Field notes from working surveyors.
Practical, Singapore-specific writing on photogrammetry, RTK survey, drone regulations, subsurface mapping and the geospatial stack we deploy every week.
PIX4D vs DJI Terra — Which Photogrammetry Stack for Singapore?
Side-by-side comparison of the two photogrammetry tools Singapore engineering teams ask about most. Accuracy, ecosystem, licensing, training and what wins which job.
Read post →SVY21 Explained — Singapore’s Coordinate System for Surveyors
EPSG:3414, datum, projection, why your DXF drifts when you forget the grid. The plain-English brief every Singapore drone operator and GIS analyst should know.
Read post →CAAS Drone Permits in Singapore — Operator, UAPL, Activity Permits
What an Operator Permit is, what a UAPL is, when you need an Activity Permit, and how Easepect handles the regulatory paperwork on every flight.
Read post →Setting Up SiReNT NTRIP Corrections on Emlid Reach
Step-by-step setup of the Singapore Land Authority SiReNT NTRIP service inside Emlid Flow — credentials, mountpoint, baseline check and a fixed solution in seconds.
Read post →ASCE 38 vs PAS 128 — Subsurface Utility Standards Compared
Two standards. Same goal: rate the trustworthiness of every utility record. Quality Levels A through D, what they mean, and where PIX4Dcatch + RTK fits.
Read post →Multispectral vs Hyperspectral Imaging — Which One You Actually Need
5 bands or 96? When MicaSense beats Living Optics, when Living Optics is the only option, and the $40k question that decides the procurement.
Read post →How Accurate is Drone Photogrammetry? A Field Surveyor’s Guide
Cm-grade vs metre-grade. The math behind GSD, RTK GCPs and checkpoint validation — plus the honest answer to *what accuracy you can actually defend*.
Read post →Building a Subsurface Utility Digital Twin with PIX4Dcatch
The methodology now in production with the Singapore Land Authority — open-trench scan to QL-A as-built record, AR overlay through closed ground, GIS publishing.
Read post →Going deeper.
For longer-form tutorials, accuracy benchmarks and the full Singapore photogrammetry playbook, visit our companion knowledge site photogrammetry.com.sg.
Let us scope the right stack for your project.
Tell us about your site, your accuracy target and your timeline. We will come back with a short technical proposal — not a catalogue.