I am using tilecache with mapserver to serve map tiles. I seem to be having a
problem because my geometry column is not named 'geom'. Below is my mapfile
exerpt and the error message. You can see the the SQL that is built is not
correct. I did some digging in the source code and found the lines I think are
the culprit. I have also included these below.
Mapfile Exerpt
CONNECTIONTYPE postgis
CONNECTION "dbname='gisdb' host='localhost' port=5432 user='webuser'
password='*********' sslmode=disable"
DATA 'shape FROM "maps_parcel" USING UNIQUE id USING srid=4326'
ERROR
An error occurred: msDrawMap(): Image handling error. Failed to draw layer
named 'parcels'.
msPostGISLayerWhichShapes(): Query error. Error (ERROR: column "shape" does
not exist
LINE 1: ..."color",encode(AsBinary(force_collection(force_2d("shape")),...
^
) executing query: select
"id","color",encode(AsBinary(force_collection(force_2d("shape")),'NDR'),'hex')
as geom,"id" from "maps_parcel" where shape &&
GeomFromText('POLYGON((-97.4212539097114 31.0482371048694,-97.4212539097114
31.0529247835391,-97.4157822026614 31.0529247835391,-97.4157822026614
31.0482371048694,-97.4212539097114 31.0482371048694))',4326)
File "/srv/ve/two-release/lib/python2.6/site-packages/TileCache/Service.py",
line 303, in wsgiHandler
format, image = service.dispatchRequest( fields, path_info, req_method,
host )
File "/srv/ve/two-release/lib/python2.6/site-packages/TileCache/Service.py",
line 208, in dispatchRequest
return self.renderTile(tile, params.has_key('FORCE'))
File "/srv/ve/two-release/lib/python2.6/site-packages/TileCache/Service.py",
line 138, in renderTile
data = layer.render(tile, force=force)
File "/srv/ve/two-release/lib/python2.6/site-packages/TileCache/Layer.py",
line 444, in render
return self.renderTile(tile)
File
"/srv/ve/two-release/lib/python2.6/site-packages/TileCache/Layers/MapServer.py",
line 51, in renderTile
mapImage = wms.draw()
File "/srv/ve/two-release/lib/python2.6/site-packages/mapscript.py", line
1466, in draw
def draw(*args): return _mapscript.mapObj_draw(*args)
Links are to trac source code
1612 - from msPostGISBuildSQLItems
It aliases all geom columns to 'geom'
1861 - from msPostGISBuildSQLWhere
It builds the BBOX part of the where clause with the geom column from the
config file
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