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It's bold, and in many ways it's just my opinion, but having analyzed the ease data access of most developed nations, the French data sources are the only ones

It's bold, and in many ways it's just my opinion, but having analyzed the ease data access of most developed nations, the French data sources are the only ones I felt like I wasn't missing some basic data in a significant manner. Cadastre is lacking postcode-wise, but it can be easily complemented with the data here [2]. Sibling parent already mentioned BAN, but you can also check cadastre [0] which is the main source of polygon data for France on OpenStreetMap. Under the general subdomain [1] you have access to all sorts of stuff, but geography wise, there are plenty of geotagged aerial photographs, both historical and current. You also have shapefile data for towns, regions, postal codes, you name it. No shenanigans, all official, verified, and regularly updated. [0] https://cadastre.data.gouv.fr/ https://cadastre.data.gouv.fr/ [1] https://data.gouv.fr/ https://data.gouv.fr/ [2] https://datanova.legroupe.laposte.fr/explore/?sort=modified https://datanova.legroupe.laposte.fr/explore/?sort=modified

maelito 5y ago
You can also visualize the price of all the residential transactions in a given zone. This house was sold twice, in 2015, in 2018, at 350 000€, for 105m² of constructed area, and 150m² in total. I guess it is groundbreaking for most countries. https://app.dvf.etalab.gouv.fr https://app.dvf.etalab.gouv.fr
teruakohatu 5y ago
New Zealand has very high quality data. Every single address is in a open database that can be queried or downloaded. It also includes building outlines, roads, land parcel shapes, aerial photos, elevation data and more. OSM for NZ was originally copied from official data, and even before OSM the community used the open data to make high quality map files for GPS devices that were superior to the paid maps. It would be nice for property prices to be included the central government data. It is free and publicity available but from each municipality or many websites that republish the data along with analytics. https://data.linz.govt.nz/ https://data.linz.govt.nz/
- Uberphallus 5y ago
  Honestly I hadn't looked into NZ, I centered my attention mostly to NA, Europe and China. It looks pretty good, and in the same level of coverage as France. That's a wonderful surprise! I'll keep that in mind if I ever go back to this subject.

maelito 5y ago

You can also visualize the price of all the residential transactions in a given zone. This house was sold twice, in 2015, in 2018, at 350 000€, for 105m² of constructed area, and 150m² in total. I guess it is groundbreaking for most countries. https://app.dvf.etalab.gouv.fr https://app.dvf.etalab.gouv.fr

teruakohatu 5y ago

New Zealand has very high quality data. Every single address is in a open database that can be queried or downloaded. It also includes building outlines, roads, land parcel shapes, aerial photos, elevation data and more. OSM for NZ was originally copied from official data, and even before OSM the community used the open data to make high quality map files for GPS devices that were superior to the paid maps. It would be nice for property prices to be included the central government data. It is free and publicity available but from each municipality or many websites that republish the data along with analytics. https://data.linz.govt.nz/ https://data.linz.govt.nz/

Uberphallus 5y ago
Honestly I hadn't looked into NZ, I centered my attention mostly to NA, Europe and China. It looks pretty good, and in the same level of coverage as France. That's a wonderful surprise! I'll keep that in mind if I ever go back to this subject.