donnees-synth-geo

Get started on SSPCloud

• Using VSCode and Python

Install the project

pip install -e .

To load the input data

Using bash

python scripts/download_FILO.py
python scripts/download_BAN.py

Using Python

from popdbgen import load_FILO, load_BAN
filo_974 = load_FILO("974")
ban_974 = load_BAN("974")

To generate the household and population databases

Using bash

python scripts/generate_database.py --territory 974
python scripts/generate_database.py --territory france --batchsize 100_000

See python scripts/generate_database.py --help for more options.

Using Python

from popdbgen import get_households_population_gdf
households, population = get_households_population_gdf(filo_df=filo, ban_df=ban)

Tiling

The generated households database can be converted to a tiled format for data exploration.

geopackage files can be processed into the mbtiles tiled format using tippecanoe:

France

ogr2ogr -f GeoJSONSeq /vsistdout/ households_france.gpkg | tippecanoe -z15 --drop-densest-as-needed -P -o households_france.mbtiles -l households
ogr2ogr -f GeoJSONSeq /vsistdout/ carreaux_200m_met.gpkg | tippecanoe -z15 --drop-densest-as-needed -P -o carreaux_200m_met.mbtiles -l filo

La Réunion

ogr2ogr -f GeoJSONSeq /vsistdout/ households_974.gpkg | tippecanoe -z15 --drop-densest-as-needed -P -o households_974.mbtiles -l households
ogr2ogr -f GeoJSONSeq /vsistdout/ carreaux_200m_reun.gpkg | tippecanoe -z15 --drop-densest-as-needed -P -o carreaux_200m_reun.mbtiles -l filo

Several mbtiles files can be joined in a single file in which datasets are represented as "layers":

tile-join -pk -o filo_households_france.mbtiles carreaux_200m_met.mbtiles households_france.mbtiles
tile-join -pk -o filo_households_974.mbtiles carreaux_200m_reun.mbtiles households_974.mbtiles

NOTE: While packing layers together is convenient for visualisation, it may not be the best option, for instance to embed the tiled data in a website.

The generated mbtiles can then be converted to the pmtiles format (tippecanoe tends to generate broken pmtiles files):

France

pmtiles convert households_france.mbtiles households_france.pmtiles
pmtiles convert carreaux_200m_met.mbtiles carreaux_200m_met.pmtiles
pmtiles convert filo_households_france.mbtiles filo_households_france.pmtiles

La Réunion

pmtiles convert households_974.mbtiles households_974.pmtiles
pmtiles convert carreaux_200m_reun.mbtiles carreaux_200m_reun.pmtiles
pmtiles convert filo_households_974.mbtiles filo_households_974.pmtiles

pmtiles installation

wget https://github.com/protomaps/go-pmtiles/releases/download/v1.26.1/go-pmtiles_1.26.1_Linux_x86_64.tar.gz
tar -zxvf go-pmtiles_1.26.1_Linux_x86_64.tar.gz

An online PMTiles viewer

https://pmtiles.io/