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Key Facts: Ahli Utama Survei Terestris Exam

Original Research Competency Units

LSP ISI and BNSP

Jenjang 9

KKNI Qualification Level

LSP ISI

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OpenExamPrep inventory

This bank provides 18 independent English MCQs across the three SS-01-AUST-09-2025 units. The official assessment can use portfolio verification, DIT, interview, or another reliable method, so the bank is concept review only.

Sample Ahli Utama Survei Terestris Practice Questions

Try these sample questions to review concepts for the Ahli Utama Survei Terestris exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 18+ question experience with AI tutoring.

1In the current realization of SRGI2013, why is a semi-dynamic datum tied to reference epoch 2021.0 used instead of a purely static classical datum?

A.To hold every station coordinate fixed at its observation epoch without applying deformation models

B.To accommodate continuous horizontal tectonic plate movements and co-seismic deformations across the Indonesian archipelago while maintaining legal cadastre and mapping stability

C.To replace the reference epoch with a different epoch for each mapping agency

D.To model tectonic motion only as a uniform translation of the entire archipelago

Explanation: BIG updated SRGI2013 horizontal coordinates from the initial epoch 2012.0 to reference epoch 2021.0 and uses deformation information so observations at other epochs can be related consistently to that national realization. This accommodates spatially varying crustal motion while preserving a common coordinate reference. This is an independent English-language MCQ study adaptation of SS-01-AUST-09-2025, not an official format simulation.

2According to the IERS Conventions (2010), what fundamental distinction separates the International Terrestrial Reference System (ITRS) from an International Terrestrial Reference Frame (ITRF)?

A.ITRS is a national datum, whereas ITRF is its two-dimensional map projection

B.ITRS is a published station coordinate catalogue, whereas ITRF is the underlying theoretical definition

C.ITRS and ITRF are two names for the same coordinate list, differing only by release year

D.ITRS is the theoretical, idealized spatial reference system defined by physical models and conventions, whereas ITRF is the practical realization through a set of physical station coordinates and velocities

Explanation: The International Earth Rotation and Reference Systems Service (IERS) defines a reference system (ITRS) as the theoretical definition including origin, scale, orientation, and fundamental constants. A reference frame (ITRF, such as ITRF2014 or ITRF2020) is the physical realization consisting of estimated coordinates, velocities, and variance-covariance matrices derived from space geodetic techniques (VLBI, SLR, GNSS, and DORIS). This question is part of an independent English-language study adaptation for the LSP ISI Ahli Utama Survei Terestris (SS-01-AUST-09-2025) competency assessment.

3For an active microplate in eastern Indonesia, the angular velocity vector is given by omega = (omega_x, omega_y, omega_z)^T in Cartesian coordinates. How is the linear surface velocity vector v at geocentric position r calculated under rigid spherical rotation?

A.v = r x omega

B.v = (omega . r) * r / |r|^2

C.v = omega x r

D.v = |r| * omega

Explanation: Under classical kinematics on a rotating sphere, the linear velocity vector v of a point with position vector r due to an Euler pole angular velocity vector omega is strictly evaluated using the vector cross product: v = omega x r. In matrix form, this is expressed as v = Omega * r, where Omega is the skew-symmetric matrix of the angular velocity components. This question is part of an independent English-language study adaptation for the LSP ISI Ahli Utama Survei Terestris (SS-01-AUST-09-2025) competency assessment.

4Given a horizontal crustal velocity field with horizontal velocity gradients dv_e/de, dv_e/dn, dv_n/de, and dv_n/dn, what are the expressions for the areal dilatation rate (dot_Delta) and maximum shear strain rate (dot_gamma_max)?

