June TerraSAR-X-based Flood Mapping Service

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Marshall Mosley
8 years ago
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1 June 2011 TerraSAR-X-based Flood Mapping Service

2 Service TerraSAR-X-based Flood Mapping Product Flood extent map Product specifications Flood mask / water mask Input / output data Summary Content Date - 2

3 Flood Mapping Service Rapid assessment of flooded areas assessment is essential in case of emergency Weather independent data acquisition such as via TerraSAR-X is a crucial benefit especially for floods (cloud coverage) Within 48 hours after data acquisition ASV GEO is able to provide accurate mapping & cartography of the flood extent Derived from current TerraSAR-X data the Flood Maps depict the extent of a flooding including distinction between flooded and probably flooded areas In addition, pre-event / reference data (TerraSAR-X or optical) are used to separate flooded areas from permanent water bodies The final product per TerraSAR-X scene is a water / flood mask in raster and/or vector format Date - 3

current TerraSAR-X data the Flood Maps depict the extent of a flooding including distinction between flooded and probably flooded areas In addition, pre-event / reference data

4 Flood Extent Maps TerraSAR-X-based Flood Extent Maps are high resolution products depicting the extent of a flooding event ASV GEO delivers two different Flood Extent Map products: Flood mask (Bi-temporal water mask) Water mask (Mono-temporal water mask) Differences: Consideration of two and one date(s), respectively Selected orbit for data acquisition (flood rapid; water predicted) Date - 4

(Bi-temporal water mask) Water mask (Mono-temporal water mask) Differences: Consideration of two

5 Flood Mapping Products Flood maps Documentation of flood extent at different dates (monitoring possible) Water / flood mask(s) + cartography Water masks - rapid Delineation of water extent for an emergency event Image delivery and position accuracy according to Rapid Orbit acquisition Water masks Delineation of the water extent at a given date Image delivery and position accuracy according to Predicted Orbit acquisition All deliveries consist of: Water / flood mask as vector file (shape format) Ready to print map (tif, pdf) Option: TerraSAR-X image as raster data (tif, img)

Water masks Delineation of the water extent at a given date Image delivery and position accuracy according to Predicted Orbit acquisition All

6 Date - 6 Product example

7 Date - 7 Product example

8 Date - 8 Product Specifications Flood Mask vs. Water Mask

9 Product Specifications / Input Data Water Mask Flood Mask Input data Temporal resolution Mono-temporal Bi-temporal Sensor TerraSAR-X (or TanDEM-X) Product Orbit Rapid (1-3 day delivery time, +/- 0.2m possible location error) EEC-RE Rapid Predicted (0-12 h data delivery time, +/- 700m possible location error) [Near Real Time delivery option] Mode SL, SM, SC Ancillary data SRTM DEM or other SRTM DEM or other Reference data Permanent water body shape (optional) Date - 9

2m possible location error) EEC-RE Rapid Predicted (0-12 h data delivery time, +/- 700m possible location error)

10 Product Specifications / Output Data Water Mask Flood Mask Resolution Temporal Bi- Mono- Geometric Depending on TerraSAR-X imaging mode Up to 1m (Spotlight), up to 3m (StripMap) up to 18m (ScanSAR) MMU Depending on TerraSAR-X imaging mode 0,1ha (SpotLight) 0,25ha (StripMap) 5ha (ScanSAR) MMW 40 m Delivery Content/format TerraSAR-X data (if requested) tif, img Flood Mask as vector file shp Map Tif, pdf Date - 10

Depending on TerraSAR-X imaging mode 0,1ha (SpotLight) 0,25ha (StripMap) 5ha (ScanSAR) MMW 40 m

11 Methodology - Description Semi-automatic generation of mono- or bitemporal water mask vector data sets by means of combination of object- and pixel-based classifications with subsequent automated change detection process in the case of bi-temporal water masks Final visual improvement of classification result close the workflow Date - 11

classifications with subsequent automated change detection process in the case of

12 Methodology Workflow (1/2) Pre-event data (TS-X archive, multi-mission) Post-event data (TS-X) Segmentation Semi-automated Classification Water detection Semi-automated Classification Water detection Automated refinement Final water masks extraction Date - 12 Regular water extent Flood extent

detection Semi-automated Classification Water detection Automated

13 Methodology Workflow (2/2) Calculation of segmentation parameters and segmentation: Automated procedure MMU Smoothness Automated refinements: Minimum Mapping Unit filter Smoothness of boundaries Classified scene Library workflow with user interaction QA no Manual editing yes User set value Export FLOOD SHAPE Date - 13

Mapping Unit filter Smoothness of boundaries Classified scene Library workflow

14 Summary Flood mapping service is based on and optimised for the use of TerraSAR-X data Service addresses pre- (permanent water) and postevent (flood) situations as well as monitoring purposes (e.g. in case of flood events over a longer period of time) Delivery of flood extent maps is possible within 48 hours after data acquisition Product delivery is according to general standards or customizable to specific requirements Date - 14

15 Thank you for your attention! Dr Marc Mueller Project Manager Risk & Crisis Service GMES & European Institutions BA4 Product Manager Disaster Management (acting) Product Management BA3 Development Line Coordination Disaster Management Development & Engineering BA3 Date - 15

Product Manager Disaster Management (acting) Product Management BA3

16 Date - 16 Product example

17 Date - 17 Product example

TerraSAR-X Applications Guide

TerraSAR-X Applications Guide Extract: Maritime Monitoring: Oil Spill Detection April 2015 Airbus Defence and Space Geo-Intelligence Programme Line Maritime Monitoring: Oil Spill Detection Issue As the