Content Description
Abstract: Orthophotos combine the image characteristics of a photograph with the geometric qualities of a map. This tile is provided as a digital ortho quarter-quarter-quadrangle (DOQQQ) 1-foot ground resolution, image cast on the State Plane South coordinate system on the North American Datum of 1983 (NAD83). The geographic extent of the DOQQQ is equivalent to a quarter-quarter-quadrangle plus the over edge ranges from a minimum of 50 meters to a maximum of 300 meters beyond the extremes of the primary and secondary corner points. The over edge is included to facilitate tonal matching for mosaicing and for the placement of the NAD83 and secondary datum corner ticks. The normal orientation of data is by lines (rows) and samples (columns). Each line contains a series of pixels ordered from west to east with the order of the lines from north to south. This series of DOQQQs was produced as a part of the Arkansas Digital Orthophotography Program headed by the Arkansas State Land Information Board and the Arkansas Geographic Information Office. The aerial photography used to create the digital images was flown between January 3, 2006 and January 25, 2006.
Purpose: This tile footprint layer can be used to identify the start and end dates that a particular DOQQ tiles was captured. This layer also contains a column containg the hyperlink to the ftp location of each tile.
Ortho photography serve a variety of purposes, from interim maps to field references for Earth science investigations and analysis. The ortho is useful as a layer of a geographic information system and as a tool for maps, collecting new features and feature classes using heads-up digitizing and maintenance of existing feature classes using visual evidence of changes in the on-the-ground conditions.
Supplemental Information: The 2006 digital orthos were captured with an ADS40 sensor. The City of Hot Springs, Arkansas purchased orthos in the RGB (natural color) band combination.
Content Status
Progress: Complete
Update Frequency: Irregular
Content Keywords
Theme Keywords: ISO 19115 Topic Category, imageryBaseMapsEarthcover, Arkansas Geographic Information Office, DOQ, DOQQ, Aerial, Ortho, Orthos, Photos, Photography, Aerial, Doq, Doqq, native
Place Keywords: United States, Arkansas, City of Hot Springs