Alliance, eCityGov, 201003, 2009 eCityGov Alliance Natural Color Orthoimagery: Aerials Express, King County; WA.
This is a Raster data set. It contains the following raster data types:
Planar coordinates are encoded using Row and column
Abscissae (x-coordinates) are specified to the nearest 1
Ordinates (y-coordinates) are specified to the nearest 1
Planar coordinates are specified in Feet
The horizontal datum used is North American Datum of 1983; 1991 correction.
The ellipsoid used is GRS 80.
The semi-major axis of the ellipsoid used is 20925604.4720406.
The flattening of the ellipsoid used is 1/298.26.
High-resolution, high-accuracy data for multiple business purposes.
There are no attributes associated with these raster data formats.
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>
Not all 7500 foot tiles and Township-Range tiles along the edges of the project area are complete image tiles.
Are there legal restrictions on access or use of the data?
- 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.
- 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.
txxryy_09n025.sid Also as 7500 tiles in TIF format, and zone and keyregion mosaics
King County disclaims any warranty of use of any digital product or data beyond that for which it was designed.