What happens if you use tiffcp to create a tiled raster? tiffcp -t your-input.tif your-tiled-raster.tif
Then manually set the lox,loy, hix,hiy bounds in your mapnik file and use the raster input instead of gdal? I was having a similar gdal issue and artem suggested using the raster input which is working much better for me. Your datasource should look something like: <Datasource> <Parameter name="type">raster</Parameter> <Parameter name="file">/mapnik/data/raster/your-tiled-raster.tif</Parameter> <Parameter name="lox">1113148.557</Parameter> <Parameter name="loy">6446203.745</Parameter> <Parameter name="hix">1669798.557</Parameter> <Parameter name="hiy">6446203.745</Parameter> </Datasource> From there you can split your geotiff into as many layers as you see fit. I ended up using openlayers and the moveend event to fire off a function that gets the appropriate layers for the current bounding box so I'm not loading too many layers at once. Hope this helps, Matt On Tue, Dec 2, 2008 at 2:01 AM, Jürgen Spille <[EMAIL PROTECTED]> wrote: > > > Hi, > > Peter, thanks for your hint. I tried to split the tiff into small pieces. But > also no success. > > Here is the gdalinfo of my first, big GTiff: > Driver: GTiff/GeoTIFF > Files: srtm_39_03_900913_hillshade.tif > Size is 18555, 27490 > Coordinate System is: > PROJCS["unnamed", > GEOGCS["unnamed ellipse", > DATUM["unknown", > SPHEROID["unnamed",6378137,0]], > PRIMEM["Greenwich",0], > UNIT["degree",0.0174532925199433]], > PROJECTION["Mercator_1SP"], > PARAMETER["central_meridian",0], > PARAMETER["scale_factor",1], > PARAMETER["false_easting",0], > PARAMETER["false_northing",0], > UNIT["metre",1, > AUTHORITY["EPSG","9001"]]] > Origin = (1113148.557154602400000,6446203.744899881100000) > Pixel Size = (30.000000000000000,-30.000000000000000) > Metadata: > AREA_OR_POINT=Area > Image Structure Metadata: > INTERLEAVE=BAND > Corner Coordinates: > Upper Left ( 1113148.557, 6446203.745) ( 9d59'58.50"E, 49d59'58.50"N) > Lower Left ( 1113148.557, 5621503.745) ( 9d59'58.50"E, 44d59'59.59"N) > Upper Right ( 1669798.557, 6446203.745) ( 15d 0'0.20"E, 49d59'58.50"N) > Lower Right ( 1669798.557, 5621503.745) ( 15d 0'0.20"E, 44d59'59.59"N) > Center ( 1391473.557, 6033853.745) ( 12d29'59.35"E, 47d33'33.59"N) > Band 1 Block=18555x1 Type=Byte, ColorInterp=Gray > NoData Value=32767 > > and here the gdalinfo of one of the small pieces: > Driver: GTiff/GeoTIFF > Files: srtm_39_03_900913_hillshade_oa.tif > Size is 1812, 1976 > Coordinate System is: > PROJCS["unnamed", > GEOGCS["unnamed ellipse", > DATUM["unknown", > SPHEROID["unnamed",6378137,0]], > PRIMEM["Greenwich",0], > UNIT["degree",0.0174532925199433]], > PROJECTION["Mercator_1SP"], > PARAMETER["central_meridian",0], > PARAMETER["scale_factor",1], > PARAMETER["false_easting",0], > PARAMETER["false_northing",0], > UNIT["metre",1, > AUTHORITY["EPSG","9001"]]] > Origin = (1114078.557154602400000,6054943.744899881100000) > Pixel Size = (30.000000000000000,-30.000000000000000) > Metadata: > AREA_OR_POINT=Area > Image Structure Metadata: > INTERLEAVE=BAND > Corner Coordinates: > Upper Left ( 1114078.557, 6054943.745) ( 10d 0'28.58"E, 47d41'13.28"N) > Lower Left ( 1114078.557, 5995663.745) ( 10d 0'28.58"E, 47d19'38.31"N) > Upper Right ( 1168438.557, 6054943.745) ( 10d29'46.54"E, 47d41'13.28"N) > Lower Right ( 1168438.557, 5995663.745) ( 10d29'46.54"E, 47d19'38.31"N) > Center ( 1141258.557, 6025303.745) ( 10d15'7.56"E, 47d30'26.91"N) > Band 