Description: This file is a single ESRI raster catalog comprised of a collection of individual GeoTIFFs of the island of St. Thomas (USVI). An orthographic aerial image is remotely sensed image data in which displacement of features in the image caused by terrain relief and sensor orientation have been mathematically removed. Orthographic imagery combines the image characteristics of a photograph with the geometric qualities of a map. The source imagery was obtained from November 2010 through March 2012 and used to produce orthophotos with a 0.3 meter (approximately 1 foot) ground sample distance (GSD). The raw imagery was captured at 12-bit radiometric resolution and converted to 8-bit radiometry during post processing. The imagery was captured with approximately 60% forward overlap between adjacent exposures and 30% sidelap between all adjacent flight lines utilizing both a Microsoft UltraCAM X (2010-11 flights) and a Z/I Imaging DMC-II 230 (2012 flights) digital sensor. The orthographic imagery is available as 4-band (RGBI) GeoTIFF formatted digital images. The projected coordinate system is State Plane Puerto Rico / US Virgin Islands (Zone 5200), NAD 83, GRS 80, Units Meters.
Definition Expression: N/A
Copyright Text: U.S. Army Corps of Enginners, Jacksonville District, Geomatics Section