- What This Cheat Sheet Covers (and What It Doesn't)
- Credential Snapshot: Who, What, Where
- The Ten-Row Matrix at a Glance
- Photogrammetry: The 70% Block You Must Own
- The Five 6% Categories
- Why Four Rows Show 0%
- Exam-Day Mechanics and Allowed Materials
- Fees, Attempts and Deadlines
- Eligibility and Recertification Quick Reference
- A Short Sequencing Plan Tied to the Weights
- Frequently Asked Questions
- CPT here means ASPRS Certified Photogrammetric Technologist, delivered through Prometric; it is not the Certified Photogrammetrist (CP) credential.
- Photogrammetry carries roughly 70% of the exam; five other categories each carry roughly 6%.
- The written exam has a two-hour limit and allows one bound reference, a handheld calculator and scratch paper.
- Approved applicants have six months to test; a failed first attempt allows one retake within six months.
What This Cheat Sheet Covers (and What It Doesn't)
This page condenses the facts a Certified Photogrammetric Technologist candidate needs into a single scannable reference. It focuses on the weighting of the content matrix, the exam-day rules, the fee and attempt mechanics, and the eligibility and recertification rules that ASPRS publishes. For the deeper treatment of each topic, follow the links to the longer guides on this site, such as the CPT study guide and the complete domains guide.
One honest limitation up front: a current official question count, numeric passing threshold and pass rate were not verified from ASPRS sources, so none appear here. If you are building a full-length mock exam, confirm the current item count with ASPRS before you configure your timer and scoring. Our companion articles on the passing score and pass rate explain what is and isn't publicly known.
Credential Snapshot: Who, What, Where
| Item | Fact |
|---|---|
| Issuer | American Society for Photogrammetry and Remote Sensing (ASPRS) |
| Testing provider | Prometric (test center or online remotely proctored) |
| Format | Computer-based written technologist examination |
| Time limit | Two hours |
| Results | Program page reports immediate examination results |
| Largest content area | Photogrammetry, approximately 70% |
| Recertification cycle | Three years, 60 professional development hours |
The credential is aimed at the production side of the mapping profession: people who process imagery, build mapping products and apply photogrammetric principles in day-to-day work. If you are weighing the job market for this credential, see our overview of CPT jobs and the broader what is CPT certification explainer.
The Ten-Row Matrix at a Glance
The weights below reproduce the rows of the official ASPRS examination matrix under the column for the mapping technologist in photogrammetry. ASPRS describes these allocations as approximate and notes that actual exam percentages may vary, so treat them as planning guides rather than guarantees.
| Category | Approximate weight |
|---|---|
| Mathematics | 6% |
| Earth Science | 6% |
| Engineering/Surveying | 6% |
| Physics | 6% |
| Professional/Ethical | 6% |
| Remote Sensing | 0% |
| Photogrammetry | 70% |
| GIS/LIS | 0% |
| Lidar | 0% |
| UAS | 0% |
Key Takeaway
The matrix is lopsided by design. If you divide your study hours evenly across ten rows, you will under-invest in the one category that decides the exam. Allocate time in proportion to the weights, and keep a smaller, steady maintenance block for the five 6% categories.
Photogrammetry: The 70% Block You Must Own
With roughly 70% of the approximate allocation, Photogrammetry is effectively the exam. A candidate who is fluent here has most of the matrix covered; a candidate who is shaky here cannot make it up from the supporting categories, because those five together account for only about 30%.
Photogrammetry (approximately 70%)
Expect the content to center on how measurements are derived from overlapping imagery and how mapping products are built from them. Work from the topics that a technologist handles in production.
- Image geometry: scale, relief displacement, flying height, focal length and the relationships among them.
- Stereo concepts: overlap and sidelap, parallax, base-to-height ratio and how they affect measurement quality.
- Camera and sensor calibration: interior orientation elements and what a calibration report tells you.
- Orientation and control: exterior orientation, ground control, aerotriangulation and what error budgets mean in practice.
- Products: orthophotos, digital elevation models, mapping compilation and the accuracy considerations behind each.
- Planning: flight planning parameters, coverage calculations and the trade-offs between cost and accuracy.
Many of these topics are calculation-friendly, which matters because a handheld calculator is permitted. Practice the standard relationships until you can set up a scale, ground-coverage or overlap problem quickly and sanity-check the answer's units and magnitude. Our practice test hub is a convenient place to drill this style of problem, and the difficulty guide discusses where candidates typically struggle.
The Five 6% Categories
Each of these five categories carries approximately 6%. Individually they are small, but together they are a meaningful slice, and they tend to be where experienced production staff leak points because they sit adjacent to daily work rather than inside it.
Mathematics (approximately 6%)
Foundational quantitative skills that underpin photogrammetric computation.
- Algebra, trigonometry and unit conversion under time pressure
- Basic statistics as used to describe measurement error
- Coordinate geometry and working with angles and distances
Earth Science (approximately 6%)
The physical Earth that mapping products represent.
- Datums, ellipsoids and the idea of a reference surface
- Terrain, landforms and how relief affects imagery
Engineering/Surveying (approximately 6%)
The control and measurement framework that ties imagery to the ground.
