A simple tool to prune minetests' map.sqlite file and delete all blocks outside a certain range.
This program is licensed LGPL-2.1, with MIT components. It includes some code from minetest verbatim to convert blockpos-nodepos.
mtmapprune map.sqlite max_x [max_y [max_z [min_x min_y min_z]]]
If omitted, max_y and max_z default to the value of the max_x
limit. The min_* limits will default to the negative values of the
max_* limits. The limits are node positions, not "block positions".
Example: to prune all nodes with x and z > 1000, and x and z < -1000 and y > 200, and y < 200, use:
mtmapprune map.sqlite 1000 200