In this video, we show you how to extract contours using Google Earth, GPS Visualizer, and QGIS and how they compare to contours created from lidar data. We use the Equator platform to source free, public lidar data in the US and generate contours directly from the information on the fly.
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The video will answer the following questions:
0:11 How to generate contours from Google Earth?
1:03 Using GPS Visualizer.
1:30 Creating contours from points in QGIS
3:05 Creating contours from USGS lidar using Equator
3:35 Viewing USGS lidar point clouds using Equator
4:25 Visual comparison of contour accuracy
5:40 Detailed comparison of different cross-sections in Excel
Keywords: Google Earth, contours, topography, lidar, USGS, point cloud, Equator
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