A.dot_Delta = (dv_e/de + dv_n/dn) / 2, and dot_gamma_max = dv_e/de - dv_n/dn

B.dot_Delta = dv_e/dn - dv_n/de, and dot_gamma_max = (dv_e/de) * (dv_n/dn)

C.dot_Delta = sqrt(dv_e/de^2 + dv_n/dn^2), and dot_gamma_max = dv_e/dn + dv_n/de

D.dot_Delta = dv_e/de + dv_n/dn, and dot_gamma_max = sqrt((dv_e/de - dv_n/dn)^2 + (dv_e/dn + dv_n/de)^2)

Explanation: In 2D infinitesimal strain analysis, the trace of the strain rate tensor gives the areal dilatation rate dot_Delta = e_ee + e_nn = dv_e/de + dv_n/dn. The maximum engineering shear strain rate dot_gamma_max corresponds to the diameter of Mohr's circle: dot_gamma_max = 2 * sqrt(((e_ee - e_nn)/2)^2 + e_en^2) = sqrt((dv_e/de - dv_n/dn)^2 + (dv_e/dn + dv_n/de)^2). This question is part of an independent English-language study adaptation for the LSP ISI Ahli Utama Survei Terestris (SS-01-AUST-09-2025) competency assessment.

5In epoch-transformation of coordinates from measurement epoch t to reference epoch t_0 (r(t_0) = r(t) - v * (t - t_0)), how is the transformed coordinate covariance matrix Sigma_{r(t_0)} rigorously computed when coordinates and velocity estimates have non-zero cross-covariance Sigma_{r,v}?

A.Sigma_{r(t_0)} = Sigma_{r(t)} + (t - t_0) * Sigma_v - (t - t_0)^2 * (Sigma_{r,v} + Sigma_{r,v}^T)

B.Sigma_{r(t_0)} = Sigma_{r(t)} + (t - t_0)^2 * Sigma_v

C.Sigma_{r(t_0)} = Sigma_{r(t)} + (t - t_0)^2 * Sigma_v + (t - t_0) * (Sigma_{r,v} + Sigma_{r,v}^T)

D.Sigma_{r(t_0)} = Sigma_{r(t)} + (t - t_0)^2 * Sigma_v - (t - t_0) * (Sigma_{r,v} + Sigma_{r,v}^T)

Explanation: Let r(t_0) = r(t) - Delta t * v, where Delta t = t - t_0. By applying the general law of covariance propagation: Sigma_{r(t_0)} = J * Sigma * J^T, where J = [I, -Delta t * I] and Sigma = [[Sigma_{r(t)}, Sigma_{r,v}], [Sigma_{v,r}, Sigma_v]]. Expanding this product yields: Sigma_{r(t_0)} = Sigma_{r(t)} + Delta t^2 * Sigma_v - Delta t * (Sigma_{r,v} + Sigma_{r,v}^T). This question is part of an independent English-language study adaptation for the LSP ISI Ahli Utama Survei Terestris (SS-01-AUST-09-2025) competency assessment.

6In a 4D dynamic coordinate reference frame, the complete position vector of a station subjected to tectonic motion, episodic co-seismic steps, and multi-mechanism post-seismic decay is formulated mathematically as: r(t) = r(t_0) + v*(t - t_0) + sum_k A_k*H(t - t_k) + sum_m B_m*log(1 + (t - t_m)/tau_m)*H(t - t_m) + sum_j C_j*(1 - exp(-(t - t_j)/T_j))*H(t - t_j). In this formulation, what do the logarithmic (B_m) and exponential (C_j) terms physically represent?

A.Logarithmic terms represent viscoelastic relaxation, while exponential terms represent rate-and-state afterslip

B.Both terms represent alternative parameterizations of the instantaneous co-seismic step

C.Logarithmic terms represent aseismic fault afterslip governed by rate-and-state friction; exponential terms represent viscoelastic relaxation in the lower crust or asthenospheric mantle

D.Both terms represent linear secular velocity, separated only to distinguish horizontal and vertical components

Explanation: Within the stated parameterization, the logarithmic term is assigned to time-dependent fault afterslip and the saturating exponential term to viscoelastic relaxation. Real post-seismic signals can be non-unique, so those physical assignments must be tested against observations rather than inferred from curve shape alone. This question is part of an independent English-language study adaptation for the LSP ISI Ahli Utama Survei Terestris (SS-01-AUST-09-2025) competency assessment.

