Railroad engineer oiling up before the start

This image dataset is generated from our world's largest public domain image database. Made in two steps (manual, and image recognition), it comprises of more than 35,000 images of all types and sizes - an astonishing number if keep in mind that the total number of steam locomotives ever built was just one order of magnitude larger. All images are in the public domain, so there is no limitation on the dataset usage - educational, scientific, or commercial. Please contact us if you need a dataset like this, we may already have it, or, we can make one for you, often in 24 hours or less.