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Is there a QGIS plugin which does raster scanning, like ArcScan.

Typical QGIS Vectorization returns very bad outputs that have thousands of 'islands'.

I require a clean and efficient vectorization process.

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    Could you share (click 'edit') an example of the rasters you've worked with, and the output you get in QGIS? – Simbamangu Oct 2 '15 at 17:48
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    Isn't 1 bit (0 or 1) enough? Use gdal_translate with GeoTIFF outputformat, datatype "byte", and creation option -co NBITS=1. – user30184 Oct 3 '15 at 11:10
  • I am trying to vectorize climatic zones of India and geological maps of GSI. @Simbamangu – Manoj_K_Dabi Oct 7 '15 at 9:10

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