wkt
What is a .wkt file?
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WKT (Well-Known Text) is the OGC's human-readable encoding for geometry and for coordinate reference systems. Geometry WKT spells out a type and its coordinates — POINT, LINESTRING, POLYGON, and their MULTI and GEOMETRYCOLLECTION forms — while CRS WKT nests PROJCS, GEOGCS, DATUM, and PARAMETER clauses. Its binary counterpart, WKB, encodes the same geometry model compactly.
How to use a .wkt file
Use an example .wkt file to test geometry parsers and CRS handling, exercising polygons with interior rings, empty geometries, coordinate precision, and the difference between WKT geometry and WKT coordinate-system definitions.
Download example .wkt files
- Kestrel Bay Territory — One WKT Geometry Per LineEvery geometry in the territory as a bare WKT string, one per line and in master order. Attributes are deliberately absent so the file isolates geometry serialisation from attribute mapping.
- WKT — POINTA single WKT value for the Kestrel Bay town centre. WKT nests with bare parentheses and no type tags on the inner parts, so the number and depth of brackets is the only thing that distinguishes a polygon ring from a multipolygon member — which is where hand-written parsers go wrong.
- WKT — LINESTRINGA single WKT value for the four-vertex Coast Road. WKT nests with bare parentheses and no type tags on the inner parts, so the number and depth of brackets is the only thing that distinguishes a polygon ring from a multipolygon member — which is where hand-written parsers go wrong.
- WKT — POLYGONA single WKT value for the Mill Court parcel and its courtyard. WKT nests with bare parentheses and no type tags on the inner parts, so the number and depth of brackets is the only thing that distinguishes a polygon ring from a multipolygon member — which is where hand-written parsers go wrong.
- WKT — MULTIPOLYGONA single WKT value for all three parcels in one geometry. WKT nests with bare parentheses and no type tags on the inner parts, so the number and depth of brackets is the only thing that distinguishes a polygon ring from a multipolygon member — which is where hand-written parsers go wrong.
- WKT — GEOMETRYCOLLECTIONA single WKT value for a point, a line and a polygon in one value. WKT nests with bare parentheses and no type tags on the inner parts, so the number and depth of brackets is the only thing that distinguishes a polygon ring from a multipolygon member — which is where hand-written parsers go wrong.
- WKT — Z (three-dimensional) GeometryA point with an explicit Z dimension tag. Some producers write `POINT Z (x y z)` and others write `POINT(x y z)` with no tag at all, so a parser has to cope with the dimension being declared or merely implied by the ordinate count.
- WKT — M (measured) GeometryA point with an M (measure) ordinate rather than a Z. Written without the tag this is indistinguishable from a Z geometry, and a parser that assumes the third ordinate is elevation silently converts a 345-second measure into a 345-metre altitude.
and 4 more in the library.