[mapserver-users] mapserver as a tiling client for an untiled WMS

[Smith, Michael ERDC-CRREL-NH]

Marco,

  Correct, these will just be regular WMS requests and GDAL will stitch them
together. If you enable the cache, the images can be cached locally.

Mike


-- 
Michael Smith
RSGIS Center
US Army Corps of Engineers



On 4/18/10 3:04 PM, "DeDuikertjes" <DeDuikertjes at xs4all.nl> wrote:

> Michael,
> 
> Thank you.
> 
> Do I understand correctly that this GDAL WMS Minidriver with this xml
> file for a given map area (bounding box) will do a series of "normal"
> WMS requests (as opposed to "tiled" WMS requests) to the server to
> obtain a set of tiles which will be stitched together and incorporated
> in the map?
> 
> MArco
> 
> 
> Smith, Michael ERDC-CRREL-NH schreef:
>> Marco,
>> 
>> To use the GDAL WMS Minidriver, create an XML file like below and then
>> reference that xml file in your MapServer layer. For more info about the
>> format of the WMS xml, see here http://www.gdal.org/frmt_wms.html
>> 
>> Example xml
>> -----------
>> 
>> <GDAL_WMS>
>>   <Service name="WMS">
>>       <Version>1.1.1</Version>
>>  <ServerUrl>http://hazards.fema.gov/wmsconnector/wmsconnector/com.esri.wms.E
>> srimap/NFHL?transparent=true&</ServerUrl>
>>         <SRS>EPSG:4326</SRS>
>>         <Layers>Flood_Hazard_Zones_General</Layers>
>>         <Styles>default</Styles>
>>         <ImageFormat>image/gif</ImageFormat>
>>     </Service>
>>     <DataWindow>
>>         <UpperLeftX>-180.0</UpperLeftX>
>>         <UpperLeftY>90.0</UpperLeftY>
>>         <LowerRightX>180.0</LowerRightX>
>>         <LowerRightY>-90.0</LowerRightY>
>>         <TileLevel>19</TileLevel>
>>         <TileCountX>2</TileCountX>
>>         <TileCountY>1</TileCountY>
>>     </DataWindow>
>>     <Projection>EPSG:4326</Projection>
>>     <BlockSizeX>1024</BlockSizeX>
>>     <BlockSizeY>1024</BlockSizeY>
>>     <BandsCount>3</BandsCount>
>>      <Cache>    
>>         <Path>/htdocs/orm/gdalwmscache</Path>
>>         <Depth>2</Depth>
>>         <Extension>.gif</Extension>
>>      </Cache>
>>   <AdviseRead>true</AdviseRead>
>>   <VerifyAdviseRead>true</VerifyAdviseRead>
>> </GDAL_WMS>
>> 
>> ----------------
>> 
>> Mapfile section
>> ---------------
>> 
>> LAYER
>>   NAME femaq3
>>   DATA "/data/fema/fema_gen_wms.xml"
>>   OFFSITE 255 255 255
>>   TYPE raster
>>   STATUS off
>>   PROJECTION
>>     "proj=latlong"
>>     "ellps=GRS80"
>>   END
>>   CLASS
>>       NAME "100 year floodplain"
>>       SYMBOL 0
>>     COLOR 255 0 0
>>   END
>>   CLASS
>>       NAME "500 year floodplain"
>>       SYMBOL 0
>>     COLOR 255 192 203
>>   END
>> END
>> 
>> 
>>