[MapProxy] Output colors always reduced with PNG24 source
David Pavlíček
pavlicek.david at gmail.com
Mon Apr 1 09:35:46 PDT 2013
Hi Martin,
sorry for offtopic, but have you tried to use WMTS or TMS source for this
CUZK map instead of WMS? My experiences shows, that wms source for ZM10 not
always works as expected. TMS examles are available at http://tms.cuzk.cz/.
David
2013/3/31 Martin Kokeš <shr3k at typo3-hosting.com>
> **
> Hmm, after many experiments, even with nightly build and Pillow, case
> solved by forcing WMS to:
>
> format: image/png
> transparent: true
>
> And globals to:
>
> formats:
> png24:
> format: image/png
> mode: RGBA
> colors: 0
> transparent: false
> resampling_method: bicubic
>
> Works fine also with:
>
> png8:
> format: image/png
> mode: RGBA
> colors: 256
> resampling_method: bicubic
> encoding_options:
> quantizer: fastoctree
>
> That's really magic. But error
>
> File "/usr/local/lib/python2.7/dist-packages/PIL/ImageSupport2.py", line
> 76, in unpack
> raise ValueError(v)
> ValueError: unpack requires a string argument of length 8
>
> raises from time to time.
>
> Martin
>
> ------------------------------
> *From:* Martin Kokeš [mailto:shr3k at typo3-hosting.com]
> *To:* MapProxy at lists.osgeo.org
> *Sent:* Sun, 31 Mar 2013 14:06:30 +0200
> *Subject:* [MapProxy] Output colors always reduced with PNG24 source
>
>
> Hello list,
>
> I have following config (MP 1.5, PIL from Oliver's source):
> ---
> services:
> demo:
> kml:
> tms:
> wmts:
> wms:
> srs: ["EPSG:900913"]
> image_formats: ["image/png"]
>
> layers:
>
> - name: test1
> title: Test with PNG24 source
> sources: [test1_cache]
> - name: test2
> title: Test with JPEG source
> sources: [test2_cache]
>
> caches:
>
> test1_cache:
> sources: [test1_wms]
> grids: [global_mercator_osm]
> format: png24
> cache:
> type: file
>
> test2_cache:
> sources: [test2_wms]
> grids: [global_mercator_osm]
> format: png24
> cache:
> type: file
>
> sources:
>
> test1_wms:
> type: wms
> req:
> url: http://geoportal.cuzk.cz/WMS_ZM10_PUB/service.svc/get
> layers: GR_ZM10
> format: image/png
> transparent: false
> coverage:
> bbox: [11.214011580382529, 47.964914601259672, 19.407662623095131,
> 51.691664934538636]
> srs: 'EPSG:4326'
> supported_srs: ['EPSG:5514']
> min_scale: 2.5253813613805272
> max_scale: 7576144.0841415804
> http:
> client_timeout: 300
>
> test2_wms:
> type: wms
> req:
> url: http://geoportal.cuzk.cz/WMS_ZM10_PUB/service.svc/get
> layers: GR_ZM10
> format: image/jpeg
> transparent: false
> coverage:
> bbox: [11.214011580382529, 47.964914601259672, 19.407662623095131,
> 51.691664934538636]
> srs: 'EPSG:4326'
> supported_srs: ['EPSG:5514']
> min_scale: 2.5253813613805272
> max_scale: 7576144.0841415804
> http:
> client_timeout: 300
>
> grids:
> global_mercator_osm:
> base: GLOBAL_MERCATOR
> num_levels: 20
>
> globals:
> srs:
> proj_data_dir: "proj_data"
> image:
> paletted: false
> formats:
> png24:
> format: image/png
> mode: RGB
> colors: 0
> transparent: false
> resampling_method: bicubic
> ---
> This is source request for test1:
>
> http://geoportal.cuzk.cz/WMS_ZM10_PUB/service.svc/get?styles=&format=image%2Fpng&height=1184&bbox=-742076.617816,-1045120.38486,-741052.456103,-1044098.3743&transparent=False&layers=GR_ZM10&service=WMS&width=1186&request=GetMap&srs=EPSG%3A5514&version=1.1.1
>
> Sometimes I become this error:
> [2013-03-31 13:59:19,391] mapproxy.wsgiapp - CRITICAL - fatal error in tms
> for /tms/1.0.0/test1_EPSG900913/16/70795/86663.png
