Contours (Feet)

https://tiles.openstreetmap.us/vector/contours-feet.json

Topographic contour lines with elevation values in feet. Derived from Mapzen’s global DEM dataset, which combines data from various open DEM datasets. Created using GDAL.

Contour interval varies with zoom level. Contour elevations are given by the ele attribute. Index contours (every fifth contour line, which are typically labeled on maps) are indicated by the idx = true attribute.