rstyle
I am generating some maps and animations with tmap, using tm_facets.
The default style shows rather ugly grey headers for each small map. How can I change the style of the header (position, font size/family, background colour)?
tm_shape(Europe) +
tm_polygons("well_being", title="Well-Being Index") +
tm_facets("part", free.coords=FALSE) +
tm_style_grey()
Similar code snippets are available in the R Vignette.
While the original poster did not specify exactly which the blank spaces were problematic, the plotting area for each map has a lot of space on the right and left (east-west) that is unused. The main issue there is that tmap is using up all the space in each map in the plotting area (often defined by the size of the window available for plotting, this can be manually adjusted prior to running the plot command) provided in its default settings.
To set the bounds of the plotting area, adjust the aspect ratio, i.e. the width and height desired. Here, if we specify an asp=4, we get a plot that roughly corresponds to the map area. A value of asp=8 gives us something similar to the default plot. The result has a lot of blank space on either side of the maps/plot: either crop the exported image or set the exact size in a tmap_save.
Aspect ratio. The aspect ratio of the map (width/height). If NA, it is determined by the bounding box (see argument bbox of tm_shape), the outer.margins, and the inner.margins. If 0, then the aspect ratio is adjusted to the aspect ratio of the device.
metro_long %>%
mutate(population = log(population)) %>%
filter(year %in% c("pop2010", "pop2020", "pop2030")) %>%
tm_shape()+
tm_dots("population", size = 0.2, legend.is.portrait = FALSE) +
tm_facets("year") +
tm_layout(legend.outside.position = "bottom",
asp=4)
See the documentation https://openlayers.org/en/latest/apidoc/module-ol_layer_Vector-VectorLayer.html "Declutter images and text". CircleStyle is an image:
function pointStyleFunction(feature, resolution) {
return new Style({
image: new CircleStyle({
radius: 10,
fill: new Fill({ color: "rgba(255, 0, 0, 0.1)" }),
stroke: new Stroke({ color: "red", width: 1 })
}),
text: createTextStyle(feature, resolution, myDom.points)
});
}
To avoid decluttering you could style the points as Circle geometry:
function pointStyleFunction(feature, resolution) {
return new Style({
geometry: new Circle(feature.getGeometry().getCoordinates(), 10 * resolution),
fill: new Fill({ color: "rgba(255, 0, 0, 0.1)" }),
stroke: new Stroke({ color: "red", width: 1 }),
text: createTextStyle(feature, resolution, myDom.points)
});
}
Best Answer
Use
tm_layout(panel.label.X)to change options: