spex-package

<p>Tools for spatial extents that are agnostic regarding format (i.e. <code>sp</code>,
<code>sf</code>, or <code>raster</code>). These functions fill some of the gaps within and between
these packages for dealing with object extents in flexible ways. Generally,
spex considers extents of raster cells, and extents of objects as first-class
objects (with projection metadata). and provides helpers for  latitudinal
boundaries within projected data.</p>

Functions to produce a fully fledged 'geo-spatial' object extent as a
'SpatialPolygonsDataFrame'. Also included are functions to generate polygons
from raster data using 'quadmesh' techniques, a round number buffered extent, and
general spatial-extent and 'raster-like' extent helpers missing from the originating
packages. Some latitude-based tools for polar maps are included.

Michael D. Sumner

spex

Spatial Extent Tools

spex-package function

<p></p><p><table><tr><td>
<code><a rd-options="" href="/link/buffer_extent?package=spex&version=0.7.1" data-mini-rdoc="spex::buffer_extent">buffer_extent</a></code> </td>
<td> Buffer an extent to a given whole number. </td>
</tr><tr><td>
<code><a rd-options="" href="/link/latitudecircle?package=spex&version=0.7.1" data-mini-rdoc="spex::latitudecircle">latitudecircle</a></code> </td>
<td> Create a latitude circle in a chosen projection. </td>
</tr><tr><td>
<code><a rd-options="" href="/link/latmask?package=spex&version=0.7.1" data-mini-rdoc="spex::latmask">latmask</a></code> </td>
<td> Mask a raster based on a minimum (or maximum) latitude. </td>
</tr><tr><td>
<code><a rd-options="" href="/link/polygonize?package=spex&version=0.7.1" data-mini-rdoc="spex::polygonize">polygonize</a></code> </td>
<td> Convert raster cells to polygons. </td>
</tr><tr><td>
<code><a rd-options="" href="/link/qm_rasterToPolygons?package=spex&version=0.7.1" data-mini-rdoc="spex::qm_rasterToPolygons">qm_rasterToPolygons</a></code> </td>
<td> The <code>sf</code> version of <code>polygonize</code>.  </td>
</tr><tr><td>
<code><a rd-options="" href="/link/qm_rasterToPolygons_sp?package=spex&version=0.7.1" data-mini-rdoc="spex::qm_rasterToPolygons_sp">qm_rasterToPolygons_sp</a></code> </td>
<td> The <code>sp</code> version of <code>polygonize</code>. </td>
</tr><tr><td>
<code><a rd-options="" href="/link/spex?package=spex&version=0.7.1" data-mini-rdoc="spex::spex">spex</a></code> </td>
<td> A function to produce a fully fledged Spatial object extent. </td>
</tr><tr><td>
<code><a rd-options="" href="/link/xlim?package=spex&version=0.7.1" data-mini-rdoc="spex::xlim">xlim</a>, <a rd-options="" href="/link/ylim?package=spex&version=0.7.1" data-mini-rdoc="spex::ylim">ylim</a></code> </td>
<td> Helper functions for extents. </td>
</tr></table></p>

`buffer_extent`	Buffer an extent to a given whole number.
`latitudecircle`	Create a latitude circle in a chosen projection.
`latmask`	Mask a raster based on a minimum (or maximum) latitude.
`polygonize`	Convert raster cells to polygons.
`qm_rasterToPolygons`	The `sf` version of `polygonize`.
`qm_rasterToPolygons_sp`	The `sp` version of `polygonize`.
`spex`	A function to produce a fully fledged Spatial object extent.
`xlim, ylim`	Helper functions for extents.

spex-package: spex

Description

Arguments

Spatial Extent