I have a question regarding the inpolygon function.
I have to classify points which are located on the boundary of a polygon shapefile, which is given in Gauss-Krüger coordinate system.
The function indicates points which are really close to the polygon boundary (but correctly not lying on it) as located on it.
Does anybody know if the inpolygon function automatically creates something like a buffer zone around points, through which nodes might be classified wrong if they are really close to the polygon boundary?
I have added an image where you can see the case I am talking about:
The exact coordinates are as follows:
Upper orange point: Lower Point of the boundary shapefile:
X: 4437431.64953548 X: 4437431.650
Y: 5350649.24495488 Y: 5350649.240
As you can see the coordinates are really close but not identical.
Does anybody know a possibility to obtain the correct result from the inpolygon function even when the upper point is only 0.1 mm away from the boundary polygon?
Thanks in advance!