u.s. department of the interior u.s. geological survey mid decadal global land survey project...
TRANSCRIPT
U.S. Department of the Interior
U.S. Geological Survey
Mid Decadal Global Land Survey Project
briefing to the
ScanEx RDC 3rd International Conference,Earth from Space: The Most Effective Solutions
presented by
Steven CovingtonThe Aerospace Corporation
Landsat 7 Flight Systems Manager /Project International Coordinator /
MDGLS Phase I Lead
December 4-6, 2007
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ScanEx RDC, 3rd International Conference
Earth from Space: The Most Effective Solutions
December 4-6, 2007
The Landsat Satellite FamilyThe Landsat Satellite Family
Landsat 1-3 First Civil Land Remote
Sensing Missions Flown from 1972 – 1982 Primary Sensors:
Multi-Spectral Scanner (MSS) Return Beam Vidicon (RBV)
Landsat 4 and 5 Landsat 4 flown 1982 – 2002 Landsat 5 from 1984 – Present Primary Sensors
Multi-Spectral Scanner (MSS) Thematic Mapper (TM)
Landsat 7 Flown from 1999 – Present Primary Sensor:
Enhanced Thematic Mapper Plus (ETM+)
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ScanEx RDC, 3rd International Conference
Earth from Space: The Most Effective Solutions
December 4-6, 2007
Mid-Decadal Global Land SurveyMid-Decadal Global Land Survey
The USGS and NASA have worked together in the past to create three global surveys of the Earth’s landmass from orthographically-corrected satellite imagery centered on specific timeframes
Global Land Survey (GLS)1975, GLS1990 and GLS2000 The objective of MDGLS is to extend this series with a new global
land survey centered on a 2005-2006 epoch The Project has 2 Dataset Production Phases:
Phase 1: satellite tasking, ground station coordination, scene selection, data transfer, and ingest into the USGS archive
Landsat 5 & 7 TM and ETM+ data will be the primary sources of data Compatible ETM+ scenes will be used to makeup a composite pair
Other sensors: EO-1, ASTER, …
Phase 2: Process the collected data into an ortho-rectified dataset of virtually cloud-free scenes compatible with previous surveys
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ScanEx RDC, 3rd International Conference
Earth from Space: The Most Effective Solutions
December 4-6, 2007
Mid-Decadal Global Land SurveyMid-Decadal Global Land Survey
Past Survey Coverage Statistics 1970’s: 6,976 path/rows 1990: 7,037 path/rows 2000: 8,209 path/rows
MDGLS will increase total coverage to approximately 9,500 scenes
Inclusion of the Antarctic continent Better accounting of islands and reefs Full coverage of Arctic area in ‘ascending’ orbit
The MDGLS Scene Baseline includes 13,106 unique path/rows This number includes Antarctica, but doesn’t exclude the
geographic coverage overlap at high latitudes Antarctica accounts for 3589 Path/Rows (~1200 unique coverage) The final MDGLS unique scene count should be in the range of
9300 path/rows
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ScanEx RDC, 3rd International Conference
Earth from Space: The Most Effective Solutions
December 4-6, 2007
Scene Selection CriteriaScene Selection Criteria
Mid-decadal acquisition period of 2004-2007 (2005-2006: Prime)
Cloud Cover ≤ 10% ETM+ SLC-Off Composite Pair filler targeted at ≤ 5%
Landsat 7 Gap Closure of > 95% Assumes the allowance of a 2-pixel interpolation
Coverage Seasonality Green Season: a date criteria was developed that matched
the period when the NDVI was within 40% of its maximum value and dynamic range
Efforts are made to match acquisition dates with previous surveys to aid in land cover change analysis
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ScanEx RDC, 3rd International Conference
Earth from Space: The Most Effective Solutions
December 4-6, 2007
MDGLS Baseline CoverageMDGLS Baseline Coverage
Green = GeoCover 2000 CoverageRed = New MDGLS Coverage
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ScanEx RDC, 3rd International Conference
Earth from Space: The Most Effective Solutions
December 4-6, 2007
Landsat 5 International Cooperator Ground Station CoverageLandsat 5 International Cooperator Ground Station Coverage
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ScanEx RDC, 3rd International Conference
Earth from Space: The Most Effective Solutions
December 4-6, 2007
MDGLS Campaign Station LocationsMDGLS Campaign Station Locations
The Malindi and Yucatan stations came into service too late for inclusion in the GLS2005 dataset
Magadan
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ScanEx RDC, 3rd International Conference
Earth from Space: The Most Effective Solutions
December 4-6, 2007
Landsat 5 Global Archive Accessibility Landsat 5 Global Archive Accessibility
Tested Capability
Untested, but Compatible
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ScanEx RDC, 3rd International Conference
Earth from Space: The Most Effective Solutions
December 4-6, 2007
Landsat 5 Coverage in US ArchiveLandsat 5 Coverage in US Archive
