[mapserver-users] CGI Tilemode blank on one layer

[Daniel Mwaurah]

hallo people,

I would greatly appreciate some help with Mapserver Tile mode. Eeven a hint
in the right direction would be much appreciated. I am trying to display
two layers in Tile mode in open layers as follows


1.
http://localhost/cgi-bin/mapserv?MAP=/var/wpsinput/gdss.map&layer=kenyaoutline&mode=tile&tile=${x}+${y}+${z}.png

2.
http://localhost/cgi-bin/mapserv?MAP=/var/wpsinput/gdss.map&layer=10m_ocean&mode=tile&tile=${x}+${y}+${z}.png


The problem arises in that one layer the 10m_ocean displays while the other
one just shows a blank. I suspect it has to do with the extents because the
10m_ocean layers has a large extent from -180 to 180 while the kenyaoutline
layer only covers one country from about 33 to 37 degrees.

Is there a limitation to small extents in tile mode? or what could be the
problem. My mapfile is as below.


MAP
  #FONTSET "[fontsetpath]"
DEBUG 5
  CONFIG "MS_ERRORFILE" "/var/www/wpsinput/ms_error.txt"
  EXTENT 33 -5 42 6
  IMAGETYPE "png"
  NAME "Natural_Earth_quick_start_for_QGIS"
  SIZE 600 600
  CONFIG ON_MISSING_DATA "LOG"
  STATUS ON
  UNITS DD

  OUTPUTFORMAT
    NAME "png"
    MIMETYPE "image/png"
    DRIVER "AGG/PNG"
    EXTENSION "png"
    IMAGEMODE RGBA
    TRANSPARENT TRUE
  END # OUTPUTFORMAT

  PROJECTION
    "proj=longlat"
    "datum=WGS84"
    "no_defs"
  END # PROJECTION
  LEGEND
    KEYSIZE 20 10
    KEYSPACING 5 5
    LABEL
      SIZE MEDIUM
      OFFSET 0 0
      SHADOWSIZE 1 1
      TYPE BITMAP
    END # LABEL
    STATUS OFF
  END # LEGEND

  QUERYMAP
    SIZE -1 -1
    STATUS OFF
    STYLE HILITE
  END # QUERYMAP

  SCALEBAR
    INTERVALS 4
    LABEL
      SIZE MEDIUM
      OFFSET 0 0
      SHADOWSIZE 1 1
      TYPE BITMAP
    END # LABEL
    SIZE 200 3
    STATUS OFF
    UNITS MILES
  END # SCALEBAR

  WEB
    FOOTER ""
    HEADER ""
    TEMPPATH ""
    METADATA
      "ows_onlineresource" "
http://localhost/cgi-bin/mapserv?map=/home/wpsinput/worldmap.map"
      "ows_enable_request" "*"
      "ows_srs" "EPSG:4326"
      "ows_title" "Natural_Earth_quick_start_for_QGIS"
    END # METADATA
    #TEMPLATE "[templatepath]"
  END # WEB

  LAYER
    DATA "/var/www/10m_physical/10m_ocean.shp"
    EXTENT 33 -5 42 6
    METADATA
      "ows_title" "10m_ocean"
    END # METADATA
    NAME "10m_ocean"
    PROJECTION
      "proj=longlat"
      "datum=WGS84"
      "no_defs"
    END # PROJECTION
    STATUS ON
    TILEITEM "location"
    TYPE POLYGON
    UNITS METERS
    CLASS
      NAME "Single symbol"
      STYLE
        COLOR 198 226 242
      END # STYLE
    END # CLASS
  END # LAYER


LAYER
    DATA "/var/www/kenyaoutline/Kenyaoutline.shp"
    EXTENT 33 -5 42 6
    METADATA
      "ows_title" "Kenyaoutline"
    END # METADATA
    NAME "Kenyaoutline"
    PROJECTION
      "proj=longlat"
      "datum=WGS84"
      "no_defs"
    END # PROJECTION
    STATUS ON
    TILEITEM "location"
    TYPE POLYGON
    UNITS METERS
    CLASS
      NAME "Single symbol"
      STYLE
        COLOR 0 0 0
      END # STYLE
    END # CLASS
  END # LAYER

END # MAP



The same happens when i try to view it using QGIS Tilelayer plugin.


-- 
Kind regards,

Mwaura Daniel
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