4/10/2023 0 Comments How to convert a file to vectorPreparing the output involves smoothing the polygons generated by Potrace so we end up with nice blocky shapes instead of crazy 1000-sided chiliagons. Preparing the raster therefore involves classifying color ranges so the number of colors is reduced - extracting the dark shade representing buildings and leaving everything else as the background. In the image, buildings are shown in a darker shade. In the below example, the user has an RGB image of an area and needs to extract CAD polygons of buildings. Converting raster to vector in this context involves three steps: In FME, you can leverage it via the custom transformer PotraceCaller. Potrace is a free tool for turning bitmaps into vector graphics. Trace an image to convert it to CAD or GIS Here are three ways you can do it by processing your raster in an FME data integration workflow. There are many possible ways to tackle these problems, some easier than others, some more accurate. Maybe you’d like to digitize a scanned map, convert a DEM to polygons based on elevation, extract text from an image, or otherwise generate polygons from a supplied image. This is a common scenario for GIS and CAD workflows, and a challenging one. Extracting vector features from an image (or “vectorizing a raster”) involves converting groups of raster pixels into polygons.
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