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Ubuntu 14.04, QGIS 2.8.1 The way I did this with your test file was to convert the DWG file to a DXF using (free) Teigha File Converter. Then I loaded the DXF into QGIS and tried to polygonize it (using 'Polygonize' from the Processing toolkit). In fact 'Polygonize' only partially converted the lines to polygons, there is a problem with the DXF. So, it was ...


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Yes, there are free object-oriented (segmentation) software available. A few that come to mind are Spring, ITK, Orfeo toolbox and GRASS GIS. I would however point out that image segmentation is a poor direction to peruse when trying to model fractional cover. A segmentation algorithm is designed to minimize within unit variance and maximize between unit ...


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I have attended training in use of the Semi-Automatic Classification Plugin for QGIS. From what I could see it could be what you are looking for. The whole rig is available for free, so money should not be an issue. Admittedly I am no expert in these tools, but the author says it includes several classification algorithms (Minimum Distance, Maximum ...


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Maponics would love to supply you with the best neighborhood boundaries available. If nationwide drops of shape files are too large or beyond your budget, you can also use our API that enables you to download just what you need by attribute, geographic window or ID. In addition, we also have "Context" data that is associated with our neighborhoods, carrier ...



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