Study: Using high resolution JERS-1 radar imagery to detect flooding
In moist rainforests, river water levels can rise
around six feet or more in the rainy season. The effect of this is
rivers and creeks extending well beyond their banks. This affects
both the ecology, carbon sequestration budgets and the sustainable
use of rainforests (e.g. road planning). But because of the dense
tree cover, it can be near impossible to map such flooding over extensive
areas using conventional means.
project was undertaken in collaboration with researchers from NASA
to delineate the understorey flooding in 3,700 sq. km of rainforest
in central Guyana using canopy-penetrating satellite radar and a GIS.
The project was a success and a model of international cooperation,
and the technical results are described in a paper that has been peer-reviewed
and accepted for publication by a
remote sensing journal.
Case Study: Using high resolution IKONOS
imagery in a Sea Defences Information System
A project was conducted to rectify high-resolution
IKONOS imagery to sub-metre accuracy for use by the Guyana Sea Defences
4SHORE GIS. Image Ground Control Points were selected and a high-precision
differential GPS ground survey of those points was managed (the survey
was executed by the Guyana Lands & Surveys Commission). Rectification
was done using ERDAS® Imagine.