the pacific gis/rs user conference suva, fiji island, 27-30 november 2012
DESCRIPTION
The Pacific GIS/RS User Conference Suva, Fiji Island, 27-30 November 2012 Sharon R. Boe , SPC/GIZ-SOPAC ([email protected] ). 2012. SPC/GIZ Regional REDD+ Project: Forest Carbon Inventory In Vanuatu. Proposed Forest Mapping In Vanuatu. ABBREVIATIONS. - PowerPoint PPT PresentationTRANSCRIPT
The Pacific GIS/RS User ConferenceSuva, Fiji Island, 27-30 November 2012
Sharon R. Boe, SPC/GIZ-SOPAC ([email protected])
2012
SPC/GIZ Regional REDD+ Project:Forest Carbon Inventory In Vanuatu
Proposed Forest Mapping In Vanuatu
ABBREVIATIONS• SPC – Secretariat of the Pacific Community• GIZ – Deutsche Gesellschaft fur
Internationale Zusammenarbeit• REDD – Reducing Emissions from
Deforestation and forest Degradation• FCPF – Forest Carbon Partnership Facility• MRV – Measuring, Reporting and Verifying• REL – Reference Emission Level• GHG – Green House Gas• VANRIS – Vanuatu Resource Information
System
PROJECT OVERVIEW SPC/GIZ Climate Protection through
Forest Conservation in Pacific Island Countries Project >> Aim: mitigate greenhouse gas emissions from forestry and receive compensation payments.
Vanuatu: REDD readiness process mainly supported by:
>> SPC/GIZ – development of system for MRV carbon level and REL >> FCPF of World Bank – policy process
Ongoing Project until 2015
PILOT ISLANDS The islands of
Vanuatu are located approx. 2,200km east of Australia and comprises of 82 islands.
The program is focusing on 4 pilot islands:
1. Santo2. Malekula3. Efate4. Erromango
MAPPING ACTIVITIES
1) Delineation of coconut stands on Santo 20102) Deforestation processing Santo 2007-20103) Cloud correction Santo 1990-20004) Deforestation processing Santo 2000-2007-
20105) Accuracy assessment Santo 2010
Forest stratification (GHG Inventory, 2011)
AVAILABLE IMAGERY
Corresponding Mapping Product and Remarks
Sensor TypeSpatial
ResolutionSpatial
Coverage Temporal Coverage
Vanuatu Department of Lands and Survey: Topographic Map of Vanuatu
NEXTMap TopoSAR ORI
Orthorectified radar image
1.25m Wall-to-Wall 2003
Acquired by GIZ from Digital Globe
ALOS PalsarL-Band radar dual-pol FBD
25m Wall-to-Wall2007, 2008, 2009, 2010
Acquired by GIZ under the ALOS Science Program Phase 3
World View 2Multispectral
optical2m 11 Scenes 2012
WORLD VIEW 2 DATA
8 band bundle data (Santo)- Multispectral: 2m- Panchromatic: 0.5m
Projection: UTM/WGS84, zone 58S Pre-processed (atmospheric correction,
pan-sharpened (NC & FC), image enhancement, backdrop)
Digital Terrain Model (DTM): 25m
ALOS PALSAR DATA ALOS (Advanced Land Observation Satellite) PALSAR (The Phased Array type L-band
Synthetic Aperture Radar) 25m Mosaic dual polarization Data was ordered at Level 1.5 format Dual temporal change detection and forest cover Adv: Cloud-free, Day & Night and All weather land
observation Training: 16-19 October 2012
SAR Image Preprocessing, Enhancement, Classification (Erdas 9.1)
Support from Jaxa
HH Polarization• Very low backscatter of water• High backscatter in Urban Areas• High backscatter over vegetation and
non-vegetation
HV Polarization• High backscatter over vegetation areas• Low backscatter over non-vegetation
areas
HH/HV Ratio• Forest/Dense Vegetation (bright)• Non-Vegetation Areas (dark)
+
+ =
RGB• R: HH• G: HV• B:HH/HV
ALOS PALSAR RGB COMPOSITE
Visible on most of Western Part of Santo: high altitude areas
Layover Effects
CHALLENGES WITH CURRENT RADAR DATA
PROHIBITS IMAGE ANALYSIS
Spatial Modeler, Erdas 9.1
HH/HV Ratio Calculations Classification Conversion of amplitude data (DN) to radar
cross-section (dB) Above Ground Biomas (AGB) Calculations
Semi-Automatic Forest Classification
Move into the use of semi-automatic classification for forest mapping:
- Vanuatu Study (2007) conducted by Martin Herold and his team• Supervised Classification
- Maximum Likelihood Algorithm• Challenges
- Trial Image Segmentation • E.g. Imagine Objective ext. for Erdas
DELIVERABLES
The project envisions the following results for Vanuatu:• Forest cover based on an approved
national forest definition• Carbon density map for 5 generic forest
strata (medium height forest [open/closed], low forest [open/closed], mangroves)
• Validated forest cover map using very high resolution imageries
THANK YOU