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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 ServiceBrad.Doorn@usda.gov

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 Servicebrad.doorn@fas.usda.gov

Photo by Dr. Curt Reynolds