Quebec floodable areas could use an update...

April 30, 2019 in R, flood, opendata

UPDATE 2020: addr.country, n’existe plus dans les buildings de osm data. aussi il faut faire st_collection_extract(type=“POLYGON”) car mes intersections ont commencé à retourner des geometry collection This morning I heard an annoucement from the provincial government telling me that preparing for floods is my responsibility, that I should check if my house is in a floodable area and that I should visit quebec.ca/inondations for more information.

We currently have multiple major flooding events in the city of Gatineau. I used open data about buildings (package osmdata), floodable area and flooded areas to figure out what percentage of flooded homes actually are in a floodable area. Turns out that more than half of the flooded homes were outside the floodable areas and had no reason to prepare.

This is a dangerous situation and definitely needs fixing.

As usual, the code is available on github. Code snippets I will be coming back to involve the chain were I dropped the worst polygons using st_is_valid(reason=TRUE), fixed the fixable polygons using st_make_valid(), then casted the result usint st_cast(“MULTIPOLYGON”) to make everything digestable by leaflet. Another useful snippet is names(st_geometry(all_builds )) = NULL , because the data generated by osmdata_sf has named geometry, which leaflet doesnt like.

Simon Coulombe

gosseux de données | pelleteux de cloud

data scientist in the insurance industry

Québec, Canada

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Carte des résultats des élections municipales de Montréal 2021

Nov 11, 2021

Merci d’accepter mon choix éditorial de couleurs. {"x":{"url":"/post/2021-11-26-mtl2021/index.en-us_files/figure-html//widgets/widget_unnamed-chunk-1.html","options":{"xdomain":"*","allowfullscreen":false,"lazyload":false}},"evals":[],"jsHooks":[]}

Quels sont les monuments les plus courants?

Oct 10, 2021

Petit projet vite-fait bien-fait qui utilise les données de openstreetmaps pour cartographier les monuments, mémoriaux et autres “artwork” de la province de Québec. Ensuite, je regarde quels sont les top 10 mots les plus courants parce que c’est possible. 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cangetpop: Un package R pour obtenir la population dans n'importe quelle zone

Aug 8, 2021

I created a very tiny R package based off Jens (@vb_jens) ’s excellent {cancensus} and {tongfen} packages. The goal of cangetpop is to return the canadian population within a polygon. There are helper functions to generate a circle of any given radius (in kilometers) around a given longitude. Installation You can install cangetpop from github using devtools::install_github("simoncoulombe/cangetpop") IMPORTANT: make sure to get the development version of tongfen (0.

survie des autos

Jul 7, 2021

Quick blog post basé sur les données des véhicules en circulation de la SAAQ 2013-2019 (https://www.donneesquebec.ca/recherche/dataset/vehicules-en-circulation). Le but c’est de voir quelle marque a le plus de véhicules sur la route après quelques années. Sans surprise les toyota et honda de ce monde dominent largement. Deux curiosités: les F150 disparaissent (exportés?) ainsi que les volkswagen (dieselgate?) Reasons I’ll come back to this post: {showtext} and font_add_google. Mise en page du dernier graphique (palette, polices) inspirée de https://github.

ashton

Jul 7, 2021

(code volé à un dude qui a fait la même chose pour les costco à Anchorage, Alaska) Petit projet avec utilisation de: - osmdata pour trouver les ashton - (new to me) de mapboxapi pour les isochrones - et raster/fasterize pour combiner les multiples isochrones suppressMessages( suppressWarnings({ library(mapboxapi) library(tidyverse) library(mapdeck) library(osmdata) library(leaflet) library(sf) library(raster) library(rgeos) library(fasterize) library(rgdal) library(sf) library(dplyr) library(purrr) library(mapview) }) ) step 1 : trouver les ashton avec osmdata

Labour force participation rates recovery

Jul 7, 2021

Petit post rapide qui utilise les données de Statistique Canada pour regarder l’évolution du taux de participation pendant et après la pandémie.

Où sont les maisons abordables?

Jun 6, 2021

Here I combine two data sources to find the cities with the most affordable houses. We use the median house price fro m2018 as provided by “JLR solutions immobilières” and the median total household income for families with 2 adults for 2018 provided by Statistics Canada. ## # A tibble: 168 x 7 ## geo geo_uid value RMRNOM RMRPIDU PRIDU PRNOM ## <chr> <chr> <dbl> <chr> <chr> <chr> <chr> ## 1 St.

De la préservation du jambon (twitter edition)

Apr 4, 2021

edit août 2021: Ça a pris une semaine et @jefffillion a changé de nom pour transférer ses abonnés sur un compte de fausse “mère de famille” et il a créé un nouveau compte “jefffillion”, mais celui-là est malheureusement sur invitation. J’ai recyclé le bot vers eric duhaime, mais une erreur de manipulation m’a fait perdre le priviliège de tweeter avec un robot. Le robot est donc maintenant désactivé.

De la préservation du jambon (postcast CHOI)

Apr 4, 2021

Edit Août 2021: l’accès vers certain MP3 a été retiré rétroactivement, mais si vous avez besoin de quelque chose je l’ai. Je ne sais pas ce qui arrive au site de CHOI, mais les liens vers les podcast disparaissent parfois, même si les mp3 demeurent disponibles. Pour sauver du feu cette bibliothèque du savoir, je maintiens une liste des liens vers les mp3 pour écouter les entrevues. C’est là : https://docs.

Trouver la meilleure borne de recharge rapide

Nov 11, 2020

unfinished post, please move on