348 • Big Data Analytics
information is available as well. In fact, USGS supports data and news for
the following items:
• Climate and land use change
• Core science systems
• Ecosystems
• Energy and minerals
• Environmental health
• Natural hazards
• Water. Another US government resource is the FEMA map service
center at https://msc.fema.gov/webapp/wcs/stores/servlet/FemaW
elcomeView?storeId=10001&catalogId=10001&langId=-1. A large
concern of FEMA regards issues with oods, including historical
ood maps. e interested user can nd historical information at
the National Historical Geographic Information System (NHGIS; at
https://www.nhgis.org/), free of charge.
We must bear in mind that these free “databases” are really structured
les and ...