Scales
Scale rulers – © by Frank
Day 12 of 30DayMapChallenge: « scales » (previously).
French « départements » at the same size but tidily ordered by area, using data from Adminexpress made in Simplifying polygons layers.
libra...
Articles by Michael
Sentinel
Day 11 of 30DayMapChallenge : « red » (previously). Today no cartography in R but in QGIS. However the satellite image processing has been made with the {sen2R} package. We emulate infrared photography with a combination of the 8, 4 and 3 bands from the Sentinel-2 satellites, aimed at Termignon in the Vanoise National Park. Glaciers (... [Read more...]
Sentinel
Termignon – CC-BY-NC-ND by Marcel Holyoak
Day 11 of 30DayMapChallenge: « red » (previously).
Today no cartography in R but in QGIS. However the satellite image processing has been made with the {sen2R} package.
We emulate infrared ...
Get lost
Day 10 of 30DayMapChallenge : « bad map » (previously). Just resampling… [Read more...]
Get lost
Day 10 of 30DayMapChallenge: « bad map » (previously).
Just resampling…
library(tidyverse)
library(sf)
library(glue)
library(ggspatial)
library(ggrepel)
library(rnaturalearth)
set.seed(4326)
# final projection
map_proj
Use data from Wikipedia
Day 9 of 30DayMapChallenge : « space » (previously). Scrape and geolocate data from Wikipedia. We will map the active space launch sites. [Read more...]
The giant French Olympic-size swimming pool
Day 7 of 30DayMapChallenge : « Openstreetmap » (previously). What if all private swimming pools could be merged into one 25 m width pool? OSM is not just a map, it’s a database, so ask OSM… I know that not all swimming pools are present in OSM, but it’s just an exercise 🙂 and ...
Use data from Wikipedia
Ariane 5 – CC BY-NC-ND by NASA HQ PHOTO
Day 9 of 30DayMapChallenge: « space » (previously).
Scrape and geolocate data from Wikipedia. We will map the active space launch sites.
library(tidyverse)
library(lubridate)
library(janitor...
The giant French Olympic-size swimming pool
pool swimming – CC BY by VV Nincic
Day 8 of 30DayMapChallenge: « Openstreetmap » (previously).
What if all private swimming pools could be merged into one 25 m width pool? OSM is not just a map, it’s a database, so ask OSM… I ...
Use data from data.gouv.fr
Day 6 of 30DayMapChallenge : « network » (previously). Using GIS data directly from data.gouv.fr : railways network of France. [Read more...]
Use data from data.gouv.fr
TGV – CC BY-NC-ND by Enzo JIANG
Day 6 of 30DayMapChallenge: « network » (previously).
Using GIS data directly from data.gouv.fr : railways network of France.
library(dplyr)
library(ggplot2)
library(sf)
library(glue)
library(httr)
...
Use data from Openstreetmap
Day 5 of 30DayMapChallenge : « Ukraine » (previously). Using {osmdata} to extract streets : [Read more...]
Use data from Openstreetmap
Kyiv, bridges on Dnieper – CC by Nick S
Day 5 of 30DayMapChallenge: « Ukraine » (previously).
Using {osmdata} to extract streets:
library(tidyverse)
library(sf)
library(osmdata)
library(ggspatial)
library(glue)
ua_bbox
Opening a spatial subset with {sf}
Intersecting an area of interest with a layer at opening time Days 3 and 4 of 30DayMapChallenge : « polygons » and « green » (previously). The CORINE Landcover dataset is distributed as a geopackage weighting more than 8 Go. To limit the memory used when we only work on a subset, we can clip it at opening ... [Read more...]
Opening a spatial subset with {sf}
Wine villages – CC BY-NC by Lefteris Katsouromallis
Day 3 and 4 of 30DayMapChallenge: « polygons » and « green » (previously).
Intersecting an area of interest with a layer at opening time
The CORINE Landcover dataset is distributed as a g...
My air travel carbon footprint
I shouldn’t have… [Read more...]
My air travel carbon footprint
Flygskam (in Mercator projection) – r.iresmi.net
Day 2 of 30DayMapChallenge: « Lines » (previously).
I shouldn’t have…
library(tidyverse)
library(sf)
library(glue)
library(rnaturalearth)
library(units)
# grams of carbon dioxide-e...
Extract POIs from a Suunto watch
Vintage Suunto – CC-BY by Mikael Leppä
Day 1 of 30DayMapChallenge: « Points » (previously).
The Suunto watches (Spartan, Suunto 9,…) can record waypoints (or POIs) but although they can be visualized in the Suunto app (or on t...
Extract POIs from a Suunto watch
The Suunto watches (Spartan, Suunto 9,…) can record waypoints (or POIs) but although they can be visualized in the Suunto app (or on the watch), they cannot be exported to be used with other tools. It used to be possible to access them from the Movescount website but it was discontinued ... [Read more...]
Simplifying polygons layers
The current 2021 french administrative limits database (Adminexpress from IGN) is more detailed than the original version (from 50 MB zipped in 2017 to 500 MB zipped now), thanks to a more detailed geometry being currently based on the BDTOPO. However we don’t always need large scale details especially for web applications. The ... [Read more...]
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