Hi List, (I did send a very similar question to the mapserver list two days ago but I didn't hear any comments or suggestions. This is a problem between mapserver and postgis).
I'm using mapserver to display some rasters as WMS layers using Openlayers. At the moment I have all my rasters in a web-readable folder and it works fine. I want to try accessing the rasters using postgis, but I'm not sure exactly how to do this. I've read through this http://mapserver.org/input/vector/postgis.html and the relevant part of PostGIS in Action. My original map file (which worked) looked like this: LAYER NAME "new_york_pop" DATA "/home//htdocs/data/new_york_pop.tif" STATUS OFF TYPE RASTER METADATA "wms_title" "WMS new_york Raster" "wms_srs" "EPSG:900913" END END I tried changing this to the following: LAYER NAME "new_york_pop" TYPE RASTER CONNECTIONTYPE POSTGIS CONNECTION "host=18.00.00.00 dbname=raster_analysis user=postgres password=mypassword port=5434" DATA "SELECT ST_AsTIFF(ST_Clip(r.rast, 1, p.geom, NULL, TRUE)) FROM us_pop_800 AS r, cities AS p WHERE ST_Intersects(r.rast, p.geom) AND p.name= 'new_york'" STATUS OFF METADATA "wms_title" "WMS new_york Raster" "wms_srs" "EPSG:900913" END END I want to clip my raster to the polygon and to display the clipped raster using a WMS query. The SQL query runs fine within the SQL console of Postgresql and returns a few tiffs, but it does not work on mapserver. My mapserver error log shows the following: [Tue Feb 14 12:16:29 2012].918681 msDrawMap(): Image handling error. Failed to draw layer named 'new_york_pop'. [Tue Feb 14 12:16:29 2012].917535 msDrawMap(): rendering using outputformat named png (AGG/PNG). [Tue Feb 14 12:16:29 2012].918757 msDrawRasterLayerLow(): Unable to access file. Corrupt, empty or missing file 'SELECT ST_AsTIFF(ST_Clip(r.rast, 1, p.geom, NULL, TRUE)) FROM us_pop_raster AS r, cities AS p WHERE ST_Intersects(r.rast, p.geom) AND p.name = 'new_york'' for layer 'new_york_pop'. [Tue Feb 14 12:16:29 2012].918766 msDrawMap(): Image handling error. Failed to draw layer named 'new_york_pop'. I would appreciate any suggestions for debugging this. I have connected to the postgresql database using a php file from the same location so mapserver should have the correct permissions to connect (and my port is 5434, rather than the usual 5432). Thank you, David
_______________________________________________ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users
