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Understand what happens to the data
There are three jobs to distinguish, even when one platform offers all of them.
Processing converts captures into usable outputs. Photogrammetry
reconstructs geometry from overlapping photographs; its outputs can include a
point cloud, a collection of 3D points, or an orthomosaic, a georeferenced image
map. A textured mesh connects reconstructed geometry into surfaces for viewing.
These outputs have different uses and should remain distinguishable from the
original photographs.
Inspection review lets a person locate relevant evidence, annotate an
observation, assign a condition category, and retain the reasoning behind a
finding. For example, Flyability describes Inspector Desktop tools for reviewing
footage, working with points of interest and annotations, and producing reports.
Its online offering adds capabilities including comparison between inspections.
Those are provider-described functions, not proof of performance on your assets.
See the Inspector feature description
for the product boundary.
Asset workflow connects reviewed findings to the owner's asset register and
follow-up work. A flight folder is useful to the pilot; a maintenance team needs
the component identity, location, current condition, evidence, and action owner.
Ask which system owns each field and which one is the authoritative record after
handover.
For occasional visual inspections, organized originals, a structured finding
register, and a readable report may be sufficient. Repeat inspections across
many assets make persistent component IDs, history, and integrations more
valuable. Choose the required workflow first; do not make a 3D reconstruction
mandatory if it adds no useful location or measurement information.
Specify deliverables before comparing features
Ask for both a readable report and data that can be used elsewhere. The report
explains the finding; the export preserves the records and files needed to
revisit it.
Esri's
Site Scan export documentation
distinguishes a PNG orthomosaic preview for presentation from the TIFF used for
raster analysis. It also describes LAS and compressed LAZ point-cloud exports,
with a reminder to check the receiving software's LAZ support. A format name on
a feature list is only the start of the compatibility check.
Use this matrix to specify the handover. The file examples draw on Esri's export
documentation; the checks are editorial recommendations to adapt to your asset
and receiving systems.
Scroll horizontally to compare all columns.
Check export completeness explicitly. In
Site Scan's measurement export instructions,
CSV is limited to points, and only measurements enabled on the map are included
in the export. This is a concrete example of why “CSV export” does not
necessarily mean every object and field will leave the platform.
Ask for record counts before and after export, plus a list of unsupported
fields. If severity, comments, or image references need a separate export,
include that step in the handover procedure and cost estimate.
Verify measurement, thermal, and AI claims
A detailed model does not establish measurement accuracy
If software will support dimensions or change measurements, specify the
quantity, permitted error, units, and relevant reference system before judging
the demonstration. Ground sample distance describes the ground represented by an
image pixel. It does not independently establish positional accuracy.
The
USGS imagery-calibration report
explains that ground control and tie-point quality contribute to geometric
accuracy regardless of ground sample distance. It also recommends retaining
calibration information and uncertainty in metadata. Ask for independent check
results appropriate to your measurement task, and distinguish those from how
closely the processing fitted the control data used to build the model.
For repeat inspections, require the reviewer to account for alignment, capture
geometry, coverage, and processing differences before calling an apparent change
physical deterioration. Preserve the earlier processing version. Reprocessing an
old dataset should not silently replace the baseline used in an earlier
decision.
The
six levels of drone-inspection evidence
can help your team separate a visible observation from a measurement or
diagnosis before specifying software outputs.
Thermal support must preserve the required data
Radiometric files retain data used for temperature analysis. A colored thermal
image can provide a useful visual overview while lacking the values needed for
quantitative work.
Pix4D's current
PIX4Dmapper thermal-processing guidance
distinguishes legacy supported radiometric formats from newer formats that it
cannot process radiometrically. It also explains that thermal JPEGs processed as
ordinary RGB images produce visual maps without extractable temperature values.
Support differs across the company's applications and versions, so a general
promise of “Pix4D compatibility” is insufficient.
Request a trial with files from your exact sensor and capture settings in the
proposed software version. Confirm whether the result contains temperature
values, which units and corrections apply, and whether those values survive
export. Have the thermography specialist determine the settings and operating
conditions needed for interpretation. A successful import alone does not answer
those questions.
AI results need a defined task and a review route
Detecting a component, classifying a defect, and flagging an unusual image are
different tasks. The
InsPLAD power-line inspection study
evaluates those tasks separately and describes challenges including occlusion,
varied lighting, perspective, and objects appearing at different scales. Its
results concern its own dataset; they do not validate a commercial system on
another asset class.
