How to Fix Ratty Line Rendering in WMS? - Redux

[Bill Thoen]

I hadn't done that, but when I did, I got an error printed on the map:
"Invalid SRS given. SRS must be valid for all requested layers"

I also have EPSG:2163 listed as one of the option in the WEB METADATA of 
my WMS MAP file. Do I need to add it somewhere in my WMS layers 
definitions too?

Daniel Morissette wrote:
> Bill Thoen wrote:
>> I've now posted some images showing the problem at 
>> http://www.gisnet.com/wms_examples/.
>>
>> To summarize the problem, I've set up a MapServer WMS Server that's 
>> got road data in native MapInfo format with a coordinate system based 
>> on Lat/Long (EPSG:4269). When I display it in a MapServer client map 
>> using the same projection EPSG:4269, the line work looks nice and 
>> clean. However, if I try to use a different projection in my client 
>> like EPSG:2163 (Lambert), the lines are pretty shabby looking.
>>
>
> Did you list EPSG:2163 in the wms_srs metadata of the CONNECTIONTYPE 
> WMS layer in you client mapfile?
>
> The "wms_srs" metadata in a client WMS connection layer definition is 
> used to list all the projections (SRS) supported by the remote server. 
> It's a space-separated list, e.g.
>
> LAYER
>   ...
>   METADATA
>     "wms_srs" "EPSGL4326 EPSG:4269 EPSG:2163"
>     ...
>   END
>   ...
> END
>
> If the requested SRS is not found in this list then MapServer 
> concludes that the remote server doesn't support that projection and 
> then it uses the layer's default SRS for its GetMap call to the remote 
> server and then reprojects the resulting image on the fly.
>
> This is probably what's happening here and explains the shabby looking 
> lines.
>
> Daniel