Add a primitive SuperOverlay generator. Will only work with factor

of 2 resolution changes, and doesn't really seem to work as completely 
as I would like, but it's an interesting step forward.

Author: crschmidt

pre-2.0/TileCache/Service.py

@@ -137,12 +137,18 @@ def expireTile (self, tile):
                     self.cache.delete(coverage)
 
     def dispatchRequest (self, params, path_info="/", req_method="GET", host="http://example.com/"):
+        if path_info.split(".")[-1] == "kml":
+            from TileCache.Services.KML import KML 
+            return KML(self).parse(params, path_info, host)
+            raise TileCacheException("What, you think we do KML?")
+        
         if params.has_key("service") or params.has_key("SERVICE") or \
            params.has_key("REQUEST") and params['REQUEST'] == "GetMap" or \
            params.has_key("request") and params['request'] == "GetMap": 
             from TileCache.Services.WMS import WMS
             tile = WMS(self).parse(params, path_info, host)
-        elif params.has_key("L") or params.has_key("l"):
+        elif params.has_key("L") or params.has_key("l") or \
+             params.has_key("request") and params['request'] == "metadata":
             from TileCache.Services.WorldWind import WorldWind
             tile = WorldWind(self).parse(params, path_info, host)
         elif params.has_key("interface"):

pre-2.0/TileCache/Services/KML.py

@@ -0,0 +1,64 @@
+from TileCache.Service import Request, Capabilities
+from TileCache.Services.TMS import TMS
+import TileCache.Layer as Layer
+
+class KML(TMS):
+    def parse (self, fields, path, host):
+        tile = TMS.parse(self,fields, path, host) 
+        tiles = [
+          Layer.Tile(tile.layer, tile.x << 1, tile.y << 1, tile.z + 1),
+          Layer.Tile(tile.layer, (tile.x << 1) + 1, tile.y << 1, tile.z + 1),
+          Layer.Tile(tile.layer, (tile.x << 1) + 1, (tile.y << 1) + 1, tile.z + 1),
+          Layer.Tile(tile.layer, tile.x << 1 , (tile.y << 1) + 1, tile.z + 1)
+        ]
+        
+        network_links = []
+        
+        for single_tile in tiles:
+            b = single_tile.bounds()
+            network_links.append("""<NetworkLink>
+      <name>tile</name>
+      <Region>
+        <Lod>
+          <minLodPixels>128</minLodPixels><maxLodPixels>-1</maxLodPixels>
+        </Lod>
+        <LatLonAltBox>
+          <north>%s</north><south>%s</south>
+          <east>%s</east><west>%s</west>
+        </LatLonAltBox>
+      </Region>
+      <Link>
+        <href>%s/1.0.0/%s/%s/%s/%s.kml</href>
+        <viewRefreshMode>onRegion</viewRefreshMode>
+      </Link>
+    </NetworkLink>""" % (b[3], b[1], b[2], b[0], host, single_tile.layer.name, single_tile.z, single_tile.x, single_tile.y))
+        
+        b = tile.bounds()
+            
+        kml = """<?xml version="1.0" encoding="UTF-8"?>
+<kml xmlns="http://earth.google.com/kml/2.1">
+  <Document>
+    <Region>
+      <Lod>
+        <minLodPixels>128</minLodPixels><maxLodPixels>-1</maxLodPixels>
+      </Lod>
+      <LatLonAltBox>
+        <north>%s</north><south>%s</south>
+        <east>%s</east><west>%s</west>
+      </LatLonAltBox>
+    </Region>
+    <GroundOverlay>
+      <drawOrder>5</drawOrder>
+      <Icon>
+        <href>%s/1.0.0/%s/%s/%s/%s</href>
+      </Icon>
+      <LatLonBox>
+        <north>%s</north><south>%s</south>
+        <east>%s</east><west>%s</west>
+      </LatLonBox>
+    </GroundOverlay>
+    %s
+  </Document>
+</kml>""" % (b[3], b[1], b[2], b[0], host, tile.layer, tile.z, tile.x, tile.y, b[3], b[1], b[2], b[0], "\n".join(network_links))
+
+        return ("text/plain", kml)