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Add an option to drop more points in dense areas than in sparse areas (#35)

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* Add an option to drop the densest features by rate, not a fraction

* Restrict dot dropping just to dots, as it should be

* 50% mix of sparse and uniform point preservation

* Update version, changelog, test, and documentation

* 60% sparse, 40% dense

* Didn't update the test after the last change

* Make the drop-denser rate configurable without recompiling
This commit is contained in:
Erica Fischer
2022-11-16 10:55:07 -08:00
committed by GitHub
parent 622084a507
commit 7733cced43
7 changed files with 1849 additions and 17 deletions
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man/tippecanoe.1
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@@ -567,6 +567,9 @@ If you use \fB\fC\-Bg\fR, it will guess a zoom level that will keep at most 50,0
You can also specify a marker\-width with \fB\fC\-Bg\fR\fIwidth\fP to allow fewer features in the densest tile to
compensate for the larger marker, or \fB\fC\-Bf\fR\fInumber\fP to allow at most \fInumber\fP features in the densest tile.
.IP \(bu 2
\fB\fC\-\-drop\-denser=\fR\fIpercentage\fP: When dropping dots at zoom levels below the base zoom, give the specified \fIpercentage\fP
preference to retaining points in sparse areas and dropping points in dense areas.
.IP \(bu 2
\fB\fC\-\-limit\-base\-zoom\-to\-maximum\-zoom\fR or \fB\fC\-Pb\fR: Limit the guessed base zoom not to exceed the maxzoom, even if this would put more than the requested number of features in a base zoom tile.
.IP \(bu 2
\fB\fC\-al\fR or \fB\fC\-\-drop\-lines\fR: Let "dot" dropping at lower zooms apply to lines too