| National Map by USGS|
"The National Map is a collaborative effort among the USGS and other Federal, State, and local partners to improve and deliver topographic information for the Nation. The National Map is easily accessible for display on the Web, as products and services, and as downloadable data. The geographic information available from The National Map includes orthoimagery (aerial photographs), elevation, geographic names, hydrography, boundaries, transportation, structures, and land cover."
| NCBI: National Center for Biotechnology Information|
"As a national resource for molecular biology information, NCBI's mission is to develop new information technologies to aid in the understanding of fundamental molecular and genetic processes that control health and disease."
| NOAA: National Oceanic and Atmospheric Administration|
NOAA is a governmental agency tasked with researching, monitoring and forecasting the weather, climate and oceans.
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