separate remove() job

server/tilerendererjob/common.go

@@ -39,12 +39,40 @@ func renderMapblocks(ctx *app.App, jobs chan *coords.TileCoords, mblist []*mapbl
 				"Zoom":    tc.Zoom,
 				"LayerId": tc.LayerId,
 			}
-			logrus.WithFields(fields).Debug("Dispatching tile rendering (z11-1)")
-
-			tilecount++
+			logrus.WithFields(fields).Debug("Tile removing (z12-1)")
 
 			//remove tile
 			ctx.Objectdb.RemoveTile(tc)
+		}
+	}
+
+	tileRenderedMap = make(map[string]bool)
+
+	for i := 12; i >= 1; i-- {
+		for _, mb := range mblist {
+			//13
+			tc := coords.GetTileCoordsFromMapBlock(mb.Pos, ctx.Config.Layers)
+
+			//12-1
+			tc = tc.ZoomOut(13 - i)
+
+			key := getTileKey(tc)
+
+			if tileRenderedMap[key] {
+				continue
+			}
+
+			tileRenderedMap[key] = true
+
+			fields := logrus.Fields{
+				"X":       tc.X,
+				"Y":       tc.Y,
+				"Zoom":    tc.Zoom,
+				"LayerId": tc.LayerId,
+			}
+			logrus.WithFields(fields).Debug("Dispatching tile rendering (z12-1)")
+
+			tilecount++
 
 			//dispatch re-render
 			jobs <- tc