topic Re: Find Intersection between two polygons in Developers Questions

Find Intersection between two polygons

chandrasekhar_reddyguda — Tue, 18 Oct 2016 10:35:47 GMT

Hi All!

I got a feedback from our customer, where there is a gap/overlap between two polygons, when we look into ArcMap could not see the overlap area even in maximum zoom, but if we see other software clearly we can notice the overlap between two polygons.

I tried with ArcMap built-in tool intersect (Analysis) but could not identified the overlap areas .

and I tried with Arcobjects .net coding where used ITopolygical operater

ITopologicalOperator tOper=polygon1 as ITopologicalOperator

IGeometry resultGeom = (IGeometry)tOper.Intersect(polygon2, esriGeometryDimension.esriGeometry1Dimension);

instead of coming intersection area got hole area (both) as output (input and output is same)

when measure the distance between these intersected polygons in other software the distance is ~ 0.0000000002

Below is the Customer given intersected area shape file :

i am using .net 10.2.2 SDK , hence kindly provide the solution with arcobjects.

Re: Find Intersection between two polygons

JoshuaBixby — Tue, 18 Oct 2016 15:07:05 GMT

Are these shapefiles or feature classes in a geodatabase? If the latter, what are your XY resolutions and XY tolerances? Can you upload an example?

Re: Find Intersection between two polygons

chandrasekhar_reddyguda — Tue, 18 Oct 2016 15:27:20 GMT

Hi joshua,

find below answaers

Are these shapefiles or feature classes in a geodatabase?

These are shapefiles

what are your XY resolutions and XY tolerances?

The tolerance is 0.00001