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Comment by Algemarin | Hacker News Reader

I zoomed into a handful of random spots, and quite a few (maybe 30%) do not appear to show basketball courts at all. Many seem to be just rooftops or construction sites.

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The labels seem to be taken from OpenStreetMap, so blame imperfect labelling there.

I guess taking labels from OSM is akin to taking your facts from Wikipedia (except that Wikipedia actually tends to be pretty well curated these days).

In fairness to OSM volunteers, a lot of Wikipedia's subject space is historical or otherwise relatively stable, while everywhere OSM maps is in danger of being changed in the real world. Just comprehensively mapping one small town takes many hours and by the time you work your way through region much of what you mapped will be different IRL. Aerial photography only updates periodically, which helps in a sense but also hurts because anything you map with that will most likely be outdated from the start.

I saw one that showed a soccer field and looked on openstreetmap and saw it has a basketball court labeled there.

Weird... I zoomed into hundreds, and saw 2 or 3 that weren't accurate. YMMV i guess

Also saw a bunch of tennis courts

"Bethpage, NY" is not a basketball court...

I wonder if it's including indoor courts?

Unlikely, I zoomed in on one that had a pool with round edges within a square concrete area that had the rough geometry of a basketball court and I imagine a image recognition engine being confused by that.

Don’t your neighbors dunk off their roof?

One that I saw was a baseball field

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