In this case, you might be able to walk the trail only once, while capturing a single GPS track log and taking occasional photos of major points of interest. For example, if the imagery is very coarse, there's not much point in drawing a very detailed and accurate trail map. This has a big effect on how you capture the raw data. At a usable scale, any fine details of the trails would be invisible, and nearby points of interest might be right on top of each other. On the other hand, if the imagery is not very detailed, there's not much point in trying to make your map very detailed and accurate. For example, if the imagery is very detailed (where you can see individual trees), you can make your map very detailed by trying to accurately locate trails and points of interest to within 10 feet or less. You have to decide how detailed and accurate you want your trail map to be. Some regions have very detailed imagery where you can see individual trees and even people, but other areas show much less detail (see the pictures at the top of the page). Process and preserve the data after each session in the fieldīefore you get started on your trail map project, check out the imagery on Google Earth to make sure it's detailed enough for your purposes.Fieldwork: walk the trails, take pictures, take notes.Prepare your equipment prior to each session in the field.Do some planning first, to organize your fieldwork.This step will be easier if you break it up into a few tasks: If I zoomed-in this picture to the same scale as the other picture, it would be a totally useless blur. Note the scale-this picture shows much more territory than the other picture. This imagery showing a stream channel at Calvert Cliffs State Park is much less detailed. How To Make A Trail Map Using Google Earth How To Make A Trail Map Using Google Earth Capturing The Raw DataĪn example of very detailed imagery from Google Earth showing a trail bridge and individual trees in Quiet Waters Park, Annapolis, Maryland.
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