The United States Geological Survey (USGS), a civilian Federal agency, produces several national series of topographic maps which vary in scale and extent, with some wide gaps in coverage, notably the complete absence of 1:50,000 scale topographic maps or their equivalent. The largest (both in terms of scale and quantity) and best-known topographic series is the 7.5-minute or 1:24,000 quadrangle. This scale is virtually unique to the United States and offers a convenient relation to customary units of measure where 1 map inch equals 2,000 actual feet. USGS also publishes 1:25,000 maps for metric uses, 1:100,000 maps covering 30 minutes latitude by one degree longitude, 1:250,000 covering one by two degrees, and state maps at 1:500,000 with California, Michigan and Montana needing two sheets while Texas has four. Alaska is mapped on a single sheet, at scales ranging from 1:1,584,000 to 1:12,000,000.
The Centre for Topographic Information produces topographic maps of Canada at scales of 1:50,000 and 1:250,000. They are known as the National Topographic System (NTS). A government proposal to discontinue publishing of all hardcopy or paper topographic maps in favor of digital-only mapping data was shelved in 2006 after intense public opposition.
Posted by Jorg Mohnen |
On 30 Jan 2015 |
Updated on 01 Feb 2015 |
Since we started selling WavGen Pro software with our Authorize.NET partnership and Bank of America Merchant system back in 2003, we proudly annouce the 10,000th online sale made in Portugal today. Its been a wonderful growth process. Since the 1990's where we honed in on 3D Terrain Visualization wortk flows, and since moving to Los Angeles to take part in software development in the VFX and Graphics industries, we now have a full product portfolio including the licensing of massive geospatial imagery.
WavGen Incorporated sells and licenses many different types of satellite data, geodata, p..
We welcome all to our booth number 211 near AutoDesk and ESRi at this years SIGGRAPH 2015 trade show in Los Angeles. We will be demonstrating our WavGen Pro software on 4xHDPS PODs and will be streaming many of our television and large format feature film productions. We will also be demonstrating and licensing our large selection of geospatial data of the earth on planetary systems.
The SIGGRAPH conference and exhibition is a five-day interdisciplinary educational experience including a three-day commercial exhibition that attracts hundreds of exhibitors from around the world. SIGGRA..
EarthOnDrive & WavGen have recently partnered with Battlespace Simulatons Inc., to provide a rich geospatial data environment using 15m Landsat Imagery, and very high resolution CONUS aerial imagery for tactical and ground based military and defense simulations. GIS-enabled: Pan, Scale or Zoom anywhere on Earth. Support for all the most common GIS formats, including NGA's aeronautical charts (GNC, JNC, ONC, TPC) in CADRG format; GeoTiff and Vector formats (VPF and SHP).
BSI provides world-class, PC-based simulation solutions, including MACE, the flagship product providing comp..
Produced by the Environmental Systems Research Institute (Esri, formerly ESRI), the Esri International User Conference (Esri UC) is the worlds largest event dedicated to geographic information system (GIS) technology. The 2015 Esri User Conference (UC) July 20-24 2015 will be held at the San Diego Convention Center in San Diego, California. The Esri UC dates back to 1981. In 2008, conference attendance grew to more than 14,000 attendees.
The conference offers more than 600 GIS user presentation sessions, 300 exhibitors, 275 technical workshops, 100 special interest, regional, and user group..