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You can turn any paper map or field sketch into a GPS enabled map that you can use on your smart device.
Using Caltopo and Avenza Maps, you can take that paper map from the park headquarters, ski club or any where and turn it into a basemap to use with your smart device GPS, using the features of caltopo.com.
This technique involves georeferencing a scanned map and creating a geopdf. With Avenza Maps, your smart device can interpret this map and place your GPS cursor on your location on the map (on your smart device).
0:00 Intro
0:45 Apps needed
1:35 Setting up Cal Topo
4:45 Creating the Map in Caltopo
14:00 Exporting to Smart Device