In QGIS, is there a way to count the number of vertices of polygons and lines in a given layer, and create a separate field containing these values?
I suspect it's a function somewhere in the field calculator but I can't find it.
[GIS] Counting number of vertices of polygons and lines in QGIS
countqgisvertices
Related Solutions
I don't have time to try this out, but in my head it might work...if you have a unique ID for each grid square, and get that ID into a field on each point, then you should be able to get all the statistics you want by using the GroupStats QGIS plugin on the point layer, grouping by the ID. (then save that, join back to the grid and you're in business) Maybe there's something easier still...
4 years later it seems as if QGIS has integrated this feature into the field calculator. The expression syntax is:
num_geometries($geometry)
Best Answer
Number of points - just simple formula in QGIS field calculator:
num_points($geometry)
See the screenshot below: in this case, the number of vertices of each feature is added to the field "vertex" in the attribute table. Alternatively, you can create also "Create a new field" and get results there.