Author Archives: Markus Konrad

Linkdump #114

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Linkdump #113

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Python
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Linkdump #112

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Linkdump #111

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Zooming in on maps with sf and ggplot2

When working with geo-spatial data in R, I usually use the sf package for manipulating spatial data as Simple Features objects and ggplot2 with geom_sf for visualizing these data. One thing that comes up regularly is “zooming in” on a certain region of interest, i.e. displaying a certain map detail. There are several ways to do so. Three common options are:

  • selecting only certain areas of interest from the spatial dataset (e.g. only certain countries / continent(s) / etc.)
  • cropping the geometries in the spatial dataset using sf_crop()
  • restricting the display window via coord_sf()

I will show the advantages and disadvantages of these options and especially focus on how to zoom in on a certain point of interest at a specific “zoom level”. We will see how to calculate the coordinates of the display window or “bounding box” around this zoom point.

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Linkdump #110

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Linkdump #109

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Linkdump #108

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Linkdump #107

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Linkdump #106

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