No field is flat
Click a field. This page takes its outline from the Fields of the World harmonized field data and its heights, every metre or half metre, from the open elevation model of that country or state, and stretches the colours over that one field. Differences of a few centimetres show up: old creek beds, ridges and furrows, hollows, banks of hedges long gone.
Zoom in to see the fields
Examples
Fields from the map, each in its own colours. The facts under each picture are measured from the same data the map reads; click one to see it there.
About the data
- Fields
- The newest edition of each collection in the Fields of the World harmonized field data, read from its single PMTiles archive. Only the collections an open height model covers are drawn; zoomed out, the map shades how much of the land those fields cover instead (precomputed per 600 m cell). In some (Germany's states, Luxembourg) a field is a block that several crops can share. Outlines are those the farmers or the authorities declared, and can be off by a few metres.
- Heights
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Open terrain models of 1 m or finer, only laser points on the ground, read from each publisher's own
service while you watch:
- Colours
- Each field gets its own scale: the lowest 2 % of its cells are dark blue, the highest 2 % yellow, and a light from the north-west adds shading. Two fields in the same colours can differ by metres; read the heights under the histogram, or hover over the field.
- Caveats
- Fields and heights are from different years: a field that was levelled, dug or built on since the flight does not match. Heights are above each country's own sea level, so they do not compare across borders.
- Built with
- OpenLayers, ol-pmtiles and geotiff.js; everything is computed in your browser. Code on GitHub.