in an adjusted observation

Accepted Answer

If residual v equals observed minus adjusted, the correction equals adjusted minus observed, or -v.

Question 12

Weighted mean of observations

Accepted Answer

Compute it as the sum of each observation times its weight divided by the sum of the weights. Higher weight gives an observation more influence.

Question 13

Least-squares adjustment objective

Accepted Answer

It selects adjusted values that minimize the sum of weighted squared residuals while satisfying the applicable observation equations or constraints.

Question 14

Variance versus standard deviation

Accepted Answer

Variance is the average squared dispersion in the relevant model; standard deviation is its square root and is expressed in the observation's units.

Question 15

Plane-coordinate distance between two points

Accepted Answer

Use the Pythagorean relation: square root of the squared easting difference plus the squared northing difference.

Question 16

Derivative and integral in a surveying calculation

Accepted Answer

A derivative describes an instantaneous rate of change or slope; an integral accumulates a quantity, such as area under a curve or a change derived from a rate.

Question 17

When to use the law of sines in a survey triangle

Accepted Answer

Use it when a known side-angle pair and another angle or side relate opposite sides and angles; each side divided by the sine of its opposite angle is constant.

Question 18

When to use the law of cosines in a survey triangle

Accepted Answer

Use it to solve a side from two sides and their included angle, or an angle from all three sides; it generalizes the Pythagorean theorem.

Question 19

Static equilibrium check for a surveying support or structure

Accepted Answer

For planar equilibrium, the sums of forces in each coordinate direction and the sum of moments must each be zero.

Question 20

Present worth of a future amount

Accepted Answer

For a future amount F after n periods at rate i, present worth is F divided by (1 + i) to the nth power.

Question 21

Latitude and departure of a traverse line

Accepted Answer

Latitude is the north-south component and departure is the east-west component of the line, computed from its distance and direction.

Question 22

Linear error of closure

Accepted Answer

It is the magnitude of the vector formed by the traverse's unbalanced latitude and departure after summing the measured lines.

Question 23

Relative precision of a closed traverse

Accepted Answer

Express it as total traverse length divided by linear error of closure, commonly stated as 1:n. A larger n indicates a smaller closure error relative to length.

Question 24

Bowditch rule

Accepted Answer

It distributes a traverse's latitude and departure misclosure to each course in proportion to that course's length when angles and distances have comparable precision.

Question 25

Height-of-instrument leveling relationship

Accepted Answer

Height of instrument equals a known point elevation plus its backsight; an observed point elevation equals height of instrument minus its foresight or intermediate sight.

Question 26

Tangent length of a simple circular curve

Accepted Answer

For radius R and intersection angle Delta, tangent length T equals R times tan(Delta divided by 2).

Question 27

Control survey versus detail survey

Accepted Answer

A control survey establishes an accurate reference framework; a detail survey locates features relative to that framework for mapping, design, or documentation.

Question 28

Topographic, hydrographic, and cadastral survey distinction

Accepted Answer

Topographic work maps terrain and surface features; hydrographic work measures water bodies and submerged features; cadastral work identifies parcel boundaries and land interests.

Question 29

Random error versus systematic error

Accepted Answer

Random error varies unpredictably among observations and is reduced by repetition and adjustment; systematic error has a consistent cause and requires calibration, modeling, or correction.

Question 30

Purpose of a field-book check before adjustment

Accepted Answer

It detects transcription, arithmetic, setup, and identification errors before mathematical adjustment masks them as ordinary observation residuals.

Question 31

Geodetic datum

Accepted Answer

It is a defined reference system, including a reference ellipsoid and its position and orientation, used to express geographic or geocentric coordinates consistently.

Question 32

Geodetic latitude versus geocentric latitude

Accepted Answer

Geodetic latitude is the angle between the ellipsoid normal and the equatorial plane; geocentric latitude is the angle between the Earth's center-to-point radius and that plane.

Question 33

Geoid, ellipsoid, and GNSS height

Accepted Answer

The ellipsoid is a mathematical reference surface, while the geoid approximates a gravity-related mean-sea-level surface. Ellipsoidal height h, orthometric height H, and geoid undulation N relate as H = h - N.

Question 34

Grid convergence

Accepted Answer

It is the angular difference between grid north and geodetic north at a location, so a grid bearing or azimuth may need a convergence correction when related to geodetic directions.

Question 35

GNSS pseudorange versus carrier-phase observation

Accepted Answer

Pseudorange is code-based and gives meter-level raw range information; carrier phase measures the signal's phase with much higher precision but requires resolving integer ambiguities.

Question 36

GNSS almanac versus ephemeris

Accepted Answer

An almanac provides coarse orbital and status information for the constellation; an ephemeris gives precise, time-specific orbit information for an individual satellite.

Question 37

GNSS multipath

Accepted Answer

It occurs when reflected signals reach the antenna in addition to the direct signal, biasing code and carrier observations. Good site selection and antenna practices help reduce it.

Question 38

Static GNSS surveying versus RTK

Accepted Answer

Static surveying uses longer simultaneous observations and later processing for high-accuracy baselines; RTK uses real-time corrections to provide centimeter-level positions when conditions and ambiguities permit.

Question 39

Triangulation, trilateration, and traversing

Accepted Answer

Triangulation primarily derives positions from measured angles, trilateration from measured distances, and traversing from connected measured lengths and directions or angles.

Question 40

Horizontal control and vertical control

Accepted Answer

Horizontal control establishes plan position coordinates; vertical control establishes elevations or height differences. A network adjustment evaluates their observations together under their respective models.

Question 41

Map projection selection

Accepted Answer

Choose a projection according to the map's purpose, area, orientation, extent, and the property that must be best preserved, such as shape, area, distance, or direction.

Question 42

Conformal versus equal-area projection

Accepted Answer

A conformal projection preserves local angles and shapes but distorts area; an equal-area projection preserves relative area but generally distorts local shapes or angles.

Question 43

Coordinate transformation before combining mapped data

Accepted Answer

Identify each dataset's datum, projection, coordinate reference system, units, and transformation parameters; convert through an appropriate documented transformation before overlaying or measuring.

Question 44

Representative fraction map scale

Accepted Answer

A scale of 1:N means one unit on the map represents N of the same units on the ground. A smaller denominator is a larger-scale, more detailed map.

Question 45

Essential evidence on an isolated survey plan

Accepted Answer

The plotted plan must communicate the parcel geometry and survey basis clearly, including identifiable corners and boundary lines, measurements or coordinates, scale, north reference, and the responsible professional's required certification.

Question 46

Vector data versus raster data in GIS

Accepted Answer

Vector data represents discrete points, lines, and polygons with coordinates and attributes; raster data stores values in a grid of cells, useful for imagery and continuous surfaces.

Question 47

Spatial attribute versus nonspatial attribute in GIS

Accepted Answer

Spatial attributes describe location or geometry; nonspatial attributes describe associated facts, such as a parcel identifier, land use, owner field, or survey date.

Question 48

Chart datum in hydrographic plotting

Accepted Answer

It is the stated vertical reference for reported depths or soundings. Using the correct datum lets mariners and map users interpret water depths consistently.

Question 49

Approximate vertical aerial-photo scale

Accepted Answer

For a near-vertical photograph over relatively level terrain, scale is approximately camera focal length divided by flying height above the ground.

Question 50

Ground control's role in an orthophoto or drone map

Accepted Answer

Well-distributed, accurately surveyed ground control anchors the imagery to the target coordinate system and supports checking positional accuracy after processing.

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