Chico State University, California DWR. 20010607 2001.6 vector digital data California Department of Water Resources Created by Jason Schwenkler http://bios.dfg.ca.gov ftp://ftp.dfg.ca.gov/BDB/GIS/BIOS/Public_Datasets/500_599/ds586.zip The original topographic maps containing the drawn delta border were scanned from the Department of Water Resources. Images were registered to 1:24,000 USGS DRG's in ArcView (ESRI) utilizing imagewarp extension. The Delta boundary was digitized from the registered images. Accuracy within acceptable 7.5 Minute USGS map accuracy standards (1:24000 scale). Delta boundary version 2002.4. The original legal boundary maps obtained from the Delta Protection Commission were compiled by DWR Land and Right of Way sometime in the early 1980's. They were based from the legal description in section 12220 of the Water Code, with ambiguities in the Code addressed by the individuals involved in the mapping project at that time. One revision was made to the original maps in the vicinity of Point Pleasant, and is the only difference between this and the 4.2001 version of the legal Delta boundary Arc/INFO coverage. Delineates the legal Delta established under the Delta Protection Act (Section 12220 of the Water Code) passed in 1959. First draft completed 4/25/2002. Received from Chico State by DWR Central District Delta Levees Program 5/31/2001. Converted from shapefile into coverage format, reprojected from Teale Albers into UTM Zone 10, rebuilt topology, evaluated against basemaps and pre-existing boundary layers, and cataloged into Delta GIS Library (all using Arc/INFO 8.0.2) by Joel Dudas, 5/2001. The revision between the 4.2001 and the 4.2002 versions reflects a change in the vicinity of Point Pleasant in the east Delta, as shown on modified Delta Protection Commission maps. The line was moved south to the township boundary line, as appropriate, using ArcGIS 8.1 software. During 2001 & early 2002 every effort was made to identify any errors in the underlying data sources, including water district, reclamation district, roads, etc. boundaries. While certain features were not able to be 100% certified, this coverage can be considered to be as accurate based on all of the information available at this time. 20010531 publication date Complete None planned -121.955328 -121.195356 38.592858 37.616402 None Legal Delta boundary boundary ISO 19115 Topic Category inlandWaters boundaries None Delta None 2002 None given. Disclaimer: The State makes no claims, promises, or guarantees about the accuracy, completeness, reliability, or adequacy of these data and expressly disclaims liability for errors and omissions in these data. No warranty of any kind, implied, expressed, or statutory, including but not limited to the warranties of non-infringement of third party rights, title, merchantability, fitness for a particular purpose, and freedom from computer virus, is given with respect to these data.DWR does not acknowledge any legal responsibility for the use or misuse of these data. These data should be considered for evaluation and contextual information only. It is not intended to be used for survey-grade assessments. California Department of Water Resources Joel Dudas Water Resources Engineer 916-227-7610 916-227-7600 jdudas@water.ca.gov Jason Schwenkler Project Manager Geographical Information Center 1st and Orange Streets Chico, California 95929-0425 530 898-5969 office 530 898-6781 fax schwenkl@gic.csuchico.edu Joel Dudas Department of Water Resources Delta Levees Program PO Box 942836 Sacramento, CA 94236-0001 Version 6.2 (Build 9200) ; Esri ArcGIS 10.6.1.9270 Chico State University 1 Reprojected first from UTM Zone 10 NAD27 to California Teale Albers NAD27. Then, later reprojected from California Teale Albers NAD27 to California Teale Albers NAD83. 20020101 California Department of Fish and Game Will Patterson geodata@dfg.ca.gov Metadata edited - ISO keywords added. 20061025 California Department of Fish and Game Will Patterson geodata@dfg.ca.gov Vector GT-polygon composed of chains 1 NAD 1983 Albers 34.0 40.5 -120.0 0.0 0.0 -4000000.0 coordinate pair 0.0001 0.0001 meter D North American 1983 GRS 1980 6378137.0 298.257222101 ds586 OBJECTID Internal feature number. Esri Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. DELTA_LEGA DELTA_LE_1 DELTABOUND ID COMMENTS Shape_Length Length of feature in internal units. Esri Positive real numbers that are automatically generated. Shape_Area Area of feature in internal units squared. Esri Positive real numbers that are automatically generated. 20220315 California Department of Water Resources Joel Dudas Water Resources Engineer 916-227-7610 FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 local time