Oak
Wilt Detection
We are currently evaluating
the use of IKONOS imagery to detect the spread of Oak
Wilt disease in the City of Eagan in Minnesota.
After separating forest
pixels from other land cover classes using an object
classifier, areas of potential disease are identified
using the Normalized Difference Vegetation Index (NDVI).
Field tests verified that oak wilt was correctly identified
in 9 out of 10 sites previously unknown to Eagan Forestry
Division.
Below shows is a map created
by using eCognition software to generate a simple land
cover classification. Forest pixels were then examined
for traces of Oak Wilt using NDVI. Click on each map
to enlarge.
|
