> In my idea staying with the algebra functions should be doable, even > with complex speckles. > As long as the mask is big enough (finding speckles of max N pixels > takes a 2N x 2N matrix) one should be able to run a neighbourhood scan > outwards from the centre pixel. With some smart iterations that might > work, I just need to start learning plpsql or something... > Would you agree that that kind of method would be faster than vectorizing?
I can't answer this as I haven't played much with ST_MapAlgebraFctNgb.. It all depends on the size of the window. Give it a try! plpgsql is very easy and you can start from the example in the doc. Pierre _______________________________________________ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users
