![]() The US Topo series is a latest generation of topographic maps modeled on the USGS historical 7.5-minute series (created from 1947-1992). We've added the US Topo series to topoView, giving users access to over 3 million downloadable files from 2009 to the present day. The NGMDB project is proud to assist the NGP in bringing these maps to the Web. Geologic and topographic mapping have a long tradition together (see 1888 report). ![]() This interface was created by the National Geologic Map Database project (NGMDB), in support of the topographic mapping program, managed by the USGS National Geospatial Program (NGP). TopoView shows the many and varied older maps of each area, and so is especially useful for historical purposes-for example, the names of some natural and cultural features have changed over time, and the historical names can be found on many of these topographic maps. The most current map of each area is available from The National Map. As the years passed, the USGS produced new map versions of each area. This mapping was done at different levels of detail, in order to support various land use and other purposes. In 1879, the USGS began to map the Nation's topography. ![]() When I try to plot it, I just see a random array of colored panels.TopoView highlights one of the USGS's most important and useful products, the topographic map. All the documentation I can find online says that satellite data usually comes in single color band raster layers that you can stack to get the composite image, but this shapefile I downloaded has a really confusing structure and I can’t figure out how to read it as a normal image (I’m using the raster and sf packages in R). ![]() (I was looking at an area including the US Northeast and tried both the L8 OLI/TIRS and L7 ETM+ layers from the Collection 1 Level 1 Landsat data.) I chose the shapefile as it seemed to be the best option–I’m just trying to get a basemap image. I followed these instructions (they’re very clear and helpful–thank you!) but when I reach the end and “click here to download results”, there is no geoTIFF option, just csv, shapefile, kmz, and some other random formats. ![]()
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