2009/10/21 Sam Vekemans <[email protected]>: > to: imports@ list > There ought to be a way that shp files can be 1st 'sliced'.. > Ie. (Geographically cut into an arbitrary grid (regardless of the shape of > the polygon) 4, 16, 256 or whatever size) so then each square can be dealt > with independently. > .... ya i know it can be done with ArchGIS, but were looking for a command > line alternative :)... Also, slicing AFTER processing will help too. Is > that something that osmosis can do?
Kind of, it can extract a part of a .osm file inside a rectangle using the --bb switch, so by running osmosis for each grid cell you can slice a big rectangle into smaller rectangles. However when a way or relation crosses the grid cell boundary, osmsis will either include all such ways or none of them, depending on the options you give it. As a result you will either have missing ways or have duplicates across your slices. If we only had ways and nodes, it would be possible to split ways by inserting a new node at the boundary and clipping to it, but with relations I'm not sure how that could be done sensibly. Cheers _______________________________________________ Imports mailing list [email protected] http://lists.openstreetmap.org/listinfo/imports
