I have several shp files which are the components (or tiles) of a map, I have joint all these tiles together to have a large shp file. Then I realized some of the polygon is now splitted into 2 halves, as the upper part belngs to a tile, while the lower part belongs to another tile.
This output disturb me a lot as I need to fill some polygon, but not part of the "splitted polygon", so I need to find a way to merge these splitted polygon back to one (preferrably mechanical way, as I have 10000+ polygons, not knowing which are splitted, which are not).
I need to know if the two or more polygons orginate from the larger polygon. And I think I can some how use union and spRbind to create an algorithm for this task. But I doubt if I am really the first one who encounter this problem, so I wonder if there is any existing tool in R that can solve this problem.