7A point has ellipsoidal height h = 125.420 ± 0.020 m and geoid undulation N = 23.180 ± 0.035 m. Treating the two estimates as independent, what are its orthometric height H = h - N and standard uncertainty?

A.H = 148.600 ± 0.055 m

B.H = 102.240 ± 0.040 m

C.H = 102.240 ± 0.015 m

D.H = 148.600 ± 0.040 m

Explanation: H = h - N = 125.420 - 23.180 = 102.240 m. For independent inputs, variance propagates as sigma_H² = sigma_h² + sigma_N², so sigma_H = sqrt(0.020² + 0.035²) = 0.0403 m, reported here as 0.040 m. This is an independent English-language MCQ study adaptation of SS-01-AUST-09-2025.

8In a Global Geopotential Model (GGM), how is the external gravitational potential V of the Earth mathematically represented in spherical coordinates (r, theta, lambda)?

A.As a finite Fourier series in longitude with no radial or latitude dependence

B.As a spherical harmonic series expansion involving fully normalized spherical harmonic coefficients (C_nm, S_nm) and associated Legendre functions P_nm(cos(theta))

C.As a Cartesian polynomial whose coefficients are independent of the Earth's mass distribution

D.As zonal coefficients only, omitting every order m greater than zero

Explanation: The external gravitational potential V satisfies Laplace's equation grad^2(V) = 0 outside the Earth's mass distribution. Its solution in spherical coordinates is the spherical harmonic series: V(r, theta, lambda) = (GM/r) * [1 + sum_{n=2}^{N_max} (a/r)^n * sum_{m=0}^n (C_nm * cos(m*lambda) + S_nm * sin(m*lambda)) * P_nm(cos(theta))], where C_nm and S_nm are fully normalized gravitational potential coefficients. This question is part of an independent English-language study adaptation for the LSP ISI Ahli Utama Survei Terestris (SS-01-AUST-09-2025) competency assessment.

9In the Stokes-Helmert second condensation method of physical geodesy, what is the conceptual difference between the Direct Topographic Effect (DTE) and the Primary Indirect Topographic Effect (PITE)?

A.DTE is the potential change on the geoid, whereas PITE is the gravity-anomaly change at the Earth's surface

B.DTE is the change in the gravity anomaly at the Earth's surface caused by condensing topographical masses onto Helmert's layer, whereas PITE is the change in the geopotential on the geoid caused by the condensation

C.DTE and PITE are identical names for the same gravity-anomaly correction

D.DTE removes the long-wavelength reference ellipsoid, whereas PITE restores terrain heights after gridding

Explanation: Helmert's second condensation method shifts the topographical masses above the geoid into a surface layer on the geoid. The Direct Topographic Effect (DTE) represents the change in gravitational attraction (Delta g) on the boundary surface due to this mass condensation. However, moving masses also alters the Earth's gravity potential W, shifting the equipotential surface by delta W; this change in potential on the geoid is the Primary Indirect Topographic Effect (PITE = delta W / gamma), which must be added back to obtain the true geoid. This question is part of an independent English-language study adaptation for the LSP ISI Ahli Utama Survei Terestris (SS-01-AUST-09-2025) competency assessment.

10In processing time-averaged satellite radar altimetry over Indonesian waters, what relationship connects Mean Sea Surface height (MSS), the marine geoid height N, and Mean Dynamic Topography (MDT), when all use the same ellipsoid and sign convention?

