50+ Most Popular Free Open Datasets for Machine Learning

These free public datasets for a machine learning cheat sheet for high-quality datasets. These range from the vast (looking at you, Kaggle) or the highly specific (data for self-driving cars).

First, a couple of pointers to keep in mind when searching for datasets. According to Dataquest:

A dataset shouldn't be messy, because you don't want to spend a lot of time cleaning data.
A dataset shouldn't have too many rows or columns, so it's easy to work with.
The cleaner the data, the better - cleaning a large data set can be very time to consume.
There should be an interesting question that can be answered with the data.

Let's get to it!

Dataset Finders

Kaggle: A data science site that contains a variety of externally-contributed interesting datasets. You can find all kinds of niche datasets in its master list, from ramen ratings to basketball data to and even Seattle pet licenses.

UCI Machine Learning Repository: One of the oldest sources of datasets on the web, and a great first stop when looking for interesting datasets. Although the data sets are user-contributed and thus have varying levels of cleanliness, the vast majority are clean. You can download data directly from the UCI Machine Learning repository, without registration.

General Datasets

Public Government datasets

Data.gov: This site makes it possible to download data from multiple US government agencies. Data can range from government budgets to school performance scores. Be warned though: much of the data requires additional research.

Food Environment Atlas: Contains data on how local food choices affect diet in the US.

School system finances: A survey of the finances of school systems in the US.

Chronic disease data: Data on chronic disease indicators in areas across the US.

The US National Center for Education Statistics: Data on educational institutions and education demographics from the US and around the world.

The UK Data Service: The UK's largest collection of social, economic and population data.

Data USA: A comprehensive visualization of US public data.

Finance & Economics

Quandl: A good source for economic and financial data �?? useful for building models to predict economic indicators or stock prices.

World Bank Open Data: Datasets covering population demographics and a huge number of economic and development indicators from across the world.

IMF Data: The International Monetary Fund publishes data on international finances, debt rates, foreign exchange reserves, commodity prices, and investments.

Financial Times Market Data: Up to date information on financial markets from around the world, including stock price indexes, commodities, and foreign exchange.

Google Trends: Examine and analyze data on internet search activity and trending news stories around the world.

American Economic Association (AEA): A good source to find US macroeconomic data.

Machine Learning Datasets:

Images

Labelme: A large dataset of annotated images.

ImageNet: The de-facto image dataset for new algorithms. Is organized according to the WordNet hierarchy, in which each node of the hierarchy is depicted by hundreds and thousands of images.

LSUN: Scene understanding with many ancillary tasks (room layout estimation, saliency prediction, etc.)

MS COCO: Generic image understanding and captioning.

COIL100 : 100 different objects imaged at every angle in a 360 rotation.

Visual Genome: Very detailed visual knowledge base with captioning of ~100K images.

Google's Open Images: A collection of 9 million URLs to images �??that have been annotated with labels spanning over 6,000 categories�?? under Creative Commons.

Labelled Faces in the Wild: 13,000 labeled images of human faces, for use in developing applications that involve facial recognition.

Stanford Dogs Dataset: Contains 20,580 images and 120 different dog breed categories.
Indoor Scene Recognition: A very specific dataset, useful as most scene recognition models are better �??outside'. Contains 67 Indoor categories, and a total of 15620 images.

Sentiment Analysis

Multidomain sentiment analysis dataset: A slightly older dataset that features product reviews from Amazon.

IMDB reviews: An older, relatively small dataset for binary sentiment classification, features 25,000 movie reviews.
Stanford Sentiment Treebank: Standard sentiment dataset with sentiment annotations.

Sentiment140: A popular dataset, which uses 160,000 tweets with emoticons pre-removed.

Twitter US Airline Sentiment: Twitter data on US airlines from February 2015, classified as positive, negative, and neutral tweets

Natural Language Processing

Enron Dataset: Email data from the senior management of Enron, organized into folders.
Amazon Reviews: Contains around 35 million reviews from Amazon spanning 18 years. Data include product and user information, ratings, and the plaintext review.
Google Books Ngrams: A collection of words from Google books.
Blogger Corpus: A collection of 681,288 blog posts gathered from blogger.com. Each blog contains a minimum of 200 occurrences of commonly used English words.
Wikipedia Links data: The full text of Wikipedia. The dataset contains almost 1.9 billion words from more than 4 million articles. You can search by word, phrase or part of a paragraph itself.
Gutenberg eBooks List: An Annotated list of ebooks from Project Gutenberg.

Hansards text chunks of Canadian Parliament: 1.3 million pairs of texts from the records of the 36th Canadian Parliament.

Jeopardy: Archive of more than 200,000 questions from the quiz show Jeopardy.
SMS Spam Collection in English: A dataset that consists of 5,574 English SMS spam messages
Yelp Reviews: An open dataset released by Yelp, contains more than 5 million reviews.
UCI's Spambase: A large spam email dataset, useful for spam filtering.

Self-driving

Berkeley DeepDrive BDD100k: Currently the largest dataset for self-driving AI. Contains over 100,000 videos of over 1,100-hour driving experiences across different times of the day and weather conditions. The annotated images come from New York and San Francisco areas.
Baidu Apolloscapes: the Large dataset that defines 26 different semantic items such as cars, bicycles, pedestrians, buildings, street lights, etc.
Comma.ai: More than 7 hours of highway driving. Details include car's speed, acceleration, steering angle, and GPS coordinates.
Oxford's Robotic Car: Over 100 repetitions of the same route through Oxford, UK, captured over a period of a year. The dataset captures different combinations of weather, traffic, and pedestrians, along with long-term changes such as construction and roadworks.
Cityscape Dataset: A large dataset that records urban street scenes in 50 different cities.
CSSAD Dataset: This dataset is useful for perception and navigation of autonomous vehicles. The dataset skews heavily on roads found in the developed world.
KUL Belgium Traffic Sign Dataset: More than 10000+ traffic sign annotations from thousands of physically distinct traffic signs in the Flanders region in Belgium.
MIT AGE Lab: A sample of the 1,000+ hours of multi-sensor driving datasets collected at AgeLab.
LISA: Laboratory for Intelligent & Safe Automobiles, UC San Diego Datasets: This dataset includes traffic signs, vehicles detection, traffic lights, and trajectory patterns.

Sources:

https://www.forbes.com/sites/bernardmarr/2018/02/26/big-data-and-ai-30-amazing-and-free-public-data-sources-for-2018/#5406a2285f8a

https://github.com/takeitallsource/awesome-autonomous-vehicles#datasets

https://medium.com/startup-grind/fueling-the-ai-gold-rush-7ae438505bc2

https://www.dataquest.io/blog/free-datasets-for-projects/

https://gengo.ai/datasets/the-best-25-datasets-for-natural-language-processing/

https://github.com/awesomedata/awesome-public-datasets#machinelearning

Source: HOB

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