T-1557b; Sheet No. 4, Hood’s Canal, Dabop and Quilcene Bays, Washington Territory, 1883

Metadata:


Identification_Information:

Citation:

Citation_Information:

Originator:  Point No Point Treaty Council

Originator:  7999 NE Salish Lane, Kingston, WA 98346 USA

Publication_Date: 10/01/03

Title: T-1557b; Sheet No. 4, Hood’s Canal, Dabop and Quilcene Bays, Washington Territory, 1883

Geospatial_Data_Presentation_Form: map

Abstract:

Georeferenced United States Coast & Geodetic Survey Topographic Sheet T-1557b; Sheet No. 4, Hood’s Canal, Dabop and Quilcene Bays, Washington Territory, 1883; Scale: 1:10,000; Surveyor: J. J. Gilbert

Supplemental_Information:  For a comprehensive historical and technical review of the production and interpretation of early Coast & Geodetic Survey T-sheets please refer to Shalowitz, A.L. 1964. Shore and Sea Boundaries, Volumes 2.  U.S. Department of Commerce, U.S. Coast and Geodetic Survey, Washington, DC. This publication is available online at http://chartmaker.ncd.noaa.gov/hsd/shallow.htm

Time_Period_of_Content:  1883

Time_Period_Information:  1883

Single_Date/Time:

Calendar_Date: 1883

Currentness_Reference: 1883

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None planned

Keywords:

Theme:

Theme_Keyword: T-sheets

Theme_Keyword: Coastal Survey

Theme_Keyword: Land Cover

Theme_Keyword: Historical

Theme_Keyword: United States Coast and Geodetic Survey

Place:

Place_Keyword: Washington State

Place_Keyword: Puget Sound

Stratum:

Stratum_Keyword: Near Shore

Stratum_Keyword: Coast

Temporal:

Temporal_Keyword: 1883

Access_Constraints:

This georeferenced image may be freely downloaded and used. Please give credit to the Puget Sound River History Project, University of Washington.

http://riverhistory.ess.washington.edu

Use_Constraints:

This georeferenced image may be freely downloaded and used. Please give credit to the Puget Sound River History Project, University of Washington.

http://riverhistory.ess.washington.edu

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Alan Carter Mortimer

Contact_Organization:

Point No Point Treaty Council

Contact_Address:

Address_Type: mailing address

Address: 7999 NE Salish Lane

City: Kingston

State_or_Province: WA

Postal_Code: 98346

Country: USA

Contact_Voice_Telephone: (360) 297-6530

Contact_Facsimile_Telephone: (360) 297-3413

Contact_Electronic_Mail_Address: alancm@pnptc.org

 


Data_Quality_Information:

Positional_Accuracy:

Horizontal_Positional_Accuracy: 3 meters (using ten reliable benchmarks)

 

Both shorelines show a little varience as compared visually with DRG's, however there is no consistent shift. It is assumed that this is due to original survey, cartographic, or drafting error, and not due to the georeferencing process.

 

To assess an independent check of the accuracy of the registration process, benchmarks located on the T-sheets were compared to published NGS benchmarks that were retraceable to the time of the surveyed T-sheet. (Published NGS benchmark information is located at http://www.ngs.noaa.gov/cgi-bin/datasheet.prl). Only benchmarks that could be established with a high degree of certainty that existed at the time of the original T-sheet survey and were not remounted were used in the final accuracy measurement. If no current benchmarks exist or if the benchmarks have been remounted in relation to the benchmarks on the T-sheet, hard points (areas that would expect little change since the original surveys) were used to give a general indicator of the T-sheet’s registration accuracy in lieu of a more rigorous method. Thus these hard point measurements must be viewed with some caution. It should be stressed that the accuracy assessment was to check the accuracy of the overall registration process, not necessarily the accuracy of the survey itself.

 

NOTE: Measured distances are rounded to the nearest meter. The hand-drawn representations of benchmarks on the T-sheets are often up to 10 meters in width. To assess an independent check of the accuracy of the registration process, the measured distance is from the NGS-published coordinates to the perceived middle of the benchmark depicted on the T-sheet. In addition, the overall shape of the benchmark symbol is sometimes obscured by other symbology on the T-sheet. Thus, there is a certain level of uncertainty introduced due to the ambiguous location of the benchmark on the T-sheet. 

 

Horizontal_Positional_Accuracy_Report:

            The following ten benchmarks were used for the error assessment, and gave an average error of 2.5 meters.