- Horizontal and vertical control concepts
- Coordinate systems and projections at a working level
- Accuracy standards and how survey checkpoints are used
Physics (approximately 6%)
The optical and radiometric principles behind image formation.
- Light, optics, lenses and image formation
- Atmospheric effects on imagery
Professional/Ethical (approximately 6%)
The standards of conduct expected of a certified individual. This ties directly to the ethics declaration in the application.
- Professional responsibility and honest representation of work
- Compliance with the certification program's rules
The domains guide expands each of these with example topics if you want a deeper checklist.
Why Four Rows Show 0%
Remote Sensing, GIS/LIS, Lidar and UAS appear in the published matrix with 0% in the technologist photogrammetry column. They are retained here for source fidelity, because they are real rows in the official document, but they do not represent additional tested coverage for this exam. Do not spend scarce study hours on them for the purpose of the written test.
Exam-Day Mechanics and Allowed Materials
- Time: two hours of testing time.
- Permitted items: one bound reference, a handheld calculator, a writing device and scratch paper, following the approved delivery instructions.
- Not open-book: the single bound reference is a limited allowance, not unrestricted access to your library.
- Delivery options: a Prometric test center or online remote proctoring. ASPRS recommends a test center when practicable.
- Remote requirement: online testing requires a personal computer rather than a work or government device.
- Results: the program page reports immediate examination results.
Choose your one bound reference deliberately. It works best as a fast-lookup tool for formulas and definitions you have already learned, not as a substitute for understanding. If you find yourself needing to read at length during the exam, the two-hour limit will punish you. For scheduling realities, see the exam dates and scheduling guide.
Fees, Attempts and Deadlines
The fee figures below come from the dated June 2026 ASPRS manual. The Prometric examination charge is separate and additional.
| Fee type | Member | Non-member |
|---|---|---|
| Initial certification application | $200 | $395 |
| Recertification application | $125 | $325 |
Attempt rules in brief
- Once your application is approved, you must take the examination within six months.
- The manual permits two attempts per approved application.
- After an unsuccessful first attempt, one retake is allowed within six months of that attempt. An extension can be requested for extenuating circumstances.
- A second failure requires a new application, new fees and updated references.
- Prometric charges apply to the retake.
Eligibility and Recertification Quick Reference
Eligibility
The detailed technologist section of the manual calls for three years of total experience, including at least two years in the specialty, plus four references, an ethics declaration, application review and a successful examination. There is a documented source conflict: the program overview, the manual's introductory summary and the October 2025 application describe three years of specialty experience instead. Because the sources disagree, ask ASPRS to resolve your individual eligibility before you pay anything. Treat any checklist, including the one here, as conditional until ASPRS confirms.
- Educational credit can count for one-half year of experience.
- The manual's page 24 permits an associate or higher degree, while the earlier page 14 table names bachelor's, master's and doctoral degrees in engineering or the natural or physical sciences. Have ASPRS confirm which degree qualifies and how your experience is calculated.
- ASPRS does not require its own training as a prerequisite.
Our requirements guide goes further into documenting experience and choosing references.
Recertification
- Cycle: three years for the technologist credential. Use this technologist-specific rule rather than the generic five-year language that appears elsewhere in the guidelines.
- Hours: 60 professional development hours.
- Employment cap: continuing employment can contribute no more than 30 of those hours.
- References: four references are required.
Key Takeaway
Start logging professional development the day you are certified. Because employment counts for at most half of the 60 hours, you will need at least 30 hours from other activities, and finding those in the final months of the cycle is stressful.
A Short Sequencing Plan Tied to the Weights
Rather than a generic schedule, sequence your preparation around the matrix. The point is proportion: front-load the 70% block, then cycle the five 6% categories so none decays. The full study guide offers more detail, and the ROI analysis helps you decide how much time the credential deserves.
Photogrammetry fundamentals
- Image geometry, scale, relief displacement and flight-planning calculations
- Stereo, parallax and overlap relationships
Photogrammetry production topics
- Calibration, orientation, control and aerotriangulation
- Orthophoto and elevation-model accuracy concepts
Supporting categories
- Mathematics and Physics review, then Earth Science and Engineering/Surveying
- Professional/Ethical standards
Timed practice and reference prep
- Two-hour timed sets using only a calculator and one bound reference
- Tab and organize your reference for quick lookup
Adjust the length to your experience; a seasoned production technician may compress the early weeks, while someone newer to stereo geometry should extend them. Use the practice tests to find your weak spots, then return to the relevant block.
Frequently Asked Questions
It stands for Certified Photogrammetric Technologist, an ASPRS credential. It is distinct from the Certified Photogrammetrist (CP) scientist credential and from unrelated certifications that share the acronym. The what does CPT stand for article covers the naming in more detail.
Photogrammetry, at approximately 70% of the published allocation. The five other positive categories are each approximately 6%, and ASPRS notes that actual percentages may vary.
Only within limits. The manual permits one bound reference, a handheld calculator, a writing device and scratch paper, following the approved delivery instructions. It is not unrestricted open-book access.
Two. After a failed first attempt you may retake once within six months, with an extension possible for extenuating circumstances. A second failure requires a new application, fees and updated references, and Prometric charges apply to the retake.
The technologist credential recertifies on a three-year cycle, requiring 60 professional development hours and four references, with continuing employment contributing no more than 30 of those hours.