Suzzallo Map Collection University of Washington Seattle, WA
<http://www.lib.washington.edu/Maps/>
HAP 80 series, US ASCS
"HAP80" series.
This image dataset was created from 6 individual photos (stored in TIFF format) which were orthorectified, mosaicked, and tiled into rectangular sections approximately 4900+ meters by 7000+ meters. (Sections are roughly the extents of slightly overlapping USGS Digital Ortho Quarter-quads found at <http://duff.ess.washington.edu/data/raster/doqs/>). Data does not necessarily fill each section completely.
Scale: 1:58,000
amX: 4.3170 amY: 3.7740 amZ: 6.3963
Average residual values for the X, Y, and Z control point coordinates from ERDAS Imagine OrthoBASE Triangulation Report (measured in meters):
aX: 0.5439 aY: 0.1148 aZ: -5.1634
Root mean square errors (standard deviation) of all X, Y, and Z from ERDAS Imagine OrthoBASE Triangulation Report (measured in meters):
mX: 4.9591 mY: 4.3330 mZ: 28.3419