Just wanted to update this post with a workaround i found. Rather than trying to force Manifold to do the reprojection to srid 900913 on export to postgres, i kept it simple by exporting the unprojected map info to srid 4326 (wgs84). I then rewrote my mapnik scripts to take advantage of that srs (instead of the 900913 examples from osm). That did the trick for now and i am happily looking at a rendered map of my 'fake island'
I'll try doing a spatial transformation of the data inside the db later to see if i can get the projected map version to work too. -will wclapham wrote: > > Hello all - I'm a relative newbie/first time poster looking for a little > help. I've been trying to do something a little unorthodox here in the > world of GIS, using a combination of tools (Manifold Enterprise 8.0.12 + > postgres 8.3.5/postgis db + mapnik 0.6) to draw a fictional world, and > find > myself beating my head on the desk when i keep drawing blank maps. > > Here's the overview scoop: I have a *fictional*, geo-located environment > stored in a Manifold System .map file. It was imported from a group of > .SHP > files which had been exported out of MAPublisher and then expanded upon. I > am now trying to export the drawing to a postgres/gis db (mimicking what > the > OpenStreetMaps project has done for real world data) so that i can connect > to and draw maps/maptiles dynamically using Mapnik. > > Since this project uses a number of steps outside the 'normal' use of > Manifold and/or Mapnik, I'm at a total loss as to what the problem is. I > dont know if the breakdown is in Manifold, my Postgres setup, Mapnik (or a > combo of all). I wish there was just a straight forward tutorial to walk > thru, but i'm kinda making it up as i go along. Has anyone else out there > tried something like this with any relative success? I've read a few great > posts here, and in the Manifold community, which has shed more light on a > few things, but nothing has completely solved the issue. I am open to any > and all suggestions as I've been pounding on this for months now. > > Also, is there a way to build mapnik in windows to run in debug mode? i'm > kinda flying blind with no feedback. > > --Some quick facts: > > The environment envelope (in LatLong) is 0, 0, 0.375, 0.375 and I've > tried > exporting to postgres using WGS84/ll as well as projecting it to Mercator > (then re-projecting it to the specific SRID in my spatial_ref_sys). > > If i export everything to unprojected local SHP files from manifold, > Mapnik > will draw everything just fine. > > Also on the mapnik side, i can draw real world OpenStreetMap data from > our > postgres/gis db just fine, using the standard generate_tiles.py / xml > mapfile combo. > > I have been using the same python script / mapfile combo for my fictional > data and simply changing the postgis db info to my own, and the render > envelope to fit my area. (i've been using the native extent bounds for the > given srs) > > After an export to the postgres/gis db, i can view my fictional world > data > in Safe FME, and QGIS (so it's technically *there*)...but projections > cannot > be verified, and mapnik wont draw it. > > -- > > Sorry for the such a long/problem-filled first post, but on the off-chance > that anyone out there has had some success with this...i'd love to hear > what > you came up with. I know i must be missing something simple...but > grrrrrr, > i dont know what! ;) > > Thanks a ton in advance for any advice! > -will > -- > “The opposite of play isn’t work. It’s depression.” > – Brian Sutton-Smith, professor of eduction (emeritus) University of > Pennsylvania > > _______________________________________________ > Mapnik-users mailing list > [email protected] > https://lists.berlios.de/mailman/listinfo/mapnik-users > > -- View this message in context: http://www.nabble.com/Help-rendering-image-with-manifold-%2B-mapnik-combo-tp23731556p23788032.html Sent from the Mapnik - Users mailing list archive at Nabble.com. _______________________________________________ Mapnik-users mailing list [email protected] https://lists.berlios.de/mailman/listinfo/mapnik-users
