Details of the output system
The output system consists of three processes. 1. reproject and resample all input maps. The 250m DEM provides a template for the grid system and the projection is ESPG 3979
2. mosaic and merge, Mosaic the grids with an 'average' function for overlapping pixels. This portion of the output system will become ore sophisticated with time. Weighted averages are anticipated once a method is in place to calculate the weights for the individual grids.
3. Calculate or assign errors. For map contributions prepared by simple map upscaling and rasterizing, uncertainty values can be assigned based on the judgment of the map creator or other information. For DSM products, and error uncertainty may be derived as part of the modeling procedure.