Geoscience Reference
In-Depth Information
This short case study has demonstrated how vector data can be created using freely
available very high resolution satellite imagery Web services from Google Earth.
Creating vector training datasets is often required for supervised image classification
and it is therefore useful to explain how existing Web services can be harnessed
for this purpose. The approach outlined above could also be adapted to generate a
validation dataset to perform an accuracy assessment of a classified image. The case
study has also demonstrated how GDAL/OGR can be used to extract, transform and
edit the data as part of a post-processing step.
 
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