Data sources and accuracy

01

Sources

Part of the model	Source	Measured or mapped
Terrain	USGS 3D Elevation Program (3DEP) LiDAR	Measured
Building heights	USGS 3DEP LiDAR	Measured; estimated where missing
Building outlines	OpenStreetMap and Microsoft building footprints	Mapped
Streets, paths and water	OpenStreetMap	Mapped
Ground imagery	Esri, Maxar, Earthstar Geographics	Imagery, restored for a natural look
Tree canopy	Aerial imagery	Mapped
Parcels, addresses, zoning	County and city public records	Official records
Facades	Street-level photo survey (Mapillary contributors)	Photographed

02

How accurate is it?

Building outlines and streets are where OpenStreetMap maps them, and terrain and building heights are measured by LiDAR. It is a credible planning model of a place, not a survey-grade twin.

03

Honest about gaps

What the data can't see, such as an unseen roof, a rear wall or a missing height, is estimated, and the app labels it as estimated. GeoFrame is a planning model, not a survey: for anything that needs survey accuracy, use a survey.

04

Attribution

Every district records where its data came from, and the app credits every source on screen. When you use a GeoFrame image or video, keep the credit line with it:

Imagery © Esri, Maxar, Earthstar Geographics · Terrain and heights: USGS 3D Elevation Program · Map data © OpenStreetMap contributors · Building footprints © Microsoft (ODbL)

05

How current is it?

Each layer is as current as its source. County records can lag recent sales and changes. Government plans keep all areas in the jurisdiction current; ask us how often for your area.

Click any building to see the property behind it: owner of record, APN, lot size and zoning.

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Selecting and building districts

Pick a square of the map and GeoFrame builds it as measured 3D terrain with everything standing on it.

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SEE IT ON YOUR OWN SITE

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