tmap-element {tmap}

tmap element

Description

Building block for drawing thematic maps. All element functions have the prefix tm_.

Details

The fundamental, and hence required element is tm_shape, which specifies the shape object, and also specifies the projection and bounding box.

The elements that serve as aesthetics layers are

Base layers:

tm_polygons	Create a polygon layer (with borders)
tm_symbols	Create a layer of symbols
tm_lines	Create a layer of lines
tm_raster	Create a raster layer
tm_text	Create a layer of text labels
tm_basemap	Create a layer of basemap tiles
tm_tiles	Create a layer of overlay tiles

Derived layers:

tm_fill	Create a polygon layer (without borders)
tm_borders	Create polygon borders
tm_bubbles	Create a layer of bubbles
tm_squares	Create a layer of squares
tm_dots	Create a layer of dots
tm_markers	Create a layer of markers
tm_iso	Create a layer of iso/contour lines
tm_rgb	Create a raster layer of an image

The layers can be stacked by simply adding them with the + symbol. The combination of the elements described above form one group. Multiple groups can be stacked. Each group should start with tm_shape.

Attributes layers:

tm_grid	Create grid lines
tm_scale_bar	Create a scale bar
tm_compass	Create a map compass
tm_credits	Create a text for credits
tm_logo	Create a logo
tm_xlab and tm_ylab	Create axis labels
tm_minimap	Create a minimap (view mode only)

Layout element:

tm_layout	Adjust the layout (main function)
tm_legend	Adjust the legend
tm_view	Configure the interactive view mode
tm_style	Apply a predefined style
tm_format	Apply a predefined format
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References

Tennekes, M., 2018, tmap: Thematic Maps in R, Journal of Statistical Software, 84(6), 1-39, doi:10.18637/jss.v084.i06

See Also

vignette("tmap-getstarted")

The examples in each of the element functions