Overlays work on any map layer and provide a wealth of additional information to help you plan your next adventure. To help you understand what the various colors represent, here is a handy key:
US Contours
We use a smooth gradient slope shading color scheme to visually represent slope angles.
- Up to 20 degrees is Green
- 21-28 degrees is Yellow
- 29-40 degrees is Red
- 41-55 degrees is Blue
- 56-60 degrees is Black
Fire History (Pro overlay)
- Older fire areas are Yellow
- Recent fire areas are Orange to Red
- Active fires are Fire icon or an 'X'
Weather (Pro overlay)
This overlay is a combination of satellite and radar. To help differentiate the intensity of falling rain or snow, different colors are used for radar.
- Light green is light rain
- Dark green is light to moderate rain
- Yellow is moderate rain
- Orange is heavy rain
- Red is very heavy rain or rain and hail
- Blue is snow
- Purple is freezing rain or sleet
Air Quality (Pro overlay)
Our real-time air quality index is represented via a color-coded heatmap, where green indicates the cleanest air and red indicates the most polluted.
Pollen (Pro Overlay)
Pollen concentrations are represented in a color-coded heatmap where green indicates the lowest concentration of pollen and red indicates the highest concentration.
Light Pollution (Pro Overlay)
Areas displayed in red show the most light polluted areas while green shows the least polluted.