HAITI, Tropical Storm "Jeanne", 21-24 September 2004
CLOSE-UP OVER SPECIFIC TOWNS
Speckle filtered RADARSAT-1 images, and the maps below, are processed by ParBleu Technologies Inc.
All images and maps are produced in cartographic projection UTM WGS 1984 (Zone 18).
The spatial resolution is 12.5 meters x 12.5 meters.
To provide an information as complete as possible, two maps are provided for every single town :
- A map formed by a colour composition of the three speckle filtered RADARSAT-1 images (16 July 2003, 24 September 2004 and 30 September 2004), to inform about the changes experienced by buildings and houses;
- A panchromatic (i.e. black and white) LANDSAT-7 map, with the changes detected during the event superimposed in colours, to inform about the changes experienced by the surrounding environment.
Notes for the interpretation :
- RADARSAT-1 multitemporal colour composition : The bright dots (whatever their colour) on the following satellite radar images (with the exception of the ones located on the crests of the mountains), correspond to the presence of houses or buildings.
Therefore, the interpretation keys that are given in the following apply only to these bright dots, which correspond to housing and infrastructures.
The variation of tones within extended areas --and particularly within the mountains-- must not be interpreted according to these keys.
- "LANDSAT-7 + Change detection" maps : Colours correspond to areas where significant changes are detected in the RADARSAT-1 time series. On the other hand, grey tones correspond to areas where no significant changes are detected.
GONAIVES
The size of the area shown is 11.0 x 7.0 kilometers.
UTM geographic coordinates (WGS 1984 Zone 18Q) :
- upper left corner : northing = 2156290 / easting = 739181
- bottom right corner : northing = 2149290 / easting = 750181
Interpretation of the RADARSAT-1 colour composition :
- Pink: flooded by mudflows on September 24th; mud sedimentation observed on September 30th.
- Green: areas totally flooded by water on September 24th; water had recessed on September 30th.
- Blue: population moves; new emergency settlements on September 30th.
- Red: total destruction.
- White: untouched buildings.
Interpretation of the "LANDSAT-7 + change detection" map :
- Violet & pink: Areas flooded or water-saturated during the whole observation period (24-30 September).
- Blue: Areas flooded or becoming water-saturated in the period between the 24th and the 30th.
- Red: Areas flooded or water-saturated on September 24th, and drained on September 30th (flood recession).
- Green : Sedimentation areas and mud deposits.
PORT DE PAIX
The size of the area shown is 11.3 x 5.3 kilometers.
UTM geographic coordinates (WGS 1984 Zone 18Q) :
- upper left corner : northing = 2208803 / easting = 723957
- bottom right corner : northing = 2203553 / easting = 735207
Interpretation of the RADARSAT-1 colour composition :
- Pink: flooded by mudflows on September 24th; mud sedimentation observed on September 30th.
- Green: areas totally flooded by water on September 24th; water had recessed on September 30th.
- Blue: population moves; new emergency settlements on September 30th.
(in the immediate meighborhood of the urban area; otherwise there may be confusion in mountaneous areas).
- Red: total destruction.
- White: untouched buildings.
Interpretation of the "LANDSAT-7 + change detection" map :
- Violet & pink: Areas flooded or water-saturated during the whole observation period (24-30 September).
- Blue: Areas flooded or becoming water-saturated in the period between the 24th and the 30th.
- Red: Areas flooded or water-saturated on September 24th, and drained on September 30th (flood recession).
- Green : Sedimentation areas and mud deposits.
GROS-MORNE
The size of the area shown is 7.5 x 5.8 kilometers.
UTM geographic coordinates (WGS 1984 Zone 18Q) :
- upper left corner : northing = 2179107 / easting = 739448
- bottom right corner : northing = 2173357 / easting = 746948
Interpretation of the RADARSAT-1 colour composition :
- Pink: flooded by mudflows on September 24th; mud sedimentation observed on September 30th.
- Green: areas totally flooded by water on September 24th; water had recessed on September 30th.
- Blue: population moves; new emergency settlements on September 30th.
- Red: total destruction (the town is devastated).
- White: untouched buildings.
Interpretation of the "LANDSAT-7 + change detection" map :
- Violet & pink: Areas flooded or water-saturated during the whole observation period (24-30 September).
- Blue: Areas flooded or becoming water-saturated in the period between the 24th and the 30th.
- Red: Areas flooded or water-saturated on September 24th, and drained on September 30th (flood recession).
- Green : Sedimentation areas and mud deposits.
ANSE ROUGE
The size of the area shown is 6.4 x 4.0 kilometers.
UTM geographic coordinates (WGS 1984 Zone 18Q) :
- upper left corner : northing = 2173594 / easting = 699161
- bottom right corner : northing = 2169594 / easting = 705536
Interpretation of the RADARSAT-1 colour composition :
- Pink: flooded by mudflows on September 24th; mud sedimentation observed on September 30th.
- Green: areas totally flooded by water on September 24th; water had recessed on September 30th.
- Blue: population moves; new emergency settlements on September 30th.
(in the center of the town, more likely to correspond here to remaining rubble and mud)
- Red: total destruction.
- White: untouched buildings.
Interpretation of the "LANDSAT-7 + change detection" map :
- Violet & pink: Areas flooded or water-saturated during the whole observation period (24-30 September).
- Blue: Areas flooded or becoming water-saturated in the period between the 24th and the 30th.
- Red: Areas flooded or water-saturated on September 24th, and drained on September 30th (flood recession).
- Green : Sedimentation areas and mud deposits.
Produced by PARBLEU TECHNOLOGIES Inc. under mandate of the CANADIAN SPACE AGENCY.
(Standing Offer for Disaster Management Information Products and Services; PWGSC File Number 9F028-014927/008/ST)
Procurement of the original RADARSAT-1 SAR data: Canadian Space Agency, and Radarsat International Inc.
Original RADARSAT-1 images: Copyright Canadian Space Agency / Agence Spatiale Canadienne, 2004.
Copyright (C) PARBLEU Technologies Inc., October 2004
