This executable will compare vector archives and output the differences as well as a union of both inputs. We establish one as the new and the other as the old archive and output appearances, disappearances, and union archives.

Execute with:

./compareRecords <oldArchivePath> <newArchivePath> <attributeName> <outputPath>

Records that appear in the new archive and not in the old will be designated as appearances.
Records that appear in the old archive and not in the new will be designated as disappearances.
The attribute name is the field name in the attribute table by which you would like to make the comparison. This value should be unique for each record.
outputPath will be the location where outputs will be written. They will be named :
- appearances.shp
- disappearances.shp
- union.shp