1TOPOSIMPLIFY(1)                  User Commands                 TOPOSIMPLIFY(1)
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NAME

6       toposimplify - simplifies and filters TopoJSON
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SYNOPSIS

9       toposimplify [options] [file]
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DESCRIPTION

12       Given  an input topology, assigns a z-value to every arc coordinate ac‐
13       cording to a configurable weight function, and then generates an output
14       topology  where every arc coordinate whose z-value is lower than a con‐
15       figurable minimum weight is removed.  Only the x and  y  dimensions  of
16       the coordinates are preserved in the returned topology.
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OPTIONS

19       -h, --help
20              Output usage information.
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22       -V, --version
23              Output the version number.
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25       -o, --out file
26              Specify  the  output TopoJSON file name.  Defaults to - for std‐
27              out.
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29       -p, --planar-area value
30              Specify simplification threshold value  as  the  minimum  planar
31              triangle area, typically in square pixels.
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33       -P, --planar-quantile value
34              Specify  simplification  threshold value as the minimum quantile
35              of planar triangle areas.  The value  should  be  in  the  range
36              [0, 1].
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38       -s, --spherical-area value
39              Specify  simplification threshold value as the minimum spherical
40              triangle            area            (spherical            excess
41              ⟨https://mathworld.wolfram.com/SphericalExcess.html⟩),        in
42              steradians ⟨https://en.wikipedia.org/wiki/Steradian⟩.
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44       -S, --spherical-quantile value
45              Specify simplification threshold value as the  minimum  quantile
46              of     spherical     triangle     area     (spherical     excess
47              ⟨https://mathworld.wolfram.com/SphericalExcess.html⟩.  The value
48              should be in the range [0, 1].
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50       -f, --filter-detached
51              Remove  detached  rings that are smaller than the simplification
52              threshold after simplifying.
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54       -F, --filter-all
55              Remove any  rings  that  are  smaller  than  the  simplification
56              threshold after simplifying.
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SEE ALSO

59       geo2topo(1), topo2geo(1), topomerge(1), topoquantize(1)
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63                                 January 2021                  TOPOSIMPLIFY(1)
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