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TerraScan

Check soil, flood zone and other ground layers

Turn on TerraScan's map layers for a property to see shrink-swell soil, flood zone, geology, drought and more.

Updated October 25, 2026 · 2 min read · Open TerraScan

The Layers panel shows what's in the ground and around the house. Turn a layer on to draw it on the map and see its details for the property.

Steps

  1. Open the property from Properties.
  2. In the Layers panel, pick a Basemap: Satellite, Streets or Terrain.
  3. Turn on the layers you want with their switches. Type in Search layers… to find one fast.
  4. Scroll down in the panel to read the detail card for each layer that's on, for example the elevation in feet or the soil's shrink-swell rating.
The Layers panel with the Elevation and Soil detail cards
The Layers panel with the Elevation and Soil detail cards

The layers

LayerWhat it tells you
GeologyThe bedrock unit under the house.
ElevationGround elevation at the house.
SoilThe soil map unit and its shrink-swell risk.
Flood zoneThe FEMA flood hazard zone.
WetlandsWhether a mapped wetland is there.
GroundwaterMapped aquifers under the property.
SeismicityEarthquakes of magnitude 2.0 or more in the last 10 years.
DroughtThe current US Drought Monitor status.
Parcel & ownerCounty parcel, owner and tax details, where the county publishes them.
Storm damageSurveyed wind, hail and tornado damage.
Tree canopyPercent tree cover at the house.
Oil & gas wellsWells within 2 km.
Surface waterStreams and ponds within 2 km.
Contours, 3D Terrain, Township/range/sectionMap aids for the lay of the land and the survey grid.

Look at an area without a property

Click Map in the left menu. Search an address, town or ZIP, turn on layers under Layers ›, and click any spot to see What's here. Zoom in closer if a layer asks you to.

A layer says "unavailable"

That source has no data for this spot, or it didn't answer. Try again later. The rest of the layers still work.

Why is the Basemap locked?

You can't switch the basemap while you're drawing a boundary, measuring or placing a site plan. Finish or cancel that first.

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Diagnose a propertyTick what you see at the house and let the Oklahoma Foundation Brain rank the likely causes, what to measure next and the repair options.TerraScan overviewWhat TerraScan is for, and a tour of the Home, Map, Properties, Programs and Team screens and the property workspace.Measure and draw the property boundaryMeasure distances and areas on the map, save the lot boundary, and lay a site plan picture over the map.

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