Calculate perimeter of a large polygon using geodesic calculations

Question

How do I calculate perimeter of a large vector polygon (polygon set) which spans almost half the globe? I guess regular calculations do not produce accurate results in this case.

score 1 · Accepted Answer · answered Mar 25 '18 at 14:44

In QGIS, it seems that if you have the project coordinate reference system set to an ellipsoid and not a projection, then calculating the perimeter via the field calculator will automatically use the ellipsoidal value:

In ArcGIS, the tool Add Geometry Attributes appears to give you an entire suite of geometrical and geographical calculations.

score 1 · Answer 2 · answered Mar 25 '18 at 17:04

1

You can achieve that using web mercator projection and addGeometryAtributes form ArcGIS

answered Mar 25 '18 at 17:04

Luis Felipe Fragoso

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Calculate perimeter of a large polygon using geodesic calculations

2 Answers2