There's no viable tiling standard that supports multiple
The proj4/epsg standard for referring to projections isn't very
good and there's no viable replacement
Only one (OpenLayers) of our supported clients supports any
projection besides EPSG:900913
Since there's no standard for tiling projections, there's no
standard set of zoom resolutions, and thus nothing for our styling
language to hook onto for making cross-projection styles
There's no standard for identifying map projections to
different clients and cleanly failing then those projections aren't
So, in short, for many deep reasons.
You might want to try different resampling schemes in gdalwarp,
or hunting down higher-res source data.
TileMill calls its projection EPSG:900913. The numbers are
interchangeable, and some of them are caused by (gasp) mispellings,
rather than any consensus. If they're done correctly, they're
identical and there's no best amongst them, so we call it the most
I have been creating huge tile caches (>30million tiles)
using geowebcache and moving them around! Yes its as bad as it
sounds! We overwrite the normal projection and resolutions by using
a geowebcache.xml (essentially a configuration file if you are not
familiar). Gives us control of the projection, the tile size and
But it would be great to move to a mbtile type environment, so
we dont have problems moving tile caches around.
Ok will specify EPSG:900913 when I gdalwarp. I have just
stumbled across that i can gdalwarp to a VRT and then do a
gdal_translate on the VRT to GeoTIFF with COMPRESS=LZW, which is
Now if i could just add a Geotiff that is bigger than 100mb
Last one, i see gdal 2.0 will support MBTiles, anyone know when
this might be avaliable more than happy to help test
Heh, 30 million tiles - that's quite a few. Luckily if you're
going the MBTiles route, we've been doing some similarly-sized
tilesets and not running into any size limitations. Other than disk
space, of course.
Yep - not sure when builds of GDAL 2.0 will start coming out,
but it'll be awesome, and hopefully let us deprecate tools like
raster2mb for a much, much more powerful solution.