.par_screen

This function takes input object and type character to ingest
the input object to return the object in the desired class.

internal

Geospatial data computation is parallelized by grid, hierarchy,
or raster files. Based on 'future' (Bengtsson, 2024 <doi:10.32614/CRAN.package.future>)
and 'mirai' (Gao et al., 2025 <doi:10.32614/CRAN.package.mirai>) parallel back-ends,
'terra' (Hijmans et al., 2025 <doi:10.32614/CRAN.package.terra>) and
'sf' (Pebesma et al., 2024 <doi:10.32614/CRAN.package.sf>)
functions as well as convenience functions in the package can be distributed
over multiple threads. The simplest way of parallelizing generic geospatial
computation is to start from par_pad_*() functions to par_grid(),
par_hierarchy(), or par_multirasters() functions. Virtually any functions
accepting classes in 'terra' or 'sf' packages can be used in the three
parallelization functions. A common raster-vector overlay operation
is provided as a function extract_at(), which uses
'exactextractr' (Baston, 2023 <doi:10.32614/CRAN.package.exactextractr>), with
options for kernel weights for summarizing raster values at vector geometries.
Other convenience functions for vector-vector operations including
simple areal interpolation (summarize_aw()) and summation of
exponentially decaying weights (summarize_sedc()) are also provided.

Insang Song

chopin

Spatial Parallel Computing by Hierarchical Data Partitioning

Kyle Messier

Alec L. Robitaille

Eric R. Scott

.par_screen function

<dl><dt>type</dt>
<dd>character(1). "raster" or "vector".</dd>
<dt>input</dt>
<dd>object. Input object.</dd>
<dt>input_id</dt>
<dd>character(1). Default is NULL. If NULL, the function
will not check the object with an ID column.</dd>
<dt>out_class</dt>
<dd>character(1). Default is NULL, but should be one of
<code>c("sf", "terra")</code>. Default is "terra".</dd>
<dt>.window</dt>
<dd>numeric(4)/SpatExtent/st_bbox object. Loading window.</dd></dl>

Arguments

Prescreen input data for parallelization — .par_screen

<dl>

<dt>type</dt>
<dd>character(1). "raster" or "vector".</dd>


<dt>input</dt>
<dd>object. Input object.</dd>


<dt>input_id</dt>
<dd>character(1). Default is NULL. If NULL, the function
will not check the object with an ID column.</dd>


<dt>out_class</dt>
<dd>character(1). Default is NULL, but should be one of
<code>c("sf", "terra")</code>. Default is "terra".</dd>


<dt>.window</dt>
<dd>numeric(4)/SpatExtent/st_bbox object. Loading window.</dd>

</dl>

.par_screen: Prescreen input data for parallelization

Description

Usage

Arguments