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Add a new option to set an initial value for an attribute in each feature (#115)

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* Starting on --set-attributes

* Add a JSON form to accumulate-attribute

* Fix formatting

* Set attributes, JSON form

* Also handle setting attributes to unquoted values

* Factoring out character-mangling in the names of tests

* Rename tests for new quoting convention

* Test for JSON form of attribute setting

* Test for JSON form of attribute accumulation

* Forgot to increment the version
This commit is contained in:
Erica Fischer
2023-07-14 10:47:55 -07:00
committed by GitHub
parent 48e769c94c
commit 1c3bd5352c
28 changed files with 1145 additions and 66 deletions
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man/tippecanoe.1
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@@ -503,6 +503,10 @@ If the type is \fB\fCint\fR and the original attribute was floating\-point, it i
that are dropped, coalesced\-as\-needed, or clustered. The \fIoperation\fP may be
\fB\fCsum\fR, \fB\fCproduct\fR, \fB\fCmean\fR, \fB\fCmax\fR, \fB\fCmin\fR, \fB\fCconcat\fR, or \fB\fCcomma\fR
to specify how the named \fIattribute\fP is accumulated onto the attribute of the same name in a feature that does survive.
The attributes and operations may also be specified as JSON keys and values: \fB\fC\-\-accumulate\-attribute='{"attr": "operation", "attr2", "operation2"}'\fR\&.
.IP \(bu 2
\fB\fC\-\-set\-attribute\fR \fIattribute\fP\fB\fC:\fR\fIvalue\fP: Set the value of the specified \fIattribute\fP in each feature to the specified \fIvalue\fP\&. This is mostly useful to give an attribute in each feature an initial value for \fB\fC\-\-accumulate\-attribute\fR\&.
The attributes and values may also be specified as JSON keys and values: \fB\fC\-\-set\-attribute='{"attr": value, "attr2", value}'\fR\&.
.IP \(bu 2
\fB\fC\-pe\fR or \fB\fC\-\-empty\-csv\-columns\-are\-null\fR: Treat empty CSV columns as nulls rather than as empty strings.
.IP \(bu 2
@@ -863,7 +867,7 @@ this minimum size and others will not be drawn at all, preserving the total area
all of them should have had together.
.PP
Features in the same tile that share the same type and attributes are coalesced
together into a single geometry if you use \fB\fC\-\-coalesce\fR\&. You are strongly encouraged to use \-x to exclude
together into a single geometry if you use \fB\fC\-\-coalesce\fR\&. You are strongly encouraged to use \fB\fC\-x\fR to exclude
any unnecessary attributes to reduce wasted file size.
.PP
If a tile is larger than 500K, it will try encoding that tile at progressively