How Accurate Are Your Maps?

Short answer: positions on our maps land within 2–5 cm horizontally and 5–10 cm vertically. A handheld GPS is off by a few meters.

Two things people mean by 'accuracy'

1. Resolution (detail) is how much you can see. Our aerial maps are 1–3 cm per pixel, so a crack in a slab shows. Satellite imagery is often about 50 cm per pixel.
2. Positional accuracy (correctness) is how close a mapped point is to its true position. That is the 2–5 cm / 5–10 cm figure, and it is what measuring relies on.

Where the number comes from

Every flight is RTK-corrected: a live correction signal pins the drone's position far more tightly than a phone or handheld GPS can.

That is how our delivered work lands at 2–5 cm horizontally and 5–10 cm vertically. We don't promise tighter than our delivered work records.

What affects the number in practice

• Tree and brush cover. A photo map measures the top of the canopy. Under cover, bare-earth terrain and volumes need a LiDAR scan.
• What you measure. A crisp corner or painted line measures tighter than a fuzzy edge, like a bush.
• Height versus position. Heights run looser, which is why we always state both numbers.

What you can do with the data

• Measure distances, areas and acreage in the browser viewer.
• Measure stockpile and cut/fill volumes for a report.
• Plan grading, drainage, siting and expansion from real elevation data.
• Hand georeferenced files to an engineer or GIS team.

The honest limit

This is mapping, not licensed land-surveying. It is precise enough to plan, measure and document from. Every deliverable carries this line on purpose, and it protects you as much as us:

This data is not a legal survey. Embry Solutions LLC does not perform land surveys. For boundary, subdivision, or title surveys, please consult a licensed Texas surveyor.