Vector Overlapping Areas: Difference between revisions
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'''Q:''' How can I determine the number of overlapping features per location after import of SHAPE file? | '''Q:''' How can I determine the number of overlapping features per location after import of SHAPE file? | ||
'''A:''' You can run this (example): | '''A:''' You can run this (example) - note that it won't work with the DBF driver but requires SQLite, PostgreSQL, MySQL, or... driver: | ||
v.in.ogr dsn=./shp/ layer=fireHistory output=fireHistory | v.in.ogr dsn=./shp/ layer=fireHistory output=fireHistory | ||
Revision as of 12:47, 24 June 2008
Q: How can I determine the number of overlapping features per location after import of SHAPE file?
A: You can run this (example) - note that it won't work with the DBF driver but requires SQLite, PostgreSQL, MySQL, or... driver:
v.in.ogr dsn=./shp/ layer=fireHistory output=fireHistory v.category input=fireHistory output=tmpFire v.db.addtable map=tmpFire table=tmpFire_2 layer=2 columns='num,int' v.to.db map=tmpFire layer=2 qlayer=1 option=query col=num qcol='count(*)' type=centroid # Export it to a raster layer: v.to.rast input=tmpFire layer=2 output=mf use=attr column=num