famfamfam icons are free and require no attribution and are quite small:
The Noun Project has a Flags of the World Collective, although it is not complete, and not in the desired formats of OP, but I just wanted to add them for everyone else who comes through here:
Sounds like a case forOpenAerialMap, which after a hiatus, looks like it might get a reboot. Wish I could think of something that was active. They already have a functional beta:
The OSM wiki also has some notes on aerial imagery.
Wikipedia has images for flags of most countries which are normally licensed as Creative Commons and in general National Flags are considered ineligible for copyright as being in the public domain but it is nice to give attibution in your documentation.
Note that usage may be restricted in other ways - e.g. using the German Flag in a program that promotes ...
There is a Google Internationalization project called Region Flags that structures the Wikipedia data.
This package is a collection of flags for BCP 47 region codes. Most people think of these as country flags, but there are a few codes / flags that do not correspond to countries. The flags are in SVG and PNG format and named by their BCP 47 region code, ...
If you don't need programmatic access (i.e. an API), you can use the Google Advanced Image Search.
You can also get there by following these simple steps:
Go to search.creativecommons.org
Enter your search term (e.g. berlin)
Select your license requirements (use for commercial purposes and/or modify, adapt, or build upon)
Click on Google Images
On Google ...
USDA has a vast ecosystem that can be tapped into for this kind of imagery.
CropScape hosts a geospatial data product called the Cropland Data Layer (CDL). The CDL is a raster, geo-referenced, crop-specific land cover data layer created annually for the continental United States using moderate resolution satellite imagery and extensive ...
Have you tried University of Michigan? They have some large datasets available for download from their test runs around campus:
We provide a dataset collected by an autonomous ground vehicle
testbed, based upon a modified Ford F-250 pickup truck. The vehicle is
outfitted with a professional (Applanix POS LV) and consumer (Xsens
MTI-G) Inertial ...
Using a Advanced Google Image Search, you can search based on file type (SVG, not PDF) and also usage rights. If you want a common theme for all buttons, then you can use this tool to find single websites that host similarly designed images that meet your criteria.
Here is an example of the Resize Buttons with SVG. You'll have to filter by license for your ...
The Art section of Datahub.io has several good candidates -
For example, the Wikimedia Paintings page. It's not an API, but you can download all image files from this page by a command like this:
wget -r -P /save/location -A jpeg,jpg,bmp,gif,png http://commons.wikimedia.org/wiki/Category:Paintings
(at the moment, this command doesn't work for me, but it ...
earth explorer via usgs has a slew of satellite datasets, although i'm not sure if they meet your requirements 100%. Aerial Imagery/Aerial Photo Mosaics on Earth Explorer:
Aerial Photo Single Frames
Antarctic Flight Line Maps
Antarctic Single Frames
High Resolution Orthoimagery
I think you're unlikely to find this as true "open data," since there are substantial privacy concerns to internet traffic monitoring, and the volume of data involved to do proper analysis is considerable.
That said, there is an organization, the Center for Applied Internet Data Analysis (CAIDA), which makes datasets available to researchers under oversight....
If you're willing to get your hands dirty, there are plenty of websites out there that post mugshots of arrested individuals. Many of these come with height and weight attributes. With a little scraping you could have as many photos as you could possibly want. You might have to deal with watermarks and artifact removal though.
As an example, here is a ...
You may be able to use the International Picture Naming Project (IPNP), but I think the total pictures are way less than 10k.
Here's a link to the query tool.
You may get lucky searching through "image recognition" research websites. Here's one compilation of online resources, and a particular one.
I was not able to find anyone collecting leaflets for Europe generally.
Here are some sites I did find.
Ireland: http://irishelectionliterature.wordpress.com/ including Irish candidates for European Parliament elections
Australia: http://www.electionleaflets.org.au/ accepts public contributions
Los Angeles: http://digital.library.ucla.edu/campaign/ accepts ...
WMO OSCAR has a (complete?¹) list of current space-borne high resolution optical imagers, defined as instruments with a "spatial resolution in the range of less than 1 m to a few 10 m.". Scroll down to "Current instruments". I'm not an expert in high-resolution optical imagers, but I suspect the problems are as follows:
The higher the resolution, the ...
I created a dataset with of on-line data. It has 369 symbols (including a-z A-Z 0-9 \alpha-\omega), but it is online data. You will have to create the rendered versions yourself:
Each class has at least 50 recordings. (I don't have much data for letters, so it will probably not be more.)
edit: I've redered it. See The HASYv2 ...
You'll have to go through the list yourself to find the dataset that includes age of the face, or other demographics.
There is a long list of face databases at the Face Recognition Home Page. Searching for " age " on the page.
When benchmarking an algorithm it is recommendable to use a standard test data set for researchers to be able to directly compare ...
The Philippine government with the aid of the UN has been doing LiDAR mapping of the major river basins. Here's a press release:
It appears the effort is part of the Philippines DREAM project (for disaster risk/assessment):
The University of the Philippines Los Banos has a page for LiDAR ...
have you tried Tate's collection? It has quite straightforward JSON (each artist has its own JSON file) and CSV formats and no OAuth key needed I think: https://github.com/tategallery/collection
or try Rijksmuseum: http://rijksmuseum.github.io/
Can you find something on OpenfMRi?
"The OpenfMRI project was established in 2010 to provide a resource for researchers interested in making their fMRI data openly available to the research community."
There are 34 datasets at this time.
For Berlin you can get data from the Berlin OpenData Portal: https://daten.berlin.de/
Here is the Dataset with the Buildings: https://daten.berlin.de/datensaetze/alkis-berlin-geb%C3%A4ude-wfs
At this moment the Link looks broken, but i found this WFS Service, which should contain the same data:
I finally found exactly what I was looking for : 113,205 pictures of 1000 different plants.
It was curated and is hosted as part of the CLEF competitions held every year, and it is therefore enriched every year through crowdsourcing.
Open Data Ottawa's data portal has this data:
Traffic Web Cam Images Dataset
"Provides images for the City of Ottawa's traffic web cams. These images are available at sixty second intervals. To access the images users will be required to have an access key."
More Options, and Resources:
Application form for access keys
Caltech Has Two Car ...
The University of Wisconsin Lidar Group provides several LIDAR data sets here.
The Institute of Meteorology of the University of Hamburg, Germany, provides LIDAR data here.
You might also have a look into the EBAS database of the NILU (Norwegian Institute for Air Research). It hosts several air quality datasets from all over Europe and also from some non-...
flickr public domain search for cc images of Paintings....you'll probably want to fine tune the search terms, because these results aren't all paintings, but this is what flickr commons have yet to fail me: