Websites related to regional GIS interests, GIS best practice, that provide spatial data content, or GIS training.

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USGS - Earth Resources Observation and Science (EROS) Center
Find Data page:

Earth Resources Observation and Science (EROS) Center is a remotely sensed data management, systems development, and research field center for the U.S. Geological Survey's (USGS) Geography Discipline.

The National Map
Home page:

Maps of America are what you'll find on™. Maps of innovation and vision that illustrate our changing Nation. Maps that capture and depict the patterns, conditions, and trends of American life. Maps that supplement interesting articles. Maps that tell their own stories. Maps that cover all of the United States or just your area of interest. Maps that are accurate and reliable from more than 20 Federal organizations. Maps about America's people, heritage, and resources. Maps that will help you, your children, your colleagues, and your friends understand the United States and its place in the world.

The Federal Geographic Data Committee
Home page:

The Federal Geographic Data Committee (FGDC) is an interagency committee that promotes the coordinated development, use, sharing, and dissemination of geospatial data on a national basis. This nationwide data publishing effort is known as the National Spatial Data Infrastructure (NSDI). The NSDI is a physical, organizational, and virtual network designed to enable the development and sharing of this nation's digital geographic information resources. FGDC activities are administered through the FGDC Secretariat, hosted by the U.S. Geological Survey.

The NOAA Sea Level Rise Tool
Home page: NOAA Viewer

This data viewer provides coastal managers and scientists with a preliminary look at sea level rise and coastal flooding impacts. The viewer is a screening-level tool that uses nationally consistent data sets and analyses. Data and maps provided can be used at several scales to help gauge trends and prioritize actions for different scenarios.


California Environmental Resources Evaluation System (CERES)
Home page:

CERES is an information system developed by the California Natural Resources Agency to facilitate access to a variety of electronic data describing California's rich and diverse environments. The goal of CERES is to improve environmental analysis and planning by integrating natural and cultural resource information from multiple contributors and by making it available and useful to a wide variety of users.

Cal-Atlas Geospatial Clearinghouse
Home page:

The Cal-Atlas site facilitates the coordinated and sustainable development, maintenance, licensing and sharing of geospatial data and web map services by California government agencies, partners and stakeholders. California government agencies work with the California GIS Council, regional GIS collaboratives and the broader California GIS community to define the data architecture, systems, standards, agreements and processes for a fully integrated and effective California Spatial Data Infrastructure.

Geospatial Information Office (Office of the GIO)
GIS page:

The California Environmental Information Clearinghouse (CEIC) uses the CERES Catalog as an online directory for reporting and discovery of information resources for California. Participants include cities, counties, utilities, state and federal agencies, private businesses and academic institutions that have spatial and other types of data resources.

California Department of Forestry and Fire Protection (CAL FIRE)
FRAP GIS page:

FRAP provides extensive technical and public information for statewide fire threat, fire hazard, watersheds, socio-economic conditions, environmental indicators, and forest-related climate change. Much of this information involves Geographic Information System (GIS) analysis, tables, maps, data and calculation tools that are available on this website.

Solano County FHSZ Map page:

Counties include proposed Fire Hazard Severity Zone Maps for State Responsibility Area lands and separate draft Very High Fire Hazard Severity Zone Maps for Local Responsibility Area lands.


Contra Costa County
GIS Home page:

The Contra Costa County GIS web site is dedicated to bringing maps and spatial information to the public, county staff and our partner agencies. Here you can find information about where we live, work and play.

Napa County
GIS Home page:

Enterprise GIS at the County of Napa dates back to 1999 when we first began to implement a county-wide mapping system. We've now gone from a few project-based GIS maps to an enterprise system that has generated nearly three million map images.

In 2011, we will continue developing customer-centric mapping applications and integrating geospatial data with other County enterprise applications. We expect to deliver more GIS services through the County's main internet site and plan to improve public access to our datasets.

Sacramento County
GIS Home page:

The mission of Sacramento County GIS is to initiate, integrate and promote the use of GIS Technology in the support of County business goals and objectives.

Solano County
GIS Home page:

The GIS staff of the Department of Information Technology is responsible for the development, access, and distribution of GIS data, technology, and mapping services to multiple departments, agencies, and users within Solano County local government.

Yolo County
GIS Home page:

The County of Yolo uses Geographic Information System (GIS) software to create interactive digital mapping applications and printed maps to support multiple County  functions. GIS is primarily being used to integrate existing databases with interactive mapping applications.


City of Vallejo
Planning Division Home page: Vallejo Planning Division

The Planning Division primary functions are advanced planning and current planning.


Metroplitan Transportation Commission (MTC)
GIS page:

Created by the state Legislature in 1970 (California Government Code § 66500 et seq.), the Metropolitan Transportation Commission (MTC) is the transportation planning, coordinating and financing agency for the nine-county San Francisco Bay Area.

North Bay GIS User Group

The User Group is comprised of North Bay GIS users of all levels and from a wide range of specialties (local government, wine industry, non-profit, public works, public safety, survey, etc.). We meet every other month to share ideas, methodology, and our latest projects.


Association of Bay Area Governments (ABAG)
Home page:

ABAG is committed to enhancing the quality of life in the San Francisco Bay Area by leading the Region in advocacy, collaboration, and excellence in planning, research, and member services.

Bay Area Automated Mapping Association (BAAMA)
Home page:

BAAMA is a non-profit, professional organization that organizes bi-monthly educational forums, the annual California GIS Conference, and periodic technical tours on a broad range of geographic information systems (GIS) and automated mapping topics.

California Geographic Information Association
Home page:

California Geographic Information Association (CGIA) is a non-profit, statewide association formed in 1994 to facilitate coordination, collaboration, and advocacy for California's Geographic Information System (GIS) community. CGIA promotes the creation and maintenance of the best practices in the governance and application of geographic information within the State of California that can become a model for the nation.

Home page:

Founded in 1963, URISA - The Association for GIS Professionals - is a leading provider of learning and knowledge for the GIS community. URISA connects great ideas and great people to inspire leadership and achievement. We strive to provide exceptional educational experiences, a vibrant and connected community, and the essential resources you need to be successful in your career.


Vacaville Heritage Council
Maps page:

The Vacaville Heritage Council is a non-profit historical archives and research organization specializing in local Solano County History.

Statewide Database (SWDB)
Home page:

The Statewide Database (SWDB) is the redistricting database for the state of California. In 2001, these data were used for state legislative and local redistrictings following the 2000 Census as mandated by law. On this site, you will find voting, registration and geographic datasets for the State of California for statewide elections beginning in 1992.


Environmental Systems Research Institute (ESRI)

Home page:

A geographic information system (GIS) allows us to view, understand, question, interpret, and visualize data in many ways that reveal relationships, patterns, and trends in the form of maps, globes, reports, and charts. More