Chris Jochem

Geographer with a computer. @WorldPopProject, #rstats

[E&P B: Urban Analytics and City Science @envplanb]

🥳The Breheny Prize for the most innovative @envplanb article published in 2021 has been awarded to @ChrisJochem , Douglas Leasure, Oliver Pannell, @HeatherCh100 , Patricia Jones, @AndyTatem from the @WorldPopProject Congratulations to all👏Find out more: https://t.co/eMI5LwF935

[Chris Jochem @ChrisJochem]

This work was supported by @WorldPopProject, @grid3global.

Read more here: https://t.co/VoETGNVZ40

[Chris Jochem @ChrisJochem]

Thank you @evnplanb and congratulations to my co-authors!

[E&P B: Urban Analytics and City Science @envplanb]

🥳The Breheny Prize for the most innovative @envplanb article published in 2021 has been awarded to @ChrisJochem , Douglas Leasure, Oliver Pannell, @HeatherCh100 , Patricia Jones, @AndyTatem from the @WorldPopProject Congratulations to all👏Find out more: https://t.co/eMI5LwF935

[Chris Jochem @ChrisJochem]

Our paper looks at a way to classify and map potential settlement types from the spatial patterns of building footprints using Gaussian mixture models.

[Chris Jochem @ChrisJochem]

@jaredlander @paleolimbot @edzerpebesma @CARTO @TimSalabim3 I wrote sfarrow when I needed it and nothing else was available. It's not meant to be competing. I'm glad there's so much interest and development around this file format now. A GDAL, geoarrow or native arrow solution will ultimately be best.

[Chris Jochem @ChrisJochem]

@rsfrankl @GeogAnalysis Speaking of throwbacks... the current @GeogAnalysis author guidelines still list vellum as an option for illustrations. Do you get many of those submissions??

[Jeremiah J Nieves @Dr_Col_Nieves]

New random forest informed population modelling package in R (https://t.co/eSVwOVEOQh ). Vignette/tutorial can be found (for now) at (https://t.co/sffHlvl2Gu)
@geodatascience @WorldPopProject #Population #rspatial

[Dani Arribas-Bel `@[email protected]` @darribas]

Got excited and took it out for a spin, all looking great! Here's how you can read/write geospatial data between R and Python like it's the XXIst Century (also, in the same notebook thanks to the https://t.co/mf2OucmOI4). Notebook at:
https://t.co/tffEeedBUn

[Chris Jochem @ChrisJochem]

My first #rstats 📦on CRAN! {sfarrow} Reading/writing spatial objects with coordinate reference system info from/to Parquet files and partitioned datasets #rspatial

https://t.co/kMhwxsoBBP

[Chris Jochem @ChrisJochem]

Experimental #rstats 📦 {sfarrow} for reading/writing `sf` objects from/to Parquet files with {arrow}. Using consistent geo metadata to work with @GeoPandas. Currently quite simple; feedback and ideas welcome #rspatial

https://t.co/s64nypZs1M

[Monica Alexander @monjalexander]

Excited that there will be not one but TWO Bayesian demography sessions at #PAA2021 on Wed 5 May!

- 10:45PM CT: @AdrianRaftery1 @DrEmmaZang @mr_wheldon @jonathanbearak discussant @NCahill_Stat

- 2:30PM CT: @caseyfbreen @sinafala @ChrisJochem @jonwakeblue discussant @CSchmert

[Chris Jochem @ChrisJochem]

The package has flexibility to calculate morphology metrics on grids, in polygon zones, and using focal windows. Check out the code/docs here:
https://t.co/GTJI3rB1kk

All the data and settlement classification from our paper are available!
https://t.co/rwVeZSICqr

[Chris Jochem @ChrisJochem]

New paper now out with @AndyTatem @WorldPopProject. We introduce our #rstats 📦foot for calculating gridded morphology measures of building footprints https://t.co/UvxHoE7DUL

[Chris Jochem @ChrisJochem]

The paper also presents an example of generating a gridded classification of settlements for England, Scotland, and Wales using only patterns in buildings and unsupervised clustering

[Chris Jochem @ChrisJochem]

@martinfleis @underdarkGIS @dinomirMT @jlehtoma @tenkahen @UrbanDemog @antagomir @ouzor @geopandas Yes! And this is what I'm doing with my implementation in R to read/write sf files in Arrow. https://t.co/s64nyqh3qm

[WorldPopProject @WorldPopProject]

Developing methods for classifying residential status of urban buildings: https://t.co/TVt0nBdK4h

[Chris Jochem @ChrisJochem]

@coolbutuseless The features have also been pre-processed here: https://t.co/159QDYuA5z by @undertheraedar

[Chris Jochem @ChrisJochem]

Experimental #rstats 📦 {sfarrow} for reading/writing `sf` objects from/to Parquet files with {arrow}. Using consistent geo metadata to work with @GeoPandas. Currently quite simple; feedback and ideas welcome #rspatial

https://t.co/s64nypZs1M

[WorldPopProject @WorldPopProject]

New WorldPop paper in @PNASNews as part of @grid3global - National population mapping from sparse survey data: https://t.co/6rXt8jQL8g - explore outputs at: https://t.co/VUAy4y45zQ

[WorldPopProject @WorldPopProject]

Explore our new Bayesian population estimate datasets produced as part of the @grid3global program through the woprVision app: https://t.co/VUAy4y45zQ

[Heather Chamberlain @HeatherCh100]

New @WorldPopProject paper led by @ChrisJochem - Classifying settlement types from multi-scale spatial patterns of building footprints, with @Need4GIS @AndyTatem Doug Leasure, Pat Jones @geogsouthampton @grid3global #openaccess #geospatial #urbananalytics https://t.co/3aILkRoyUQ