Guides to the various file formats and tools for data format conversions. Find conversion utilities to convert from one GIS application to another.
Hypsography, topography, elevation, TINS, and contours. There are many different terms for data relating to elevation. This article reviews some of terminology and types of … Read more
Aerial photographs play an important role in GIS data acquisition and visualization. First, they help provide a solid visual effect. Many people are more able … Read more
Digital Raster Graphics are created and maintained by the United States Geological Survey (USGS). The maps have been scanned into digital format and contain topographical and survey information. Find resources here to understanding and working with DRGs. The first site to visit is the DRG homepage which contains information about DRGs and how to obtain them.
Image credit: NASA/GSFC/METI/ERSDAC/JAROS, and U.S./Japan ASTER Science Team NASA’s Advanced Spaceborne Thermal Emission and Reflection Radiometer (Aster) recently captured images of the Hayman fire burning … Read more
Centers of Population from 1790 – 2000 based on calculations by the US Census.
Jason-1 is a satellite to be jointly operated by NASA and CNES (Centre National d’Etudes Spatiales), the French space agency. Scheduled for launch no earlier than September 15th of this year, Jason-1 will work in tandem with TOPEX/Poseidon, a U.S.-French satellite in operation since 1992. TOPEX/Poseidon marked its ninth anniversary in orbit on August 10th, 2001.
If you are looking for comprehensive and free data for a project, California hosts a wide range of federal, state and local agencies that readily make their data available at no cost. Many of these datasets can be easily downloaded from the Internet. Most can be found in common GIS and CAD formats such as ArcView Shapefiles, ArcInfo export (.e00) or Microstation (.dgn) files.
Number of Fortune 1000 companies categorized by state for the year 2000. The list of total count of Fortune 1000 companies by state is ranked … Read more
About Algeria Maps and geographical information from the Geography Site at About. GIS Data Depot – Algeria Free data for Algeria for downloading from the … Read more