[mapserver-users] Mapserver 6.2.1 fails to read remote WMS in png format
Rahkonen Jukka
jukka.rahkonen at mmmtike.fi
Thu Apr 25 07:37:24 PDT 2013
Hi,
No trouble at all with gdal_translate that is in gdal-ogr tools of the same MS4W3.1.0beta1. If the error message gives right information then perhaps the trouble is not in the png image which is captured from the remote WMS but in getting access to it
drawGDAL(): Unable to access file. GDALDatasetRasterIO() failed:
GetBlockRef failed at X block offset 0, Y block offset 0
I have no idea why reaging png from the service fails while reading jpeg works.
-Jukka-
Daniel Morissette
> What if you try to gdal_translate it to a TIFF or JPEG for instance?
> Please make sure you use the gdal_translate tool from the exact same
> MS4W package as what your MapServer is using.
>
> Daniel
>
>
> On 13-04-25 10:17 AM, Rahkonen Jukka wrote:
> > Hi,
> >
> > Yes, I have checked that png files saved from both services I have
> > been testing are OK. I know that our own server is using this outputformat
> OUTPUTFORMAT
> > NAME 'AGG_Q'
> > MIMETYPE "image/png"
> > DRIVER "AGG/PNG"
> > EXTENSION "png"
> > IMAGEMODE RGB
> > FORMATOPTION "QUANTIZE_FORCE=ON"
> > FORMATOPTION "QUANTIZE_DITHER=OFF"
> > FORMATOPTION "QUANTIZE_COLORS=256"
> >
> > GDAL 1.10dev understands the saved image this way:
> >
> > E:\>gdalinfo temp.png
> > Driver: PNG/Portable Network Graphics
> > Files: temp.png
> > Size is 459, 353
> > Coordinate System is `'
> > Corner Coordinates:
> > Upper Left ( 0.0, 0.0)
> > Lower Left ( 0.0, 353.0)
> > Upper Right ( 459.0, 0.0)
> > Lower Right ( 459.0, 353.0)
> > Center ( 229.5, 176.5)
> > Band 1 Block=459x1 Type=Byte, ColorInterp=Palette
> > Color Table (RGB with 256 entries)
> > 0: 62,135,124,255
> > 1: 52,108,102,255
> > 2: 46,110,106,255
> > 3: 58,131,122,255
> > 4: 78,153,135,255
> > 5: 50,110,102,255
> > 6: 52,116,106,255
> > 7: 50,108,102,255
> > 8: 54,116,110,255
> > 9: 213,213,201,255
> > 10: 223,247,239,255
> > 11: 66,143,131,255
> > 12: 52,110,106,255
> > 13: 64,139,122,255
> > 14: 76,149,133,255
> > 15: 64,126,116,255
> > 16: 52,124,112,255
> > 17: 54,129,118,255
> > 18: 76,149,124,255
> > 19: 74,141,124,255
> > 20: 82,151,135,255
> > 21: 94,151,135,255
> > 22: 76,143,131,255
> > 23: 82,147,131,255
> > 24: 50,106,102,255
> > 25: 74,151,131,255
> > 26: 74,147,129,255
> > 27: 62,139,124,255
> > 28: 72,141,118,255
> > 29: 44,104,100,255
> > 30: 141,110,116,255
> > 31: 84,151,126,255
> > 32: 94,151,131,255
> > 33: 64,129,120,255
> > 34: 163,143,135,255
> > 35: 46,108,102,255
> > 36: 60,131,120,255
> > 37: 137,102,100,255
> > 38: 88,155,133,255
> > 39: 114,124,112,255
> > 40: 90,126,102,255
> > 41: 110,118,104,255
> > 42: 76,131,118,255
> > 43: 149,133,126,255
> > 44: 88,159,139,255
> > 45: 82,147,124,255
> > 46: 106,151,122,255
> > 47: 100,157,135,255
> > 48: 50,116,110,255
> > 49: 171,145,147,255
> > 50: 145,181,157,255
> > 51: 157,129,126,255
> > 52: 90,141,120,255
> > 53: 90,149,126,255
> > 54: 157,139,135,255
> > 55: 139,122,114,255
> > 56: 161,143,141,255
> > 57: 84,147,122,255
> > 58: 147,112,116,255
> > 59: 100,165,145,255
> > 60: 163,131,133,255
> > 61: 139,108,108,255
> > 62: 76,141,126,255
> > 63: 147,122,118,255
> > 64: 46,106,102,255
> > 65: 72,145,120,255
