Shoreline Delineation Challenges: An Automated Image Processing Approach, Salton Sea, California

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Kenneth C. Althiser
Publication_Date: July, 2000
Title:
Shoreline Delineation Challenges: An Automated Image Processing Approach, Salton Sea, California
Geospatial_Data_Presentation_Form: vector digital data
Online_Linkage:
http://www.institute.redlands.edu/salton/downloads/shapefiles/SS_Shoreline_227.zip
Description:
Abstract:
This dataset consists of a determination of the land-water interface at the Salton Sea, California. The interface was determined via a partially automated and partially manual process. In the automated phase of the interpolation process, DOQQ imagery was rendered into pixels in an ArcInfo GRID file. Using the GRID command, CELLVALUE, the user sampled the image to determine what values typify the land-water interface for a given area, and generate a polygon coverage by separating pixels with a value greater from those with a lesser value than that identified through CELLVALUE. The results were then compared to the images, and a final interpolation of linework was manually assembled in ArcEdit from the arcs considered acceptable.
Purpose:
A precise shoreline was required for wetlands and bathymetric mapping, whose elevation could be precisely known, since no other legitimate, cartographic baseline was available. The shoreline determination was accurate to approximately two meters, or the limitations of the imagery, which ranges from one or two meters in the center of the image to five to seven meters on the margins. Although the error increases on the margins, the imagery has 10-30% overlap on all edges, so the actual error is limited to approximately 5 meters.
Supplemental_Information:
This land-water interface was presented at both the ESRI User's Conference, and an American Water Resource Association conference.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: July 2000
Currentness_Reference: publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -116.085856
East_Bounding_Coordinate: -115.588541
North_Bounding_Coordinate: 33.534369
South_Bounding_Coordinate: 33.090317
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: shoreline
Theme_Keyword: image interpretation
Theme_Keyword: automated image interpretation
Theme_Keyword: land-water interface
Theme_Keyword: DOQQ
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: Geological and geophysical
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Salton Sea
Access_Constraints: None.
Use_Constraints: None.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Kenneth C. Althiser
Contact_Organization: Redlands Institute
Contact_Position: Senior GIS Analyst
Contact_Voice_Telephone: (909) 335-5268
Browse_Graphic:
Browse_Graphic_File_Name: None
Data_Set_Credit: Redlands Institute
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:
Title: None
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report: Data is considered to be 100% accurate.
Logical_Consistency_Report:
Polygon and chain-node topology is present. The data has been processed through standard ArcInfo and ArcEdit checks on arc and polygon topology, and verified through use of the CLEAN and later, BUILD commands.
Completeness_Report:
The data is complete and has no generalization. Another edition of the coverage was generated which is generalized to reduce disk space requirements for the coverage.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report: Estimated to be +/- 2 meters.
Lineage:
Process_Step:
Process_Description:
The interface was determined via a partially automated and partially manual process. In the automated phase of the interpolation process, DOQQ imagery was rendered into pixels in an ArcInfo GRID file. Using the GRID command, CELLVALUE, the user sampled the image to determine what values typify the land-water interface for a given area, and generate a polygon coverage by separating pixels with a value greater from those with a lesser value than that identified through CELLVALUE. The results were then compared to the images, and a final interpolation of linework was manually assembled in ArcEdit from the arcs considered acceptable.
Source_Used_Citation_Abbreviation: r:\salton\ssdp\gis\env\hydro\shoreline\ss_shore
Process_Step:
Process_Description: Dataset moved.
Source_Used_Citation_Abbreviation: R:\temp\SS\ss_shore_polygon
Process_Step:
Process_Description: Dataset copied.
Source_Used_Citation_Abbreviation:
Process_Step:
Process_Description: Dataset copied.
Source_Used_Citation_Abbreviation:
Server=ri-devcomp-1; Service=5151; Database=sde; User=sa; Version=sde.DEFAULT
Process_Step:
Process_Description: Dataset copied.
Source_Used_Citation_Abbreviation:
Server=ri-dbserv-2.institute.redlands.edu; Service=5151; Database=sde; User=sde; Version=sde.DEFAULT
Process_Step:
Process_Description: Dataset copied.
Source_Used_Citation_Abbreviation:
Server=ri-dbserv-2.institute.redlands.edu; Service=5181; Database=sde_temp; User=sde_admin; Version=sde.DEFAULT
Process_Step:
Process_Description: Dataset copied.
Source_Used_Citation_Abbreviation:
Server=ri-dbserv-2; Service=5151; Database=sde; User=sde_admin; Version=sde.DEFAULT
Process_Step:
Process_Description: Dataset copied.
Source_Used_Citation_Abbreviation:
Server=ri-dbserv-2.institute.redlands.edu; Service=5185; Database=sde_ssdp; User=sde_admin; Version=sde.DEFAULT
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: 612
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Label point
Point_and_Vector_Object_Count: 612
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
Point_and_Vector_Object_Count: 612
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
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Resolution: 1.000000
Altitude_Encoding_Method:
Explicit elevation coordinate included with horizontal coordinates
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: SS_Shoreline_227
Entity_Type_Definition: Arc Attribute Table
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: SQMILE
Attribute:
Attribute_Label: OBJECTID
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: LAKE
Attribute:
Attribute_Label: SHAPE
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
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: ACREAGE
Attribute:
Attribute_Label: SHAPE_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: SHAPE_len
Detailed_Description:
Entity_Type:
Entity_Type_Label: ss_shore.pat
Entity_Type_Definition: Polygon Attribute Table
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: SS_SHORE#
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: SS_SHORE-ID
Attribute_Definition: User-defined feature number.
Attribute_Definition_Source: ESRI
Attribute:
Attribute_Label: LAKE
Attribute_Definition: Indicates whether feature is in or out of the lake
Attribute:
Attribute_Label: ACREAGE
Attribute_Definition: Acreage of polygon calculated from area item
Attribute:
Attribute_Label: SQMILE
Attribute_Definition: Square Mileage of polygon calculated from the AREA field
Distribution_Information:
Resource_Description: Downloadable Data
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ARC
File_Decompression_Technique: No compression applied
Transfer_Size: 3.913
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: \\SALTON\ssdp\gis\env\hydro\shoreline\ss_shore
Access_Instructions: Local area network
Metadata_Reference_Information:
Metadata_Date: 20060906
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Redlands Institute
Contact_Person: Kenneth C. Althiser
Contact_Position: Senior GIS Analyst
Contact_Address:
Address_Type: mailing and physical address
Address: 1200 East Colton Avenue
Address: PO Box 3080
City: Redlands
State_or_Province: CA
Postal_Code: 92373
Country: United States of America
Contact_Voice_Telephone: (909) 335-5268
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 Wed Sep 06 15:57:52 2006