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Add section on winding order #59

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Apr 19, 2022
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Add section on winding order #59

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Add section on winding order
felixpalmer Apr 5, 2022
eb8b827
Merge branch 'main' into felix/winding-order
alasarr Apr 18, 2022
f2d1e27
Update format-specs/geoparquet.md
alasarr Apr 18, 2022
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4 changes: 4 additions & 0 deletions format-specs/geoparquet.md
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Expand Up @@ -105,6 +105,10 @@ The axis order of the coordinates in WKB stored in a geoparquet follows the de f
(x, y) where x is easting or longitude and y is northing or latitude. This ordering explicitly overrides the axis order as specified in the CRS.
This follows the precedent of [GeoPackage](https://geopackage.org), see the [note in their spec](https://www.geopackage.org/spec130/#gpb_spec).

#### Polygon winding

The winding order of polygons follows the [GeoJSON spec](https://datatracker.ietf.org/doc/html/rfc7946#section-3.1.6). Polygon rings MUST follow the right-hand rule for orientation (counterclockwise external rings, clockwise internal rings).
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#### edges

This attribute indicates how to interpret the edges of the geometries: whether the line between two points is a straight cartesian line or the shortest line on the sphere (geodesic line). Available values are:
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