[1ec5]

Added indigenous administration boundaries, corresponding to boundary=indigenous_administration. This tag represents, for instance, tribal reservation boundaries in the U.S. It doesn’t apply to some other related indigenous territorial concepts that continue to be tagged boundary=aboriginal_lands until we come up with better tagging. The new layers are limited to admin_level=2, that is, the indigenous groups’ external borders. A future enhancement could add more subtle styling for internal borders, such as chapters or districts.

The boundary lines and centroid labels are maroon-colored. We need a distinct color because reusing the dark gray of boundary=administrative would really confuse users wherever the two boundary types crisscross. The brown or rust color on typical North American maps would too easily blend in with some existing features like buildings and military landuse. The labels are in the same style as country labels, in an attempt to acknowledge indigenous sovereignty, but the labels are slightly smaller because the areas are generally smaller. Because the reservations in the U.S. come in all sizes, I’ve introduced an area-based filter. Hopefully the filter’s zoom level ramp minimizes the number of cases where the label obscures the boundary entirely. In the future, we should extend a similar filter to country and state centroid labels too.

Fixes OpenHistoricalMap/issues#1424.