Each of these areas meet initial coverage requirements based on metadata
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ScanEx RDC, 3rd International Conference
Earth from Space: The Most Effective Solutions
December 4-6, 2007
Archived L7 ETM+ Coverage Meeting Specification*Archived L7 ETM+ Coverage Meeting Specification*
Green = 2005/2006 CoverageYellowYellow = 2004/2007 Coverage * Meets metadata standards, but may not be
suitable for inclusion in the survey dataset
12
ScanEx RDC, 3rd International Conference
Earth from Space: The Most Effective Solutions
December 4-6, 2007
Before Production Begins…Before Production Begins…
The USGS and NASA have funded the reprocessing of the Tri-Decadal datasets (GeoCover) to improve the geometric accuracy
Terrain correction is being updated with Shuttle Radar Topography Mission (SRTM) data
Production process is being improved Reducing the number of error-producing tie-points between individual
blocks The products are now resampled to 15/30/60(120) meters
This reprocessing is now underway The 2000, 1990 and 1975 surveys will each be reprocessed The reprocessed data will be made available at no charge as it
becomes available This new and improved dataset will be used as control for all
future Landsat product ground control - including the GLS2005
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ScanEx RDC, 3rd International Conference
Earth from Space: The Most Effective Solutions
December 4-6, 2007
Production SequenceProduction Sequence
LGGS Delivery/MDGLS Processing: Landsat archive
Order IC Stations Campaign Stations1 North America Canada Chetumal2 Caribbean Chetumal3 Africa, Madagascar South Africa Maspalomas4 Eurasia China Japan* ThailandKiruna, Moscow, Irkutsk, Magadan5 Australia Australia6 New Zealand Australia7 South America Argentina Brazil Chetumal8 Indonesia Indonesia Thailand9 Greenland Kiruna
10 Japan Japan* China11 Iceland Kiruna12 Islands
No issuesLikely to proceed; issues in workUnlikely at present; issues in work
* Ingest capability unknown
ETM+ product will begin production in early 2008
TM products will begin production in mid-2008
All production completed by end of 2008
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ScanEx RDC, 3rd International Conference
Earth from Space: The Most Effective Solutions
December 4-6, 2007
Global Land Survey Distribution PolicyGlobal Land Survey Distribution Policy
Individual products will all be made available online at no charge
Products will become available soon after production Contributors to the Mid Decadal GLS2005 dataset will
receive a complete copy once production is complete All GLS data is available through the USGS for
download at no charge Go to http://glovis.usgs.gov/ For the Scene Collection, Choose ‘Landsat Decadal’
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ScanEx RDC, 3rd International Conference
Earth from Space: The Most Effective Solutions
December 4-6, 2007
Landsat Data Distribution Policy UpdateLandsat Data Distribution Policy Update
Select ETM+ data are being distributed at no charge as part of a Landsat Data Continuity Mission pilot project
What’s Included: New ETM+ acquisitions with less than 20% cloud cover and
quality scores of ’99’ from the US and Territories More geographic area will be added over the next 6 months,
eventually leading to global coverage Expanding Options
It is planned that by the end of Calendar 2008, all newly acquired SLC-off scenes will be made available for no charge using the standard product specification
Additional datasets will eventually be added, including Landsat 7 ETM+ SLC-on Landsat 4/5 TM Landsat 1-5 MSS
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ScanEx RDC, 3rd International Conference
Earth from Space: The Most Effective Solutions
December 4-6, 2007
Standard Product SpecificationStandard Product Specification
Pixel size: 15m/30m/60m (14.25/28.5/57m) Media type: Download (no cost), CD/DVD ($50) Product type: L1T (terrain-corrected) Output format: GeoTIFF Map projection: UTM Orientation: North up Resampling: Cubic convolution
Publically available terrain data used to produce Global Land Survey products will be made available at no charge
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ScanEx RDC, 3rd International Conference
Earth from Space: The Most Effective Solutions
December 4-6, 2007
Other DevelopmentsOther Developments
The Landsat Data Continuity Mission (LDCM) is scheduled for launch in mid-2011
It is currently planned that data products following the ‘standard specifications’ are made available at no charge
The U.S. Government is standing up a new organization; the National Land Imaging Program (NLIP)
This Program will be responsible for collection of civil land remote sensing data for the US archive
The Department of the Interior will manage the program A main goal of NLIP will be to ‘operationalize’ collection of
Landsat-class observations
U.S. Department of the Interior
U.S. Geological Survey
Thank You