Shoreline of Ancient Lake Cahuilla

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Redlands Institute, University of Redlands
Publication_Date: 20000204
Title: Shoreline of Ancient Lake Cahuilla
Geospatial_Data_Presentation_Form: vector digital data
Online_Linkage:
http://www.institute.redlands.edu/salton/downloads/shapefiles/lk_cahuilla.zip
Description:
Abstract:
During the mid-Pleistocene, eroded sediments from the Colorado Plateau were deposited into the Colorado River Delta to form a natural sediment dam across the Salton Trough. Over time the same actions that formed the dam also altered the course of the Colorado River to flow north, creating periodic stands of water in the Salton Basin. Using LANDSAT-TM images of the Salton Sea Basin, Digital Ortho Quarter Quads and GPS two under-graduate students from the University of Redlands confirmed the elevation of shoreline evidence from Lake Cahuilla at approximately 40 feet above sea level.
Purpose: These data are intended for geographic display and analysis.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20000204
Currentness_Reference: publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -116.313034
East_Bounding_Coordinate: -115.241954
North_Bounding_Coordinate: 33.770057
South_Bounding_Coordinate: 32.407546
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Cahuilla Indians
Theme_Keyword: Native Americans
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: California
Place_Keyword: Salton Sea
Place_Keyword: Salton Sink
Place_Keyword: Salton Basin
Place_Keyword: Imperial Valley
Place_Keyword: Coachella Valley
Place_Keyword: Salton Trough
Access_Constraints: None
Use_Constraints: None
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Lewis, Lisa
Contact_Organization: Redlands Institute, University of Redlands
Contact_Address:
Address_Type: mailing and physical address
Address: 1200 E. Colton Ave.
City: Redlands
State_or_Province: CA
Postal_Code: 92373
Country: USA
Contact_Voice_Telephone: 909-335-5268
Contact_Facsimile_Telephone: 909-307-6952
Browse_Graphic:
Browse_Graphic_File_Name: None
Data_Set_Credit: Redlands Institute, University of Redlands
Security_Information:
Security_Classification_System: None
Security_Classification: Unclassified
Security_Handling_Description: None
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.780
Cross_Reference:
Citation_Information:
Originator: Dibblee, T. W., Jr
Publication_Date: 1954
Title: Geology of the Imperial Valley region, California
Series_Information:
Issue_Identification:
Geology of Southern California, California Division of Mines and Geol. Bull. 170: 21-28.
Publication_Information:
Publisher: California Division of Mines and Geology
Cross_Reference:
Citation_Information:
Originator: Downs, T. & G. D. Woodward
Publication_Date: 1961
Title:
Middle Pleistocene extension of the Gulf of California into the Imperial Valley
Series_Information:
Issue_Identification: Geol. Soc. of Am. Special Paper 68: 21
Cross_Reference:
Citation_Information:
Originator: Waters, Michael R.,
Publication_Date: 1981
Title:
Holocene lacustrine chronology and archaeology of ancient Lake Cahuilla, California
Publication_Information:
Publisher: Department of Geosciences, University of Arizona
Cross_Reference:
Citation_Information:
Originator: Wilke J. P.,
Publication_Date: 1978
Title:
Late prehistoric human ecology at Lake Cahuilla, Coachella Valley, California
Series_Information:
Issue_Identification:
Univ. of Calif. Arch. Res. Facility, Berkeley, California: Number 38, May.
Publication_Information:
Publisher: UC Berkeley
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report: Attributes are estimated to be 95% correct.
Logical_Consistency_Report:
Polygon and chain-node topology present. Topology has been verified checking for zero and multiple attribute label points, checking dangles, and examining node errors.
