Creating polygons from points?

[ChloeAsmar]

Hey all!

So I have a point shapefile and I would like to build a polygon for each consecutive 3 points in this shapefile.

- I am having a hard time figuring out how to build a polygon from points in first place.

- Is there a way to write a Python script to do that? and If yes, is it possible to add an iteration function in the script so that it build a polygon for each consecutive 3 points in my shapefile?

Thanks a bunch!

[DanPatterson_Retired]

It is possible through arcpy and the polygon class.  The example at the bottom of the link provides such an example.  Your task will be to read the features in as triplets and then save the results, however, you don't indicate your level of familiarity with programming in python or arcpy in general.

[ChloeAsmar]

Hey Dan, thanks for the reply,

I am still an amateur when it comes to programming, but learning!

I usually try to look for available scripts and sort of combine them and try to modify them to fit what I need.

[DanPatterson_Retired]

You should indicate the format of your point data to facilitate further guidance.  There may be some pre-existing tools that will help with the reading of the data, for example, the Add XY data tool and the Create Feature Class tool.  These can either be used manually within ArcMap or their associated code can be incorporated in a script to facilitate automation

[RiyasDeen]

Hi Chole,

Are you trying to create a TIN surface ArcGIS Help 10.1? If so you'll need 3D Analyst extension for that ArcGIS Help 10.1‌.

[ChloeAsmar]

Hey Riyas, no I am just trying to build separate polygons 🙂

[JanWijkstrom]

You could use this model as a base for for your work

Best regards JanW