COVERAGE BATHPOLY57

Available as - [Outline] - [SGML]

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: E&S Chemistry
Publication_Date: 19971000
Title: COVERAGE BATHPOLY57
Edition:
Geospatial_Data_Presentation_Form: map
Series_Information:
Series_Name:
Issue_Identification:
Publication_Information:
Publication_Place: Corvallis,OR
Publisher: E&S Chemistry
Online_Linkage: <http://www.orst.edu/dept/tbaynep/active.html>

Description:
Abstract:
Bathymetric surface grid derived from bathpt57. Several studies of sedimentation and sediment composition have been conducted in Tillamook Bay (e.g., Avolio 1973, Glenn 1978, Komar 1997). The latter report provides an overview of what is known about sedimentation of the bay, which is an important environmental concern because of its influence on habitat quality and navigation. Bathymetric surveys were conducted in 1867, 1957, and 1994/1995. E&S performed a comparative analysis for TBNEP of the available historical bathymetric data sets for the bay. The objective of this analysis was to quantify, to the extent possible, the changes in bathymetry that occurred between the times of the available surveys. It is considered likely that the bay has received excessive contributions of ? the breach of Bayocean Spit between 1952 and 1956 ? deforestation in the watershed ? the Tillamook Burns of 1933, 1939, 1945, and 1951 ? land use practices in the watershed, including road construction, agriculture, and urbanization The greatest impacts of these sources of sedimentation probably occurred prior to the 1957 bathymetric survey. In addition, the bay has been altered in a variety of other ways that have undoubtedly affected its bathymetry. These include the drainage of wetlands and construction of dikes and levees. The inlet from the ocean was modified by constructing jetties, and dredging of navigation channels has occurred throughout this century (Percy et al. 1974). The most catastrophic change occurred in 1952 when the spit was breached just north of the current location of Cape Meares Lake. This may have been due to erosion of Bayocean spit in response to construction of the north jetty. The breach remained open until a dike was constructed in 1956 to close it off.

Purpose:
We developed bathymetric maps for each of the data sets in a consistent fashion. This allowed direct comparison between surveys to permit quantification of the changes that occurred in the depth of the bay during the intervening periods. Several studies of sedimentation and sediment composition have been conducted in Tillamook Bay (e.g., Avolio 1973, Glenn 1978, Komar 1997). The latter report provides an overview of what is known about sedimentation of the bay, which is an important environmental concern because of its influence on habitat quality and navigation. Bathymetric surveys were conducted in 1867, 1957, and 1994/1995. E&S performed a comparative analysis for TBNEP of the available historical bathymetric data sets for the bay. The objective of this analysis was to quantify, to the extent possible, the changes in bathymetry that occurred between the times of the available surveys. FOR MORE DETAILED INFORMATION SEE TILLBATH.TXT
Supplemental_Information:
FOR MORE DETAILED INFORMATION SEE TILLBATH.TXT

Supplemental_Information:

Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 19570000
Currentness_Reference: publication date

Status:
Progress: Complete
Maintenance_and_Update_Frequency: None Planned

Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -123.94998188
East_Bounding_Coordinate: -123.87592572
North_Bounding_Coordinate: 45.57012479
South_Bounding_Coordinate: 45.46866775

Keywords:
Theme:
Theme_Keyword_Thesaurus: none
Theme_Keyword: Transportation
Theme_Keyword: Environmental monitoring
Theme_Keyword: Watershed management
Theme_Keyword: Sedimentation
Theme_Keyword: Freshwater ecosystems
Theme_Keyword: Sediment transport
Theme_Keyword: Surface waters
Place:
Place_Keyword_Thesaurus: none
Place_Keyword: North America
Place_Keyword: United States of America
Place_Keyword: OR
Place_Keyword: Oregon
Place_Keyword: Tillamook Bay
Temporal:
Temporal_Keyword_Thesaurus: None
Temporal_Keyword: historical
Temporal_Keyword:
1957

Access_Constraints: none

Use_Constraints: see Distribution_Liability

Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Joe Bernert or Tim Sullivan
Contact_Organization: E&S Chemistry
Contact_Position:
Contact_Address:
Address_Type: Mailing and Physical Address
Address: P.O. Box 609
City: Corvallis
State_or_Province: OR
Postal_Code: 97339
Country: USA
Contact_Voice_Telephone: (541) 758-6305
Contact_Facsimile_Telephone:
Contact_Electronic_Mail_Address: unknown

Data_Set_Credit:

Native_Data_Set_Environment:
Windows_NT, 4.0, Intel ARC/INFO version 7.2.1

Cross_Reference:
Citation_Information:
Originator:
Publication_Date: 19971000
Title: COVERAGE BATHPOLY95
Geospatial_Data_Presentation_Form: ARCINFO COVERAGE
Series_Information:
Series_Name:
Issue_Identification:
Publication_Information:
Publication_Place: Portland, OR
Publisher: E&S Chemistry
Online_Linkage:


