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Key Facts: Engineer Surveying Geo-Spatial Information Exam

100 items

Official written exam paper length (5 subjects × 20)

Q-Net Engineer-grade testing standards; Q-Net 측량및지형공간정보기사 (jmCd 1380)

150 minutes

Written examination duration (30 minutes per subject)

Q-Net 필기시험 접수안내 (기사·산업기사 과목별 30분)

40 / 60

Passing standard: 40% individual subject floor (과락) and 60% overall average

National Technical Qualifications Act Enforcement Rules

KRW 19,400

Written exam registration fee

Q-Net 측량및지형공간정보기사 page, checked 2026-09-20

KRW 36,400

Practical exam registration fee

Q-Net 측량및지형공간정보기사 page, checked 2026-09-20

2 years

Exemption duration for written test pass

National Technical Qualifications Act Enforcement Decree Article 21

측량및지형공간정보기사 is South Korea's benchmark Engineer-grade qualification in surveying and geospatial engineering (jmCd 1380, MOLIT / HRD Korea). The official written exam comprises 100 MCQs across five subjects (20 per subject, 30 min each, 150 min total) requiring a 40% per-subject floor and 60% overall average, followed by a composite practical exam (2.5-hour written-answer + ~1 hour 10 min field practical). Official Q-Net fees are KRW 19,400 (written) and KRW 36,400 (practical). OpenExamPrep provides an independent 100-question English MCQ practice bank.

