Mapshaper.org Website Review

Enter options from the command line interface. Examples: bbox no-quantization precision=0.001 Prevent small polygon features from disappearing at high simplification. Keeps the largest ring of multi-ring features. Interpret x, y values as Cartesian coordinates on a plane, rather than longitude, latitude coordinates on a sphere. Simplified lines remain within a set distance of original lines. Good for thinning dense points, but spikes tend to form at high Lines are simplified by iteratively removing the point that forms the least-area triangle with two adjacent points. Points located at the vertex of more acute angles are preferentially removed, for a smoother appearance. Shapefile, GeoJSON, TopoJSON, DBF and CSV files are supported Files can be loose or in a zip archive Detect line intersections, including self-intersections, to help identify topological errors in a dataset. Fix topology errors by snapping together points with nearly identical coordinates. This option does not apply to TopoJSON files. Enter options from the command line interface. Examples: no-topology encoding=big5