Table of Contents
What is the Historical Topographic map collection?
The Historical Topographic Map Collection (HTMC) is a set of scanned images of USGS topographic quadrangle maps originally published as paper documents in the period 1884-2006. Both US Topo and HTMC maps can be downloaded free of charge through several USGS interfaces.
What are the current topographic map series?
1. US Topo is the current topographic map series. These are modeled on the legacy 7.5-minute maps, but are mass-produced from GIS databases and published as digital documents. 2.
Who created the topographic maps on Topozone?
The topographic maps on TopoZone were created by the United States Geological Survey (USGS) and have evolved for more than […] All of the topographic maps on TopoZone are displayed and printed with true north up. If you are using a […]
What is a USGS topographic map?
The USGS was entrusted with the responsibility for mapping the country in 1879 and has been the primary civilian mapping agency of the United States ever since. The best known USGS maps are the 1:24,000-scale topographic maps, also known as 7.5-minute quadrangles.
What types of topographic maps are available from the USGS?
Topographic maps are not the only cartographic products available from the USGS. The USGS publishes and distributes a variety of special-purpose maps. Some of these are topographic-bathymetric maps, photo image maps, satellite image maps, geologic maps, land use and land cover maps, and hydrologic maps.
How long does it take to produce a topographic map?
Producing an accurate topographic map is a long and complex process. It can take 5 years from the identification of a mapping requirement to the printing of a large-scale map like one of the USGS 7.5-minute, 1:24,000-scale quadrangle maps. This process requires a team of professionals and a series of closely coordinated steps.
How many USGS topographic maps are there?
The best known USGS maps are the 1:24,000-scale topographic maps, also known as 7.5-minute quadrangles. From approximately 1947 to 1992, more than 55,000 7.5-minute maps were made to cover the 48 conterminous states.
What’s new on OSM’s Mapbox?
Hot pink areas are newly mapped, blue and green areas are older. (There’s a zoomable version on Mapbox’s website). OSM’s database of more than 21 million miles of roads and 78 million buildings, keeps finding new uses, such as helping first responders to disasters like this year’s typhoon Haiyan in the Philippines.