Tilemill svg的导出分辨率和缩放级别有什么关系？

Question

Tilemill works great, mostly very usable! I managed to get to the part where I am making svg exports of my map made with osm-bright as a starter. That seems to be fine but I cant work out how the resolution I specify for the SVG relates to the zoom levels. I guess it has something to do with the tile size, can someone help me understand this?

Thanks a lot, Joris.

Answer 1

First, for printing, the resolution is 90.7 ppi (some OGC standard or whatever). Some round it down to 90 ppi.

Zoom-to-scale relation is calculated in this table : 1:2132 on z18, 1:4265 on z17 and so on. Also see this page on OSM wiki for formulas.