moved quadtree preprocessing out of RenderNode, fixes issue #326

overviewer.py

@@ -228,7 +228,11 @@ def main():
             qtree = quadtree.QuadtreeGen(w, destdir, rendermode=rendermode, **qtree_args)
         q.append(qtree)
     
-    #create the distributed render
+    # do quadtree-level preprocessing
+    for qtree in q:
+        qtree.go(options.procs)
+
+    # create the distributed render
     r = rendernode.RenderNode(q)
     
     # write out the map and web assets
@@ -238,6 +242,7 @@ def main():
     # render the tiles!
     r.go(options.procs)
 
+    # finish up the map
     m.finalize()
 
 

rendernode.py

@@ -149,7 +149,6 @@ class RenderNode(object):
             total += 4**q.p
             if q.p > max_p:
                 max_p = q.p
-            q.go(procs) 
         self.max_p = max_p
         # Render the highest level of tiles from the chunks
         results = collections.deque()