WKT is a text-based format for geospatial data. It's very common in databases. Unlike formats like GeoJSON or KML, WKT can only store one feature at a time and has no way to store properties: formats that use WKT store properties in another way, like in other columns of a database table.

WKT is often stored and sometimes transferred as WKB, a binary version of the same format that has additional geometry types and is much more efficient to store and process.

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