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Which is the return value of the spplot function?
spplot returns a lattice plot of class “trellis”, if you fail to “see” it, explicitly call print (spplot (…)). If identify is TRUE, the plot is plotted and the return value is a vector with row names of the selected points. spplot.locator returns a matrix with identified point locations; use trellis.focus first to focus on a given panel.
How do you plot a choropleth map in R?
If we wanted to plot our map as a ‘true’ choropleth map we need to convert our continouse variable into a categoriacal one, according to whichever brackets we want to use. This requires two steps: Determine the quantile breaks.
Can a leaflet be used with a SP object?
Both tmap and leaflet can also handle both sp and sf objects. As we have already briefly seen, the sf package extends the base plot command, so it can be used on sf objects. If used without any arguments it will plot all the attributes. To plot a single attribute we need to provide an object of class sf, like so:
Can a mapping package take both SP and SF objects?
Mapping packages are in the process of keeping up with the development of the new sf package, so they typicall accept both sp and sf objects. However, there are a few exceptions. Of the packages shown here spplot (), which is part of the good old sp package, only takes sp objects.
How to plot a plot using spplot locator?
If identify is TRUE, the plot is plotted and the return value is a vector with row names of the selected points. spplot.locator returns a matrix with identified point locations; use trellis.focus first to focus on a given panel.
How to plot color with attributes in spplot?
Currently, this only sets the colors to bpy.colors. If the attributes to be plotted are of type factor, spplot tries to create a legend that reflects this. In this case, the color ramp passed needs to be of the same length as the number of factor levels.
How to set a north arrow in spplot?
layout.north.arrow and layout.scale.bar can be used to set a north arrow or scale bar. The sp.layout argument is either a single layout item, or a list with one or more layout items. A layout item is one of a list with one or more Spatial* objects, along with style arguments like col, lty, pch, fill etc.