Hello,<br><br>I have a question concerning the architecture of WMS/WFS and PostGIS:<br>Is PostGIS just for WFS or could it be used also to store the card<br>material for a WMS? - How typically a WMS stores its card material?<br>Also in sort of a database? - Is it standardized? Or is the card<br>material just stored in a directory/file structure without database<br>functionality?<br><br>Furthermore, I found the following PDF:<br><br>http://lists.refractions.net/pipermail/postgis-users/attachments/20020424/20dcffd7/OGC-OSS.pdf<br><br>On page 2 the WFS on the bottom acesses Rasters and Images. But I<br>thought, WFS is just for vector data (features), stored in e.g.<br>ESRI shapes or PostGIS, like the other two datasources. But is it<br>really true like in this diagram that a WFS also can access raster<br>images? - I thought this is normally done by WMS/WCS?<br><br>Please could anyone help to clear my confusion?<br><br>Best regards,<br><br>Peter.<p> 
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