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The Global Land Cover Facility Presentation for WGISS-25 February 26, 2008 University of Maryland,...
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Transcript of The Global Land Cover Facility Presentation for WGISS-25 February 26, 2008 University of Maryland,...
![Page 1: The Global Land Cover Facility Presentation for WGISS-25 February 26, 2008 University of Maryland, Department of Geography.](https://reader035.fdocuments.us/reader035/viewer/2022062802/56649ea25503460f94ba60ff/html5/thumbnails/1.jpg)
The Global Land Cover Facility
Presentation for WGISS-25
February 26, 2008
University of Maryland, Department of Geography
![Page 2: The Global Land Cover Facility Presentation for WGISS-25 February 26, 2008 University of Maryland, Department of Geography.](https://reader035.fdocuments.us/reader035/viewer/2022062802/56649ea25503460f94ba60ff/html5/thumbnails/2.jpg)
What is the GLCF?
A Non-Governmental Science Information Center• Making quality Earth science data easily available to researchers• Developing tools for data access and data sharing• Innovating visualizations for spatial data• Land cover research & production
A research facility sponsored by NASA & University of Maryland • Joint activity between the University of Maryland Institute for
Advanced Computer Studies (UMIACS) and Geography Department• John Townshend = Director• NASA MEaSUREs, REASoN, ESIP, ACCESS, EOS, ESDS programs
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Data Collections Available
Data Collections
• Earth observation imagery and land cover products
• Landsat scenes
• MODIS composites
• ASTER
• IKONOS, QuickBird
• SRTM
• AVHRR – derived land cover products
• MODIS – derived land cover products
• Landsat – derived land cover products
• special collections
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Data Access Policies
Data Access Policies
• All data is free to any user via anonymous FTP
• Registration is not required to access 95% of archive
• Archive is reliable
• Archive is available 24/7
• Customer support provided
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Collections Policies
Collections are:
• Earth observation imagery useful to generating land cover products
Or
• land cover products derived from Earth observation imagery
• peer reviewed and/or supported by extensive methodology, calibration and validation documentation.
• accompanied online by helpful web pages with standardized, brief overview information
• supported through GLCF customer service
![Page 6: The Global Land Cover Facility Presentation for WGISS-25 February 26, 2008 University of Maryland, Department of Geography.](https://reader035.fdocuments.us/reader035/viewer/2022062802/56649ea25503460f94ba60ff/html5/thumbnails/6.jpg)
Formats & Interoperability
Format Policies:
• Formats make a big difference to users – make it easy
• GeoTIFF, WGS84, UTM/Geographic
• Reformat of SRTM & MODIS layers to community need
• Consider Earth science community format needs, but also:– Earth scientists in GIS community
– other GIS users
– conservation scientists
– land managers (planners, local govt)
– academics (teaching materials)
– commercial users (realtors, graphic artists, insurance,
utilities, news media, transportation planners.
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Simple, Effective Visualization Application
A primary application was developed at GLCF for accessing spatial data collections visually: the Earth Science Data Interface (ESDI).
Goal to provide easy access:• registration not required• minimal clicks to actual data• improved previews• reliable• ESDI can be bypassed to FTP• no fees = quick access
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Application and Data Discovery Development
Goal of making data easy for user to access:
• Continue to enhance ESDI, often per user requests
• A suite of applications designed for online processing of imagery into land products: the Land Cover Change Community-based Processing and Analysis System (LC-ComPS) (J.Masek PI). Also designed for free reuse.
• data grids (SRB, Globus), OPeNDAP, “sister” sites
• The GLCF has developed applications for the collection of performance metrics and success stories so that government or business managers can better recognize their project activities.
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Distribution of Spatial Data
15 TB available
807 TB distributed
57 million hits(Jan 31, 2008)
Of the last 2.5 million visits,GLCF logs only identified 51% of domains.Of those domains, the following were recognized:
Since 2003,downloads have shiftedfrom 90% US domains to 65% non-US domains
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GLCF Land Cover Activities
Land Cover Focus
• Regional and global forest cover and forest cover change products
Deforestation Mapping Group
• semi-automated techniques for processing 30 meter resolution Landsat imagery into FCC products
• products for Central Africa, the non-Brazilian Amazon, Paraguay
Development of land cover automation techniques
• Current research and development of Support Vector Machine (SVM) processing of Landsat and ASTER imagery into FCC products.
19891989
19991999
FCC ProductFCC Product
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GLCF Achievements: UNEP Distribution
• US Government policy to distribute Landsat GeoCover collection for free through UNEP
• Each developing world nation received a free subset of the collection covering their area on hard drives
NASA/USGSGeoCover data
UMD GLCFformatting, packaging
UNEPdistribution
Nationsdata used
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GLCF & IGSNRR Cooperative
Since 2005, the GLCF has cooperated in an agreement with a sister institution at the Institute of Geographical Science and Natural Resources Research (IGSNRR) in Beijing whereby:
http://glcf.geodata.cn
John Townshend from the University of Maryland signed a data exchange agreement with Liu Jiyuan, Director General of the Institute of Geographical Sciences and Natural Resources Research in the People's Republic of China, on September 3, 2005.
• GLCF provided a copy of the 3.5 TB, 3-epoch, global coverage, Landsat GeoCover collection to IGSNRR on hard drives – free. • IGSNRR put the data online in Chinese, on their country’s Internet. • GLCF receives volume metrics• GLCF will receive collections of non-NASA data and products from the sister group to provide in English via GLCF systems.
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http://glcf.geodata.cn
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Future GLCF Directions
• Updated collections access• Continuing work in online LC application development• Continuing work in data discovery research: Lattice Grid, Sisters, OGC• Continuing work with collaborators in Earth science & Conservation• Continuing research in LC modeling and production, including
–ASTER program products to include 2005 NA FCC & composites–MEaSUREs program products will include:
•Global fine resolution (< 100 m) surface reflectance ESDR for three epochs centered around 1990, 2000, and 2005; •Fine resolution (< 100 m) forest cover change (FCC) ESDR between the three epochs; •Fragmentation products derived from the fine resolution FCC products; •Global 250-m vegetation continuous field (VCF) based FCC ESDR for 2000 to 2005; •FCC products to 250 m, 500 m, 1 km, and 0.05° grids for use by carbon, biogeochemical and hydrological modelers; •Subsets of the above products for protected areas of the world and their buffer zones.
–All will be made available online with free access
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Visit the GLCF
www.landcover.org
Earth observation data & products: • Available 24 hours per day, 7 days per week• Free• No registration required