About | Contact | SUBMIT PRESS | Advertise | FAQ
Newsletters | Twitter |
HomeNewsArticlesExpertsDataJobsEDULBSEVENTSDIRBLOGSocialGeoJobs
Videos | Webinars | Social Media | Free Resources | iOS News | Android News | GISuser Newsletter  
advertisement

Top Geo News
Put Your News here! 

SEARCHING FOR a JOB?
GEOJOBS.biz

Rapidly Making Colorful Landsat-8 Imagery Composite with Free Advanced Image Stretching and Pan-sharpening Software from GeoSage - See more at: http://www.gisuser.com/content/view/30197/2/#sthash.36sxzlnJ.dpuf

Got news? TELL US...
submit press to GISuser

Social Connect




@GISuser

GISuser Sponsor


GISuser Videos


See also SpatialVideos Youtube

Recent Site Additions
GISuser Sponsor

GIS Job Opportunities
 

More at GeoJobs.BIZ!

GISuser Sponsor


Home     

TODAY IN THE GISuser SPOTLIGHT
Welcome to Spatial Media's GISuser.com A leading GIS, Geo-tech resource for GIS users & tech professionals. MUST See our iOS zone, Career Center, Social Media Tips, and ArticlesGet a Daily newsfeed via email

top newsUSGIF Keynote Lineup for GEOINT 2013* Symposium - What is Big Data? Every minute the world generates 1.7 million billion bytes of data, equivalent to 360,000 standard DVDs. More digitised data was created in the last two years than in the rest of human history. This trend and the mountains of data it produces is what we call "Big data". The big data sector is growing at a rate of 40% a year. 

What is Big Data? - Every minute the world generates 1.7 million billion bytes of data, equivalent to 360,000 standard DVDs. More digitised data was created in the last two years than in the rest of human history. This trend and the mountains of data it produces is what we call "Big data". The big data sector is growing at a rate of 40% a year.

HOT JOB
post a GIS job * JOBS *  Mapper - Surveyor Contract / Geodesign Manager, Redlands
See more jobs on GeoJobs.Biz
MOST RECENT GIS / GEOSPATIAL NEWS and ANNOUNCEMENTS

 View More Geospatial News
 View LBS News
 View Mobile / Wireless News
 Submit Your Press & announcements

More GISuser Features

Hands On First look - HP All in One Workstation - For the past few weeks I've been the user of a very sweet, and big, HP Z1 all in one workstation.  For those of you not yet familiar with the "all in one" devices from HP

Blogging, microblogging, media, social media or… Which for your business? You may be wondering, which would be better for me or my business.. blogging, social bookmarking, a social media focus, or ?? 

10 Considerations For Planing Your Next Hackathon -- Hackathons, all the cool kids are doing them! Yes indeed, with the plethora of opendata being made available to the masses there’s no better way to get started than to hack.

Super Bowl Transit Perks! Brand New NYC Subway Maps For The Super Bowl - There's no doubt that New York and New Jersey will be seeing some awesome economic benefits and perks as a result of hosting the 2014 Super Bowl.  

Awesome Maps and Data Visualizations from 2013 - I'm not calling this a "best" list as that's pretty tough to call, however, it is a fine list of sweet maps and data visualizations that we enjoyed and shared with the community during the first half of 2013

NOAA Report - Sandy, One Year Later - It's been one year since Sandy struck the Mid-Atlantic and Northeast coasts with powerful winds, rain, and storm surges that caused unprecedented damages in some of the nation's most populous areas. Sandy was unique in many ways. 

Mashing-up Opendata for a B.C Liquor Outlet Map with CartoDB - All the twitter chatter from #FOSS4G and the hype surrounding CartoDB got me wanting to mashup some data with the awesome open Geo tools out there so I decided to go look for some data and see what I could come up with. 

Mapping The Craft Beer Industry in America - The New Yorker has complemented their coverage with the release of a cool, interactive craft beer map (based on 2012 data) so you can see where the growth has spread, which States are drinking up, where the new breweries are located, and see all the fine breweries on the map!

    feature articlesSee more GISuser Features HERE / See GISuser Spotlights Here

    The GISuser Expert Corner

    directoryicon.jpgThis is a section devoted to providing our valued contributors with a corner to do whatever they like with and discuss Geo/Tech topics that are near and dear to them! Be sure to check out ALL of our experts for commentary, editorial, links, and advice! Interested in becoming a contributing expert? Contact us and tell us about yourself

     post your GIS job listing
     Browse All Listings / Post Your Job Ad

    or, send your job announcements to
     

    JPL - NASA Map Sees Earth's Trees in a New Light E-mail
    GIS News - R/S & Earth Imaging
    Written by NASA   
    18 February 2012

    A NASA-led science team has created an accurate, high-resolution map of the height of Earth's forests.