 

Station Name

PID

Latitude

Longitude

LAKE 1878

SY5551

47 45 41.66398

122 51 03.08048

QUILCENE 1878

SY5545

47 46 47.06490

122 51 56.61196

BEND 1878

SY5546

47 48 09.01025

122 52 03.55817

CEDAR 1878

SY5555

47 47 44.99308

122 50 58.41620

FISHERY 1878

SY5552

47 46 54.97113

122 51 12.05287

PENINSULA 1878

SY5548

47 46 46.77710

122 50 47.21249

TULE 1878

SY5559

47 47 21.22014

122 49 23.97360

BROAD SPIT 1878

SY5562

47 48 37.22951

122 48 57.66821

TONGUE 1878

SY5539

47 46 23.80321

122 47 45.77667

TABOOK 1878

SY5480

47 44 48.76303

122 48 34.84904

 

 

Lineage:

Technician: Alan Carter Mortimer  Date:  10-30-03

Process_Step:

Process_Description:  The georeferencing of T-sheets in the Puget Sound region was funded by the Puget Sound Nearshore Project (PSNERP) http://www.pugetsoundnearshore.org/

Scanned images were obtained from Information Manufacturing Corporation, 7000 Infantry Ridge Road, Suite 200, Manassas, VA 20109 Phone: (703) 393-6866

 

T-Sheets in the Hood Canal and Strait of Juan de Fuca vicinity were processed by Point No Point Treaty Council (http://www.pnptc.org/) for this project.

 

The methodology used to georeference the T-sheets was modified from the previous work of Jennifer Burke (NOAA) in the Lower Columbia and Daniels et al (2001). The georeferencing and error assessment process were carried out using ArcGIS 8.3. For additional information concerning the georeferencing method please refer to: http://rocky2.ess.washington.edu/riverhistory/tsheets.php

 

Datum Shift:

 

Most T-sheets do not have a current datum represented on them (i.e. NAD 27, NAD 83). Graticules (tics) marking Latitude and Longitude in the early local Puget Sound Datum (PSD) and a later update to North American Datum (NAD) projection are most often present. To calculate the X, Y shift from NAD to NAD 27, X and Y values were used from datum difference tables for survey stations around most of Puget Sound (Patton, 1999). An overall datum shift was determined for the area covered by the T-sheet by averaging the shift from a number of survey stations in or nearby that area represented on the T-sheet.

 

The following survey stations were used to calculate the datum shift:

 

BEND 1878

BROAD SPIT 1878

CEDAR 1878

FISHERY 1878

GRASS 1878

LAKE 1878

PENINSULA 1878

QUILCENE 1878

TONGUE 1878

TULE 1878

TABOOK 1878

 

 

            Registration:

 

For georeferencing, tics were used only surrounding areas that depicted nearshore features on the T-sheet. This was mainly done to hasten the overall process due to the magnitude of the scope of the project while maintaining the best control around areas of interest. The sheets were then rectified using a 1st order polynomial transformation. Points that produced relatively high RMS values, as well as tic points that consistently fell outside of 4.5 meters (on a 1:10,000 scale T-sheet) of their projected UTM coordinates were omitted.

 

            The following tic marks were used for georeferencing the initial resample:

 

ID

Latitude

 

Longitude

 

1

47

45

122

47

2

47

45

122

48

3

47

45

122

49

4

47

45

122

50

5

47

45

122

51

6

47

45

122

52

7

47

46

122

47

8

47

46

122

48

9

47

46

122

49

10

47

46

122

50

11

47

46

122

51

12

47

46

122

52

13

47

47

122

47

14

47

47

122

48

15

47

47

122

49

16

47

47

122

50

17

47

47

122

51

18

47

47

122

52

19

47

47

122

53

20

47

48

122

47

21

47

48

122

48

22

47

48

122

49

23

47

48

122

50

24

47

48

122

51

25

47

48

122

52

26

47

48

122

53

 

            Two resamples were performed, and the first resample was used with all 26 points, an RMS of 2.03606, and lower benchmark error.

 

 

Several factors that can introduce error into the registration process include:

 

 

 

 

 

 

 

 

References:

 

 Daniels, R. C. and R.H. Huxford. 2001. An error assessment of vector data derived from scanned National Ocean Service topographic sheets. Journal of Coastal Research 17: 611 – 619.

 

Patton, R.S., 1999. Datum Differences: Atlantic, Gulf, and Pacific Coast of the United States. U.S. Department of Commerce, U.S. Coast and Geodetic Survey, Washington D.C. (Original publication: 1936)

 

 


Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: Universal Transverse Mercator

Universal_Transverse_Mercator:

UTM_Zone_Number: 10

Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.999600

Longitude_of_Central_Meridian: -123.000000

Latitude_of_Projection_Origin: 0.000000

False_Easting: 500000.000000

False_Northing: 0.000000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: row and column

Coordinate_Representation:

Abscissa_Resolution: 2.000000

Ordinate_Resolution: 2.000000

Planar_Distance_Units: meters

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1927

Ellipsoid_Name: Clarke 1866

Semi-major_Axis: 6378206.400000

Denominator_of_Flattening_Ratio: 294.978698


Distribution_Information:

Resource_Description: Downloadable Data

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:


Metadata_Reference_Information:

Metadata_Date: 20020723

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Brian Collins, Amir Sheikh

Contact_Organization:

Department of Earth and Space Sciences, University of Washington

Contact_Address:

Address_Type: mailing address

Address: Department of Earth and Space Sciences

Address: Box 351310

Address: University of Washington

City: Seattle

State_or_Province: WA

Postal_Code: 98195

Country: USA

Contact_Voice_Telephone: (206) 616-6584

Contact_Facsimile_Telephone: (206) 543-0489

Contact_Electronic_Mail_Address: bcollins@u.washington.edu

Contact_Electronic_Mail_Address: asheikh@u.washington.edu

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time