[mapserver-users] CGI Tilemode blank on one layer

Thu Dec 24 07:45:24 PST 2015

Since you have no scale dependencies or anything like that I don’t know why… You have some spurious layer definitions (no need for TILEITEM or UNITS) but I don’t think that’s the problem. The most obvious cause would be that you’re viewing an area where there is ocean but no Kenya. What happens if you request both layers in the same tile?
  http://localhost/cgi-bin/mapserv?MAP=/var/wpsinput/gdss.map&layer=10m_ocean&layer=kenyaoutline&mode=tile&tile=${x}+${y}+${z}.png<http://localhost/cgi-bin/mapserv?MAP=/var/wpsinput/gdss.map&layer=10m_ocean&layer=kenyaoutline&mode=tile&tile=$%7bx%7d+$%7by%7d+$%7bz%7d.png>
Steve

From: Daniel Mwaurah [mailto:mwaurah at gmail.com]
Sent: Wednesday, December 23, 2015 4:30 PM
To: Lime, Steve D (MNIT) <Steve.Lime at state.mn.us>
Cc: mapserver-users at lists.osgeo.org
Subject: Re: [mapserver-users] CGI Tilemode blank on one layer

Thats true Steve,

Its actually rendering in the non tiled setting. I wonder how come its one layer not rendering in tilemode while the other one is. Both render ok in non tile setting.

On Wed, Dec 23, 2015 at 10:29 PM, Lime, Steve D (MNIT) <Steve.Lime at state.mn.us<mailto:Steve.Lime at state.mn.us>> wrote:
It will look at the extent of shapefiles to decide if it needs to process features in a layer but that’s to be expected. I mean, if there’s nothing to draw then why bother. Have you verified that the layers render in a non-tiled setting?

From: Daniel Mwaurah [mailto:mwaurah at gmail.com<mailto:mwaurah at gmail.com>]
Sent: Wednesday, December 23, 2015 3:26 PM
To: Lime, Steve D (MNIT) <Steve.Lime at state.mn.us<mailto:Steve.Lime at state.mn.us>>
Cc: mapserver-users at lists.osgeo.org<mailto:mapserver-users at lists.osgeo.org>
Subject: Re: [mapserver-users] CGI Tilemode blank on one layer

Thank you Steve for your response.

I have tried commenting out the extents but still the same problem. I think it recognizes the inbuilt extents of the data layers.

On Wed, Dec 23, 2015 at 9:36 PM, Lime, Steve D (MNIT) <Steve.Lime at state.mn.us<mailto:Steve.Lime at state.mn.us>> wrote:
What happens if you comment out the layer extents? They really shouldn’t be necessary.

From: mapserver-users [mailto:mapserver-users-bounces at lists.osgeo.org<mailto:mapserver-users-bounces at lists.osgeo.org>] On Behalf Of Daniel Mwaurah
Sent: Wednesday, December 23, 2015 2:27 PM
To: mapserver-users at lists.osgeo.org<mailto:mapserver-users at lists.osgeo.org>
Subject: [mapserver-users] CGI Tilemode blank on one layer

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}+${z}.png<http://localhost/cgi-bin/mapserv?MAP=/var/wpsinput/gdss.map&layer=kenyaoutline&mode=tile&tile=$%7bx%7d+$%7by%7d+$%7bz%7d.png>

2. http://localhost/cgi-bin/mapserv?MAP=/var/wpsinput/gdss.map&layer=10m_ocean&mode=tile&tile=${x}+${y}+${z}.png<http://localhost/cgi-bin/mapserv?MAP=/var/wpsinput/gdss.map&layer=10m_ocean&mode=tile&tile=$%7bx%7d+$%7by%7d+$%7bz%7d.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

--
Kind regards,

Mwaura Daniel

--
Kind regards,

Mwaura Daniel
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