The EMNIST dataset is a set of handwritten character digits derived from the NIST Special Database 19 and converted to a 28x28 pixel image format and dataset structure that directly matches the MNIST dataset." From https://www.nist.gov/itl/iad/image-group/emnist-dataset
Original url is http://www.itl.nist.gov/iaui/vip/cs_links/EMNIST/matlab.zip
We uploaded the same file to our S3 bucket for faster download.