Sample Engineer Surveying Geo-Spatial Information Practice Questions

Try these sample questions to review concepts for the Engineer Surveying Geo-Spatial Information exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Under the Enforcement Decree of the Act on the Establishment, Management, etc. of Spatial Data (공간정보의 구축 및 관리 등에 관한 법률 시행령) Article 7, which pair of geometric constants defines the 세계측지계 (World Geodetic System) rotational ellipsoid used for Korean surveying?
A.Semi-major axis 6,378,137 m and flattening 1/298.257222101
B.Semi-major axis 6,377,397.155 m and flattening 1/299.1528128
C.Semi-major axis 6,378,137 m and flattening 1/298.257223563
D.Semi-major axis 6,378,206.4 m and flattening 1/294.9786982
Explanation: Presidential Decree Article 7 states that the 세계측지계 ellipsoid has a long radius (semi-major axis) of 6,378,137 m and flattening of 1/298.257222101. Those are the GRS80 constants adopted for Korean official positioning. The decree also requires the ellipsoid center to coincide with Earth's mass center and the minor axis to coincide with Earth's rotation axis.
2According to the National Geographic Information Institute (국토지리정보원) 세계측지계 technical guideline, what does Korea Geodetic Datum 2002 (한국측지계2002, KGD2002) denote?
A.A local Bessel-ellipsoid datum tied to the Tokyo Datum origin at epoch 1910.0
B.Korea's realization of the world geodetic system on ITRF2000 at epoch 2002.0 using the GRS80 ellipsoid
C.A WGS84 broadcast-ephemeris frame realized only at GNSS CORS from epoch 2010.0
D.A 2D cadastral grid that replaces geographic latitude and longitude
Explanation: NGII defines KGD2002 as the Korean portion of the world geodetic system, realized on ITRF2000 at epoch 2002.0 with the GRS80 ellipsoid. Latitude and longitude in KGD2002 are therefore geocentric geographic coordinates on GRS80, distinct from older 동경측지계 Bessel results.
3Enforcement Decree [별표 2] gives the 중부좌표계 (Central Belt) Transverse Mercator origin for 세계측지계 plane coordinates. Which parameter set is correct?
A.Longitude 127°00′ E, latitude 38°00′ N, X(N)=500,000 m, Y(E)=200,000 m, k0=0.9996
B.Longitude 129°00′ E, latitude 0°00′ N, X(N)=0 m, Y(E)=500,000 m, k0=0.9996
C.Longitude 127°00′ E, latitude 38°00′ N, X(N)=600,000 m, Y(E)=200,000 m, k0=1.0000
D.Longitude 125°00′ E, latitude 38°00′ N, X(N)=600,000 m, Y(E)=500,000 m, k0=1.0000
Explanation: 별표 2 sets the 중부좌표계 origin at 127°00′ E, 38°00′ N with false northing X(N)=600,000 m, false easting Y(E)=200,000 m, and central-meridian scale factor 1.0000, applied between 126° E and 128° E. Korean TM belts all use k0=1.0000; the 0.9996 scale factor belongs to UTM, not these belts.
4In the Korean plane rectangular system defined by 별표 2, how are the positive X and Y axes oriented?
A.X is easting (true east positive) and Y is northing (true north positive)
B.X is southing and Y is westing so that Jeju coordinates stay positive
C.X is geodetic latitude in meters and Y is longitude in meters
D.X is northing (true north positive) and Y is easting (true east positive)
Explanation: 별표 2 states that the X-axis coincides with the origin meridian and is positive toward true north, while the Y-axis is perpendicular to X and positive toward true east. Korean surveying computation sheets therefore treat X as 종선 (northing) and Y as 횡선 (easting), the reverse of the GIS/math convention that places easting on X.
5A GNSS ellipsoidal height (타원체고, h) is 52.80 m and the geoid undulation (지오이드고, N) at the point is +24.35 m. What is the orthometric height (정표고, H) using the standard relation h = H + N?
A.28.45 m
B.77.15 m
C.24.35 m
D.52.80 m
Explanation: The working relation used in Korean geodesy is h = H + N, so H = h − N = 52.80 − 24.35 = 28.45 m. Orthometric height is the height above the geoid (mean-sea-level related surface); ellipsoidal height is the height above the GRS80 ellipsoid. A positive N means the geoid lies above the ellipsoid, so H is smaller than h.
6Besides the GRS80 axis and flattening, Article 7 of the Enforcement Decree requires which geometric conditions for 세계측지계?
A.The ellipsoid is tangent to the geoid at the 대한민국 경위도원점 and the major axis lies in the equator of Bessel 1841
B.The ellipsoid center coincides with Earth's mass center, and the minor axis coincides with Earth's rotation axis
C.The ellipsoid origin is the Tokyo Datum and the minor axis points to the celestial pole of 1910
D.The ellipsoid is a sphere of radius 6,371 km with no prescribed orientation
Explanation: Article 7 requires three conditions: GRS80 a and f, coincidence of the ellipsoid center with Earth's center of mass, and coincidence of the minor axis with Earth's spin axis. Those conditions make 세계측지계 a geocentric, Earth-fixed ellipsoid rather than a locally fitted regional datum.
7Compared with GRS80, the Bessel 1841 ellipsoid used on the former Korean 동경측지계 has which semi-major axis?
A.6,378,137.000 m
B.6,378,206.400 m
C.6,377,397.155 m
D.6,356,752.314 m
Explanation: Bessel 1841, used with 동경측지계, has a = 6,377,397.155 m and f ≈ 1/299.1528128. GRS80 is about 740 m larger in equatorial radius (6,378,137 m). Korean plane coordinates computed on Bessel therefore cannot be mixed with KGD2002/GRS80 coordinates without a datum transformation.
8What is the minimum number of GNSS satellites a single receiver must track to solve a 3D point position plus receiver clock offset from pseudo-ranges?
A.3
B.5
C.6
D.4
Explanation: Each pseudo-range supplies one observation. The four unknowns are X, Y, Z and the receiver clock error dt, so at least four satellites are required. Extra satellites over-determine the solution and improve DOP and blunder detection, but four is the theoretical minimum.
9What is the carrier frequency of the GPS L1 signal used for C/A-code and L1 carrier-phase surveying?
A.1575.42 MHz
B.1227.60 MHz
C.1176.45 MHz
D.1602.00 MHz
Explanation: GPS L1 is 1575.42 MHz (154 × 10.23 MHz). L2 is 1227.60 MHz and L5 is 1176.45 MHz. Dual-frequency L1/L2 (or L1/L5) surveying uses the frequency pair to form an ionosphere-free combination.
10A GNSS session reports HDOP = 1.50 and VDOP = 2.00. What is PDOP, using PDOP = √(HDOP² + VDOP²)?
A.3.50
B.2.50
C.1.75
D.0.50
Explanation: PDOP² = HDOP² + VDOP² = 2.25 + 4.00 = 6.25, so PDOP = 2.50. PDOP compresses the 3D position dilution; GDOP would further include TDOP as √(PDOP² + TDOP²). Smaller DOP values mean stronger instantaneous satellite geometry.

