Note: Both the GIS Data and the USD Aerial Image are in a self-extracting zip file format. They are extremely large and you should use discretion when attempting to download these on a dial-up connection. Both the GIS data and aerial images are for school use only. The following data layers are contained in each county zip file (when data is available).

GCS_North_American_1983
NAD_1983_UTM_Zone_12N
Meters

Layer Name - SGID024.FaultLines
Layer Name - SGID024.Floodplains
Layer Name - SGID024.Lakes
Layer Name – SGID024_Municipalities2002
Layer Name - SGID024.Springs
Layer Name - SGID024.Streams
Layer Name - SGID024.WaterRelatedLandUse2001
Layer Name - SGID024.Wetlands
Layer Name - SGID100.Airports
Layer Name - SGID100.DamFailure
Layer Name – SGID100.LandOwnershipCategories
Layer Name - SGID100.LiquefactionPotential
Layer Name - SGID100_PlacenamesGNIS2000
Layer Name - SGID100.RailroadsDLG100
Layer Name - SGID100.RoadsDLG100
Layer Name - SGID500.Contours500Ft
Layer Name - SGID500.DominantVegetation
Layer Name - SGID500.GSLShoreline
Layer Name - SGID500.HistoricLakeBonneville
Layer Name - SGID500.HistoricTrails
Layer Name – SGID500_Pony_Express_Stations
Layer Name - SGID500.RecreationAreasESRI
Layer Name - SGID500.VolcanicCones