

This data is generally gathered by airplanes flying over the fires. The GeoMAC active fire perimeter KML shows large incidents and their actual heat perimeter.In other words, it’s also not very accurate. When a cell is ‘turned on’ (showing heat), there is a 50% chance there is fire within that cell. MODIS is 1 km resolution, so 1 km 2 forms a cell. This is satellite data that updates automatically. The MODIS Fire Detections KML layer shows fires along the PCT.View online interactive maps that show snow on the Pacific Crest Trail.This is a computer model based off of survey sensors. The latest snow overlays must be downloaded daily.Google Earth becomes really great when you load layers like these
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Features such as park and wildfire boundaries, roads, cloud cover, and current snowpack totals can be displayed.

You can pan and zoom from campsite to water source, peak to valley.
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Google Earth is a free application that provides a remarkable aerial view of the entire Pacific Crest Trail. The Pacific Crest Trail around Muir Pass in Google Earth.
