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I conducted the following research as a Research Assistant for the Applied Computing Laboratory of the French Institute of Pondicherry (IFP) in India in 2001/03.

Pichavaram mangrove

Mangrove vegetation change using Remote Sensing, India

Conducted a multi-temporal analysis of vegetation using LandsatTM and IRS satellite data.

Data : 2 Landsat TM images acquiered in October1988, and March 1993.
Software : Erdas Imagine, Excel
Skills : Remote sensing interpretation and analysis, Advance classification, mapping.

Output: "Change detection in the vegetation of Godavari mangrove between 1988 and 1993 using NDVI difference approach", by Stéphane Guéritte, technical paper for future reference, Geomatic Lab, Institut Français de Pondichéry, India.

Links /
Ifp website •

This study comes as an add-on to a similar multitemporal study conducted by Benoit de Solan, intern at the FIP in summer 2001, who 3 satellite images : MSS (1977), and Landsat TM (1993 and 1999).
1 extra image was added in that analysis, to close the 15-years gap between 1975-MSS image and 1993-TM image.

Data & Methodology
a- 2 Landsat TM images acquiered in October1988, and March 1993.
b- Relative geometric correction
c- Convert DN to Radiance
d- Relative atmospheric correction of 1993 image based on 1988 image using Ridge Method (Schott et al., 1988 in Song et al. 2000)
e- NDVI image production for 1988, 1993, and "difference NDVI scene " (NDVI variation between 1993 -1988)
f- Advance classification of the « difference NDVI scene » using a water/vegetation/no-vegetation mask made from thresholding 1988 and 1993 NDVI images.

 Gondavari Mangrove viewed by IRS

Gondavari mangrove viewed by IRS:
close look at the shrimp farms
last up-date 4/5/08