1 Block=1812x4 Type=Byte, ColorInterp=Gray > NoData Value=32767 > > > The SRS of my map is: > > <Map srs="+proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 > +y_0=0 +k=1.0 +units=m [EMAIL PROTECTED] +no_defs +over"> > > I generate the map with TileCache and the hillshading was generated using the > instructions of this site: > http://wiki.openstreetmap.org/wiki/HikingBikingMaps#Hill_Shading > > My idea was, to merge all my DEM-tiles (covering almost whole Europe) to a > BigTiff and then generate one big shaded relief with pyramids, one for every > zoomlevel. I want to avoid using dozens of layers only for the shading. Is > that a wrong way? I liked the possibility to use an image mosaic in Mapserver > or Geoserver. I didn't found a similar way together with gdal. > > regards > Jürgen > > > -------- Original Message -------- > Subject: Re: [Mapnik-users] Problems with raster data (01-Dez-2008 21:57) > From: BP <[EMAIL PROTECTED]> > To: [EMAIL PROTECTED] > >> Hi! >> >> I'm a newbee working on a project to make a good looking map based on >> turistautak.hu database (it is about hiking trails). It is still under >> development on a temporary site. (peterbus.extra.hu/tuhu) >> Anyway I had the same problem. The GeoTiff was too big. >> My solution was to slice it up (or merge smaller bounds from srtm) and >> feed in several layers. >> At least it worked for me. (It is not uploaded yet to the site) >> >> Regards >> Peter >> >> spillocaster írta: >> > Hi all, >> > >> > I was testing now a couple of hours, but I can't find the problem. I simply >> > want to display a shading with a GeoTiff, but it doesn't work. >> > >> > My XML-Style: >> > <Style name="raster"> >> > <Rule> >> > <RasterSymbolizer> >> > </RasterSymbolizer> >> > </Rule> >> > </Style> >> > >> > My Layer: >> > <Layer name="shading" status="on" srs="+proj=merc +a=6378137 +b=6378137 >> > +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m [EMAIL PROTECTED] >> > +no_defs +over"> >> > <StyleName>raster</StyleName> >> > <Datasource> >> > <Parameter name="type">gdal</Parameter> >> > <Parameter >> > name="file">/mapnik/data/raster/39_03_900913_hillshade.tif</Parameter> >> > <Parameter name="format">tiff</Parameter> >> > </Datasource> >> > </Layer> >> > >> > My system: >> > Debian-linux 2.6.24-etchnhalf.1-686 >> > >> > My map projection is in spherical mercator and so I warped my rasterfile >> > also to the same srs. With "tiffinfo" on my GeoTiff, I get this info: >> > >> > TIFFReadDirectory: Warning, Unknown field with tag 33550 (0x830e) >> > encountered. >> > TIFFReadDirectory: Warning, Unknown field with tag 33922 (0x8482) >> > encountered. >> > TIFFReadDirectory: Warning, Unknown field with tag 34735 (0x87af) >> > encountered. >> > TIFFReadDirectory: Warning, Unknown field with tag 34736 (0x87b0) >> > encountered. >> > TIFFReadDirectory: Warning, Unknown field with tag 34737 (0x87b1) >> > encountered. >> > TIFFReadDirectory: Warning, Unknown field with tag 42113 (0xa481) >> > encountered. >> > TIFF Directory at offset 0x1e6a83b8 (510297016) >> > Image Width: 18555 Image Length: 27490 > > > To: [EMAIL PROTECTED] > Cc: [email protected] > _______________________________________________ > Mapnik-users mailing list > [email protected] > https://lists.berlios.de/mailman/listinfo/mapnik-users > _______________________________________________ Mapnik-users mailing list [email protected] https://lists.berlios.de/mailman/listinfo/mapnik-users
