Libre Map Project
Encyclopedia
The Libre Map Project is an online collection of all digital USGS 1:24K scale topographic maps (as well as various other GIS data) covering the United States, available as a free download.
The Libre Map Project was started by Jared Benedict and around 100 additional individuals contributing money to purchase (or "liberate") a full set of 1:24K scale USGS topographic maps in Digital raster graphic
form . The map files were then hosted by archive.org to ensure the map data will continue to be freely available to everyone indefinitely . 56,000 maps in Digital raster graphic
form were acquired on DVDs for $1600 to make the data available . Additional data made available through the project includes SVG boundary files for every US state, Topologically Integrated Geographic Encoding and Referencing
(Tiger)/Line 2003 vector map data, and the USGS GeoNames
database .
The Libre Map Project was started by Jared Benedict and around 100 additional individuals contributing money to purchase (or "liberate") a full set of 1:24K scale USGS topographic maps in Digital raster graphic
Digital raster graphic
A digital raster graphic is a digital image resulting from scanning a paper USGS topographic map for use on a computer. DRGs created by USGS are typically scanned at 250 dpi and saved as a TIFF. The raster image usually includes the original border information, referred to as the "map collar". ...
form . The map files were then hosted by archive.org to ensure the map data will continue to be freely available to everyone indefinitely . 56,000 maps in Digital raster graphic
Digital raster graphic
A digital raster graphic is a digital image resulting from scanning a paper USGS topographic map for use on a computer. DRGs created by USGS are typically scanned at 250 dpi and saved as a TIFF. The raster image usually includes the original border information, referred to as the "map collar". ...
form were acquired on DVDs for $1600 to make the data available . Additional data made available through the project includes SVG boundary files for every US state, Topologically Integrated Geographic Encoding and Referencing
Topologically Integrated Geographic Encoding and Referencing
Topologically Integrated Geographic Encoding and Referencing, or TIGER, or TIGER/Line is a format used by the United States Census Bureau to describe land attributes such as roads, buildings, rivers, and lakes, as well as areas such as census tracts...
(Tiger)/Line 2003 vector map data, and the USGS GeoNames
GeoNames
GeoNames is a geographical database available and accessible through various Web services, under a Creative Commons attribution license.- Database and web services :...
database .