any way we could convert the raster sat image to vector, we are trying to draw all parcels , building and roads on sat image to vector
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Essentially you will need to classify all the objects you want to transform into vectors, this is s typical remote sensing job and is more suitable to do it with the appropriate application.
With FME it wont be an easy task and as suggested you can start by having a look at the RasterToPolygonCoercer.