This interactive web mapping application displays a georectified version of the original 1986 Idaho Ground Snow Load map overlaid on a topographic base map. An opacity slider allows users to adjust the transparency of the 1986 map layer in order to see more clearly the underlying terrain. Additionally, users are able to search for a location by entering a town name, a latitude/longitude (in decimal degrees), or a street address. A ground snow load for the location will be displayed for the user.
Users can navigate around the map by zooming in/out and moving north/south/east/west and then clicking a location on the map to determine a ground snow load value for the selected location. The latitude, longitude, and elevation are displayed for the user. The elevation value is determined from the USGS Elevation Point Query Service. Users must manually read the snow load value from the map legend and enter it to calculate the ground snow load in psf, which is determined by multiplying the normalized ground snow load by the elevation in feet.
This document is not legally binding. The user is urged to verify ground snow load values with the local authority having jurisdiction.
