tm_text: Map layer: text

In r-tmap/tmap: Thematic Maps

Map layer: text

Description

Map layer that draws symbols Supported visual variables are: text (the text itself) col (color), size (font size), and fontface (font face).

Usage

opt_tm_text(
  points.only = "ifany",
  shadow = FALSE,
  shadow.offset.x = 0.1,
  shadow.offset.y = 0.1,
  just = "center",
  along.lines = FALSE,
  bg.padding = 0.4,
  clustering = FALSE,
  point.label = FALSE,
  point.label.gap = 0,
  point.label.method = "SANN",
  remove.overlap = FALSE
)

opt_tm_labels(
  points.only = "ifany",
  shadow = FALSE,
  shadow.offset.x = 0.1,
  shadow.offset.y = 0.1,
  just = "center",
  along.lines = TRUE,
  bg.padding = 0.4,
  clustering = TRUE,
  point.label = TRUE,
  point.label.gap = 0.4,
  point.label.method = "SANN",
  remove.overlap = FALSE
)

opt_tm_markers(
  markers.on.top.of.text = FALSE,
  points.only = "ifany",
  shadow = FALSE,
  just = "center",
  along.lines = TRUE,
  bg.padding = 0.4,
  clustering = TRUE,
  point.label = TRUE,
  point.label.gap = 0.4,
  point.label.method = "SANN",
  remove.overlap = FALSE,
  dots.just = NA,
  dots.icon.scale = 3,
  dots.grob.dim = c(width = 48, height = 48, render.width = 256, render.height = 256)
)

tm_text(
  text = tm_const(),
  text.scale = tm_scale(),
  text.legend = tm_legend(),
  text.chart = tm_chart_none(),
  text.free = NA,
  size = tm_const(),
  size.scale = tm_scale(),
  size.legend = tm_legend(),
  size.chart = tm_chart_none(),
  size.free = NA,
  col = tm_const(),
  col.scale = tm_scale(),
  col.legend = tm_legend(),
  col.chart = tm_chart_none(),
  col.free = NA,
  col_alpha = tm_const(),
  col_alpha.scale = tm_scale(),
  col_alpha.legend = tm_legend(),
  col_alpha.chart = tm_chart_none(),
  col_alpha.free = NA,
  fontface = tm_const(),
  fontface.scale = tm_scale(),
  fontface.legend = tm_legend(),
  fontface.chart = tm_chart_none(),
  fontface.free = NA,
  fontfamily = "",
  bgcol = tm_const(),
  bgcol.scale = tm_scale(),
  bgcol.legend = tm_legend(),
  bgcol.chart = tm_chart_none(),
  bgcol.free = NA,
  bgcol_alpha = tm_const(),
  bgcol_alpha.scale = tm_scale(),
  bgcol_alpha.legend = tm_legend(),
  bgcol_alpha.chart = tm_chart_none(),
  bgcol_alpha.free = NA,
  xmod = 0,
  xmod.scale = tm_scale(),
  xmod.legend = tm_legend_hide(),
  xmod.chart = tm_chart_none(),
  xmod.free = NA,
  ymod = 0,
  ymod.scale = tm_scale(),
  ymod.legend = tm_legend_hide(),
  ymod.chart = tm_chart_none(),
  ymod.free = NA,
  angle = 0,
  angle.scale = tm_scale(),
  angle.legend = tm_legend_hide(),
  angle.chart = tm_chart_none(),
  angle.free = NA,
  plot.order = tm_plot_order("size", reverse = FALSE),
  zindex = NA,
  group = NA,
  group.control = "check",
  options = opt_tm_text(),
  ...
)

