Publications by Michael
Codes postaux
Yellow post box – CC-BY-SA by Elliott Brown Day 30 of 30DayMapChallenge: « The final map » (previously). Creating a raw polygon layer of french postal codes from points This data, although not a “real” administrative limit, is often used in many different applications, see for example the BNV-D. There is no free, up-to-date, layer of p...
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Spilhaus
Monitoring the Single-Celled Powerhouses of the Sea – CC-BY-NC by NASA’s Marshall Space Flight Center Day 26 of 30DayMapChallenge: « Map projections » (previously). After seeing this post by Cédric Vidonne I had to try to use the Spilhaus projection too. Config library(dplyr) library(ggplot2) library(scales) library(glue) library(terra...
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Pesticides
Tractor fertilizes field pesticide and insecticide – CC-BY by Aqua Mechanical Day 24 of 30DayMapChallenge: « Only circular shapes » (previously). We’ll map the pesticides bought in France as a Dorling cartogram (Dorling 1996). Config library(readr) library(dplyr) library(tidyr) library(stringr) library(ggplot2) library(glue) library(jan...
1434 sym R (2320 sym/4 pcs) 4 img
India
Holi 2016-01 – CC-BY-NC-ND by Rajesh Pamnani Day 22 of 30DayMapChallenge: « 2 colours » (previously). Just a joke… Config library(dplyr) library(rnaturalearth) library(ggplot2) library(glue) Data Data from Natural Earth. countries <- ne_countries(scale = 110, returnclass = "sf") Map countries |> ggplot() + geom_sf(aes(fill = i...
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Bike accidents
Ciclista atropellado – CC-BY by Nicanor Arenas Bermejo Day 20 & 21 of 30DayMapChallenge: « OpenStreetMap » and « Conflict » (previously). Mapping the accidents between bicycles and cars in 2023 in France. We have had a few sad accidents recently showing a growing attention on cyclist security and the conflicts on the road. We’ll use t...
929 sym R (2297 sym/4 pcs) 2 img
Greenland ice thickness
Meltwater in crevasses in Greenland – CC-BY-NC by NASA’s Marshall Space Flight Center Day 11 of 30DayMapChallenge: « Arctic » (previously). We’ll use the Greenland 5 km DEM, Ice Thickness, and Bedrock Elevation Grids (J. Bamber 2001) from J. L. Bamber, Layberry, and Gogineni (2001) and Layberry and Bamber (2001). Download here (after r...
1279 sym R (1736 sym/3 pcs) 4 img
Birth date temperature
Valley of the roses – CC-BY-NC-ND by Riccardo Maria Mantero Day 6 of 30DayMapChallenge: « Raster » (previously). What was the temperature at your birth place when you were born? Copernicus provides many climate datasets. We can use ERA5 post-processed daily statistics on single levels from 1940 to present to display the weather on your birt...
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Whales movements
Blue Whale – CC-BY-NC-ND by Tom Benson Day 5 of 30DayMapChallenge: « A Journey » (previously). Thirteen Blue whales (Balaenoptera musculus) were satellite tagged in 2015 in Australia (Mӧller et al. 2020). We’ll follow their summer in the Great Southern Australian Coastal Upwelling System (GSACUS). Data is available from the Australian ...
939 sym R (699 sym/2 pcs) 2 img
Global discret grids
Hexagonos – CC-BY-SA by Fernando Reyes Palencia Day 4 of 30DayMapChallenge: « Hexagons » (previously). Hexagonal grid? We will do statistical binning on a hexagonal grid, but not just any grid. Geodesic Discrete Global Grid Systems (Kimerling et al. 1999; Sahr, White, and Kimerling 2003) allow to use hierarchical equal-area hexagon1 grids. ...
2424 sym R (6122 sym/9 pcs) 8 img
Death penalty
Death Valley Winter – CC-BY by street.light Day 3 of 30DayMapChallenge: « Polygons » (previously). A classic world choropleth map. We’ll use the Comparative Death Penalty Database (Anckar and Denk 2024) available on https://dataverse.harvard.edu/dataset.xhtml?persistentId=doi:10.7910/DVN/LI3WYK and the basemap from {rnaturalearth}. librar...
1078 sym R (2322 sym/4 pcs) 4 img