Completeness_Report:
The data set has no generalization, and no data was intentionally omitted.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report: Estimated to be +/- 40 feet
Quantitative_Horizontal_Positional_Accuracy_Assessment:
Horizontal_Positional_Accuracy_Value: +/- 40 feet
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator:
Joseph E. Buckles, Dr. Timothy Krantz, Salton Sea Database Program, University of Redlands
Publication_Date: Unpublished Material
Title:
Reconstruction of Prehistoric Shorelines for Cultural Restraints using GIS
Source_Scale_Denominator: 24,000
Process_Step:
Process_Description:
LANDSAT-TM images of the Salton Sea Basin offered the first preliminary look at possible areas where the shoreline was visible from space. Digital Ortho Quarter Quads were utilized in areas in which the shoreline was not visible from space and for increased accuracy of preliminary shoreline elevations. Global Positioning Units were primarily used to collect control points at areas where shoreline evidence such as tufa deposits, differences in soil composition, or other geomorphic features were present. Using the GPS receiver, clusters of 180 geographic positions were collected for post-processing in the laboratory. Post-processing involved differential correction and determination of a centroid within the point cluster. The control points were then plotted on 7.5-minute digital raster graphics (DRGs). Elevations of the control points were correlated with a digital elevation model (DEM) to produce a shoreline delineation at 11.9m asl. Results Of the fourteen control points taken, three were eliminated due to inconsistencies with GPS satellite telemetry. By differential correction, the remaining 11 control points achieved 95% locational accuracy. This process eliminates 95% of the error introduced by the Department of Defense on the GPS system and distortion from the ionosphere. The 11.9m-contour was plotted on a LANDSAT-TM base image. The shoreline delineation for Mexico was not obtainable due to pending acquisition of digital elevation data for this region. To supplement this, a 10m contour was interpolated with the 11.9m contour used for the California side of Lake Cahuilla. The 11.9m-contour is consistent with the approximated shoreline elevation of Wilke and Waters.
Source_Used_Citation_Abbreviation: r:\salton\ssdp\gis\env\hydro\lk_cahuilla
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Buckles, Joseph E.
Contact_Organization: Redlands Institute, University of Redlands
Contact_Address:
Address_Type: mailing and physical address
Address: 1200 E. Colton Ave.
City: Redlands
State_or_Province: CA
Postal_Code: 92373
Country: USA
Contact_Voice_Telephone: 909-335-5268
Contact_Facsimile_Telephone: 909-307-6952
Process_Step:
Process_Description: Dataset copied.
Source_Used_Citation_Abbreviation: r:\salton\ssdp\gis\soc\cultres\lk_cahuilla
Process_Step:
Process_Description: Dataset copied.
Source_Used_Citation_Abbreviation:
Cloud_Cover: N/A
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: G-polygon
Point_and_Vector_Object_Count: 6
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Label point
Point_and_Vector_Object_Count: 0
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
Point_and_Vector_Object_Count: 6
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Point
Point_and_Vector_Object_Count: 4
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.000000
Longitude_Resolution: 0.000000
Geographic_Coordinate_Units: Decimal degrees
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: lk_cahuilla
Attribute:
Attribute_Label: FID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: AREA
Attribute:
Attribute_Label: PERIMETER
Attribute:
Attribute_Label: LK_CAHUILL
Attribute:
Attribute_Label: LK_CAHUI_1
Detailed_Description:
Entity_Type:
Entity_Type_Label: lk_cahuilla.pat
Attribute:
Attribute_Label: FID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: AREA
Attribute_Definition: Area of feature in internal units squared.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Positive real numbers that are automatically generated.
Attribute:
Attribute_Label: PERIMETER
Attribute_Definition: Perimeter of feature in internal units.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Positive real numbers that are automatically generated.
Attribute:
Attribute_Label: LK_CAHUILLA#
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: LK_CAHUILLA-ID
Attribute_Definition: User-defined feature number.
Attribute_Definition_Source: ESRI
Overview_Description:
Distribution_Information:
Resource_Description: Downloadable Data
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Transfer_Size: 0.851
Metadata_Reference_Information:
Metadata_Date: 20060911
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Redlands Institute, University of Redlands
Contact_Person: Lewis, Lisa
Contact_Address:
Address_Type: mailing and physical address
Address: 1200 E Colton
City: Redlands
State_or_Province: CA
Postal_Code: 92373
Country: USA
Contact_Voice_Telephone: 909-335-5268
Contact_Facsimile_Telephone: 909-307-6952
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Access_Constraints: None
Metadata_Use_Constraints: None
Metadata_Security_Information:
Metadata_Security_Classification_System: None
Metadata_Security_Classification: Unclassified
Metadata_Security_Handling_Description: None
Metadata_Extensions:
Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile
Generated by mp version 2.8.6 on Mon Sep 11 09:42:08 2006