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16/10/2017
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The fifth session of the Committee on Disaster Risk ReductionBangkok, 9-12, Oct. 2017
Vietnam Data Cube and potential applications
Lam Dao Nguyen
Ho Chi Minh City Space Technology Application Center (STAC)–VNSC–VAST
Vu Anh Tuan
Vietnam National Space Center (VNSC)–VAST
1. Data Cube Introduction
2. Data Cube plan and implementation
3. Potential applications
Contents
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Introduction
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Vietnam data cube plan and implementation
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• Infrastructure: by help of ISMG (I. M. Systems Group, Inc.)
• Software:
– Supports from CSIRO/CEOS
• Satellite Data:
– Landsats from USGS
– ALOS from JAXA
– Sentinel-1&-2 from ESA
• Applications:
– Rice monitoring
– Forest monitoring
– Water quality
– Etc.
• Pilot setup – 6-7 April 2017
• New Computer system by June, 2017
• Data developer training: July-Aug., 2017
• Technical development: Aug.-Oct., 2017
• Testing: Nov. 2017
• System working and workshop: Dec. 2017
• Expecting deployment: June 2018
Mekong Data cube: pilot cube of Vietnam Data cube: Landsat, Sentinel-1&-2, ALOS-2
1. More Data ingestions: Landsat, ALOS, Sentinel1,2• Landsat extends to whole country
• ALOS/PALSAR: MOU between VNSC&JAXA by Sep. 2017 for providing data limited to 50 scenes/year
• Sentinel 1,2: Over Mekong and Red Delta regions
2. Application Developments:• Forest: MOU between VNSC &FIPI
• Rice: ASIA RICE/GEOGLAM/ provincial partners
• Water: Looking for new partnership/ potential users
3. Visualization: User requirements
Data Cube plan and implementation
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Data cube will be VNSC’s core data architecture for becoming EO provider in Vietnam
VNSC will be an agency supplying 3 types of data sharing1. Raw data as from providers - free
2. Analysis ready Data (ARD) - free
3. Value added products to end users - commercial
Data Cube plan and implementation
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Applications
24/03/07
SAR data
σo of sampling fieldsGround-truth data
In situ rice yield Regression analysis Regression equation
Estimated rice yield distribution maps
Estimated rice production (P5)
Rice/Non-rice maps(P1)
Classification method Thresholding
Classification maps
Accuracy assessment Reference data Ground data
Asia-RICE products
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Mekong Delta
Source: Parry, M.L. et al., 2007
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Mekong Delta (Source: GSO, 2015): Area: 40,576 Km2 (1/8)
Population: 17.590 M (~1/5)
MD accounts for more than half (25.7 / 45.2 Mt) of the country’s rice production (>1/2)
The Mekong Delta, South of Vietnam is one of the most affected regions in the world by global warming. 2015
Sentinel-1 data over the Mekong Delta
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Every 12 days except few gaps
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Winter-Spring 2015 Winter-Spring 2016
Reduced area caused by shortage of water and saline water intrusion
Drought and saline intrusion
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At Mekong Delta (using radar and optical data)
Flood
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Flood inundation in Can Tho City
Analyzing medium resolution satellite data (Landsat MSS, TM, ETM+, JERS-1 andASTER) from 1972-2007 to identify rate and trend of spatial urban expansion.
Main direction of urban expansion has changed from North-west directions to South-west and South-east direction mainly due to development of transportation infrastructure.
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In 1960s
Urbanization and urban inundation in Can Tho City
In 2011
In 2011
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Erosion
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2006-2010 average velocityby L-band ALOS
2014-2016 average velocityby X-band COSMO-SkyMed
2014-2016 average velocityby C-band TOPS Sentinel-1
0-5-10-15-20-25-30mm/year
Land subsidence
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Lam Dao NguyenHCMC Space Technology Application CenterVietnam National Space [email protected]
VNREDSat-1 LOTUSAT-1
2013 2020