concentration_per_candidate_cell

Determine the concentrations within the highest focal cells for
the current iteration.

internal

Provides methods for spatial concentration and radius-based risk
calculations. The package focuses on efficient determination of the sum of
observations within a given radius, identifying local concentration
hotspots, and aggregating point data to polygon geometries. These methods
are useful for applications such as insurance, urban analytics,
environmental exposure analysis, and other spatial point pattern workflows.
The underlying maximum covering problem is described by Church (1974)
<doi:10.1007/BF01942293>.

Martin Haringa

spatialrisk

Spatial Concentration and Radius-Based Risk Calculations

concentration_per_candidate_cell function

<dl><dt>candidate_cells</dt>
<dd>data.frame containing cell ids with focal values
selected for refinement in the current iteration.</dd>
<dt>dff</dt>
<dd>data.frame with all observations</dd>
<dt>value</dt>
<dd>column name in `dff` to find concentrations for.</dd>
<dt>size</dt>
<dd>size of cell in meters.</dd>
<dt>points</dt>
<dd>number of points per `size`.</dd>
<dt>cache</dt>
<dd>data.frame containing previously saved highest concentrations.</dd>
<dt>radius</dt>
<dd>radius of circle in meters.</dd>
<dt>crs_metric</dt>
<dd>metric CRS used for candidate cell coordinates.</dd>
<dt>lon</dt>
<dd>longitude column name.</dd>
<dt>lat</dt>
<dd>latitude column name.</dd></dl>

Arguments

Author

Determine the concentrations within the highest focal cells for the current
iteration — concentration_per_candidate_cell

<dl>

<dt>candidate_cells</dt>
<dd>data.frame containing cell ids with focal values
selected for refinement in the current iteration.</dd>


<dt>dff</dt>
<dd>data.frame with all observations</dd>


<dt>value</dt>
<dd>column name in `dff` to find concentrations for.</dd>


<dt>size</dt>
<dd>size of cell in meters.</dd>


<dt>points</dt>
<dd>number of points per `size`.</dd>


<dt>cache</dt>
<dd>data.frame containing previously saved highest concentrations.</dd>


<dt>radius</dt>
<dd>radius of circle in meters.</dd>


<dt>crs_metric</dt>
<dd>metric CRS used for candidate cell coordinates.</dd>


<dt>lon</dt>
<dd>longitude column name.</dd>


<dt>lat</dt>
<dd>latitude column name.</dd>

</dl>

concentration_per_candidate_cell: Determine the concentrations within the highest focal cells for the current iteration

Description

Usage

Arguments

Author