The imagery behind the zones

Years of satellite imagery for the fields you manage, ready when you draw the boundary.

The imagery zone methods start with Sentinel-2, the satellite program the European Space Agency runs through Copernicus. Growing seasons go back to 2016, fewer on some fields.

10 m

Pixel size, fine enough to follow a zone edge.

2016–present

A season with too little clear coverage drops off the list.

Global

Sentinel-2 images farmland around the world, so location is rarely what holds a field back.

Copernicus

Fetched for you through TerraZoner’s imagery service.

Why the record matters: one wet spring says little on its own. Season after season of the same field can show a pattern a single year hides.

Each season, TerraZoner reads how green and thick the crop got at its peak. It starts with EVI2, and Composite Zones can switch to NDVI, the reading most agronomists know.

The lay of the land

TerraZoner finds the elevation for you, with nothing to upload.

Government LiDAR first, satellite elevation for the gaps.

Load a boundary, ask for elevation, and TerraZoner works out the source from where the field is: USGS 3DEP in the US, HRDEM in Canada, LidarBC in British Columbia. Elsewhere in the world, and where those sources miss all or part of a field, it uses Copernicus 30 m satellite elevation and says so each time. Satellite elevation is not LiDAR. Dips, knolls and drains narrower than about 30 m won’t show, and trees or buildings can read as high ground. On many fields it still works for terrain-refined zones and Landscape Response, though a nearly flat field can show little. Your own RTK-quality elevation points, as a zipped point shapefile, work anywhere.

Terrain hillshade or wetness view of a field with visible relief, wide view.

What elevation adds

  • Terrain refinement.

    Divide the lowest-performing zone where the terrain shows wetter and drier ground.

  • Landscape Response.

    A whole-field look at how position on the land relates to performance.

  • 3D view.

    Turn the field in 3D and see the relief before you split anything.

Coverage, drawn live

Check your area

These maps show where high-resolution LiDAR elevation exists in the United States and Canada. Each map draws the government coverage layer live, which makes it a close guide to what the app will find. British Columbia’s own LidarBC coverage isn’t drawn here.

US

United States

USGS 3DEP elevation index

3DEP source
Highlighted areas have USGS 3DEP elevation. LiDAR project outlines show if that server is offline.
CA

Canada

NRCan HRDEM elevation

HRDEM source
Highlighted areas have HRDEM high-resolution elevation. LiDAR project outlines show if that server is offline.

Outside the highlighted areas, elevation usually comes from Copernicus 30 m satellite elevation, or from RTK-quality points you upload. Not sure about a field? Request a free trial and load its boundary. The trial is 7 days, with a Google Meet demo first if you want one.