Integrating AWiFS and Quickbird Data in Iraq · Integrating AWiFS and Quickbird Data in Iraq United...
Transcript of Integrating AWiFS and Quickbird Data in Iraq · Integrating AWiFS and Quickbird Data in Iraq United...
Integrating AWiFS andQuickbird Data in Iraq
United States Department of Agriculture (USDA)Foreign Agricultural Service (FAS)
Office of Global Analysis (OGA)International Production Assessment Division
(IPAD)http://www.pecad.fas.usda.gov/
Dr. Bradley Doorn, PhDDirector IPAD
USDA Foreign Agricultural [email protected]
Photo by Dr. Curt Reynolds
Objective:
Develop a rapid response framework for generating cropcondition information at the national and regional level.Program efforts and image acquisition are supported by theNational Geospatial Intelligence Agency (NGA) with anunderstanding to create timely, accurate, and analyticalagro-centric products that can be implemented in thecurrent environment and extended to similar regionsaround the world.
Iraq Operational Agricultural Monitoring Project
Problems:
• Validate host country agricultural production statistics
• Baseline data limited to nonexistent
• Hazardous environment for ground truth data collection
Solution:
• Multiple resolution data integration (AWiFS and Quickbird)
• High resolution image-based ground truthing
• Contextual information to validate AWiFS analysis products
• Quickbird derived training data used for AWiFS classification
Iraq Operational Agricultural Monitoring Project
Digital Globe Quickbird Imagery:Image-based Ground Truth
Areas of Interest
• 17 AOIs representQuickbird imageacquisition
• 4 Collects per AOIthroughout theseason
• AOIs based uponGeocover LC croplayer
• AOIs distributedthroughout wintergrains region
Comparison of AWiFS and Quickbird Coverage
Temporal Coverage
• AWiFS 6 – 24 dayRepeat Coverage
• Quickbird 4 collectsper AOI duringseason
Spatial Coverage
•AWiFS 350 kmswath width with 56-m resolution
•Quickbird 13 kmswath width with2.44-m resolution.
Data Sources Applied to Regional Scale Analysis
Coarser resolution agrometeorologicalproducts indicated that drought
conditions were severely affecting cropproduction in Iraq, but ground
information was unavailable to confirmfindings at a large scale.
Data Sources Applied to Regional Scale Analysis
2008/09
2007/08
2006/07
2005/06
2004/05
Average
Legend
Northern Iraq (Cumulative Precipitation)
Northern Iraq (NDVI Time Series)
Time series data were also pointingtoward drought conditions withbelow normal precipitation and
NDVI. True ground information wasunavailable to confirm findings.
AWiFS NDVI Composite: April Peak Crop Greenup
• April NDVI suggestedsparse to no cropcover in Ninawa
• Ninawa is largestwinter grainsproducer
• No ground reportswere available forverification
• Reports of functioningirrigation, but fieldverification was notavailable.
AWiFS SASR Composite: April Peak Crop
HierarchicalAnalysis
• AWiFS compositesuggested no cropemergence inNinawa
• Quickbird imageryvalidates AWiFScomposite with nosign of near infraredreflectance.
• NDVI comparisonconfirms crop failurein most of Ninawaprovince.
AWiFS SASR product developed by GDA Corp Digital Globe Quickbird (False Color Infrared)
Quickbird Contextual Information: At Ta’mim
AWiFS SASR product developed by GDA Corp Digital Globe Quickbird (False Natural Color)
HierarchicalAnalysis
• High resolutionimagery aided indistinguishingworking and fallowfields
• Easily discriminatesagriculturalvegetation fromnatural vegetation
•NDVI comparisonused to evaluateAWiFS product.
NDVI Composite(April, 2008)
AWiFS IRS P-6 (56-meter)
AWiFS NDVI Composite: Salah ad Din (April 2008)
AWiFS NDVI indicated cropland parcelswith healthy and abundant vegetationand apparent center pivot irrigation.
Quickbird (2.4-meter)
Quickbird NDVI Composite: Salah ad Din (April 2008)
Quickbird NDVI confirmed healthycropland and center pivot irrigation.
April 2nd, 2008 June 18th, 2008
April 1st, 2008 June 25th, 2008
April 2nd, 2008 June 18th, 2008
April 1st, 2008 June 25th, 2008
AWiFS Classification: Quickbird-derived Training Data
Winter Grains
LEGEND
CART Algorithm
High resolution Quickbird imagery used intraining site development for supervised
classification of AWiFS data.
Integrating AWiFS andQuickbird Data in Iraq
United States Department of Agriculture (USDA)Foreign Agricultural Service (FAS)
Office of Global Analysis (OGA)International Production Assessment (IPA) Division
http://www.pecad.fas.usda.gov/
Dr. Brad Doorn, PhDDirector IPAD
USDA Foreign Agricultural [email protected]
Photo by Dr. Curt Reynolds