Colors indicate light pollution ratings. Only non-private charts in Cat Island shown: 1 of 6145 in North America.
How to read this map
This map shows where astronomy-specific weather forecasts, or "clear sky charts", are available.
The colors of the markers indicate
amount of light pollution there (colors defined here). You can:
Click on a maker to display a the small version of the chart, and link to the full version
Click and drag to pan the map.
Roll mouse wheel to zoom in or out, or double click to zoom in.