I have a process whereby I create points from 2 different polygon feature classes and then compare whether the polygons have moved or changed shape based on XY coordinates of the point feature classes. To do this I use the Feature to Point tool (Data Management/Features) and set it to place the point inside the polygon.

In ArcGIS 9.3.1 the points would be placed in the center of the polygon. In ArcGIS 10 (sp4) the points seems to be placed almost anywhere in the polygon. Therefore if I add XY coordinates and compare the two new point feature classes the comparison finds points with differentiating XY coordinates but the polygons haven't changed.

Is there a way to get the feature to point tool to place the point in the center of a polygon? Or is there another tool? Any ideas are welcome.

thanks in advance

.... and for the heck of it I just tried NOT checking "inside" and voila, the points are in the middle of the polygon. Rather bassackwards and not-intuitive....

In ArcGIS 9.3.1 the points would be placed in the center of the polygon. In ArcGIS 10 (sp4) the points seems to be placed almost anywhere in the polygon. Therefore if I add XY coordinates and compare the two new point feature classes the comparison finds points with differentiating XY coordinates but the polygons haven't changed.

Is there a way to get the feature to point tool to place the point in the center of a polygon? Or is there another tool? Any ideas are welcome.

thanks in advance

.... and for the heck of it I just tried NOT checking "inside" and voila, the points are in the middle of the polygon. Rather bassackwards and not-intuitive....

Again, depending on polygon shape, for the Inside option, it may not be always true that the point is both inside and at the center.

We made some improvement on the location of the point for the Inside option in ArcGIS 10. You may see the differences between 9.3.1 result and 10 result; hopefully the 10 result is better overall. So for the comparison, you should use the same software version to process original polygons and the moved/changed polygons using the same Inside or Centroid option. If no shape change happens, the resulting points should be at the same inside or centroid locations relative to the polygons. If the polygon shape changed, then the point locations will change; it may not be a reliable comparison.

Help this helps you better understand the tool.