Delta Aquatic Resource Inventory (DARI) is a detailed base map of the Sacramento-San Joaquin Delta's aquatic features that include wetlands, open water, streams, ditches, and tidal marshes. DARI was developed using a Geographic Information System (GIS) and heads up digitizing, with true color imagery, LiDAR, and a suite of ancillary data sources to consistently map aquatic resources throughout the Delta. The draft GIS dataset was reviewed by regional wetland scientists and stakeholders to ensure it is accurate as possible. Aquatic features were hand-digitized while referencing ancillary national and local datasets for elevation, frequency of inundation, management, and previous mapping of streams and wetlands. Google Earth aerial imagery was used for confirming seasonal variations. Learn more about DARI mapping procedures and standards in the DARI Standards and Methods document.

DARI may be periodically updated through a map stewardship effort.  Local wetland scientists and managers can suggest updates to improve the accuracy and detail of the GIS dataset using the CARI Editor Tool on EcoAtlas. DARI will be integrated into the California Aquatic Resources Inventory (CARI), which is publicly accessible on EcoAtlas.  CARI is the statewide standardized dataset intended to support regional watershed restoration planning and tracking,  

Creation Date: 
Wednesday, February 16, 2022
Last Updated: 
Wednesday, February 16, 2022
Type of Data: 
GIS vector dataset
Programs and Focus Areas: 
Environmental Informatics Program
Geographic Information Systems
Location Information
General Project Location(s): 
Sacramento-San Joaquin Delta
Data Availability
Please Cite This Dataset as: 

San Francisco Estuary Institute (SFEI). 2022. Delta Aquatic Resource Inventory (DARI), Version 1.1 GIS Data. Accessed [date retrieved].

Terms of Use: 

Copyright 2022 San Francisco Estuary Institute.

DARI is free data: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

DARI is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

More information about GNU General Public License is available at data are available without restriction upon use with the following caveats. Prudent usage, knowledge of the data quality, and professional courtesy should all be considered in obtaining and using SFEI data. As this dataset is NOT a survey document, neither use it as such nor use it beyond the limits of the source scale. Please read and fully comprehend all available metadata prior to data use. SFEI requests that the use of these data in any map, publication, or report should include citation of the data source(s) used and give proper attribution and credit to the originators of the data. Questions about SFEI data may be directed to the GIS Manager, at 510-746-7334.

Data File(s): 
Package icon DARIv1.1_2022_02_28.zip53.78 MB