1996 Digital Orthophotos of the Puget Sound Region

Metadata also available as

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: NIES Mapping Group
Publication_Date: 1996
Title: 1996 Digital Orthophotos of the Puget Sound Region
Edition: One
Geospatial_Data_Presentation_Form: Digital raster data
Publication_Information:
Publication_Place: Bellevue, WA
Publisher: Nies Mapping Group, Inc
Other_Citation_Details:
King County maintains a portion of the full project dataset covering King County and some adjacent areas in Snohomish and Pierce Counties. The full dataset includes Seattle, and its outlying areas. It is bounded to the east by and including North Bend; to the west by and including the Puget Sound coastline, to the north by and including Maryville; and finally to the south, by Tacoma.
Originator contract info: Nies Mapping Group, Inc 2310 130th Ave NE, Suite 100 Bellevue, WA 98005-1757 206-869-4020 (voice) 206-869-4095 (fax)
Online_Linkage: None
Description:
Abstract:
One-meter natural color orthophotography for the western, urbanized, portion of King County and portions of adjoining counties. The eastern boundary is defined by a line running north-south through the North Bend area.
Purpose: Archival orthophotos for the western King County area.
Supplemental_Information:
Original data was provided by the Originator in their tiling scheme. Data was retiled to standard tiling scheme for King County.
Data is available as TIFF and JPG2 compressed versions.
TIFF format data is available only at the base tiling level - idxp7500 - defined by a rectangular grid of cells with x-y dimensions of 7500 feet.
Primary user data is provided at second tier tiling level - idxptrmbr. This tiling level references the PLSS township-range grid with tiles buffered to a minimum-bounding rectangle of the township. Imagery at this level is provided only as compressed (compression ratio = 7, near lossless) imagery in JPG2000 format.
Imagery is also available as larger area mosaics at the idxpzone level (if appropriate) and as a highly compressed entire area of interest mosaic. Both the zone and entire area mosaic, called key region, is provided only as JP2 images.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 061996
Ending_Date: 071996
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -121.500000
East_Bounding_Coordinate: -121.100000
North_Bounding_Coordinate: +47.800000
South_Bounding_Coordinate: +47.100000
Description_of_Geographic_Extent:
Keywords:
Theme:
Theme_Keyword_Thesaurus: Not applicable
Theme_Keyword: Orthophotography
Theme_Keyword: Natural color orthoimagery
Theme_Keyword: Orthophotos
Place:
Place_Keyword_Thesaurus: Not applicable
Place_Keyword: King County, WA
Place_Keyword: Pacific NW
Place_Keyword: Washington state
Place_Keyword: Southwestern Snohomish County
Access_Constraints:
Imagery is available for internal use by King County. Other interested parties should contact the Originator directly.
Use_Constraints: None
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Mike Leathers
Contact_Organization: King County 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: Windows and Unix
Data_Quality_Information:
Lineage:
Process_Step:
Process_Description:
THE SOURCE PHOTOGRAPHY
The color aerial photography was taken with a Zeiss RMK/A 15/23 camera with forward motion compensation and mounted in a turbo / charged Cessna 206. It was flown in June and July 1996. The altitude of the aircraft, 15,000 feet above mean ground, provided photography at a nominal scale of 1:30000.
The film used was AGFA P200. From this film, diapositives were produced on Kodak Vericolor Print Film 4111 (ESTAR Thick Base) using an electronic auto-dodge contact printer with a color light source. Auto-dodging automatically compensates for changes in light conditions typically found between flight lines or within independent photo frames along a flight line. The quality and amount of information on these diapositives is far superior to that obtainable on paper prints. These diapositives were scanned as a part of the process in creating our digital orthophotos.
Process_Date: 1996
Process_Step:
Process_Description:
CONTROL
Control was a combination of new airborne and ground based GPS along with exitsing survey databases. The primary control in turn was densified into a secondary control network by photogrammetric and aerotriangulation methods.
DIGITAL ELEVATION DATA
The DEM data, which is a series of {x,y,z} points within the area, was provided by USGS from existing 1:24000 scale 7 1/2 minute quads. This data was provided so that the orthophotos could be rectified to meet the 1:20000 map scale accuracy.
ORTHOPHOTO RECTIFICATION
The diapositives were scanned and converted to digital images using a Zeiss/Intergraph PS-1 Linear Array scanner at a sample rate of 30 microns (846 dpi). The scanning produced a raw ground image pixel of nominally 0.9 meters in size. These digital images were oriented using the above mentioned control and rectified to remove distortions caused by variations in terrain elevation and perspective geometry. During the rectification process the image pixels were resampled using the cubic convolution algorithm to a one meter resolution. The final geo-referenced orthophotos have the same accuracy as a 1:20000 map. The reference system used for this project was the State Plane North Zone NAD 83 - 91.
Process_Date: 1996
Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Mike Leathers
Contact_Organization: King County 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
Resource_Description: 1996 Nies natural color orthophotography
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: 20031006
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Mike Leathers
Contact_Organization: King County 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
Contact_Electronic_Mail_Address: mike.leathers@kingcounty.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
City: Seattle
Country: US
City: Seattle
Country: US
City: Seattle
Country: US
Generated by mp version 2.9.6 on Wed Apr 10 12:31:42 2013