Hello everyone, I have a question. I need to do some spatial adjustment on a layer importing from Shapefile. However, because the shapefile doesn't have correct Geographic Coordinate System, I used Define projection to change it to GCS WGS 1984. But when I do that and add a basemap suddenly the layer doesn't appear on the map anymore. It just disappear. If I changed the layer back to unknown GCS, then I can see it again. How can give it right projection and still be able to see it, so I can do some spatial adjustment on it.
Please help me please. This is very important.