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 18 May 2018 |
Updated on 18 May 2018 |
Development of the OLI-2 and TIRS-2 instruments is progressing, and both are on target for integration with the spacecraft in mid-2019. The instruments are rebuilds of those onboard Landsat 8; however, TIRS-2 has improved stray light performance through improved telescope baffling and improved position encoder for the scene select mechanism, both issues on the Landsat 8 TIRS instrument. The Landsat 9 ground system and Mission Operations Center (MOC) are progressing through their respective milestones. Landsat 9 remains on schedule for a December 2020 launch from Vandenberg Air Force Base..
Join us with our Drone Swarm Mapping technologies at the NAB in Las Vegas this year. Drones are flying at there own Aerial Robotics and Drone Pavilion this year. Don't forget to attend a number of sessions including aerial cinematography techniques, live broadcasting and US Part 107 certification. Our attendees will get to see our new product launches including electronics for swarm mapping and our SDK's based on Positioning, Ethereum, FCL, Mavros, OctoMap, OMPL, ROS, and web3.
NAB Show 2018 is home to the world’s largest collection of vendors driving the future of media and entertainment. ..
EarthOnDrive will be presenting its latest technologies and mapping software at the GeoBusiness, U.K. on May 22-23, 2018. The GEO Business show has grown every year since its inception, and the 2018 show looks set to be the most successful show to date with more exhibition space and a brand new seminar program. The event will return to the Business Design Centre, in London, UK, May 22-23.
Since its record-breaking 2017 event last year, which welcomed 2,386 geomatics and geospatial professionals from around the world (a 48 percent increase since the launch in 2014), the exhibition has expand..
Developers of the first real-time ray-tracing and global illumination Texturing Solution based on wavelet theory, WavGen Pro allows computer graphics users working with Maya 2017/18 and 3D Studio Max 2017/18 3D the abilithy to model, render, and animate literally terabytes of imagery and thousands of hypershade nodes. WavGen announces new and updated plugins for Linux, OSX, and Windows, that further integrate wavelet technologies with Autodesk’s line of 3D modeling, rendering, and runtime applications. We now have exporter plugins for work flows in gaming (Unity, Scene Graph, Unreal, Cry..