This geometry does not validate according to http://geojsonlint.com/ because it is clockwise.
GeoJSON IETF RFC 7946 section 3.1.6. Polygon specifies a counter-clockwise order of coordinates for exterior polygon rings:
A linear ring MUST follow the right-hand rule with respect to the
area it bounds, i.e., exterior rings are counterclockwise, and
holes are clockwise.
The order of coordinates in transform-envelope.js could use adjusting to be compliant with the RFC. This will enable better validation of the GeoJSON and any tests on them.
rgwozdz
commented
5 years ago
An Esri envelope option specified to Winnow is normalized to a GeoJSON Polygon incorrectly.
Input of envelope:
{"xmin":-180,"ymin":-180,"xmax":0,"ymax":0,"spatialReference":{"wkid":4326,"latestWkid":4326}}Results in a geometry inside sql.js of:
{"type":"Polygon","coordinates":[[[-180,-180],[-180,0],[0,0],[0,-180],[-180,-180]]]}This geometry does not validate according to http://geojsonlint.com/ because it is clockwise.
GeoJSON IETF RFC 7946 section 3.1.6. Polygon specifies a counter-clockwise order of coordinates for exterior polygon rings:
The order of coordinates in transform-envelope.js could use adjusting to be compliant with the RFC. This will enable better validation of the GeoJSON and any tests on them.