[mapserver-users] RE: Images returning blank

Tue Jan 19 14:24:42 PST 2010

Hi,

The non-working one is in some other projection than epsg:4326. You will get that layer visible by removing projection also from the MAP level and using the extents from ogrinfo, but in order to show both layers together you should know the correct projection for both datasets.
If projection is given at map level it must suit the extents.  Epsg:4326 and EXTENT 2460247.751004 232706.929725 2507483.898985 294550.472704 do not suit.

-Jukka-

-----Alkuperäinen viesti-----
Lähettäjä: mapserver-users-bounces at lists.osgeo.org puolesta: Kent Morrison
Lähetetty: ke 20.1.2010 0:14
Vastaanottaja: 'Fawcett, David (MPCA)'; 'mapserver-users at lists.osgeo.org'
Aihe: [mapserver-users] RE: Images returning blank

I ran ogrinfo.exe on the non-working file.

C:\ms4w\tools\gdal-ogr>ogrinfo.exe c:\mapserverdata\shapefiles\1\trafficflow_200
7.shp trafficflow_2007 -so
INFO: Open of `c:\mapserverdata\shapefiles\1\trafficflow_2007.shp'
      using driver `ESRI Shapefile' successful.

Layer name: trafficflow_2007
Geometry: Line String
Feature Count: 4212
Extent: (2460247.751004, 232706.929725) - (2507483.898985, 294550.472704)
Layer SRS WKT:
(unknown)
CounterID: Integer (10.0)
Location: String (50.0)
StartDate: Date (10.0)
ADT_Total: Integer (10.0)
AWD_Total: Integer (10.0)
XCoord: Real (19.8)
YCoord: Real (19.8)
StreetID: String (16.0)
Shape_len: Real (19.11)

I added:

EXTENT 2460247.751004 232706.929725 2507483.898985 294550.472704

to the map file and changed the Layer Status to Default.

[Tue Jan 19 21:43:35 2010].791000 CGI Request 1 on process 2676
[Tue Jan 19 21:43:35 2010].791000 msTileSetExtent (-13073784.538762, 6051371.431753) (-13071348.108486, 6053807.862029)
[Tue Jan 19 21:43:35 2010].791000 msDrawMap(): Layer 0 (SpokaneTrafficFlows), 0.000s
[Tue Jan 19 21:43:35 2010].791000 msDrawMap(): Drawing Label Cache, 0.000s
[Tue Jan 19 21:43:35 2010].791000 msDrawMap() total time: 0.000s
[Tue Jan 19 21:43:35 2010].822000 msSaveImage() total time: 0.031s
[Tue Jan 19 21:43:35 2010].822000 mapserv request processing time (loadmap not incl.): 0.031s
[Tue Jan 19 21:43:35 2010].822000 msFreeMap(): freeing map at 01A5AF10.

Still a blank image.

When I ran ogrinfo.exe on the working shapefile:

C:\ms4w\tools\gdal-ogr>ogrinfo.exe c:\mapserverdata\shapefiles\1\co48_d00.shp -s
o co48_d00
INFO: Open of `c:\mapserverdata\shapefiles\1\co48_d00.shp'
      using driver `ESRI Shapefile' successful.

Layer name: co48_d00
Geometry: Polygon
Feature Count: 265
Extent: (-106.645646, 25.837377) - (-93.516407, 36.500704)
Layer SRS WKT:
(unknown)
AREA: Real (20.5)
PERIMETER: Real (20.5)
CO48_D00_: Real (11.0)
CO48_D00_I: Real (11.0)
STATE: String (2.0)
COUNTY: String (3.0)
NAME: String (90.0)
LSAD: String (2.0)
LSAD_TRANS: String (50.0)

The Extents on the working file are in lat/lon. In the non-working file it looks to be in something else.

I'm trying to return VE image tiles..

not sure where to go from here to get the first file to work.

Thanks

________________________________
From: Fawcett, David (MPCA) [mailto:David.Fawcett at state.mn.us]
Sent: Tuesday, January 19, 2010 3:28 PM
To: Kent Morrison; 'mapserver-users at lists.osgeo.org'
Subject: RE: Images returning blank

Based on the errors, it looks like you will need EXTENT to your map file at the MAP level.

What do you get when you run ogrinfo against the two shapefiles?  Any difference?

Are you adding a URL var for the layer name?  Try setting LAYER STATUS to DEFAULT for both layers and see if you get an image back.

David.

From: mapserver-users-bounces at lists.osgeo.org [mailto:mapserver-users-bounces at lists.osgeo.org] On Behalf Of Kent Morrison
Sent: Tuesday, January 19, 2010 3:17 PM
To: 'mapserver-users at lists.osgeo.org'
Subject: [mapserver-users] Images returning blank

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