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Help spread the word about interesting videos, subscribe to this channel, like and share: https://www.youtube.com/user/boneysp?... Check out the playlists: Geoplanning: • USEFUL RADIO FREQUENCIES FOR TRAILS Knots and Turns: • Guide Line Knot Map and Compass: • How to measure distances with any compass... GPS: • Terrestrial Orientation and Navigation Course... Product Demonstration: • Emergency Kit - What do I take? Courses, lectures, workshops, workshops, classes on maps, compasses, GPS, meteorology, trekking, navigation and orientation, urban cycling (learning to pedal), camping, adventure safety, expedition planning, etc., you can contact me at [email protected] How to create, extract or generate contour lines (contour lines, elevation lines, etc.) to view in Google Earth and other programs. Site to extract the elevation data model (Geotiff) - https://earthexplorer.usgs.gov HOW TO CREATE CONTOUR LINES / RELIEF LINES WITH GLOBAL MAPPER - • HOW TO CREATE CONTOUR LINES / RELIEF LINES ...