> Traceback (most recent call last):
> File "/usr/local/lib/python2.7/dist-packages/mapproxy/wsgiapp.py", line
> 166, in __call__
> resp = self.handlers[handler_name].handle(req)
> File "/usr/local/lib/python2.7/dist-packages/mapproxy/service/base.py",
> line 30, in handle
> return handler(parsed_req)
> File "/usr/local/lib/python2.7/dist-packages/mapproxy/service/tile.py",
> line 74, in map
> tile = layer.render(tile_request,
> use_profiles=tile_request.use_profiles, coverage=limit_to)
> File "/usr/local/lib/python2.7/dist-packages/mapproxy/service/tile.py",
> line 265, in render
> tile = self.tile_manager.load_tile_coord(tile_coord,
> with_metadata=True)
> File "/usr/local/lib/python2.7/dist-packages/mapproxy/cache/tile.py",
> line 105, in load_tile_coord
> created_tiles = creator.create_tiles([tile])
> File "/usr/local/lib/python2.7/dist-packages/mapproxy/cache/tile.py",
> line 227, in create_tiles
> created_tiles = self._create_meta_tiles(meta_tiles)
> File "/usr/local/lib/python2.7/dist-packages/mapproxy/cache/tile.py",
> line 300, in _create_meta_tiles
> created_tiles.extend(self._create_meta_tile(meta_tile))
> File "/usr/local/lib/python2.7/dist-packages/mapproxy/cache/tile.py",
> line 309, in _create_meta_tile
> meta_tile_image = self._query_sources(query)
> File "/usr/local/lib/python2.7/dist-packages/mapproxy/cache/tile.py",
> line 274, in _query_sources
> return self.sources[0].get_map(query)
> File "/usr/local/lib/python2.7/dist-packages/mapproxy/source/wms.py",
> line 62, in get_map
> resp = self._get_map(query)
> File "/usr/local/lib/python2.7/dist-packages/mapproxy/source/wms.py",
> line 81, in _get_map
> return self._get_transformed(query, format)
> File "/usr/local/lib/python2.7/dist-packages/mapproxy/source/wms.py",
> line 124, in _get_transformed
> query.size, dst_bbox, self.image_opts)
> File
> "/usr/local/lib/python2.7/dist-packages/mapproxy/image/transform.py", line
> 91, in transform
> result = self._transform(src_img, src_bbox, dst_size, dst_bbox,
> image_opts)
> File
> "/usr/local/lib/python2.7/dist-packages/mapproxy/image/transform.py", line
> 156, in _transform
> image_filter[image_opts.resampling])
> File "/usr/local/lib/python2.7/dist-packages/PIL/Image.py", line 1629,
> in transform
> im.__transformer(box, self, QUAD, quad, resample, fill)
> File "/usr/local/lib/python2.7/dist-packages/PIL/Image.py", line 1674,
> in __transformer
> image.load()
> File "/usr/local/lib/python2.7/dist-packages/PIL/ImageFile.py", line
> 212, in load
> s = read(self.decodermaxblock)
> File "/usr/local/lib/python2.7/dist-packages/PIL/PngImagePlugin.py",
> line 401, in load_read
> cid, pos, len = self.png.read()
> File "/usr/local/lib/python2.7/dist-packages/PIL/PngImagePlugin.py",
> line 93, in read
> len, cid = self.fp.get("!I4s")
> File "/usr/local/lib/python2.7/dist-packages/PIL/ImageSupport2.py", line
> 105, in get
> return self.read(struct.calcsize(fmt)).unpack(fmt)
> File "/usr/local/lib/python2.7/dist-packages/PIL/ImageSupport2.py", line
> 76, in unpack
> raise ValueError(v)
> ValueError: unpack requires a string argument of length 8
> Traceback (most recent call last):
> File "/usr/local/lib/python2.7/dist-packages/mapproxy/wsgiapp.py", line
> 166, in __call__
> resp = self.handlers[handler_name].handle(req)
> File "/usr/local/lib/python2.7/dist-packages/mapproxy/service/base.py",
> line 30, in handle
> return handler(parsed_req)
> File "/usr/local/lib/python2.7/dist-packages/mapproxy/service/tile.py",
> line 74, in map
