COVERAGE CH67_95P

Available as - [Outline] - [SGML]

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: E&S Chemistry
Publication_Date: 19971027
Title: COVERAGE CH67_95P
Geospatial_Data_Presentation_Form: map
Publication_Information:
Publication_Place: Corvallis,OR
Publisher: E&S Chemistry
Online_Linkage: <http://www.orst.edu/dept/tbaynep/active.html>
Description:
Abstract:
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 1. The breach of Bayocean Spit between 1952 and 1956 2. Deforestation in the watershed 3. The Tillamook Burns of 1933, 1939, 1945, and 1951 4. 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.
Purpose:
The major objective of this project was to attempt to quantify changes in the depth of Tillamook Bay during the intervening periods between the bathymetric sampling dates.
Supplemental_Information:
Much of this documentation was extracted from "BATHYMETRIC ANALYSIS OF TILLAMOOK BAY Comparison Among Bathymetric Databases Collected in 1867, 1957 and 1995" by Joseph A. Bernert and Timothy J. Sullivan see Tillbath.doc for more detail.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19670000
Ending_Date: 19950000
Currentness_Reference: source data
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None Planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -123.95056682
East_Bounding_Coordinate: -123.87563601
North_Bounding_Coordinate: 45.57014315
South_Bounding_Coordinate: 45.4716968
Keywords:
Theme:
Theme_Keyword_Thesaurus: none
Theme_Keyword: Marine environments
Theme_Keyword: Environmental information
Theme_Keyword: Watershed management
Theme_Keyword: Soil erosion
Theme_Keyword: Water erosion
Theme_Keyword: wave erosion
Theme_Keyword: Sediment mobilization
Theme_Keyword: Sedimentary basins
Theme_Keyword: estuary
Theme_Keyword: bathymetry
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 comparison
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_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_Electronic_Mail_Address: unknown
Native_Data_Set_Environment:
Windows_NT, 4.0, Intel ARC/INFO version 7.2.1
Cross_Reference:
Citation_Information:
Originator: E&S Chemistry
Publication_Date: 19971027
Title: COVERAGE CH57_95P
Geospatial_Data_Presentation_Form: map
Publication_Information:
Publication_Place: Corvallis,OR
Publisher: E&S Chemistry

Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Measurement errors as documented in metadata for source coverages; in addition, there may exist a datum shift among the three bathymetric coverages. In other words, for each data set, the measured depths had to be standardized to some benchmark elevation. For example, a depth can be recorded at -3 ft., but we need to know the answer to the question, ?Three feet below what?? We do not have information on how the historical data sets were referenced, but we suspect that the reference points were probably not the same. Komar (1992) suggested that data on global sea level and local elevation changes indicated that, between 1931 and 1988, sea level has risen relative to the Tillamook area at a rate of 1 to 2 mm/yr. Assuming this rate has held since the first bathymetric survey, the rise in sea level in Tillamook Bay between 1867 and 1995 would be about 13 to 26 cm (0.4 to 0.8 ft). The official vertical datum shift of mean sea level was 4 ft between 1867 and 1957 and 3 ft between 1957 and 1995. Both of these vertical shifts in sea level were shifted upwards (Bruce Follansby, TBNEP, pers. comm.). The inferred changes from 1957 to 1995- many more areas were inferred to have become deeper than to have become shallower. No datum shift is assumed because we do not know what shift to apply to standardize these data sets.
Logical_Consistency_Report: Polygon topology present.
Completeness_Report: complete
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report: see source metadata
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report: see source metadata

Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: E&S Chemistry
Publication_Date: 19971000
Title: GRID BATHGRID67
Geospatial_Data_Presentation_Form: map
Publication_Information:
Publication_Place: Corvallis,OR
Publisher: E&S Chemistry
Type_of_Source_Media: ARC-INFO GRID
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 18670000
Source_Currentness_Reference: SOURCE DATA
Source_Citation_Abbreviation: a
Source_Contribution: all
Source_Information:
Source_Citation:
Citation_Information:
Originator: E&S Chemistry
Publication_Date: 19971000
Title: GRID BATHGRID95
Geospatial_Data_Presentation_Form: map
Publication_Information:
Publication_Place: Corvallis,OR
Publisher: E&S Chemistry
Type_of_Source_Media: ARC-INFO GRID
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 19950000
Source_Currentness_Reference: SOURCE DATA
Source_Citation_Abbreviation: b
Source_Contribution: all
Process_Step:
Process_Description:
grid interpolation usin BATHGRID57 and BATHGRID95,grid to polygon conversion
Process_Date: 19971000

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: 9221
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: String
Point_and_Vector_Object_Count: 21412
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
Point_and_Vector_Object_Count: 9222

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: 3.519000053405
Ordinate_Resolution: 3.519000053405
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: ch67_95p.PAT
Entity_Type_Definition: -poly attribute table
Entity_Type_Definition_Source: computer generated
Attribute:
Attribute_Label: GRID-CODE
Attribute_Definition:
'change in depth from 1957-1995, based on the difference in values of GRID BATHGRID_57 and GRID BATHGRID_95'
Attribute_Definition_Source: 'Sean Allen'
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: -9999-6-5-4-3-2-10123456
Enumerated_Domain_Value_Definition:
NODATAno changedeeper by 5-6 feetdeeper by 4-5 feetdeeper by 3-4 feetdeeper by 2-3 feetdeeper by 1-2 feetdeeper by 0-1 feetshallower by 0-1 feetdeeper by 1-2 feetdeeper by 2-3 feetdeeper by 3-4 feetdeeper by 4-5 feetshallower by 5-6 feet
Enumerated_Domain_Value_Definition_Source:
'standard code''A.M. Stark, Tillamook Bay National Estuary Project''A.M. Stark, Tillamook Bay National Estuary Project''A.M. Stark, Tillamook Bay National Estuary Project''A.M. Stark, Tillamook Bay National Estuary Project''A.M. Stark, Tillamook Bay National Estuary Project''A.M. Stark, Tillamook Bay National Estuary Project''A.M. Stark, Tillamook Bay National Estuary Project''A.M. Stark, Tillamook Bay National Estuary Project''A.M. Stark, Tillamook Bay National Estuary Project''A.M. Stark, Tillamook Bay National Estuary Project''A.M. Stark, Tillamook Bay National Estuary Project''A.M. Stark, Tillamook Bay National Estuary Project''A.M. Stark, Tillamook Bay National Estuary Project'
Overview_Description:
Entity_and_Attribute_Overview:

CH67_95P.PAT

COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC
    1  AREA                   4    12     F      3
    5  PERIMETER              4    12     F      3
    9  CH67_95P#              4     5     B      -
   13  CH67_95P-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_Electronic_Mail_Address: requests@tcwrc.tbcc.cc.or.us
Contact_Instructions: Contact via email,mail,fax or telephone
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: 19990113
Metadata_Future_Review_Date: 19990229
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 14:47:37 1999