v0.3

OPHZ v0.3 covers the 48 contiguous US states, and includes tiff, shapefile, geojson, and topojson formats, and also includes .qml and .lyr styles for QGIS and ArcGIS users.

v0.2

OPHZ v0.2 covers the 48 contiguous US states, and includes tiff, shapefile, geojson, and topojson formats.