> > 66: 151,149,135,255
> > 67: 135,124,120,255
> > 68: 84,143,116,255
> > 69: 141,139,131,255
> > 70: 163,165,153,255
> > 71: 135,163,141,255
> > 72: 106,104,96,255
> > 73: 72,149,131,255
> > 74: 177,135,135,255
> > 75: 161,159,147,255
> > 76: 163,149,147,255
> > 77: 82,145,126,255
> > 78: 157,126,133,255
> > 79: 193,159,159,255
> > 80: 100,139,110,255
> > 81: 181,147,149,255
> > 82: 151,122,124,255
> > 83: 141,126,122,255
> > 84: 161,199,175,255
> > 85: 157,177,159,255
> > 86: 177,118,100,255
> > 87: 185,157,157,255
> > 88: 183,161,157,255
> > 89: 169,126,126,255
> > 90: 114,104,102,255
> > 91: 171,159,149,255
> > 92: 151,163,149,255
> > 93: 106,139,120,255
> > 94: 153,183,159,255
> > 95: 171,145,141,255
> > 96: 151,155,147,255
> > 97: 161,124,126,255
> > 98: 151,143,135,255
> > 99: 52,129,116,255
> > 100: 135,155,135,255
> > 101: 124,155,135,255
> > 102: 189,183,173,255
> > 103: 135,102,106,255
> > 104: 96,151,122,255
> > 105: 54,120,112,255
> > 106: 167,139,135,255
> > 107: 139,102,108,255
> > 108: 100,161,137,255
> > 109: 114,92,92,255
> > 110: 171,199,179,255
> > 111: 177,147,147,255
> > 112: 137,135,124,255
> > 113: 171,157,155,255
> > 114: 151,155,141,255
> > 115: 139,163,149,255
> > 116: 108,88,84,255
> > 117: 203,183,173,255
> > 118: 171,167,157,255
> > 119: 179,229,205,255
> > 120: 153,187,167,255
> > 121: 131,92,98,255
> > 122: 183,243,221,255
> > 123: 131,110,112,255
> > 124: 163,181,167,255
> > 125: 179,205,189,255
> > 126: 161,205,183,255
> > 127: 181,189,175,255
> > 128: 175,219,195,255
> > 129: 173,179,167,255
> > 130: 181,175,165,255
> > 131: 179,163,159,255
> > 132: 163,157,151,255
> > 133: 161,217,193,255
> > 134: 161,120,120,255
> > 135: 177,157,151,255
> > 136: 173,187,173,255
> > 137: 139,147,135,255
> > 138: 149,139,133,255
> > 139: 126,88,92,255
> > 140: 161,189,171,255
> > 141: 52,122,112,255
> > 142: 171,151,147,255
> > 143: 145,187,167,255
> > 144: 126,122,114,255
> > 145: 96,98,92,255
> > 146: 131,141,131,255
> > 147: 58,131,120,255
> > 148: 126,147,131,255
> > 149: 173,175,161,255
> > 150: 94,86,82,255
> > 151: 161,153,145,255
> > 152: 167,131,135,255
> > 153: 137,179,153,255
> > 154: 108,76,82,255
> > 155: 122,104,100,255
> > 156: 151,118,120,255
> > 157: 163,171,157,255
> > 158: 163,135,135,255
> > 159: 124,118,108,255
> > 160: 124,137,122,255
> > 161: 80,86,80,255
> > 162: 131,100,100,255
> > 163: 177,139,143,255
> > 164: 161,149,141,255
> > 165: 76,68,70,255
> > 166: 151,118,122,255
> > 167: 137,161,145,255
> > 168: 171,133,135,255
> > 169: 106,72,76,255
> > 170: 82,141,120,255
> > 171: 151,199,173,255
> > 172: 94,70,72,255
> > 173: 157,133,133,255
> > 174: 110,82,82,255
> > 175: 141,120,120,255
> > 176: 94,157,135,255
> > 177: 72,100,96,255
> > 178: 151,112,114,255
> > 179: 143,171,153,255
> > 180: 122,92,98,255
> > 181: 114,98,94,255
> > 182: 114,84,90,255
> > 183: 70,145,126,255
> > 184: 147,116,118,255
> > 185: 149,133,133,255
> > 186: 120,88,90,255
> > 187: 153,171,155,255
> > 188: 129,126,120,255
> > 189: 106,90,90,255
> > 190: 86,151,135,255
> > 191: 139,116,112,255
> > 192: 135,171,149,255
> > 193: 84,157,135,255
> > 194: 129,110,106,255
> > 195: 58,126,118,255
> > 196: 92,139,110,255
> > 197: 151,145,141,255
> > 198: 72,139,120,255
> > 199: 171,135,141,255
> > 200: 141,108,112,255
