[mapserver-users] Images returning blank

[Rahkonen Jukka]

Hi,

I would start by adding EXTENT element at MAP level, see for example
http://www.mapserver.org/introduction.html

-Jukka Rahkonen-


> Kent Morrison wrote:

> I have mapserver 5.4.2 installed.

> I have two different shape files, one renders properly the other only returns blank images

> The debug log for the one that does not work returns:

> [Tue Jan 19 20:34:59 2010].212000 CGI Request 1 on process 1180
[Tue Jan 19 20:34:59 2010].212000 mapserv(): Web application error. No way to generate map extent.
[Tue Jan 19 20:34:59 2010].212000 msCalculateScale(): General error message. Invalid image extent, minx=-1.000000, miny=-1.000000, maxx=-1.000000, maxy=-1.000000.
[Tue Jan 19 20:34:59 2010].212000 msTileSetExtent (-13090872.991896, 6046512.903143) (-13071381.549686, 6066004.345353)
[Tue Jan 19 20:34:59 2010].227000 msDrawMap(): Layer 0 (SpokaneTrafficFlows), 0.000s
[Tue Jan 19 20:34:59 2010].227000 msDrawMap(): Drawing Label Cache, 0.000s
[Tue Jan 19 20:34:59 2010].227000 msDrawMap() total time: 0.015s
[Tue Jan 19 20:34:59 2010].274000 msSaveImage() total time: 0.047s
[Tue Jan 19 20:34:59 2010].274000 mapserv request processing time (loadmap not incl.): 0.062s
[Tue Jan 19 20:34:59 2010].274000 msFreeMap(): freeing map at 01A5AF00.
[Tue Jan 19 20:34:59 2010].274000 freeLayer(): freeing layer at 020E4160.

the map file is:

MAP
    IMAGETYPE AGG
    SIZE 256 256
    SHAPEPATH "/MapServerData/ShapeFiles/1"
    IMAGECOLOR 255 255 255
    TRANSPARENT ON
    FONTSET "../../fonts/fonts.list"

CONFIG PROJ_LIB "c:\ms4w\proj\nad\"
CONFIG MS_ERRORFILE "c:\ms4w\tmp\errors2.txt"
DEBUG 5

    PROJECTION
        "init=epsg:4326"
    END

    OUTPUTFORMAT
        NAME 'AGG'
        DRIVER AGG/PNG
        IMAGEMODE RGB
    END #Outputformat

    LAYER
        NAME SpokaneTrafficFlows
        DATA TrafficFlow_2007
        STATUS ON
        TYPE LINE

        DEBUG 5

        CLASS
            NAME "classSpokaneTrafficFlows"

            STYLE
                COLOR 127 255 64
                OPACITY 50
                OUTLINECOLOR 255 128 64
                WIDTH 3
            END #style
        END #class
    END #layer
END #Map

running shp2img.exe returns:
msLoadMap(): Image handling error. Unable to initialize image
msCalculateScale(): General error message. invalid image extent ....

I get the same results for shp2img on the working shapefile/map file.


THE FOLLOWING WORKS:

MAP

  IMAGETYPE      AGG
  SIZE           256 256
  SHAPEPATH      "/MapServerData/ShapeFiles/1"
  IMAGECOLOR     255 255 255
  TRANSPARENT    ON
  FONTSET        "../../fonts/fonts.list"

CONFIG PROJ_LIB "c:\ms4w\proj\nad\"

  PROJECTION
     "init=epsg:4326"
  END

  OUTPUTFORMAT
    NAME 'AGG'
    DRIVER AGG/PNG
    IMAGEMODE RGB
  END #Outputformat

  LAYER
    NAME          TxCounties
    DATA   co48_d00
    STATUS      ON
    TYPE        Polygon

    CLASS
        NAME  "classTxCounties"

        STYLE
            COLOR         0 255 0
            OPACITY      25
            OUTLINECOLOR  0 0 0
            WIDTH       2
        END #style
    END #class
  END #layer
END #Map



Anyone have any idea's why this might not work in the first case? Or what else can I do to debug the problem?


Kent
<mailto:kmorrison at advantrack.com>