Interpolates polygon counts to a regular raster grid while preserving
source-zone totals.
Usage
to_raster(source, value_col, resolution, ...)
Arguments
- source
An sf polygon object in a projected CRS.
- value_col
Column containing the values to interpolate. May be
supplied as an unquoted column name or a character string.
- resolution
Raster cell size specified in the linear units of the input projected CRS.
- ...
Additional arguments passed to to_grid().
Value
An sf object containing raster grid-cell polygons and
interpolated values.
Details
Raster grids divide the study area into regular cells of a fixed size. In
pycnogrid, interpolation is performed using a raster grid, but results are
returned as polygon grid cells in an sf object. Smaller cell sizes produce
more output cells and may substantially increase computation time.
Examples
out <- to_raster(
source = nyc_ct_small,
value_col = populationE,
resolution = 500,
max_iter = 5
)
#> Warning: Pycnophylactic smoothing did not converge within `max_iter = 5`. Final relative mean change was 0.0001608.