tm_labels(
  text = tm_const(),
  text.scale = tm_scale(),
  text.legend = tm_legend(),
  text.chart = tm_chart_none(),
  text.free = NA,
  size = tm_const(),
  size.scale = tm_scale(),
  size.legend = tm_legend(),
  size.chart = tm_chart_none(),
  size.free = NA,
  col = tm_const(),
  col.scale = tm_scale(),
  col.legend = tm_legend(),
  col.chart = tm_chart_none(),
  col.free = NA,
  col_alpha = tm_const(),
  col_alpha.scale = tm_scale(),
  col_alpha.legend = tm_legend(),
  col_alpha.chart = tm_chart_none(),
  col_alpha.free = NA,
  fontface = tm_const(),
  fontface.scale = tm_scale(),
  fontface.legend = tm_legend(),
  fontface.chart = tm_chart_none(),
  fontface.free = NA,
  fontfamily = "",
  bgcol = tm_const(),
  bgcol.scale = tm_scale(),
  bgcol.legend = tm_legend(),
  bgcol.chart = tm_chart_none(),
  bgcol.free = NA,
  bgcol_alpha = tm_const(),
  bgcol_alpha.scale = tm_scale(),
  bgcol_alpha.legend = tm_legend(),
  bgcol_alpha.chart = tm_chart_none(),
  bgcol_alpha.free = NA,
  xmod = 0,
  xmod.scale = tm_scale(),
  xmod.legend = tm_legend_hide(),
  xmod.chart = tm_chart_none(),
  xmod.free = NA,
  ymod = 0,
  ymod.scale = tm_scale(),
  ymod.legend = tm_legend_hide(),
  ymod.chart = tm_chart_none(),
  ymod.free = NA,
  angle = 0,
  angle.scale = tm_scale(),
  angle.legend = tm_legend_hide(),
  angle.chart = tm_chart_none(),
  angle.free = NA,
  plot.order = tm_plot_order("AREA", reverse = FALSE, na.order = "bottom"),
  zindex = NA,
  group = NA,
  group.control = "check",
  options = opt_tm_labels(),
  ...
)

tm_markers(
  text = tm_const(),
  text.scale = tm_scale(),
  text.legend = tm_legend(),
  text.chart = tm_chart_none(),
  text.free = NA,
  size = tm_const(),
  size.scale = tm_scale(),
  size.legend = tm_legend(),
  size.chart = tm_chart_none(),
  size.free = NA,
  col = tm_const(),
  col.scale = tm_scale(),
  col.legend = tm_legend(),
  col.chart = tm_chart_none(),
  col.free = NA,
  col_alpha = tm_const(),
  col_alpha.scale = tm_scale(),
  col_alpha.legend = tm_legend(),
  col_alpha.chart = tm_chart_none(),
  col_alpha.free = NA,
  fontface = tm_const(),
  fontface.scale = tm_scale(),
  fontface.legend = tm_legend(),
  fontface.chart = tm_chart_none(),
  fontface.free = NA,
  fontfamily = "",
  bgcol = tm_const(),
  bgcol.scale = tm_scale(),
  bgcol.legend = tm_legend(),
  bgcol.chart = tm_chart_none(),
  bgcol.free = NA,
  bgcol_alpha = tm_const(),
  bgcol_alpha.scale = tm_scale(),
  bgcol_alpha.legend = tm_legend(),
  bgcol_alpha.chart = tm_chart_none(),
  bgcol_alpha.free = NA,
  xmod = 0,
  xmod.scale = tm_scale(),
  xmod.legend = tm_legend_hide(),
  xmod.chart = tm_chart_none(),
  xmod.free = NA,
  ymod = 0,
  ymod.scale = tm_scale(),
  ymod.legend = tm_legend_hide(),
  ymod.chart = tm_chart_none(),
  ymod.free = NA,
  angle = 0,
  angle.scale = tm_scale(),
  angle.legend = tm_legend_hide(),
  angle.chart = tm_chart_none(),
  angle.free = NA,
  plot.order = tm_plot_order("AREA", reverse = FALSE, na.order = "bottom"),
  zindex = NA,
  group = NA,
  group.control = "check",
  options = opt_tm_markers(),
  ...
)

