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I'm looking for tool that will be convert WMS to vector layer.

Are they ready tool?(for example in python)

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The WMS service usually gives outputs as an Image, and hence it is not possible to get the output as a Shapefile. If your server also has a WFS output, then we can get the vectors out. – Devdatta Tengshe Oct 18 '12 at 16:54
up vote 3 down vote accepted

It sounds like you are wanting to perform Raster To Vector Conversion and some software options for that are compared in Wikipedia. The preceding step will be to copy the WMS into a raster data format (crudest would be a screenshot) and the subsequent step will be to create a map layer from the output vector data format (shapefile in your case).

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