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AddXY (v1.0) is an ArcView extension that should work with ArcView 3.0 and later. It adds the X and Y values of points (shapefiles or coverages) to their attribute tables. It adds the X and Y values of polygon centroids (shapefiles or coverages) to their attribute tables. It will add the X and Y value of a polygon’s labelpoint to its attribute table. Due to a bug in ArcView, it does not work consistently with node coverages, so this has been removed. The X and Y columns in the attribute table should be created with the same names and precision that the ARC/INFO command “addxy” would create.