tmap_CreateLayer: Create a 'tmap'-style map layer from a 'sf' dataframe...
In wStockhausen/wtsROMS: Functions to deal with ROMS model grids and netcdf output

tmap_CreateLayer

R Documentation

Create a tmap-style map layer from a `sf` dataframe representing a model output

Description

Function to create a tmap-style map layer from an sf dataframe representing a model output.

Usage

tmap_CreateLayer(
  sf_dfr,
  col = 4,
  n = 10,
  style = ifelse(is.null(breaks), "pretty", "fixed"),
  breaks = NULL,
  palette = c("blue", "red")
)

Arguments

`sf_dfr`	- `sf` dataset
`col`	- name or index of values column to plot
`n`	- preferred number of classes.
`style`	- method to process the color scale. Discrete options are "fixed", "sd", "equal", "pretty", "quantile", "kmeans", "hclust", "bclust", "fisher", "jenks", and "log10_pretty". For discrete options (except "log10_pretty"), see the details in tmap::classIntervals. Continuous options are "cont", "order", and "log10". The first maps the values of col to a smooth gradient, the second maps the order of values of col to a smooth gradient, and the third uses a logarithmic transformation.
`breaks`	- in case style=="fixed", breaks should be specified. The breaks argument can also be used when style="cont". In that case, the breaks are mapped evenly to the sequential or diverging color palette.
`palette`	- a palette name or a vector of colors. See tmaptools::palette_explorer() for the named palettes. Use a "-" as prefix to reverse the palette. The default palette is taken from tm_layout's argument aes.palette.

Details

Creates a tmap-style shape/fill combination map layer with polygons colored using the palette to represent values of the ROMS variable in sf_dfr. If not provided, the palette will default to the palette associated with the basemap used to plot the layer.