GIS historical habitat and river channel data from the Delta Historical Ecology project
San Francisco Estuary Institute (SFEI). 2012. "Delta Historical Ecology GIS Data". Accessed [date retrieved]. http://www.sfei.org/content/delta-historical-ecology-gis-data.
As with any map or GIS layer, confidence or certainty varies geographically due to differences in source data or methods. This geodatabase provides direct information about the certainty level of different areas and features to allow the user to intelligently assess the applicability of the data for the chosen technical question. For more detail about methods refer to the project report as well as the paper:
Grossinger RM, Striplen CJ, Askevold R, Brewster E, Beller EE. 2007. Historical landscape ecology of an urbanized California valley: wetlands and woodlands in the Santa Clara Valley. Landscape Ecology.:103-120.
Technical users are strongly encouraged to read the full study report (Whipple et al. 2012) to gain a stronger understanding of the strengths and limitations of the dataset. In no event shall the creators, custodians, or distributors of this information be liable for any damages arising out of its use (or the inability to use it). These data are not legal documents or of survey quality and are not intended to be used as such. Although extensive effort has been made to produce error-free and complete data, all geographic information has limitations due to the scale, resolution, date, and interpretation of the original source materials. Users should consult available data documentation (metadata and report) for these particular data to determine limitations and the precision to which the data depict distance, direction, location or other geographic characteristics.
Data may be subject to change without prior notification. If this data is modified, changes should be documented in a metadata record that should accompany all redistributed data. If data is transmitted or provided in any form to another user, the data must be accompanied by a copy of this disclaimer and all documentation provided with the original data set, including the full metadata record. SFEI-ASC requests that the use of these data in any map, publication, or report should cite this study or the direct data source(s) used and give proper attribution and credit to the originators of the data.
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