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Comment by AznHisoka | Hacker News Reader

Geocoding might be a corner case in terms of the usefulness of open data. The most valuable data is usually owned by huge corporations with lots of users (ie Amazon, Yelp, Visa, Google). Data usually is valuable because it's compiled from the usage of many people. So the only way to really build an API from that is to scrape them.

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Check out OpenAddresses: we're trying to solve the address/location data aggregation problem so you don't have to. We do all the data scraping and collating for you so you can work on making a geocoder. https://openaddresses.io/

I'd add government data, their open data portals are often subpar. For example in Germany the national weather data was made (licensed) open data this week (in German https://www.golem.de/news/deutscher-wetterdienst-wetterdaten...)

It's one thing that the uk seems to do pretty well at https://data.gov.uk lots of data available. Not all in uniform format but it is at least available

Eurostat (the EUs statistics institiution) also has a lot of statistics freely available http://ec.europa.eu/eurostat/data/statistics-a-z/abc with permissive license, data download in CSV and XML as well as a REST service. Their online data viewer isn't pretty, but one of the more powerful examples as well.

https://www.data.gov is pretty great for the U.S. Government’s open data

Canada has a bunch available as well: http://open.canada.ca/en/open-data

What are some good websites/apis built using government data? AFAIK, most countries have started publishing open datasets about things such as weather, transportation, politician backgrounds, even law!

But I've yet to see some useful websites/apis built on top of them. Most are related to politics, visualization and/or research (which is a laudable enough but doesn't make them worth checking regularly).

Or you could get many people and organizations to contribute data under an open license. That's exactly what OpenStreetMap is: http://www.openstreetmap.org

https://opencorporates.com/info/working_for_the_public_good in the UK might be another example. They don't seem to run to make profit and one can download their huge compiled data sets.

OpenLibrary is pretty useful too, in part because Amazon's product API has aggressive license restrictions

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