Counting points creating polygon with ArcMap?

Question

I am using ArcGIS Desktop 10.5.

In land consolidation projects, to determine success of the project, we use shape indices. For this purpose to calculate shape indices, I need to know how many points creates each polygon in attribute table.

• FelixIP: Add geometry attributes will do a job.

Answer 1

From How To: Count the vertices for line or polygon features in ArcMap 10:

Procedure

1.Right-click the layer to be evaluated in the Table of Contents and click Open Attribute Table.

2.From the Table Options drop-down, click Add Field to add a new field to the table.

3.Name the field VxCount and select Long Integer for the field type. Click OK.

4.Right-click the heading of the new field and click Field Calculator. Under Parser, select Python. In the main expression box, set:

VxCount = !shape!.pointcount

If you dont want to count the polygon start and endpoint (which is at the same location) twice:

VxCount = !shape!.pointcount-1

• Bera: @Fırat Arslan , nice, can you accept my answer with the checkbox?
• radouxju: +1, but three remarks: i) python is case sensitive, so you should use "pointCount" (capital C) ii) shape is the geometry field name, which could also be Shape or a completely different name (also case sensitive) iii) If the geometry is correct, there will be a start and an end point "closing" the polygon, at the same position. so for index computation, it is more relevant to use !Shape!.pointCount -1
• Bera: @radouxju, I just copy-pasted it from ESRI :). I tried it now though both on a fc in a file geodatabase and a shapefile and it is not case sensitive on pointcount or shape.
• radouxju: I also tested with field calculator on 10.4 and you are right (not cases sensitive) but python usually is case sensitive and arcpy is less forgiving than the field calculator