[OSM-dev] tile issue (was: Re: convert tool)

[Dominik Spies]

Richard Duivenvoorde wrote:

> on debian it's in the package 'imagemagick', don't know the footprint of 
> that package though. But it has a lot of dependencies (with X11) etc etc.

hm, same thing. about 100MB on disk storage.

Jon Burgess wrote:

 > 	view.save(tile_uri,'png256')

works fine!
I'll use this for now.

Another issue I ran into is really odd:

There are large areas without anything on the tiles, and the area is 
somehow moved to northeast (what explains the empty areas, because there 
is no data for them).
Also, a tile e.g. http://10.10.11.102/tiles/12/2193/1413.png shows part 
of motorway A92 near Plattling. When I requets this tile from 
openstreetmap (http://a.tile.openstreetmap.org/12/2193/1413.png) I shows 
another area, ~ 25km northwest.

What could be the reason for that? Thats what I did:


I downloaded a certain area with:
http://api.openstreetmap.org/api/0.5/map?bbox=12.322,48.471,12.981,48.796
I transfered it into pgsql (psql 8.2.7) with svn version of osm2pgsql. 
worked fine:

postgres at vmub804:/home/dosp/osm2pgsql/osm2pgsql$ osm2pgsql -d osm 
../../lkdgf.osm
osm2pgsql SVN version 0.08-20071112 $Rev: 4842 $

Setting up table: planet_osm_point
Setting up table: planet_osm_line
Setting up table: planet_osm_polygon
Setting up table: planet_osm_roads

Reading in file: ../../lkdgf.osm
Processing: Node(14k) Way(0k) Relation(0k)
Writing way(0k)

Node stats: total(14485), max(271047776)
Way stats: total(788), max(24942067)
Relation stats: total(21), max(17457)

Then I setup mapnik (svn checkout 
http://svn.openstreetmap.org/applications/rendering/mapnik
) by editing the set-mapnik.., source.. and finally editing 
generate_tiles.py to:

bbox = (12.322,48.471,12.981,48.796)
render_tiles(bbox, mapfile, tile_dir, 10, 15, "DGF-Lan")

all other render_tiles commented out.