A.MSS = N - MDT

B.N = MSS + MDT

C.MSS = N + MDT

D.MDT = MSS + N

Explanation: After time averaging and geophysical corrections, altimetry provides a mean sea surface relative to the reference ellipsoid. Mean Dynamic Topography is the mean ocean surface's departure from the equipotential marine geoid, so MSS = N + MDT, or N = MSS - MDT. This question is part of an independent English-language study adaptation for LSP ISI Ahli Utama Survei Terestris (SS-01-AUST-09-2025).

About the Ahli Utama Survei Terestris Exam

Ahli Utama Survei Terestris (Jenjang 9, scheme SS-01-AUST-09-2025) is an active LSP ISI qualification for developing innovative, original, and tested principles in geodetic references, vertical references, and precise positioning.

Exam sponsor: LSP Survei Pemetaan Ikatan Surveyor Indonesia under BNSP licensing. The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

Portfolio evidence verification, Demonstrasi Instruksi Terstruktur (DIT), interview, or another assessment method judged reliable and objective for the scheme.

Time Limit

Not published in the current official sources reviewed

Passing Score

Competency decision; numeric pass mark not published

Exam / Certification Fees

Scheme refers to applicable Ministry of Public Works rules; no fixed amount published

Exam sponsor website

Reported exam pass rate: Not published. Exam sponsor website

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

Official sources

LSP ISI — Pendaftaran Sertifikasi and Scheme SS-01-AUST-09-2025 · Source checked 2026-09-13
LSP ISI — SS-01-AUST-09-2025 scheme PDF · Source checked 2026-09-13
BNSP — LSP Survey Pemetaan Ikatan Surveyor Indonesia · Source checked 2026-09-13
Badan Informasi Geospasial (BIG) — Sistem Referensi Geospasial Indonesia (SRGI) · Source checked 2026-09-13
BIG — SRGI2013 product information and epoch 2021.0 update · Source checked 2026-09-13
BIG — INAGeoid model and validation method · Source checked 2026-09-13
IERS Conventions (2010) — terrestrial reference systems and geodetic models · Source checked 2026-09-13

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.

6 of 18 questions

M.71IGN00.293.2 — Geodetic Reference Principles

Reference-frame realization, SRGI2013, crustal kinematics, covariance, and deformation models.

6 of 18 questions

M.71IGN00.294.2 — Vertical Reference Principles

Height systems, spherical harmonics, terrain effects, altimetry, geoid validation, and gravity gradients.

6 of 18 questions

M.71IGN00.295.2 — Precise Positioning Principles

Carrier phase, SSR/OSR, integer ambiguity methods, validation, relativity, and tropospheric tomography.

Preparing for the Ahli Utama Survei Terestris Exam

What You Need to Know

Passing score: Competency decision; numeric pass mark not published
Assessment: Portfolio evidence verification, Demonstrasi Instruksi Terstruktur (DIT), interview, or another assessment method judged reliable and objective for the scheme.
Time limit: Not published in the current official sources reviewed
Exam / certification fees: Scheme refers to applicable Ministry of Public Works rules; no fixed amount published Official sources

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Ahli Utama Survei Terestris: Suggested Study Strategy

1Deeply review IERS Conventions (2010), tectonic deformation tensor mathematics, and kinematic datum transformations.

2Understand the Stokes-Helmert and Molodensky physical geodesy boundary value formulations for geoid calculation.

3Analyze multi-GNSS ambiguity resolution algorithms and state-space representation (SSR) messaging protocols.

Frequently Asked Questions

What is the qualification level for Ahli Utama Survei Terestris?

The LSP ISI scheme code identifies it as Jenjang 9 (Ahli Utama).

How does the published scope describe the expected work?

The LSP ISI listing says candidates develop new methods and technologies through research to produce creative, original, tested work and solve problems.

What are the three official units in this scheme?

The units are M.71IGN00.293.2 (Original Geodetic Reference Systems), M.71IGN00.294.2 (Original Vertical Reference Systems), and M.71IGN00.295.2 (Original Precise Positioning Principles).