Publications by Michael
Outdoors
Porcupine River – public domain by David Spencer, FWS Day 20 of 30DayMapChallenge: « Outdoors » (previously). Get some fresh air in Alaska! Setup library(tidyverse) library(terra) library(viridis) Data You can browse several DEM datasets on https://elevation.alaska.gov/#66.53733:-145.25385:13. Yukon Flats by Lidar look promising… dtm_...
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5-minute map
Clock 10:05 – CC-BY-NC-ND by Bill Dickinson Day 19 of 30DayMapChallenge: « 5-minute map » (previously). Setup library(tidyverse) library(leaflet) library(httr) library(fs) library(glue) Data We reuse the Geonames data from Bad map. gn_file <- "~/data/geonames/allCountries.zip" if (!file_exists(gn_file)) { GET("http://download.geoname...
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Birds in atmosphere
Northern Gannet – Morus bassanus – CC-BY by caroline legg Day 18 of 30DayMapChallenge: « Atmosphere » (previously). Thanks to a post from @[email protected] I found a dataset (Warwick-Evans et al. 2017) that could (vaguely) relates to the theme of atmosphere. It describes the trajectories of GPS tracked Northern Gannets (Morus bassanus L...
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Flow
Flow – CC-BY-NC by Sebastian Bender Day 17 of 30DayMapChallenge: « Flow » (previously). Mapping the commuters to Lyon in France. Data comes from INSEE and is part of the national census. library(tidyverse) library(sf) library(glue) library(janitor) library(patchwork) Paris, Lyon and Marseille are subdivided in this dataset (by arrondissem...
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Tanaka
Mount Fuji sunrise – CC-BY-NC-ND by Gilbert Sopakuwa Day 23 of 30DayMapChallenge: « 3D » (previously). The Tanaka contours (Tanaka 1950) are a method of displaying 3D as a succession of terraces. library(elevatr) library(terra) library(tanaka) ele <- get_elev_raster(data.frame(x = 138.727350, y = 35.36...
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North
Arrows – CC-BY by Dean Hochman Day 22 of 30DayMapChallenge: « North » (previously). Indeed, north is not always up. Actually, north is not even always north… Setup library(tidyverse) library(rnaturalearth) library(sf) library(ggrepel) library(glue) Data Using the movement of magnetic poles From 1590 to 2025. north_pole_file <- "NP.xy"...
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Black & white
Adelie Penguin (Pygoscelis adeliae) – CC-BY-SA by Gregory “Slobirdr” Smith Day 24 of 30DayMapChallenge: « Black & white » (previously). All #RStats enthusiasts seem to love Penguins (at least as a toy dataset), so I made a map. Setup library(tidyverse) library(rnaturalearth) library(sf) library(glue) library(ggtext) Data Data produce...
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Fast remote parquet
Parquet – CC BY-SA by tetue Querying a remote parquet file via HTTP with DuckDB. The french statistical service (INSEE) has made available its first parquet file on data.gouv.fr in June. It’s a 470 MB file (from a 1.8 GB CSV) with 16·106 rows, showing for each address in France which polling station it belongs to. It would take at least 23...
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Mountains
Aconcagua – 6991 m If you like mountains, R and T-shirts, I got you covered. Here we use {elevatr} to get a DEM around some well known summits and make a map consisting only of isohypses. It produces (sometimes) very nice visualizations. And from these designs we can make nice T-shirts. You can buy some on https://shirt.iresmi.net/ and if your f...
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Copernicus OpenEO NDVI time series
The European Union has recently deployed a bunch of tools to access the data produced by the Copernicus Earth observation program: cool browser, APIs, Jupyter notebooks. Jupyter notebooks are great: they allow to analyze satellite images without having to select, download, calibrate, mosaic gigabytes of data on your own computer. But it’s Python!...
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