topic Python and Geometry in Python Questions

Python and Geometry

neilwebster — Mon, 24 Sep 2012 12:17:25 GMT

Hi All,

I'm trying to find a tutorial on using the Geometry and Cursors but I can't find anything. Can anybody point me in the direction of one? All I've been able to find are the ESRI presentations saying it's possible.

I'm trying to do something like the below code extract:

for row in arcpy.da.SearchCursor(poly, ("OBJECTID", "SHAPE@")):
 if row[0] == 82:
  geom = row[1]
  for point in arcpy.da.SearchCursor(point, ("SHAPE@")):
   pgeom = point[0]
   pgeom.intersect(geom,1)
   
   **DO SOMETHING BASED ON THE INTERACTION OF THE POINT/POLY**

Thanks

Re: Python and Geometry

ArkadiuszMatoszka — Mon, 24 Sep 2012 13:17:03 GMT

http://www.arcgis.com/home/item.html?id=ddfa7bb180e54e9581d842743a032043

You may find this presentation useful. There is simple explanation how to access geometry by cursor.

Regards.
Arek

Re: Python and Geometry

neilwebster — Wed, 26 Sep 2012 06:48:56 GMT

Thanks, I had seen that. I was after a more detailed description.

Re: Python and Geometry

ArkadiuszMatoszka — Wed, 26 Sep 2012 07:43:28 GMT

OK. This presentation + online arcpy help
(http://resources.arcgis.com/en/help/main/10.1/index.html#/Reading_geometries/002z0000001t000000/ - reading;
http://resources.arcgis.com/en/help/main/10.1/index.html#/Writing_geometries/002z0000001v000000/ - writing)

Is all I got. Can you specify what exactly you want to achieve? Maybe then we could be more helpful 🙂

Best Regards.
Arek

Re: Python and Geometry

ChristopherThompson — Wed, 26 Sep 2012 11:30:55 GMT

this latest python group blog post also deals with creating geometries and the examples use cursors: http://arcpy.wordpress.com/2012/09/14/building-feature-classes-from-numpy-arrays/