How can I create polygon of gaps/holes if I have several shapefiles. Do I really have to merge all layers, it it big amount of data (NEW YORK roadbed, buildings, water,parks etc)
I have ET geowizards to clean polygons or create gaps but I can only choose one layer. Merging all layers takes so long time.
maybe it is another way? erasing, clip with an background layer?.
Union with no gaps allowed worked but i need to be able to symbolize the gap polygon and i need to be able to select individual gap polygons.