graticule

Specify the creation of lines along meridians by specifying their placement
at particular <code>lons</code> (longitudes) and <code>lats</code> (latitudes) and their extents
with <code>xlim</code> (extent of parallel line in longitude) and <code>ylim</code> (extent of meridional line in latitude).

Create graticule lines and labels for maps. Control the creation
of lines or tiles by setting their placement (at particular meridians and parallels)
and extent (along parallels and meridians). Labels are created independently of
lines.

Michael D. Sumner

Meridional and Parallel Lines for Maps

graticule function

<dl><dt>lons</dt>
<dd>longitudes for meridional lines</dd>
<dt>lats</dt>
<dd>latitudes for parallel lines</dd>
<dt>nverts</dt>
<dd>number of discrete vertices for each segment</dd>
<dt>xlim</dt>
<dd>maximum range of parallel lines</dd>
<dt>ylim</dt>
<dd>maximum range of meridional lines</dd>
<dt>proj</dt>
<dd>optional proj.4 string for output object</dd>
<dt>tiles</dt>
<dd>if <code>TRUE</code> return polygons as output</dd></dl>

Arguments

Create graticule lines. — graticule

<dl>

<dt>lons</dt>
<dd>longitudes for meridional lines</dd>


<dt>lats</dt>
<dd>latitudes for parallel lines</dd>


<dt>nverts</dt>
<dd>number of discrete vertices for each segment</dd>


<dt>xlim</dt>
<dd>maximum range of parallel lines</dd>


<dt>ylim</dt>
<dd>maximum range of meridional lines</dd>


<dt>proj</dt>
<dd>optional proj.4 string for output object</dd>


<dt>tiles</dt>
<dd>if <code>TRUE</code> return polygons as output</dd>

</dl>

graticule: Create graticule lines.

Description

Usage

Value

Arguments

Details

Examples