Terraserver Request example

Question

Anyone can provide me an example about how to add Terraserver WMS theme to <map_request>...</map_request>
I used the following format but it doesn't work:
<theme name="GRAYSCALE_WMS">
<wms_getmap_request>
<service_url>http://terraservice.net/ogcmap.ashx</service_url>
<version>1.1.1</version>
<layers>DOQ</layers>
<styles></styles>
<srs>EPSG:4326
</srs>
<format>image/png</format>
<transparent>true</transparent>
<vendor_specific_parameters>
<vsp>
<name>srs</name>
<value>EPSG:4326
</value>
</vsp>
<vsp>
<name>transparent</name>
<value>true</value>
</vsp>
<vsp>
<name>format</name>
<value>image/png</value>
</vsp>
</vendor_specific_parameters>
</wms_getmap_request>
</theme>
Thanks lot.
Frank

Answer 1

You are missing some WMS parameters like request and bbox etc. Here's a sample URL request:
http://terraservice.net/ogcmap.ashx?version=1.1.1&request=GetMap&Layers=DOQ&Styles=&SRS=EPSG:26910&BBOX=544000,4180400,556800,4188400&width=800&height=500&format=image/jpeg&Exceptions=se_xml
Broken down it looks like this:
version=1.1.1
request=GetMap
Layers=DOQ
SRS=EPSG:26910
BBOX=544000,4180400,556800,4188400
width=800
height=500
format=image/jpeg
Hope this helps.
-Justin