The Northeast Ocean Data Working Group is developing an interactive atlas of human and environmental aspects of the ocean in New England. The site includes maps and data downloads.

Download the latest ESRI data & maps layers, which include water resources.
Older editions are available on CD-ROM here: Rotch Library - GIS Collection |CDROM G70.212.E776 2006

Hydrography data for the country available to download

Downloadable spatial data files related to water for exploration and analysis.

The USGS Woods Hole Science Center`s Information Archives is responsible for maintaining and updating inventories of all pertinent data and other information. Examples of such information include cruise data, map collections, and publications.

You can view FIRMS and FIS for individual communities.
FIRMS from 2012 for all of Middlesex county are available here: Rotch Library - GIS Collection | G3763.M5C32 2012.F4

A variety of data and reports related to wetlands

The Food and Agriculture Organization of the United Nations' Information System on Water and Agriculture. It includes downloadable data by continental region for hydrological basics, river, dams, precipitation and evaporation.

Visitors can search by data types, date, and regions. Includes information on marine, continental and polar environments. Includes a global bathymetry database, which allows users to look at maps and download grids.

Current and historical data from buoys around the world.

Access a variety of data on ocean salinity and temperature. Not all data will be in a .shp file format.

Natural Earth is a resource for making custom maps. Data include administrative boundaries, parks and protected areas, populated places, hydrology, and bathymetry in vector format. There is also raster data for land cover, shaded relief, ocean water, and drainages with lakes.

Data from the United Nations Environment Programme World Conservation Monitoring Centre that includes downloadable data on ocean temperature, coral reefs, mangroves, seagrasses, biodiversity, and protected areas.

Ecoregions of the world, hydrology, wetlands, etc.

Download elevations above and below sea level (use either ETO option), ice, bedrock, or coastal relief models in a variety of formats. 3-second to 1-minute resolution depending on the data set.

The following gridded bathymetry data sets available:

-The GEBCO_08 Grid — a global 30 arc-second grid
largely generated by combining quality-controlled ship depth soundings with interpolation between sounding points guided by satellite-derived gravity data.

- The GEBCO One - a global one arc-minute grid
Released: 2003, updated: 2008 — largely based on the most recent set of bathymetric contours contained within the GEBCO Digital Atlas.

Visitors can search by data types, date, and regions. Includes information on marine, continental and polar environments. Includes a global bathymetry database, which allows users to look at maps and download grids.

A general site for data related to bathymetry & global relief, earth observations from space, geomagnetic data & models, marine geology & geophysics, natural hazards, and space weather & solar events.

NOAA Electronic Navigational Charts (NOAA ENC®) are vector data sets. NOAA ENCs conform with the International Hydrographic Office (IHO) S-57 international exchange format, comply with the IHO ENC Product Specification, and are provided with incremental updates that supply Notice to Mariners corrections and other critical changes. NOAA ENCs and updates are available for free download.

The USGS Woods Hole Science Center`s Information Archives is responsible for maintaining and updating inventories of all pertinent data and other information. Examples of such information include cruise data, map collections, and publications.

The portal provides a service for viewing and downloading a harmonised Digital Terrain Model (DTM) for the European sea regions that is generated by the EMODnet Bathymetry partnership on the basis of the gathered data sources.