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Geocaching.com - The biggest and best site about geocaching. Garmin - Garmin brand GPS units. (I use an eTrex) Magellan - Magellan brand GPS units. Lowrance - Lowrance brand GPS units. Joe and Jack's GPS site - Informative but not pretty. (...but neither is this!) PASDA - Pennsylvania Spatial Data Access for digital quad maps (DRG's). DRG's for Other States - from the USGS... ESRI - Free software for those DRG's! (ArcExplorer) Geo Community - DRG's and other GIS data. ERDAS - More free software... (You have to register.) MapTools - Makes rulers, grids and things for GPS users. |
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