> tile = layer.render(tile_request,
> use_profiles=tile_request.use_profiles, coverage=limit_to)
> File "/usr/local/lib/python2.7/dist-packages/mapproxy/service/tile.py",
> line 265, in render
> tile = self.tile_manager.load_tile_coord(tile_coord,
> with_metadata=True)
> File "/usr/local/lib/python2.7/dist-packages/mapproxy/cache/tile.py",
> line 105, in load_tile_coord
> created_tiles = creator.create_tiles([tile])
> File "/usr/local/lib/python2.7/dist-packages/mapproxy/cache/tile.py",
> line 227, in create_tiles
> created_tiles = self._create_meta_tiles(meta_tiles)
> File "/usr/local/lib/python2.7/dist-packages/mapproxy/cache/tile.py",
> line 300, in _create_meta_tiles
> created_tiles.extend(self._create_meta_tile(meta_tile))
> File "/usr/local/lib/python2.7/dist-packages/mapproxy/cache/tile.py",
> line 309, in _create_meta_tile
> meta_tile_image = self._query_sources(query)
> File "/usr/local/lib/python2.7/dist-packages/mapproxy/cache/tile.py",
> line 274, in _query_sources
> return self.sources[0].get_map(query)
> File "/usr/local/lib/python2.7/dist-packages/mapproxy/source/wms.py",
> line 62, in get_map
> resp = self._get_map(query)
> File "/usr/local/lib/python2.7/dist-packages/mapproxy/source/wms.py",
> line 81, in _get_map
> return self._get_transformed(query, format)
> File "/usr/local/lib/python2.7/dist-packages/mapproxy/source/wms.py",
> line 124, in _get_transformed
> query.size, dst_bbox, self.image_opts)
> File
> "/usr/local/lib/python2.7/dist-packages/mapproxy/image/transform.py", line
> 91, in transform
> result = self._transform(src_img, src_bbox, dst_size, dst_bbox,
> image_opts)
> File
> "/usr/local/lib/python2.7/dist-packages/mapproxy/image/transform.py", line
> 156, in _transform
> image_filter[image_opts.resampling])
> File "/usr/local/lib/python2.7/dist-packages/PIL/Image.py", line 1629,
> in transform
> im.__transformer(box, self, QUAD, quad, resample, fill)
> File "/usr/local/lib/python2.7/dist-packages/PIL/Image.py", line 1674,
> in __transformer
> image.load()
> File "/usr/local/lib/python2.7/dist-packages/PIL/ImageFile.py", line
> 212, in load
> s = read(self.decodermaxblock)
> File "/usr/local/lib/python2.7/dist-packages/PIL/PngImagePlugin.py",
> line 401, in load_read
> cid, pos, len = self.png.read()
> File "/usr/local/lib/python2.7/dist-packages/PIL/PngImagePlugin.py",
> line 93, in read
> len, cid = self.fp.get("!I4s")
> File "/usr/local/lib/python2.7/dist-packages/PIL/ImageSupport2.py", line
> 105, in get
> return self.read(struct.calcsize(fmt)).unpack(fmt)
> File "/usr/local/lib/python2.7/dist-packages/PIL/ImageSupport2.py", line
> 76, in unpack
> raise ValueError(v)
> ValueError: unpack requires a string argument of length 8
>
> ...but second request gets through.
>
> This is source request for test2:
>
> http://geoportal.cuzk.cz/WMS_ZM10_PUB/service.svc/get?styles=&format=image%2Fjpeg&height=1184&bbox=-742076.617816,-1045120.38486,-741052.456103,-1044098.3743&transparent=False&layers=GR_ZM10&service=WMS&width=1186&request=GetMap&srs=EPSG%3A5514&version=1.1.1
>
> Results are 256 color PNG in test1 (transformed looks not very well), and
> 16M color PNG in test2 (looks nice).
>
> Is there other way to force MapProxy to work always in 24 bit with PNG24
> source?
>
> Martin
>
>
> _______________________________________________
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> MapProxy at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/mapproxy
>
>
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