1.6.9

Add topojson-svg command-line tool for converting TopoJSON to SVG.

1.6.8

• Optimize topojson.presimplify.

1.6.7

• Prune unused arcs after merging.

1.6.6

• If no input files are specified to topojson, it will now try to read JSON input from stdin.
• If no input files are specified to topojson-group, it will now try to read input from stdin.
• If no input files are specified to topojson-merge, it will now try to read input from stdin.
• If no input files are specified to topojson-geojson, it will now try to read input from stdin.
• The topojson-geojson command now allows only a single file as input.

1.6.5

• topojson-merge and topojson-group now propagate properties across merged and grouped objects.

1.6.4

• The geojson command-line tool is now available as topojson-geojson.

1.6.2

• The new topojson-group command-line tool can be used to group polygon features into multipolygon features when they share the same id.

1.6.1

• Various optimizations to improve performance and reduce memory usage while constructing topologies.

1.6.0

• When stitching antimeridian cuts, merge polygons split by the antimeridian (such as eastern Russia).
• Add topojson.merge for merging polygons whilst removing interior borders.
• Add topojson.meshArcs and topojson.mergeArcs.
• Fix topojson.mesh to preserve the directionality of meshed lines.
• Separate pre-quantization from post-quantization as follows:
• Pre-quantization occurs before the topology is constructed, and is controlled by --pre-quantization or --q0. Pre-quantization may produce simpler topologies from messy inputs, but should be disabled to preserve the input topology exactly.
• Post-quantization occurs after the topology is created which, and is solely for producing smaller files (e.g., for web delivery). Post-quantization is controlled by --post-quantization or --q1.
• Fix logging of quantization error when using Cartesian coordinates.
• Fix topology errors introduced by pruning; pruning no longer removes zero-length arcs.
• Remove coincident points after simplifying.

1.5.4

• Fix rounding inaccuracies in viewport scaling of quantized topologies with using --width or --height.