California Spatial Information Library (CaSIL)
Welcome to the California Spatial Information Library. CaSIL provides free online access to
some of California’s digital physical and cultural geospatial information. CaSIL was created
to provide a central location where State and federal agencies and regional/local governments can
provide their GIS data sets. We encourage your contributions, participation, and feedback in
making CaSIL a dynamic and constantly improving resource.
- CaSIL - the California Spatial Information Library is at
casil.ucdavis.edu/casil. CaSIL is an online
library of California's geospatial data, including base map or framework data (e.g., hydrography,
topography, transportation, etc.). You may use FTP
or HTTP to access the CaSIL data holdings and treat
them as one big file system. The collections are organized thematically.
- Frequently Accessed Data Layers
This is a collection of commonly used GIS datasets for California. It includes datasets formally
offered by the Teale Data Center. Most data are maintained in an Albers projection to enable
overlay and integration functions and statewide analyses, and are organized by theme.
- Interactive Mapping is a starting
point for various online geographic access tools for California.
News - Recent Changes to CaSIL
In order to provide better service, CERES has split some of its geographic information systems among
multiple servers. Here are some of the changes that users should see:
- casil.ucdavis.edu has this new front page.
- CaSIL is now
- Most datasets have been converted to North American Datum (NAD) 83.
- The previous organization of CaSIL, based on data provider, will be made available for a
limited amount of time at: old.casil.ucdavis.edu/casil.
This directory structure is no longer supported, and will be removed in early 2007.
- The CaSIL gforge system has been moved to
gforge.casil.ucdavis.edu. This system allows for collaborative development of geospatial
data, and provides tools for file archives, mailing lists, forums, etc.
Note: CMCC continues to update and improve spatial data in the library and provide access or
links to more up-to-date data served by others as need and funding permit. Caution should be
exercised when using some of the geospatial data layers as some layers are somewhat outdated;
particularly those datasets that change rapidly (i.e., schools, health facilities, etc.). We
strongly recommend that users refer to the metadata or information about GIS datasets for appropriate
uses of the data, source information, scale information, and general quality.
We would like to gratefully acknowledge NASA's past funding support for
CaSIL under Cooperative Agreement Notice 97-MTPE-02.
News from Gforge