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Polygon Simplification in GIS. Avoid Gaps and Slivers, Reduced File Size, Consistent Appearance, Attributes Preservation

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in this video I would like to share how to simplify polygons data for non-topological format such as ESRI Shapefile, KML or JSON/GEOJSON. Perform polygon data manipulation such as simplify in non-topological gis data format if not done correctly will lead to causing slivers and gaps in the polygon border. Simplifying methods being used is also has a role in this problem.  The safest approach to do polygons simplify usually by converting the data to polylines first, then after simplifying, the data converted back to polygon. This approach will be tedious for large dataset, and prone to attributes table records matching loss.  This video is about how to avoids those kinds of problems.