Rasterization Strategy
- class RasterizationStrategy(value)[source]
Rasterization Strategy to rasterize a vector.
While downscale strategy provides the best accuracy it requires significantly more resources, especially RAM.
- default = 'default'
The default strategy is to include all pixels along the line render path (for lines), or cells where the center point is within the polygon (for polygons).
- all_touched = 'all_touched'
Alternate, all_touched strategy, rasterizes the geometry by including all pixels that it touches.
- combined = 'combined'
Calculate statistics using both default and all_touched strategy and combine results, e.g. using arithmetic means
- downscale = 'downscale'
A combination of “default” rasterization strategy with affine transformation with downscaling. Downscaling factor is computed based on the grid size and runtime memory available to the process.
Effectively, the grid is interpolated with intermediate nodes, increasing the number of nodes by the factor of 25 (5 x 5). Hence, the accuracy is better, especially for complex and small shapes, however, the aggregation will require 25 times more memory (RAM) and will run slower.
- auto = 'auto'
A combination of “all_touched” rasterization strategy with affine transformation with downscaling. Downscaling factor is computed based on the grid size and runtime memory available to the process.
Effectively, the grid is interpolated with intermediate nodes, increasing the number of nodes by the factor of 25 (5 x 5). Hence, the accuracy is better, especially for complex and small shapes, however, the aggregation will require 25 times more memory (RAM) and will run slower.