Olivier Leroy - Posts

Little Schemer

Scheme

LISP

Functional programming

I have been reading and enjoying The Little Schemer! It’s time to write a bit about it and structure what I learned so far (up to chapter 5).

Function factories to improve Database read and write

R

PG

Functional programming

Like a lot of organizations, my team uses databases (DB) to organize and centralize data. To simplify the team’s life and make our code less redundant, we use functions, in…

From elephant to duck!

DuckDB

R

SQL

PG

With John Hall we wrote a blog post about moving a table from postgres to a parquet file using duckdb.

Awesome jq and GeoJSON

geojson

jq

CLI

GIS

I wrote a blog post about using jq for filtering geojson.

Mapscaping: geospatial consulting – as a business and a career

podcast

GIS

The Mapscaping Podcast is a great podcast in the “geospatial” space. It covers a broad diversity of topics and the production value is always top notch.

R is (also) a graph calculator

R

plot

ggplot2

I am doing some basic maths. I was to frustrate of Roger Bivand explaining stuff that I could not understand with my maths background (science background but loooong time…

Using Go Map to contribute to OSM

OSM

I was a bit intimidated to contribute to OSM and it took me time to do it. I needed to move to another country, get a correct smartphone (I was for a long time a Nokia 3310…

Learning Data Science Meme

learning

meme

I know that I should not bother too much about some meme and just enjoy them like some cheap beer (yes, I enjoy cheap beer) but I would like to react to this one:

Toying with DE-9IM

R

sf

exploring st_relate

The Wonderfull World of Overpass Turbo

OSM

Some tips for Overpass Turbo

Sampling Along a Line

Sampling

Spatstat

first part : Spatstat

Sensor Observation Service: an Introduction

Sensor

Smart environment

Time series

Thanks to SIST and the financial support of my lab, I was able to attend a training course on Sensor Observation Services (SOS) with one of my coworkers. It’s time to…

Trees in Open Data Databases in France

urban forest

survey

tree

I collect tree data sets and here are some links to open data from France. I will update the list when I find more!