Data_Quality_Information:
Logical_Consistency_Report: Not applicable for raster data.
Completeness_Report: complete
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
The variance associated with the 1957 bathymetric surface illustrates the unfortunate nature of this survey. The spacing of data points along the horizontal survey transects was much less than the spacing between transects. Thus, the variance is low in strips across the bay that lie about each of the transects The variance between transects is high (> 10 ft). The range (r) of the semivariogram for 1867 was 584 m, as compared with 271 m in 1957 and 481 m in 1995 .Other potential sources of error in the bathymetric maps include
1.positional accuracy of the collected data,
2.depth measurements,
3.data entry and processing,
4.changing scale between and within data sets,
and
5.the density and spatial configuration of the
data points (Burroughs 1986).
(see metadata for bathpt67)
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
The range (r) of the semivariogram for 1867 was 584 m, as compared with 271 m in 1957 and 481 m in 1995 .Other potential sources of error in the bathymetric maps include
1.positional accuracy of the collected data,
2.depth measurements,
3.data entry and processing,
4.changing scale between and within data sets,
and
5.the density and spatial configuration of the
data points (Burroughs 1986).
(see metadata for bathpt57)
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: Interrain Pacific
Publication_Date: 19950000
Title: COVERAGE BATHGRID57
Publication_Information:
Publication_Place: Portland,OR
Publisher: Interrain Pacific
Type_of_Source_Media: computer program
Source_Citation_Abbreviation: a
Source_Contribution: all
Process_Step:
Process_Description:
Converted from source a above using ARCINFO FOR MORE DETAILED INFORMATION SEE TILLBATH.TXT
Process_Date:
19971200


Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Point
Point_and_Vector_Object_Count: 1693
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: String
Point_and_Vector_Object_Count: 2981
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
Point_and_Vector_Object_Count: 1694


Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: Lambert Conformal Conic
Lambert_Conformal_Conic:
Standard_Parallel: 43
Standard_Parallel: 45.5
Longitude_of_Central_Meridian: -120.5
Latitude_of_Projection_Origin: 41.75
False_Easting: 400000.00000
False_Northing: 0.00000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 3.63000011444
Ordinate_Resolution: 3.63000011444
Planar_Distance_Units: 3.2808400000
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: GRS1980
Semi-major_Axis: 6378206.4
Denominator_of_Flattening_Ratio: 294.98


Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: bathpoly57.PAT
Entity_Type_Definition: -poly attribute table
Entity_Type_Definition_Source: computer generated

Attribute:
Attribute_Label: GRID-CODE
Attribute_Definition: self-explanatory
Attribute_Definition_Source: n/a
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: 1
Enumerated_Domain_Value_Definition: OVER 1 FOOT
Enumerated_Domain_Value_Definition_Source: 'Ann Stark, Tillamook Coastal Watershed Resource Center'
Enumerated_Domain:
Enumerated_Domain_Value: 2
Enumerated_Domain_Value_Definition: 1 TO -1 FEET
Enumerated_Domain_Value_Definition_Source: 'Ann Stark, Tillamook Coastal Watershed Resource Center'
Enumerated_Domain:
Enumerated_Domain_Value: 3
Enumerated_Domain_Value_Definition: -1 TO -3 FEET
Enumerated_Domain_Value_Definition_Source: 'Ann Stark, Tillamook Coastal Watershed Resource Center'
Enumerated_Domain:
Enumerated_Domain_Value: 4
Enumerated_Domain_Value_Definition: -3 TO -6 FEET
Enumerated_Domain_Value_Definition_Source: 'Ann Stark, Tillamook Coastal Watershed Resource Center'
Enumerated_Domain:
Enumerated_Domain_Value: 5
Enumerated_Domain_Value_Definition: -6 TO -12 FEET
Enumerated_Domain_Value_Definition_Source: 'Ann Stark, Tillamook Coastal Watershed Resource Center'
Enumerated_Domain:
Enumerated_Domain_Value: 6
Enumerated_Domain_Value_Definition: -12 to -24 feet
Enumerated_Domain_Value_Definition_Source: 'Ann Stark, Tillamook Coastal Watershed Resource Center'
Enumerated_Domain:
Enumerated_Domain_Value: 7
Enumerated_Domain_Value_Definition: over 24 feet deep
Enumerated_Domain_Value_Definition_Source: 'Ann Stark, Tillamook Coastal Watershed Resource Center'
Overview_Description:
Entity_and_Attribute_Overview:

BATHPOLY57.PAT

COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC
    1  AREA                   4    12     F      3
    5  PERIMETER              4    12     F      3
    9  BATHPOLY57#            4     5     B      -
   13  BATHPOLY57-ID          4     5     B      -
   17  GRID-CODE              4     8     B      -


Entity_and_Attribute_Detail_Citation: not available


Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Tillamook Coastal Watershed Resource Center
Contact_Position: G.I.S. Coordinator
Contact_Address:
Address_Type: mailing and physical address
Address: 6385 Tillamook Ave.
City: Bay City
State_or_Province: OR
Postal_Code: 97107
Country: USA
Contact_Voice_Telephone: (503)377-4000
Contact_Instructions: Contact via email,mail,fax or telephone
Contact_Electronic_Mail_Address: requests@tcwrc.tbcc.cc.or.us

Distribution_Liability:
no warranty expressed or implied is made regarding the accuracy or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data and aggregate use with other data. It is also strongly recommended that careful attention be paid to the contents of the metadata file associated with these data. The Tillamook Coastal Watershed Resource Center shall not be held liable for improper or incorrect use of the data described and/or contained herein.

Metadata_Reference_Information:
Metadata_Date: 19981215
Metadata_Review_Date:
Metadata_Future_Review_Date:
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Tillamook Coastal Watershed Resource Center
Contact_Person: Ann Stark
Contact_Position: GIS Coordinator
Contact_Address:
Address_Type: mailing and physical address
Address: 6385 Tillamook Ave.
City: Bay City
State_or_Province: OR
Postal_Code: 97107
Country: USA
Contact_Voice_Telephone: (503)377-4000
Contact_Facsimile_Telephone: (503)377-4010
Contact_Electronic_Mail_Address: requests@tcwrc.tbcc.cc.or.us
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Access_Constraints: none
Metadata_Use_Constraints: none

Generated by mp version 2.4.10 on Wed Jul 28 14:41:59 1999