This site provides National foundation-level geospatial data within the open public domain that can be useful to support community preparedness, resiliency, research, and more. Compatible with use in ArcOnline,
M-Lab aims to advance Internet research by empowering consumers with useful information about their Internet performance. By providing free, open Internet measurement data, researchers, regulators, advocacy groups, and the general public can get a better sense of how the Internet is working for them, and how to maintain and improve it for the future.
The NYC Space/Time Directory will make urban history accessible through a set of resources including: a searchable atlas of New York past, an historical location directory and geocoder, a set of APIs and data sets, and a discovery tool linking NYPL collections together in an historical and geographic context.
TIGER products are spatial extracts from the Census Bureau's MAF/TIGER database, containing features such as roads, railroads, rivers, as well as legal and statistical geographic areas. The Census Bureau offers several file types and an online mapping application.