Experience A breathtaking virtual tour of China’s supercave from National Geographic

Image venturing through one of China’s scenic wonders, a massive cave full of cone shaped peaks, arches, and the world’s largest cavern! Well, thanks to National Geographic you can now sit back in your chair and go on a virtual exploration and enjoy it all, complete with details of how laser scanning technology was used to capture is all in amazing detail!

breathtaking virtual tour of a supercave -- new from Nat Geo's July issue
breathtaking virtual tour of a supercave -- new from Nat Geo's July issue

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Spot Image filling in Gaps in Alaska DEMs

Spot Image has a cool solution to fill in Gaps in Alaska DEM products… The company is boasting details of a recent completion of thirteen Reference3D geocells over the Chugach National Forest region of Alaska. These geocells are notable, as they provide the first broad area, DTED-2 quality DEM coverage in Alaska. See details here

Governor Schwarzenegger and team roll out CalAtlas Geospatial Clearinghouse

A new spatial clearinghouse at CalAtlas was rolled out today by “The Governator”… The innovative approach to technology, called Cal-Atlas Geospatial Clearinghouse will allow the general public to access maps, data and information that has not previously been accessible on a single site or from a single source. Of interest, CalAtlas is reported to be a portal to help organizations work together on GIS data and share the costs of acquiring imagery and other kinds of geospatial data – make sure you check out the link to download data from CaSil where you’ll find tons of imagery including NAIP, Landsat imagery, DOQQs and much more! You can even grab all the DRGs you want in MrSID or TIFF… sorry DataDepot, your 1990s era data repository is quickly being replaced by all these fine web services that are data-rich, fast, simple to use… and Free! See more details

CalAtlas - http://atlas.ca.gov
CalAtlas - http://atlas.ca.gov

DEM 101 – What is a Digital Elevation Model?

An interesting class for those of you looking to learn more about Digital Elevation Models (DEM). Enjoy this archived webinar from Intermap, sit back in your office and enjoy! Details… As the fields of digital mapping and geospatial analysis continue to grow, the use of three-dimensional data is becoming more widespread. One of the most common types of 3D data is digital elevation models or DEMs. In this webinar, we’ll talk about what DEMs are and how they differ from other types of spatial data. We’ll also look at some of the sources of DEM data, their quality, and how they are generated. Lastly, we’ll look at examples of how you can use DEMs in sophisticated geospatial analysis to solve real-world problems. See the webinar here

ICSM Guidelines for Digital Elevation Data

ICSM has released a new publication titled ‘ICSM Guidelines for Digital Elevation Data’. The aim is to provide guidelines and recommendations for acquiring elevation data depicting the earth’s surface based. It represent a first cut in the preparation of best practice for Australia and have been prepared as an outcome of a review of existing available material from around Australia and selected countries. It was prepared under the auspices of the National Elevation Data Framework (NEDF) initiative. See http://www.icsm.gov.au/icsm/elevation/index.html

Florida Geographic Data Library – FTP downloads and more

Looking for Florida GIS data? No qworries… this awesome resource provides FTP access to pretty much any data layers you can thionk of.. including DRG, DEM, DOQs, and much more! County Data Layers. (including Shapefiles, Aerial Photos, DRGs, DOQQ 3-meters) Shapefiles are under the “core” folder for each county. http://www.fgdl.org/download/ – there’s also an ArcIMS metadata explorer/service available.

Free data tip – USGS DEMs (SDTS) for the western states

A nice score here for those in need of USGS DEMs for the western states…. DIGITAL ELEVATION MODELS OF THE WESTERN STATES . Simply click through the map UI, select an area of interest, then download the DEM
CALIFORNIA 7.5 minute DEMs by map (native format)

USGS Seamless data server

In a recent reminder from sommeone at the USGS, I have to admit that I have neglected to promote this fabulous data resource. Most users know about it (or should know about it), therefore, as a result it sometimes gets forgotten. Thing of the seamless data distribution system as the grand-daddy of the USGS geospatial repositories… and then some! This site has complete coverage of theNational Elevation Dataset that supercedes Digital Elevation Models, complete DOQQcoverage, over 30 Tb of urban imagery, one-time coverage of full resolution Landsatimagery, and much more. Also, the data are seamless, so you can put a box aroundthe data without having to figure out quadrangles and then having to assemble themall. Here’s some details from our friends at the USGS if you need to hear more…
Free downloads are availble – up to 1.6 Gbytes of data in 100 MB files in one user request. Users have unlimited access to the interactive map and can make unlimited requests.The amount of coverage area depends on the number of products selected for download.For example, if NED 1 Arc Second is selected as the only product a user can downloadup to a 30 square degree area. But, if NED 1 arc second and NED 1/3 arc second areselected, then the area available for download will be considerably smaller. To seethe various sizes of coverage area for each product, click on the List of Productsdrop down, select the desired product. User can define an area of interest by drawing a box, defining coordinates, or useavailable templates to cut out the area. The first method of drawing a box (square or rectangle) is best for defining ageneral area. The coordinates are displayed, in decimal degrees, in the bottom leftcorner of the window as the mouse is moved over the map. The second method ofdefining coordinates can be used when the user wants a precise area and knows thecorner coordinates. The third method is the use of provided templates, such as 7.5min quadrangles. Bookmark this one, or maybe even set it as your homme-page! http://seamless.usgs.gov/

Rhode Island Geographic Information System (RIGIS

The RIGIS mission is to monitor, coordinate, and provide guidance for activities related to the use of geographic information system technology in Rhode Island, to support initiatives to implement or use this technology, and to manage and provide access to a comprehensive database of geographically referenced information. Plenty of data is available including 1:12,000 true color orthophotography from Summer 2003 with a 1 meter pixel resolution. Numerous data themes are available including:
Boundaries (municipal, shoreline, villages)
Coastal resources
Cultural data
Demographic data
Emergency (911)
DEM (30m)
Access RIGIS at http://www.edc.uri.edu/rigis

Montana Geographic Information Clearinghouse

Gerry from the Montana State Library provided us with an update about this fabulous free data resource for the State of Montana. Downloadable datasets include soils data, DEMs, topos, aerial photography, cadastral data and more. Features of the site include a simple but effective data list, a very cool data bundler, and the topo finder.. bookmark this one! http://nris.mt.gov/gis/