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MapnikRasterizer fails "Failed to rasterize data. The error was: Image area too large based on image dimensions" due to memory problems according to a post I read in here. The solution was to tile the layer and use groupBy "column,row" but thats not working for me. If I try that I get following errors "no input data for layer..."

 

I know I can change cellSpacing but I really need a high resolution map.

 

One option I can think of is making an oversight map and make a grid where each grid is its own map, but I dont know if I can do that with only 1 mapnikRasterizer.

 

I attach a workspace that kind of resemble my original data, in the workspace you can see that I tiled the map and group by column and row but it fails.

 

Thankful for any help or input.

You also need to assign the group id to the other input features. What I would do:

  • After the AttributeKeepers, AttributeCreators attribute type, value polygon, points, line1, line2a, line2b. You need this
  • All outputs to an BoundingBoxAccumulator to get one big extent of all data.
  • Tiler to tile the extend.
  • UUIDGenerator to generate unique id's for each tile.
  • Clipper to clip inputdata with tiles, merge attributes to get tile id to data.
  • AttributeFilter to split all types for input mapnikrasterizer.
  • set mapnickrasterizer group by _uuid.
  • rastermosaiker to merge results

You also need to assign the group id to the other input features. What I would do:

  • After the AttributeKeepers, AttributeCreators attribute type, value polygon, points, line1, line2a, line2b. You need this
  • All outputs to an BoundingBoxAccumulator to get one big extent of all data.
  • Tiler to tile the extend.
  • UUIDGenerator to generate unique id's for each tile.
  • Clipper to clip inputdata with tiles, merge attributes to get tile id to data.
  • AttributeFilter to split all types for input mapnikrasterizer.
  • set mapnickrasterizer group by _uuid.
  • rastermosaiker to merge results

Thanks for the help, that actually works even tho i get out of memory, but its because of the big extent of this test area in combination with low cell spacing. In my real workspace I don't have such a big extent as this. So I will implement this workflow in my real workspace and try it out!

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