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Add -T option to coerce the types of feature attributes

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Eric Fischer
2017-04-17 15:20:03 -07:00
parent 65ee2cf0a5
commit 178b5d0054
9 changed files with 275 additions and 43 deletions
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man/tippecanoe.1
+6
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@@ -144,6 +144,12 @@ resolution is obtained than by using a smaller \fImaxzoom\fP or \fIdetail\fP\&.
\fB\fC\-y\fR \fIname\fP or \fB\fC\-\-include=\fR\fIname\fP: Include the named properties in all features, excluding all those not explicitly named
.IP \(bu 2
\fB\fC\-X\fR or \fB\fC\-\-exclude\-all\fR: Exclude all properties and encode only geometries
.IP \(bu 2
\fB\fC\-T\fR\fIattribute\fP\fB\fC:\fR\fItype\fP or \fB\fC\-\-attribute\-type=\fR\fIattribute\fP\fB\fC:\fR\fItype\fP: Coerce the named feature \fIattribute\fP to be of the specified \fItype\fP\&.
The \fItype\fP may be \fB\fCstring\fR, \fB\fCfloat\fR, \fB\fCint\fR, or \fB\fCbool\fR\&.
If the type is \fB\fCbool\fR, then original attributes of \fB\fC0\fR, \fB\fCfalse\fR, \fB\fCnull\fR, or the empty string become \fB\fCfalse\fR, and otherwise become \fB\fCtrue\fR\&.
If the type is \fB\fCfloat\fR or \fB\fCint\fR and the original attribute was non\-numeric, it becomes \fB\fC0\fR\&.
If the type is \fB\fCint\fR and the original attribute was floating\-point, it is rounded to the nearest integer.
.RE
.SS Dropping a fixed fraction of features by zoom level
.RS