c#-mapscript, zooming problem on Landsat-Layer

[Tamas Szekeres]

Hi Christian,

If you are using the "layerObj(mapObj map)" constructor you might have to
use the latest CVS version with the following fix included in csmodule.i

/***************************************************************************
***
 * Preventing to take ownership of the memory when constructing objects 
 * with parent objects (causing nullreference exception, Bug 1743)
 
****************************************************************************
*/

%typemap(csconstruct, excode=SWIGEXCODE) layerObj(mapObj map) %{:
this($imcall, true) {
  if (map != null) this.swigCMemOwn = false;$excode
}
%}
%typemap(csconstruct, excode=SWIGEXCODE) classObj(layerObj layer) %{:
this($imcall, true) {
  if (layer != null) this.swigCMemOwn = false;$excode
}
%}
%typemap(csconstruct, excode=SWIGEXCODE) styleObj(classObj parent_class) %{:
this($imcall, true) {
  if (parent_class != null) this.swigCMemOwn = false;$excode
}
%}

The corresponding bug report is:

http://mapserver.gis.umn.edu/bugs/show_bug.cgi?id=1743

However your error message is slightly confusing so i would not wonder if it
was not the only problem. I am keen to try this out.

Best Regards,

Tamas Szekeres



-----Original Message-----
From: UMN MapServer Users List [mailto:MAPSERVER-USERS at LISTS.UMN.EDU] On
Behalf Of Christian Wilmes
Sent: Tuesday, June 13, 2006 12:30 PM
To: MAPSERVER-USERS at LISTS.UMN.EDU
Subject: [UMN_MAPSERVER-USERS] c#-mapscript, zooming problem on
Landsat-Layer

Hi all,

I try to use I Layer from the Landsat-WMS in my c#-Application. The first
time I get the Layer everything works fine but after zooming or just
refreshing the map I get the following error:
msBuildWMSLayerURLBase(): WMS connection error. One of wms_onlineresource,
wms_server_version, wms_name metadata is missing in layer Landsat.  Please
either provide a valid CONNECTION URL, or provide those values in the
layer's metadata.

Trying it with other layers everything is ok.

The part of the code where I add the Layer:
layerObj landsat = new layerObj(myMap);
            landsat.name = "Landsat";
            landsat.type = MS_LAYER_TYPE.MS_LAYER_RASTER;
            landsat.status = mapscript.MS_OFF;
            landsat.connectiontype = MS_CONNECTION_TYPE.MS_WMS;
            landsat.connection = "http://wms.jpl.nasa.gov/wms.cgi?";
            hashTableObj metaLandsat = new hashTableObj();
            metaLandsat.set("wms_name", "global_mosaic");
            metaLandsat.set("wms_server_version", "1.1.0");
            metaLandsat.set("wms_onlineresource",
"http://wms.jpl.nasa.gov/wms.cgi?");
            metaLandsat.set("wms_srs", "EPSG:4326");
            metaLandsat.set("wms_format", "image/jpeg");
            metaLandsat.set("wms_style", "");
            metaLandsat.set("wms_connectiontimeout", "100");
            landsat.metadata = metaLandsat;
            landsat.setProjection("init=epsg:4326");



Hope anybody could help me with that problem.

Best Regards
Christian
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