    PASADENA, Calif. -  The map will help scientists better understand the role forests play in climate change and how their heights influence wildlife habitats within them, while also helping them quantify the carbon stored in Earth's vegetation.

    Scientists from NASA's Jet Propulsion Laboratory, Pasadena, Calif.; the University of Maryland, College Park; and Woods Hole Research Center, Falmouth, Mass., created the map using 2.5 million carefully screened, globally distributed laser pulse measurements from space. The light detection and ranging (lidar) data were collected in 2005 by the Geoscience Laser Altimeter System instrument on NASA's Ice, Cloud and land Elevation Satellite (ICESat).

    "Knowing the height of Earth's forests is critical to estimating their biomass, or the amount of carbon they contain," said lead researcher Marc Simard of JPL. "Our map can be used to improve global efforts to monitor carbon. In addition, forest height is an integral characteristic of Earth's habitats, yet is poorly measured globally, so our results will also benefit studies of the varieties of life that are found in particular parts of the forest or habitats."

    The map, available at http://lidarradar.jpl.nasa.gov, depicts the highest points in the forest canopy. Its spatial resolution is 0.6 miles (1 kilometer). The map was validated against data from a network of nearly 70 ground sites around the world.

    The researchers found that, in general, forest heights decrease at higher elevations and are highest at low latitudes, decreasing in height the farther they are from the tropics. A major exception was found at around 40 degrees south latitude in southern tropical forests in Australia and New Zealand, where stands of eucalyptus, one of the world's tallest flowering plants, tower much higher than 130 feet (40 meters).

    The researchers augmented the ICESat data with other types of data to compensate for the sparse lidar data, the effects of topography and cloud cover. These included estimates of the percentage of global tree cover from NASA's Moderate Resolution Imaging Spectroradiometer on NASA's Terra satellite, elevation data from NASA's Shuttle Radar Topography Mission, and temperature and precipitation maps from NASA's Tropical Rainfall Measuring Mission and the WorldClim database. WorldClim is a set of freely available, high-resolution global climate data that can be used for mapping and spatial modeling.

    In general, estimates in the new map show forest heights were taller than in a previous ICESat-based map, particularly in the tropics and in boreal forests, and were shorter in mountainous regions. The accuracy of the new map varies across major ecological community types in the forests, and also depends on how much the forests have been disturbed by human activities and by variability in the forests' natural height. 

    nasa tree map

    Global map of forest height produced from NASA's ICESAT/GLAS, MODIS and TRMM sensors. The map will advance our understanding of Earth's forest habitats and their role in Earth's carbon cycle. Credit: NASA/JPL-Caltech
    › Full image and caption


    "Our map contains one of the best descriptions of the height of Earth's forests currently available at regional and global scales," Simard said. "This study demonstrates the tremendous potential that spaceborne lidar holds for revealing new information about Earth's forests. However, to monitor the long-term health of Earth's forests and other ecosystems, new Earth observing satellites will be needed." 

    Results of the study were published recently in the Journal of Geophysical Research - Biogeosciences.

    JPL is managed for NASA by the California Institute of Technology in Pasadena.

    Last Updated ( 18 February 2012 )
     
    < Prev   Next >

    Submit Your GIS/Geo News/PR

    MORE ARTICLES - Check out all the GISuser articles in the archive, stored by category
    Featured Events
    • Geoint Symposium 2014 - The GEOINT 2013* Symposium takes place April 14-17, 2014 at the Tampa Convention Center in Tampa, Florida.
    • FOSS4G 2014 - Put on by OSGeo, FOSS4G is the international gathering of open source and geospatial tribes. Join us in Portland, Oregon, USA, Sept 8th-12th
    • LiDAR users and potential users take not of a webinar titled Making Money with the Speed of Light covering such topics as Basic growth strategies for 3D imaging business success
    • State of the Map US - April 12-13, Washington DC

     List Your Event Here 

    THE GISuser Newsletter

    See Recent edition
    newsletter

    subscribe GISuser

    We won't share your address!
    Sponsor

    Popular Stuff!


    GISuser Site Sponsor


    GISuser HOT Spots!

    android tools

    Android Dev Tips

    Partner Sites

    lidar news
    lbszone.com

    amerisurv

    symbianone

    geojobs Geo jobs

    A Spatial Media LLC property




    Spatial Media, LLC ©2003 - 2013 All rights reserved / Privacy Statement