Getting and preparing USGS terrain using the free QGIS software
USGS has Digital Elevation Model GeoTIFF rasters as recent as 2020 with as small as 4 inch absolute vertical accuracy on smaller than a 1m resolution in some locations. QGIS is Free and Open Source Software. This video shows all the steps for a GIS newcomer to download, reproject, clip, and convert to feet a GeoTIFF with QGIS for use in Civil 3D, HEC-RAS, etc.
0:00 Intro
0:13 USGS The National Map Download product choices
0:59 Downloading a GeoTIFF
1:27 QGIS New Project
1:55 Leave at WGS84 for now
2:07 Add a background map (USGSTopo) ArcGIS REST Server connection and Layer
3:24 Zoom in and set project CRS
3:41 On-the-fly transformation
3:49 Add GeoTIFF Raster layer
4:07 Warp (Reproject) the GeoTIFF raster
5:43 Clip the GeoTIFF raster to view extents
6:13 Calculate the conversion from meters to feet
7:41 Show as contours
8:13 Check using USGSTopo
8:55 Check again using a survey point
9:48 Metadata: resolution and date
11:17 Comparing 1m, ORP, and Lidar
13:02 Comparing rendering Nearest Neighbor vs. Bilinear vs. Cubic
Watch video Getting and preparing USGS terrain using the free QGIS software online without registration, duration hours minute second in high quality. This video was added by user Tom Haws 16 August 2023, don't forget to share it with your friends and acquaintances, it has been viewed on our site 828 once and liked it 6 people.