Mid Decadal Global Land Survey Project

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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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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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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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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December 4-6, 2007

MDGLS Baseline CoverageMDGLS Baseline Coverage

Green = GeoCover 2000 CoverageRed = New MDGLS Coverage

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December 4-6, 2007

Landsat 5 International Cooperator Ground Station CoverageLandsat 5 International Cooperator Ground Station Coverage

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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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December 4-6, 2007

Landsat 5 Global Archive Accessibility Landsat 5 Global Archive Accessibility

Tested Capability

Untested, but Compatible

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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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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

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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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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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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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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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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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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

Mid Decadal Global Land Survey Project

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