Arguments

points.only	should only point geometries of the shape object (defined in tm_shape()) be plotted? By default "ifany", which means TRUE in case a geometry collection is specified.
shadow	Shadow behind the text. Logical or color.
shadow.offset.x, shadow.offset.y	Shadow offset in line heights
just	justification of the text relative to the point coordinates. Either one of the following values: "left" , "right", "center", "bottom", and "top", or a vector of two values where first value specifies horizontal and the second value vertical justification. Besides the mentioned values, also numeric values between 0 and 1 can be used. 0 means left justification for the first value and bottom justification for the second value. Note that in view mode, only one value is used.
along.lines	logical that determines whether labels are rotated along the spatial lines. Only applicable if a spatial lines shape is used.
bg.padding	The padding of the background in terms of line heights.
clustering	value that determines whether the text labels are clustered in "view" mode. One of: TRUE, FALSE, or the output of markerClusterOptions.
point.label	logical that determines whether the labels are placed automatically.
point.label.gap	numeric that determines the gap between the point and label
point.label.method	the optimization method, either "SANN" for simulated annealing (the default) or "GA" for a genetic algorithm.
remove.overlap	logical that determines whether the overlapping labels are removed
markers.on.top.of.text	should markers be plot on top of the text (by default FALSE)
dots.just	justification of the text relative to the point coordinates. Either one of the following values: "left" , "right", "center", "bottom", and "top", or a vector of two values where first value specifies horizontal and the second value vertical justification. Besides the mentioned values, also numeric values between 0 and 1 can be used. 0 means left justification for the first value and bottom justification for the second value. Note that in view mode, only one value is used.
dots.icon.scale	scaling number that determines how large the icons (or grobs) are in plot mode in comparison to proportional symbols (such as bubbles). In view mode, the size is determined by the icon specification (see tmap_icons) or, if grobs are specified by grob.width and grob.heigth
dots.grob.dim	vector of four values that determine how grob objects (see details) are shown in view mode. The first and second value are the width and height of the displayed icon. The third and fourth value are the width and height of the rendered png image that is used for the icon. Generally, the third and fourth value should be large enough to render a ggplot2 graphic successfully. Only needed for the view mode.
text, text.scale, text.legend, text.chart, text.free	Visual variable that determines the text. See details.
size, size.scale, size.legend, size.chart, size.free	Visual variable that determines the font size. See details.
col, col.scale, col.legend, col.chart, col.free	Visual variable that determines the col color. See details.
col_alpha, col_alpha.scale, col_alpha.legend, col_alpha.chart, col_alpha.free	Visual variable that determines the border color alpha transparency. See Details.
fontface, fontface.scale, fontface.legend, fontface.chart, fontface.free	Visual variable that determines the font face. See Details.
fontfamily	The font family. See gpar() for details.
bgcol, bgcol.scale, bgcol.legend, bgcol.chart, bgcol.free	Visual variable that determines the background color. See Details.
bgcol_alpha, bgcol_alpha.scale, bgcol_alpha.legend, bgcol_alpha.chart, bgcol_alpha.free	Visual variable that determines the background color transparency. See Details.
xmod, xmod.scale, xmod.legend, xmod.chart, xmod.free	Transformation variable that determines the x offset. See details.
ymod, ymod.scale, ymod.legend, ymod.chart, ymod.free	Transformation variable that determines the y offset. See details. the text. See details.
angle, angle.scale, angle.legend, angle.chart, angle.free	Rotation angle
plot.order	Specification in which order the spatial features are drawn. See tm_plot_order() for details.
zindex	Map layers are drawn on top of each other. The zindex numbers (one for each map layer) determines the stacking order. By default the map layers are drawn in the order they are called.
group	Name of the group to which this layer belongs. This is only relevant in view mode, where layer groups can be switched (see group.control)
group.control	In view mode, the group control determines how layer groups can be switched on and off. Options: "radio" for radio buttons (meaning only one group can be shown), "check" for check boxes (so multiple groups can be shown), and "none" for no control (the group cannot be (de)selected).
options	options passed on to the corresponding ⁠opt_<layer_function>⁠ function
...	to catch deprecated arguments from version < 4.0

Details

The visual variable arguments (e.g. col) can be specified with either a data variable name (of the object specified in tm_shape()), or with a visual value (for col, a color is expected). Multiple values can be specified: in that case facets are created. These facets can be combined with other faceting data variables, specified with tm_facets().

