Add the tile aggregation to the tile export
To preserve privacy of home owners, tiles with few buildings should be aggregated to larger parent tiles to obfuscate the building-specific details. The user should have the option to define a minimum number of buildings per tile so that in the case of a fewer buildings are present the tile gets aggregated with neighboring tiles to a parent tile (and to larger tiles further if necessary). To prevent too large tiles, the user should also be able to provide a minimum zoom level at which the aggregation should stop in any case.