idea Arcade IsSimple() function docs: Explain what “topologically simple” means in ArcGIS Pro Ideas

Arcade IsSimple() function docs: Explain what “topologically simple” means

Bud — Thu, 24 Mar 2022 12:31:15 GMT

In the Arcade IsSimple() function docs:

IsSimple(inputGeometry) -> Boolean
Indicates if the given geometry is topologically simple.

It would help if the docs could explain what is meant by “topologically simple”. Not everyone reading those docs is fluent in topology lingo.

Re: Arcade IsSimple() function docs: Explain what “topologically simple” means

DavidPike — Sun, 20 Mar 2022 15:25:29 GMT

possibly https://developers.arcgis.com/net/api-reference/api/netstandard/Esri.ArcGISRuntime/Esri.ArcGISRuntime.Geometry.GeometryEngine.IsSimple.html but explicitly detailed or a link to guidance would of-course be better.

Re: Arcade IsSimple() function docs: Explain what “topologically simple” means

Bud — Sat, 02 Apr 2022 22:24:25 GMT

@DavidPike

For what it’s worth, the St_geometry docs (page 18) explain it like this:

The ST_LineString is simple if it does not intersect its interior.
The graphic below shows examples of ST_LineString objects: (1) is a simple, nonclosed ST_LineString; (2) is a nonsimple, nonclosed ST_LineString; (3) is a closed, simple ST_LineString and, therefore, a ring; and (4) is a closed, nonsimple ST_LineString—it is not a ring.