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I have a simple workspace to generate some web tiles.  

 

I first used WebMapTileClipper to break the data into vector tiles.  

 

I next ran each vtile through MapnikRaster and grouped by _tile_column & _tile_row.

 

I next sent each raster to WebMapTiler.

 

See my attached workspace image.

 

It seems that WebMapTileClipper and WebMapTiler do not agree on column and row. WebMapTiler generates an extra tile for many of the same tile coordinates.

 

In my attached example you can see that MapnikRaster generated 1 image for _tile_column: 978 and _tile_row: 1655 however WebMapTiler generated 2 tiles.

 

Any advice would be greatly appreciated.

 

Richard Carmel

 

I managed to solve this myself. I removed WebMapTiler and calculated the tile grid over top of my vector data and fed that grid to the rasterizer in order to force the extents of each tile.

 

Cheers,

 

Richard Carmel

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