Various attempts at scanning aerial imagery to detect baseball diamonds.
Based on a friend's suggestion, I'm going to try training a neural network to detect baseball diamonds from aerial imagery.
Finding source images
Once I grabbed a suitable number of images (a small area around Minneapolis turned up ~1000 images), I got tired of looking through them one-by-one and used ImageMagick's montage tool to put them together into a pretty neat image like this:
montage diamond*.jpg montage.jpg