check_existing

This function checks whether the existing sample data meets certain requirements for use in downstream analyses.

internal

Structurally guided sampling (SGS) approaches for airborne laser scanning (ALS; LIDAR). Primary functions provide means
to generate data-driven stratifications & methods for allocating samples. Intermediate functions for calculating and extracting important information
about input covariates and samples are also included. Processing outcomes are intended to help forest and environmental management
practitioners better optimize field sample placement as well as assess and augment existing sample networks in the context of data
distributions and conditions. ALS data is the primary intended use case, however any rasterized remote sensing data can be used,
enabling data-driven stratifications and sampling approaches.

Tristan RH Goodbody

sgsR

Structurally Guided Sampling

Nicholas C Coops

Martin Queinnec

check_existing function

<dl><dt>existing</dt>
<dd>sf 'POINT'. Existing plot network.</dd>
<dt>raster</dt>
<dd>SpatRaster. Raster to guide the location of the samples. If <code>type = "clhs"</code> this raster can also
be used to define the population distributions to be used for sampling.</dd>
<dt>nSamp</dt>
<dd>Numeric. Number of desired samples.</dd>
<dt>details</dt>
<dd>Logical. If <code>FALSE</code> (default) output is sf object of
systematic samples. If <code>TRUE</code> returns a list of sf objects where <code>tessellation</code>
is the tessellation grid for sampling, and <code>samples</code> are the systematic samples.</dd></dl>

Arguments

Check existing sample data against requirements — check_existing

<dl>

<dt>existing</dt>
<dd>sf 'POINT'. Existing plot network.</dd>


<dt>raster</dt>
<dd>SpatRaster. Raster to guide the location of the samples. If <code>type = "clhs"</code> this raster can also
be used to define the population distributions to be used for sampling.</dd>


<dt>nSamp</dt>
<dd>Numeric. Number of desired samples.</dd>


<dt>details</dt>
<dd>Logical. If <code>FALSE</code> (default) output is sf object of
systematic samples. If <code>TRUE</code> returns a list of sf objects where <code>tessellation</code>
is the tessellation grid for sampling, and <code>samples</code> are the systematic samples.</dd>

</dl>

check_existing: Check existing sample data against requirements

Description

Usage

Value

Arguments