Field notes

What it actually costs to process 167 photos

One real dataset, measured end to end: wall-clock time, peak memory, scratch space and output size. No estimates.

Six ways a stockpile volume comes out quietly wrong

Volume change between two flights is the most trusted number in drone surveying and the easiest to get wrong without any error message.

Why your map is 2–6 m off, and when that matters

Relative and absolute accuracy are different things. Confusing them is how people end up disappointed by a perfectly good model.

You do not need a workstation, you need 21 GB of RAM for an hour

The economics of buying hardware for photogrammetry, against the economics of renting it for the length of one job.

Stockpile volumes that survive an audit

Your volume number will eventually be argued with — by a customer, an auditor, or your own finance team. Here is how to make it defensible before that happens.

Cut and fill without a surveyor on site

Weekly earthworks progress is a drone flight and a design surface. What that gets you, and where it stops being good enough.

Why two drone surveys of the same site never line up

You flew the same quarry twice and the software says material moved that nobody touched. Here is what is actually happening.

An AI agent that can actually measure your site

Not a chatbot bolted onto a map. A tool surface an agent can call — list flights, measure a polygon, compare two surveys — and what that changes.

Where 44 minutes goes: one flight, timed stage by stage

Seventy-seven photos, one 8-core machine, three engine settings. The stage-by-stage clock, the one same-dataset GPU number that exists, and what it takes to run the alternatives.