USGS Digital Raster Graphics (drg) - Various vintage

Metadata:

• Identification_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator:

United States Geological Survey (USGS) and University of WA Library

Publication_Date: Various

Title: USGS Digital Raster Graphics (drg) - Various vintage

Edition: One

Geospatial_Data_Presentation_Form: Raster Image

Publication_Information:

Publication_Place: King County, WA

Publisher: King County

Other_Citation_Details:

King County is responsible for the mosaiced and formatted raster images. The USGS is credited with the original interpretations and scanning.

Online_Linkage: None

Description:

Abstract:

USGS digital raster graphics (drg) are color image versions of the USGS topographical series maps. The vintage of the original input data varies considerably and has not been updated even if the USGS has updated the base data.

Two series

1. USGS 1:24,000 (7.5 minute) Topographic Maps of various recent vintage

There is no survey publication information available on the 1:24,000 series

2. USGS 1:125,000 (30 minute) historic Topographic Maps (vintage range 1890 to 1920).

Details on vintage of 1:125,000 historic series, based on information printed in borders of unmerged quadrangles:

The image mosaic is made up of 6 quads

Top row from left to right

Snohomish Surveyed 1983-95, published 1895

Sultan Surveyed 1919-21, published 1921

Skykomish Surveyed 1897 & 1902, published 1902

Bottom row left to right

Tacoma Surveyed 1894-95, published 1900

Cedar Lake Surveyed 1910-11, published 1913

Snoqualmie Pass Surveyed 1900-01, published 1901

Purpose:

General use for orientation to natural and manmade features and general elevation. Must be used with disgression due to changes in the real world that are not updated in the images.

Supplemental_Information:

Historic 1890-1920 version obtained by King County Dept of Natural Resources and Parks, Water and Lands Resource Division through University of Washington Library website during May, 2004. Originally obtained as six separate quadrangles. Stripping of borders, rectification and mosaicing performed May, 2004 by WLRD.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 1890

Ending_Date: 1970

Currentness_Reference: Publication date

Status:

Progress: Completed

Maintenance_and_Update_Frequency: None

Spatial_Domain:

Description_of_Geographic_Extent:

WRIA 8

Bounding_Coordinates:

West_Bounding_Coordinate: -121.500000

East_Bounding_Coordinate: -121.100000

North_Bounding_Coordinate: +47.800000

South_Bounding_Coordinate: +47.100000

Keywords:

Theme:

Theme_Keyword_Thesaurus: Not applicable

Theme_Keyword: Digital raster graphics

Theme_Keyword: USGS topographical maps

Theme_Keyword: 1:24,000 topo maps

Theme_Keyword: Place names

Place:

Place_Keyword_Thesaurus: Not applicable

Place_Keyword: King County, WA

Place_Keyword: Pacific NW

Place_Keyword: Washington state

Access_Constraints: None

Use_Constraints:

Users should be aware that the image mosaic is a compliation of multiple tiles that have seams different than the tiling scheme used by King County. The vintage of these tiles may vary considerably, thus information may change without crossing an image seam.

Egdematching errors (along original quad boundaries) are especially significant for historic version. This is probably the result of changing survey methods and changing geographic referencing standards over the 30 year span the topographic surveying was performed. Error is not consistent even within individual quads.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Mike Leathers

Contact_Organization: KC GIS Center

Contact_Position: GIS Data Coordinator

Contact_Address:

Address_Type: Mailing and physical address

Address: 201 S Jackson St

City: Seattle

State_or_Province: WA

Postal_Code: 98104

Country: USA

Contact_Voice_Telephone: 206-263-4867

Native_Data_Set_Environment: ArcInfo, ArcGIS, ArcView

Distribution_Information:

Distributor:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Mike Leathers

Contact_Organization: KCGIS Center

Contact_Position: GIS Data Coordinator

Contact_Address:

Address_Type: Mailing and physical address

Address: 201 S Jackson St

City: Seattle

State_or_Province: WA

Postal_Code: 98104

Country: USA

Contact_Voice_Telephone: 206-263-4867

Resource_Description: Not applicable

Distribution_Liability:

King County disclaims any warranty of use of any digital product or data beyond that for which it was designed.

Metadata_Reference_Information:

Metadata_Date: 20040514

Metadata_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Mike Leathers

Contact_Organization: KCGIS Center

Contact_Position: GIS Data Coordinator

Contact_Address:

Address_Type: Mailing and physical address

Address: 201 S Jackson St

City: Seattle

State_or_Province: WA

Postal_Code: 98104

Country: USA

Contact_Voice_Telephone: 206-263-4867

Contact_Electronic_Mail_Address: mike.leathers@metrokc.gov

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998