> > 201: 76,149,129,255
> > 202: 163,137,141,255
> > 203: 58,122,114,255
> > 204: 171,141,143,255
> > 205: 157,120,124,255
> > 206: 135,153,141,255
> > 207: 153,126,131,255
> > 208: 62,137,122,255
> > 209: 84,139,110,255
> > 210: 149,126,126,255
> > 211: 90,147,120,255
> > 212: 147,106,110,255
> > 213: 124,98,98,255
> > 214: 126,104,106,255
> > 215: 82,151,131,255
> > 216: 82,155,131,255
> > 217: 46,104,100,255
> > 218: 82,141,126,255
> > 219: 42,102,98,255
> > 220: 48,116,108,255
> > 221: 44,114,106,255
> > 222: 68,147,129,255
> > 223: 86,149,131,255
> > 224: 58,120,112,255
> > 225: 163,126,131,255
> > 226: 72,147,124,255
> > 227: 48,114,106,255
> > 228: 56,131,118,255
> > 229: 74,139,114,255
> > 230: 46,102,98,255
> > 231: 54,126,116,255
> > 232: 50,110,106,255
> > 233: 68,141,129,255
> > 234: 58,135,124,255
> > 235: 66,139,126,255
> > 236: 78,153,131,255
> > 237: 70,143,124,255
> > 238: 58,116,110,255
> > 239: 40,98,96,255
> > 240: 52,124,116,255
> > 241: 60,122,114,255
> > 242: 42,104,100,255
> > 243: 44,110,104,255
> > 244: 54,116,108,255
> > 245: 82,143,131,255
> > 246: 66,143,129,255
> > 247: 64,137,118,255
> > 248: 62,137,124,255
> > 249: 60,135,122,255
> > 250: 48,120,112,255
> > 251: 62,139,126,255
> > 252: 54,112,106,255
> > 253: 56,133,122,255
> > 254: 46,108,102,255
> > 255: 255,255,255,255
> >
> > -Jukka-
> >
> >
> > Daniel Morissette wrote:
> >>
> >> Hi Jukka,
> >>
> >> IIRC, a few releases ago (not sure if that was in 6.0 or before) we
> >> got rid of all native raster reading code in MapServer and started
> >> relying solely on GDAL for raster input. i.e. before that we used to
> >> read PNG input directly in MapServer code using libpng, and now we do
> >> it through GDAL. That could possibly explain why you get different
> >> behaviors, but doesn't explain why your PNG cannot be read by GDAL.
> >>
> >> Two things to check:
> >>
> >> 1- Does the image/png request captured from the logs work from the
> >> server machine (using wget for instance)? Does it return a valid PNG
> image?
> >>
> >> 2- Save the output of that request with a command such as "wget
> >> https://... - O /tmp/test.png" and try running gdalinfo on the output.
> >> Maybe that will give some hints.
> >>
> >> Daniel
> >>
> >>
> >> On 13-04-25 8:05 AM, Rahkonen Jukka wrote:
> >>> Hi,
> >>>
> >>> I was testing Mapserver 6.2.1 from the MS4W 3.0.1beta-1 installation
> >>> and
> >> thought that there was something wrong with the connection. However,
> >> the problem seems to be in Mapserver side. I have been using
> >> &FORMAT=image/png for reading the remote WMS with Mapserver 6.0.1
> but
> >> with MS 6.2.1 it does not work. After changing image format into
> >> image/jpeg Mapserver can again cascade the remote WMS.
> >>>
> >>> Part of the errorlog is in the attachment but the most relevant
> >>> parts are here
> >>>
> >>> This request with FORMAT=image/jpeg works
> >>>
> >>> [Thu Apr 25 14:30:24 2013].970000 HTTP request: id=1,
> >>>
> >>
> https://...&FORMAT=image/jpeg&STYLES=&HEIGHT=353&VERSION=1.1.1&S
> >> RS=EPS
> >>>
> >>
> G:3067&WIDTH=459&BBOX=406810.908602495,7216210.70370872,407078.361
> >> 0453
> >>>
> >>
> 37,7216416.39153513&TRANSPARENT=TRUE&EXCEPTIONS=application/vnd.o
> >> gc.se
> >>> _inimage
> >>> ....................
