wk_format

wkt_format_handler

Provides an abbreviated version of the well-known text
representation of a geometry. This returns a constant
number of coordinates for each geometry, so is safe to
use for geometry vectors with many (potentially large)
features. Parse errors are passed on to the format string
and do not cause this handler to error.

Provides a minimal R and C++ API for parsing
well-known binary and well-known text representation of
geometries to and from R-native formats.
Well-known binary is compact
and fast to parse; well-known text is human-readable
and is useful for writing tests. These formats are
useful in R only if the information they contain can be
accessed in R, for which high-performance functions
are provided here.

Dewey Dunnington

Lightweight Well-Known Geometry Parsing

Edzer Pebesma

Anthony North

wk_format function

<dl><dt>handleable</dt>
<dd>A geometry vector (e.g., <code>wkb()</code>, <code>wkt()</code>, <code>xy()</code>,
<code>rct()</code>, or <code><a href="https://r-spatial.github.io/sf/reference/sfc.html">sf::st_sfc()</a></code>) for which <code>wk_handle()</code> is defined.</dd>
<dt>precision</dt>
<dd>If <code>trim</code> is <code>TRUE</code>, the total number of significant digits to keep
for each result or the number of digits after the decimal place otherwise.</dd>
<dt>trim</dt>
<dd>Use <code>FALSE</code> to keep trailing zeroes after the decimal place.</dd>
<dt>max_coords</dt>
<dd>The maximum number of coordinates to include
in the output.</dd>
<dt>...</dt>
<dd>Passed to the <code>wk_handle()</code> method.</dd></dl>

Arguments

Format well-known geometry for printing — wk_format

<dl>

<dt>handleable</dt>
<dd>A geometry vector (e.g., <code>wkb()</code>, <code>wkt()</code>, <code>xy()</code>,
<code>rct()</code>, or <code><a href='https://r-spatial.github.io/sf/reference/sfc.html'>sf::st_sfc()</a></code>) for which <code>wk_handle()</code> is defined.</dd>


<dt>precision</dt>
<dd>If <code>trim</code> is <code>TRUE</code>, the total number of significant digits to keep
for each result or the number of digits after the decimal place otherwise.</dd>


<dt>trim</dt>
<dd>Use <code>FALSE</code> to keep trailing zeroes after the decimal place.</dd>


<dt>max_coords</dt>
<dd>The maximum number of coordinates to include
in the output.</dd>


<dt>...</dt>
<dd>Passed to the <code>wk_handle()</code> method.</dd>

</dl>

wk_format: Format well-known geometry for printing

Description

Usage

Value

Arguments

Examples