When a supplier presents an accuracy claim, ask what was counted, which defect
classes were included, and how the evaluation data were separated from training
data. Request the numbers of missed defects and false alarms by class, together
with the conditions represented. One aggregate percentage can conceal the
failure mode that matters most to your operation.
Keep suggested findings distinct from reviewer-accepted findings. The
demonstration should show how a reviewer rejects an incorrect suggestion,
records a missed condition manually, and retains the original evidence. Treat
images with inadequate visibility as not assessed, rather than automatically
healthy.
Make the maintenance connection concrete
A geographic information system, or GIS, organizes spatial information. A
computerized maintenance management system, or CMMS, organizes maintenance work.
An enterprise asset management system, or EAM, may hold the wider asset record.
Agree which system receives the observation and which one controls the resulting
action.
For a hypothetical roof finding, the handoff might carry an asset ID,
roof-section ID, finding ID, observation text, evidence references, reviewer
status, and follow-up owner. Those are proposed fields, not a report of an
actual defect. Have your receiving-system administrator map them before
accepting an integration claim.
For an application programming interface, or API, request the exact supported
operations. Can it transfer attachments as well as text? Create and update a
finding? Retrieve review history? Return the maintenance work-order ID?
Determine whether the connector is supplied, configured for your system, or
still requires development. Check transfer limits, version support, and whether
evidence links expire before the maintenance record does.
Test three failure cases: resend the same finding, interrupt a transfer, and
update a reviewed record. The required behavior is no duplicate work order, a
recoverable failed transfer, and a clear rule for which system's revision wins.
Specify how errors become visible and who resolves them.
Access controls also belong in the demonstration. Use representative
administrator, reviewer, and external-client roles to verify viewing, editing,
downloading, and sharing permissions. Obtain written answers on hosting
location, retention, backups, restoration, subcontractor access, and use of your
data for model training. A general security statement does not answer those
operational questions.
Count costs through retention and exit
Compare proposals over the same intended term and workload. Ask each supplier to
identify the charging unit: users, assets, projects, processing allowance,
storage, automated analysis, or a combination. Establish how reviewers and
client viewers are counted, and which export or integration functions require an
additional entitlement.
A useful planning formula is:
Total software ownership cost over the chosen term = setup and migration +
subscription and usage charges + review and data-preparation labor + integration
and support + retention, export, and exit costs.
This is a budgeting structure, not a quoted price or market average. Populate it
with written supplier terms and your own measured staff effort. Include
conversion, manual relabeling, exception handling, retraining, and the
infrastructure needed for any desktop processing. Do not count the same labor
under both setup and recurring work.
Measure elapsed delivery time separately from staff time. Processing may run
unattended, while a short export may still require repeated manual corrections.
Time a representative job through accepted handover and record which stages
consume staff effort. That gives a better basis for evaluating a savings claim
than processing speed alone.
Before signing, settle what happens at cancellation: how long export remains
available, whether old reports remain accessible, what format the archive uses,
and whether bulk download or assistance costs extra. Include a rehearsal of that
archive retrieval in the evaluation. Data ownership language is useful only
alongside a workable way to obtain and use the data.
Give shortlisted suppliers the same representative captures, asset register,
required fields, and downstream import instructions. Include difficult imagery
and an earlier visit if repeat inspection is part of the job. Have the asset
specialist define what the sample supports before using it to judge automated
results.
Then follow one finding through the complete sequence:
- Import the captures and identify any rejected files or lost metadata.
- Locate the component and link the finding to its original evidence.
- Review the observation, revise it, and retrieve its decision history.
- Export the report, structured record, attachments, and required spatial or
thermal data.
- Import the finding into the receiving system and exercise the duplicate and
failed-transfer cases.
- Retrieve the same finding from the exit archive and, where required, compare
it with the previous visit.
Choose according to the work that survives this demonstration. A small
visual-inspection program may need a dependable register and file handoff. A
repeated measurement program needs demonstrated quality controls and baseline
management. A multi-asset maintenance program needs stable identities, review
history, and dependable integration. If the proposed system cannot preserve the
required evidence or complete the receiving-system handoff, resolve that gap
before committing to it.
Source notes
Last checked: September 7, 2026.