> >>> [Thu Apr 25 14:30:27 2013].354000 msDrawRasterLayerGDAL():
> >>> red,green,blue,alpha bands = 1,2,3,0 [Thu Apr 25 14:30:27
> >>> 2013].372000
> >>> msDrawMap(): Layer 1 (test), 0.022s [Thu Apr 25 14:30:27
> >>> 2013].372000
> >>> msDrawMap(): Drawing Label Cache, 0.000s [Thu Apr 25 14:30:27
> >>> 2013].372000 msDrawMap() total time: 2.408s [Thu Apr 25 14:30:27
> >>> 2013].590000 msSaveImage(stdout) total time: 0.218s [Thu Apr 25
> >>> 14:30:27 2013].592000 mapserv request processing time (msLoadMap
> not
> >>> incl.): 2.629s
> >>>
> >>> This request with FORMAT=image/png does not work
> >>>
> >>> [Thu Apr 25 14:31:13 2013].915000 HTTP request: id=1,
> >>>
> >>
> https://...&FORMAT=image/png&STYLES=&HEIGHT=353&VERSION=1.1.1&SR
> >> S=EPSG
> >>>
> >>
> :3067&WIDTH=459&BBOX=406508.434778249,7215858.43375314,407593.6153
> >> 7966
> >>>
> >>
> 5,7216693.00619824&TRANSPARENT=TRUE&EXCEPTIONS=application/vnd.og
> >> c.se_
> >>> inimage
> >>> .........................
> >>> [Thu Apr 25 14:31:18 2013].349000 msDrawRasterLayerGDAL():
> >>> red,green,blue,alpha bands = 1,0,0,0 [Thu Apr 25 14:31:18
> >>> 2013].349000
> >>> drawGDAL(): Unable to access file. GDALDatasetRasterIO() failed:
> >> GetBlockRef failed at X block offset 0, Y block offset 0 [Thu Apr 25
> >> 14:31:18
> >> 2013].349000 msDrawMap(): WMS connection error. Failed to draw WMS
> >> layer named 'test'. This most likely happened because the remote WMS
> >> server returned an invalid image, and XML exception or another
> >> unexpected result in response to the GetMap request. Also check and
> >> make sure that the layer's connection URL is valid.
> >>> [Thu Apr 25 14:31:18 2013].349000 mapserv request processing time
> >>> (msLoadMap not incl.): 4.441s
> >>>
> >>>
> >>> It looks like GDAL cannot find correct bands from the png output of
> >>> the
> >> remote WMS: " msDrawRasterLayerGDAL(): red,green,blue,alpha bands =
> >> 1,0,0,0". However, Mapserver 6.0.1 with GDAL 1.8 can cascade this
> >> service fine and all my WMS clients work well with the remote WMS by
> >> using image/png format. I made also another test by trying to
> >> cascade our own Mapserver 6.0.1 and the result was the same: if I
> >> read data as image/png remote WMS I get the "GDALDatasetRasterIO()
> failed" error.
> >>>
> >>> I am not sure if this is Mapserver, GDAL or MS4W bug. Any opinions?
> >>>
> >>> -Jukka Rahkonen-
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>> _______________________________________________
> >>> mapserver-users mailing list
> >>> mapserver-users at lists.osgeo.org
> >>> http://lists.osgeo.org/mailman/listinfo/mapserver-users
> >>>
> >>
> >>
> >> --
> >> Daniel Morissette
> >> http://www.mapgears.com/
> >> Provider of Professional MapServer Support since 2000
> >>
> >> _______________________________________________
> >> mapserver-users mailing list
> >> mapserver-users at lists.osgeo.org
> >> http://lists.osgeo.org/mailman/listinfo/mapserver-users
> > _______________________________________________
> > mapserver-users mailing list
> > mapserver-users at lists.osgeo.org
> > http://lists.osgeo.org/mailman/listinfo/mapserver-users
> >
>
>
> --
> Daniel Morissette
> http://www.mapgears.com/
> Provider of Professional MapServer Support since 2000
>
> _______________________________________________
> mapserver-users mailing list
> mapserver-users at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/mapserver-users
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