The project I'm working on has been mapping ecological sites in ArcGIS on a quad-by-quad basis for the past 10 years. When entered into GIS, each quad has its own shapefile and the sites are cut off at the quad boundary and start up again on the next quad shapefile.
As you can imagine, after 30 different quads have been mapped, it is a pain to view the project as a whole because all 30 shapefiles have to be added to the map individually.
Currently, I am working on combining all of the data into one shapefile. It's easy enough to copy all of the quads into one file, but now there are still quad boundaries on the map dividing what should be single polygons that are just on different quads. Unfortunately, there are no unique values in the table to dissolve on.
How can I dissolve the boundaries between the adjacent shapefiles?