Tag: Data

The Geographic Names Information System (GNIS), developed by the USGS in cooperation with the U.S. Board on Geographic Names (BGN), contains information about…

The US Census Bureau makes available the 2002 TGER/Line files for free download. The TIGER/Line files are extracts of selected geographic and cartographic…

The US Fish and Wildlife service makes a number of digital spatial data products available to the public for free download. The data…

Digital Line Graphs (DLGs) are digital vector representations of cartographic information derived from USGS maps and related sources. Intermediate-scale DLG’s are derived from…

A digital elevation model (DEM) is a digital file consisting of terrain elevations for ground positions at regularly spaced horizontal intervals. The USGS…

So, you need to work with USGS data. Perhaps you need DRGs, maybe some DEMs, or maybe even some DOQQs. Before you begin…

This feature complements the original article "The GISuser‘s Guide to locating and downloading Free USGS data". It provides the reader with additional information…

(January, 2004) LIDAR Data Retrieval Tool (LDART) is a Web-based application that the NOAA Coastal Services Center developed to allow its customers, partners,…

Through the GeoBase portal, users with an interest in the field of geomatics have access to quality geospatial information at no cost and…

(Hundreds and hundreds of satellite scenes grouped into tiles have been painstakingly pieced together by Natural Resources Canada to create one huge photograph…