2009 eCityGov Alliance Natural Color Orthoimagery

Metadata also available as

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: eCityGov Alliance
Publication_Date: 201003
Title: 2009 eCityGov Alliance Natural Color Orthoimagery
Edition: One
Geospatial_Data_Presentation_Form: Raster image data
Publication_Information:
Publication_Place: King County; WA
Publisher: Aerials Express
Other_Citation_Details: None
Online_Linkage: None
Description:
Abstract:
Year 2009 (early Spring), leaf-off, natural color orthoimagery acquired by the eCityGov Alliance for partnering cities - Mercer Island, Bellevue, Kirkland, Bothell and Shoreline. Vendor was MJ Harden. Pixel resolution is 0.25 foot.
Purpose:
High-resolution, high-accuracy data for multiple business purposes.
Supplemental_Information: None
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 2009
Ending_Date: 2009
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -122.44
East_Bounding_Coordinate: -122.23
North_Bounding_Coordinate: 47.74
South_Bounding_Coordinate: 47.49
Keywords:
Theme:
Theme_Keyword_Thesaurus: Not applicable
Theme_Keyword: Orthophotography
Theme_Keyword: Orthoimagery
Theme_Keyword: Color infrared imagery
Place:
Place_Keyword_Thesaurus: Not applicable
Place_Keyword: King County; WA
Place_Keyword: Pacific NW
Place_Keyword: Washington state
Place_Keyword: United States
Access_Constraints:
As a licensee, King County is permitted to copy, analyze, print, and otherwise use the data at the licensee's sole discretion. Any use of the data in the production of printed maps or other graphic products shall credit the Licensor (eCityGov Alliance) as the source agency and copyright holder of the data in such products. The data may be distributed to all authorized users within the licensee's organization, but no distribution of the data is permitted to staff and/or programs of external organizations, except by prior agreement of Licensor.
Use_Constraints:
King County digital data may not be reproduced or redistributed in any form or by any means without the express written authorization of the King County Department of Natural Resources and Parks/KCGIS-Center.
Point_of_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
Native_Data_Set_Environment: Windows; ArcGIS; ArcView; ArcInfo
Browse_Graphic:
Browse_Graphic_File_Name:
<http://www5.kingcounty.gov/sdc/raster/ortho/images/Ortho2009eCityGovNATExtent.jpg>
Browse_Graphic_File_Description: Extent of project area
Browse_Graphic_File_Type: JPEG
Browse_Graphic:
Browse_Graphic_File_Name:
<http://www5.kingcounty.gov/sdc/raster/ortho/images/Ortho2009eCityGovNATSample.jpg>
Browse_Graphic_File_Description: Sample of imagery
Browse_Graphic_File_Type: JPEG
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
There are no attributes associated with these raster data formats.
Logical_Consistency_Report: None
Completeness_Report:
Not all 7500 foot tiles and Township-Range tiles along the edges of the project area are complete image tiles.
Lineage:
Process_Step:
Process_Description:
Data acquired from eCityGov Alliance in March 2010 via portable harddrive and DVD. Data was copied to workspace. Compressed MrSid versions (20x) were created for each tile for preliminary QA, horizontal accuracy analysis, and completion of extent shapefile. No spatial index was delivered with the data. A python routine was created to create a photo centroid layer. This point layer was buffered by 1600 feet to create a polygon footprint index. The photo center to edge is only 1500 feet, but the buffer was created larger than the image because the delivered tiles extent coincides in places with the King County 7500 grid. The overlap ensures that tile selection during subsequent processing does not miss an edge tile.
Process_Date: 201003
Process_Step:
Process_Description:
MrSid (v7) was used to create Generation 3 SID (lossless) mosaics in the King County 7500-ft tiling scheme. Another similar routine was used to create Generation 3 mosaics (15x compression) in the King County Township-Range tiling scheme.
Process_Date: 201002
Process_Step:
Process_Description:
Redefined Projection for all sids to be compliant with King County standard.
Process_Step:
Process_Description:
The database size was too large to mosaic as a single sid even at high compression. The data was resampled to 6 inch and a mosaic was also created for the affected Northwest Zone tile (35x compression) . A key region mosaic was created at 50x compression. Even though the key region mosaic covers that same area as the zone mosaic, it provides the complete dataset in a smaller file footprint.
Process_Date: 20100515
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
An analysis of 78 control points (70 known ground control and 9 'blind') showed a RMS (root mean square) accuracy of 0.39 feet in the X direction and 0.22 feet in the Y direction.
The full analysis can be viewed at: <http://www5.kingcounty.gov/sdc/raster/ortho/photo_control_master_09n025_RMSError.xls>
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Pixel
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: State Plane Coordinate System
State_Plane_Coordinate_System:
SPCS_Zone_Identifier: Washington North
Lambert_Conformal_Conic:
Standard_Parallel: 47.500000
Standard_Parallel: 48.733333
Longitude_of_Central_Meridian: -120.833333
Latitude_of_Projection_Origin: 47.000000
False_Easting: 1640416.666500
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: Row and column
Coordinate_Representation:
Abscissa_Resolution: 1
Ordinate_Resolution: 1
Planar_Distance_Units: Feet
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983; 1991 correction
Ellipsoid_Name: GRS 80
Semi-major_Axis: 20925604.4720406
Denominator_of_Flattening_Ratio: 298.26
Distribution_Information:
Distributor:
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
Resource_Description:
txxryy_09n025.sid
Also as 7500 tiles in TIF format, and zone and keyregion mosaics
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: 20100315
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: firstname.lastname@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 12:32:07 2013