The .scale arguments determine the used scale to map the data values to visual variable values. These can be specified with one of the available tm_scale_() functions. The default scale that is used is specified by the tmap option scales.var.

The .legend arguments determine the used legend, specified with tm_legend(). The default legend and its settings are determined by the tmap options legend..

The .free arguments determine whether scales are applied freely across facets, or shared. A logical value is required. They can also be specified with a vector of three logical values; these determine whether scales are applied freely per facet dimension. This is only useful when facets are applied (see tm_facets()). There are maximally three facet dimensions: rows, columns, and pages. This only applies for a facet grid (tm_facets_grid()). For instance, col.free = c(TRUE, FALSE, FALSE) means that for the visual variable col, each row of facets will has its own scale, and therefore its own legend. For facet wraps and stacks (tm_facets_wrap() and tm_facets_stack()) there is only one facet dimension, so the .free argument requires only one logical value.

Examples

tm_shape(World, bbox = World) +
	tm_text("name", size="pop_est", col="continent", 
			col.scale = tm_scale_categorical(values = "seaborn.dark"),
			col.legend = tm_legend_hide(),
			size.scale = tm_scale_continuous(values.scale = 4),
			size.legend = tm_legend_hide())

metro$upside_down = ifelse(sf::st_coordinates(metro)[,2] < 0, 180, 0)
tm_shape(metro) +
	tm_text(text = "name", size = "pop2020",
			angle = "upside_down", size.legend = tm_legend_hide(),
			col = "upside_down",
			col.scale = tm_scale_categorical(values = c("#9900BB", "#228822")),
			col.legend = tm_legend_hide()) +
	tm_title_out("Which Hemisphere?", position = tm_pos_out("center", "top", pos.v = "bottom"))


metroAfrica = sf::st_intersection(metro, World[World$continent == "Africa", ])
Africa = World[World$continent == "Africa", ]

tm_shape(land) +
	tm_raster("cover_cls", 
			  col.scale = tm_scale(
			  	  values = cols4all::c4a("brewer.pastel1")[c(3,7,7,2,6,1,2,2)]
			  ),
			  col.legend = tm_legend_hide()) +
tm_shape(rivers) +
	tm_lines(lwd = "strokelwd", lwd.scale = tm_scale_asis(values.scale = .3),
			 col = cols4all::c4a("brewer.pastel1")[2]) +
    tm_shape(Africa, is.main = TRUE) + 
	tm_borders() +
    tm_shape(metroAfrica) +
	tm_symbols(fill = "red", shape = "pop2020", size = "pop2020", 
			   size.scale = tm_scale_intervals(
			   	    breaks = c(1, 2, 5, 10, 15, 20, 25) * 1e6,
			   	    values.range = c(0.2,2)
			   ),
			   size.legend = tm_legend("Population in 2020"),
			   shape.scale = tm_scale_intervals(
			   	   breaks = c(1, 2, 5, 10, 15, 20, 25) * 1e6,
			   	   values = c(21, 23, 22, 21, 23, 22)
			   ),
			   shape.legend = tm_legend_combine("size")) +
	tm_labels("name")

tm_shape(metroAfrica) +
	tm_markers(text = "name", 
			   dots_fill = "red", 
			   dots_size = 0.3)

tm_shape(metroAfrica) +
	tm_markers(text = "name", 
			   dots_shape = marker_icon(),
			   dots_col = NA,
			   dots_fill = "red", 
			   dots_size = 2,
			   ymod = -0.25,
			   options = opt_tm_markers(point.label = FALSE, remove.overlap = TRUE))

r-tmap/tmap documentation built on June 23, 2024, 9:58 a.m.