About the Engineer Surveying Geo-Spatial Information Exam

Engineer Surveying Geo-Spatial Information (측량및지형공간정보기사) is South Korea's premier national technical qualification for surveying and geospatial information engineers, administered by the Human Resources Development Service of Korea (HRD Korea / Q-Net) under the Ministry of Land, Infrastructure and Transport (MOLIT). The written examination evaluates 100 four-option multiple-choice questions across five core domains: Geodesy & GNSS, Applied Surveying, Photogrammetry & Remote Sensing, Geographic Information Systems (GIS), and General Surveying. Successful written candidates proceed to a composite practical examination (복합형) consisting of a 2.5-hour written-answer examination (필답형, 60 points) testing surveying calculation and design, plus a field practical (작업형, ~1 hour 10 minutes, 40 points) assessing total station instrument setup, traverse angle/distance measurement, and precise leveling. OpenExamPrep provides an independent English-language MCQ study adaptation designed for rigorous mastery of geodetic formulas, mathematical computations, and Korean technical terminology.

Exam sponsor: HRD Korea (Q-Net) / Ministry of Land, Infrastructure and Transport (MOLIT). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

Written paper covering 측지학 및 위성측위시스템 (Geodesy & GNSS), 응용측량 (Applied Surveying), 사진측량 및 원격탐사 (Photogrammetry & Remote Sensing), 지리정보시스템 (Geographic Information Systems), and 측량학 (General Surveying) with 20 items and 30 minutes each (100 items / 150 minutes total), followed by a composite practical examination (필답형 2.5 hours + 작업형 ~1 hour 10 min, 100 points total). OpenExamPrep study weights cover all five written subjects.

Time Limit

150 minutes for the five written subjects (30 minutes each); practical: composite (2.5 hours written-answer + ~1 hour 10 min field instrument work)

Passing Score

Written: 40+ per subject (과락 floor) and 60 average; practical: 60/100

Exam / Certification Fees

KRW 19,400 written / KRW 36,400 practical (Q-Net, 2026-09-20)

Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Official sources

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

20%

Geodesy & GNSS (측지학 및 위성측위시스템)

Mathematical and physical geodesy, reference ellipsoids (GRS80 vs Bessel 1841), geoid undulation and height anomalies (h = H + N), deflection of the vertical, Korean Geodetic Datum KGD2002, Transverse Mercator (TM) projection coordinates and UTM parameters, GNSS space/control/user segments, broadcast vs precise ephemeris, pseudo-range and carrier phase equations, cycle ambiguity resolution, DOP metrics, and positioning methods (DGPS, RTK, Network-RTK VRS/FKP).

20%

Applied Surveying (응용측량)

Route alignment and horizontal circular curves (radius R, intersection angle I, tangent length T, curve length L, external distance E, middle ordinate M), deflection angle and chord layout, transition spirals (clothoid parameter A² = R·L, cubic parabola), vertical parabolic curves, underground tunnel control, shaft plumbing, gyrotheodolites, breakthrough error analysis, hydrographic sounding (single-beam/multi-beam echo sounders, acoustic velocity, tidal datum reduction), and earthwork computations (average end area, prismoidal formula, mass haul diagram).

20%

Photogrammetry & Remote Sensing (사진측량 및 원격탐사)

Aerial photogrammetry geometry, focal length, flying height, scale, forward and side overlap, relief displacement, stereoscopic parallax equations, interior orientation (fiducial marks, lens distortion), exterior orientation (6 parameters), coplanarity and collinearity conditions, bundle block aerial triangulation, digital elevation models (DEM/DSM), orthoimage generation, airborne LiDAR point clouds, electromagnetic spectrum, atmospheric scattering, spectral signatures, NDVI, and satellite image classification.

20%

Geographic Information Systems (지리정보시스템)

Vector data models and topological relationships (connectivity, directionality, containment), raster data models and spatial resolution, spatial database management systems (SDBMS), spatial indexing structures (R-tree, quadtree), metadata standards (ISO 19115), Korea National Spatial Data Infrastructure (NSDI), spatial analysis (buffer zones, vector overlays, raster map algebra, viewshed and watershed delineation, network shortest path Dijkstra), web GIS, and OGC web services (WMS, WFS, WCS).

20%

General Surveying (측량학)

Distance measurements, systematic error corrections for steel tape (temperature, sag, tension), EDM electronic distance measurement (phase comparison, pulse time-of-flight, atmospheric index correction), differential leveling, collimation error, curvature and refraction corrections (0.0675·D²), loop misclosure balancing, theodolite and total station angle observations, traverse coordinate calculations (latitude, departure, Bowditch rule), and error theory (standard deviation, variance, error propagation, weighted observations, least squares).

