The OpenGov OpenData Portal - GIS Data Tips and Open Resources: DEM

Showing posts with label DEM. Show all posts

Thursday, February 26, 2009

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

Wednesday, August 13, 2008

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

Thursday, November 02, 2006

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)

Saturday, October 28, 2006

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/

Tuesday, October 24, 2006

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)
facilities
flood
hydrography
Orthophotos
Access RIGIS at http://www.edc.uri.edu/rigis

Wednesday, October 11, 2006

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/

Thursday, October 05, 2006

Minnesota Land Management Information Center

The LMIC has been responsible for developing a strategic plan for the Minnesota GIS - Minnesota's Spatial Data Infrastructure. Recent success stories include the acquisition of 2003 orthoimagery for the entire State (cooperatively funded by the state and the National Aerial Imagery Program of the Farm Services Agency) and they made data available at no cost to users. LMIC maintains the MN Geographic Data Clearinghouse - a LMIC program that serves as a "One Stop" source for geospatial data needed to power Geographic Information Systems. Be sure to see the raster clipping project for DOQQs, NAIP data, and other othophotos... see http://www.lmic.state.mn.us/chouse/index.html - for DRGs see here

Wednesday, September 27, 2006

Stephen F. Austin State University's FRI Lab (Texas)

What a score this resource is for Texas Data... here's just a sampling of what you can access:
Texas DRGs - 24k, 100k and 250k
1m digital orthos
SSURGO soils data
Contours
Seamless DEMs
TIGER data
and much more! This resource is a total score! Bookmark http://www.fri.sfasu.edu/pages/archives/gis_data/html/gis_data.html

Monday, September 25, 2006

Utah Automated Geographic Reference Center (AGRC)

The Utah Automated Geographic Reference Center (AGRC) provides a wide range of Geographic Information System (GIS) support to the State of Utah. AGRC strives to facilitate coordination among Utah GIS users and effective, efficient use of GIS resources. Available data products for download include DRG, DEM, DOQ, NED, FEMA data and much more. See
http://agrc.its.state.ut.us/

Atlas: The Louisiana Statewide GIS

Search to find mapping data such as Tiger files, geotiff images, and flood data including data from the Louisiana GIS CD. Use live index maps to download DEMs, DRGs and DOQQs for Louisiana - 2004 DOQQs available. See http://atlas.lsu.edu/

Friday, September 22, 2006

Processed SRTM 90m Digital Elevation Data (DEM) for the Entire Globe

The CGIAR-CSI GeoPortal is now serving up processed SRTM 90M Global DEM data. Digital elevation models (DEM) for nearly the entire globe, covering most of the countries of the world, are available for download on this site. The SRTM 90m DEM's have a resolution of 90m at the equator, and are provided in mosaiced 5 deg x 5 deg tiles for easy download and use. All are produced from a seamless dataset to allow easy mosaicing. These are available in both ArcInfo ASCII and GeoTiff format - see http://srtm.csi.cgiar.org

Thursday, September 21, 2006

The ARIA Project Providing Imagery for Arizona

This fine resource from the University of Arizona is an interdisciplinary resource system for digital image and map data for the Sonoran desert region, including the U.S. Southwest and northern Mexico. Users will find instructional and outreach activities in remote sensing and spatial analysis on integrated regional assessments as well as a wealth of data (DRG, DEM, DOQQs) for use in their GIS. In addition to countless research material and educational resources, users will find they are provided with access to plenty of data. Simply click on the "Images" link and you'll find more links leading to 24k, 100k, and 250k DRG, DEM, and imagery. Check it out at http://aria.arizona.edu/

Tuesday, September 19, 2006

KGS GIS Data - Kentucky

Access to all the geological survey's GIS data products including topos, DEMs, transportation data, soils, base maps, political boundaries, hydrology and more. See http://www.uky.edu/KGS/gis/kgs_gis.html

West Virginia State GIS Technical Center

The WV GIS TC has an ambitious goal to provide focus, direction and leadership to users of geographic information systems (GIS), digital mapping and remote sensing within the State of West Virginia. Data hounds will be pleased to find loads of freely available data products available here, in addition to many other useful GIS resources. At the heart of this portal for many users is the data access mechanism. Simply click the "GIS Data" link which will present a pull-down list with tons of thematic layers to select from. See http://wvgis.wvu.edu/index.php

ASTER Data (Advanced Spaceborne Thermal Emission and Reflection Radiometer)

ASTER satelite data can be used to generate Digital Elevation Models (DEMS) with 30m resolution. EOS archives the DEMs in its database so that they will be available immediately upon request.DEMs not available can be ordered. From the JPL - see http://asterweb.jpl.nasa.gov/

Kansas Geospatial Community Commons

The Kansas Geospatial Community Commons (KGCC) is an initiative of the Kansas GIS Policy Board and the Data Access & Support Center (DASC). KGCC is designed to be a place for state and local governments and the private sector to share & discover geospatial information & connect with the Kansas GIS community. Simply click the browse link to access a directory of available data products which include elevation products (LIDAR, NED), topo (DRGs clipped) , imagery (tons of imagery!) and more. See http://www.kansasgis.org (thanks to Beau for this suggestion!)

Florida GIS Data from LABINS

LABINS (Land Boundary Information System) has DOQQS, DRG, DEM, DLG, NWI, survey data (horizontal and vertical control) and much more for the State of Florida - See http://data.labins.org/2003/

Monday, September 18, 2006

MassGIS - Massachusetts GIS Data

MassGIS data contains pretty much any GIS dataset for Massachusettes that you could need. Conveniently organized by either raster of vector datasets you can spend hours here! ESRI Shapefiles, tiled by Town, USGS Quad, OQ Quad, Basin, Watershed, State, NE. See http://www.mass.gov/mgis/download.htm or http://www.mass.gov/mgis/ftpstate.htm

Texas DRGs - TNRIS Data Distribution System

Freely downloadble DRGs for all of Texas here on this resource from TNRIS. Simply click on a county, enter a quade name or enter the lat/long. Your hit will return downloadable 30m DEM or a 24k DRG file - See http://www.tnris.state.tx.us/digital.htm