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.
pimlottc
Just to quibble slightly, it does not seem to include US territories such as Guam [0] and American Samoa [1], but still quite impressive!
Are these public courts only? Are residential courts included? I have a tough time believing there are only 59k outdoor courts in the US.
refulgentis
there's ~0% chance there's only 50K outdoor basketball courts in the US. Other comments observe a ~30% false positive rate. So this is probably "a yeoman's ML pass at a lot of map tiles I scraped" more than "satellite imagery of every outdoor basketball court"
robertclaus
Doing some research on schools, parks, churches, etc. where courts commonly are implies the number of courts here may be way too low. I assume this was a model trained by manually curated examples, so I wonder if a class of examples was missing from the training data.
hi_hi
Are there any technical details available on how these images were captured. I'm assuming some form of Vision AI (YOLO?) was leveraged. What source data was used, and how was it processed?
I'm interested in doing something similar for tennis courts.
kuschkufan
The other comments are a let down so far. I find this impressive!
sandworm101
Seems to only include public outdoor courts. The many private courts, at least the handful i know about, must not have been in the database.
RockRobotRock
The browser tab choked at 42k. Windows 11/Firefox
greencore
It seems that no one is playing basketball these days... It looks like that only one out of 10 has players.
poopsmithe
The page reliably crashes my Firefox
system7rocks
Is there a reason I can't find any courts in Oklahoma?