Preparing for the Engineer Surveying Geo-Spatial Information Exam

What You Need to Know

  • Passing score: Written: 40+ per subject (과락 floor) and 60 average; practical: 60/100
  • Assessment: Written paper covering 측지학 및 위성측위시스템 (Geodesy & GNSS), 응용측량 (Applied Surveying), 사진측량 및 원격탐사 (Photogrammetry & Remote Sensing), 지리정보시스템 (Geographic Information Systems), and 측량학 (General Surveying) with 20 items and 30 minutes each (100 items / 150 minutes total), followed by a composite practical examination (필답형 2.5 hours + 작업형 ~1 hour 10 min, 100 points total). OpenExamPrep study weights cover all five written subjects.
  • Time limit: 150 minutes for the five written subjects (30 minutes each); practical: composite (2.5 hours written-answer + ~1 hour 10 min field instrument work)
  • Exam / certification fees: KRW 19,400 written / KRW 36,400 practical (Q-Net, 2026-09-20) Official sources

Using Our Practice Resources

  • Work through all 100 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

Engineer Surveying Geo-Spatial Information: Suggested Study Strategy

1Master geodetic and curve calculations thoroughly: Topics like circular curve staking (T, L, E, M), clothoid spiral parameters (A² = R·L), earthwork prismoidal volume, and traverse Bowditch adjustments carry heavy computational weight. Practice these with your engineering calculator to complete them within the 1.5 minutes allotted per question.
2Prevent subject disqualification (과락): Candidates frequently struggle with Geodesy & GNSS (측지학 및 위성측위시스템) and Photogrammetry & Remote Sensing (사진측량 및 원격탐사) due to mathematical formulas (ellipsoid geometry, parallax, collinearity, sensor physics). Ensure you score at least 10-12 correct in these technical subjects.
3Understand coordinate systems and datums: Be clear on the differences between the historical Tokyo Datum (Bessel 1841 ellipsoid) and the modern Korean Geodetic Datum KGD2002 (GRS80 ellipsoid), the relationship between ellipsoidal height and orthometric height (h = H + N), and TM projection parameters (false easting 200,000m, false northing 600,000m, central scale factor 1.0000).
4Prepare for the practical exam alongside the written stage: The 2.5-hour written-answer practical (필답형) tests identical engineering formulas (curve layout, leveling adjustments, photogrammetric parallax, GIS overlay analysis) in free-response computational formats, while the field instrument practical (작업형) tests physical operation of the total station and leveling instruments.

Frequently Asked Questions

What is the official structure of the Engineer Surveying Geo-Spatial Information (측량및지형공간정보기사) examination?

The official qualification examination consists of two distinct stages. The first stage is a 150-minute written examination (필기시험) consisting of 100 four-option multiple-choice questions (20 questions across each of five subjects: Geodesy & GNSS, Applied Surveying, Photogrammetry & Remote Sensing, GIS, and General Surveying). Candidates who pass the written exam qualify for the composite practical examination (실기시험 복합형), which consists of a 2.5-hour written-answer examination (필답형, 60 points) and an approximately 1 hour 10 minute field instrument practical (작업형, 40 points) testing total station and leveling procedures.

What are the passing criteria and the 'gwarak' (과락) rule for the written exam?

To pass the written examination, a candidate must achieve an overall average score of at least 60% (at least 60 correct answers out of 100 questions across all five subjects) AND achieve at least 40% in each individual subject (at least 8 correct answers out of 20 per subject). Scoring fewer than 8 correct answers (below 40 points) in any single subject results in an automatic failing grade ('gwarak', 과락), regardless of how high the candidate's total score is in other subjects. The practical examination requires a combined score of at least 60 points out of 100.

What are the registration fees for the written and practical examinations?

As published on the official HRD Korea Q-Net portal (qualification code jmCd 1380, verified for 2026), the written examination fee is KRW 19,400 and the practical examination fee is KRW 36,400. Candidate registration is completed online via q-net.or.kr during designated national application windows.

How long is a written exam pass valid for the practical exam?

Pursuant to Article 21 of the Enforcement Decree of the National Technical Qualifications Act (국가기술자격법 시행령 제21조), candidates who pass the written examination are exempt from the written paper for exactly 2 years from the date the written pass is officially announced. During this 2-year window, candidates may take the practical examination without retaking the written test.

What is OpenExamPrep's relationship to the official Q-Net examination?

OpenExamPrep provides an independent English-language MCQ practice bank covering the written topics, mathematical concepts, and Korean technical terminology of Engineer Surveying Geo-Spatial Information. It is not affiliated with, sponsored by, or endorsed by HRD Korea or MOLIT. The official Q-Net exam is conducted in Korean, and all official tests and credentials must be obtained directly through Q-Net.