Monday, December 7, 2009

VBMP 2009 Imagery Delivered

The Virginia Geographic Information Network (VGIN) has completed delivery of new imagery to 87 jurisdictions in eastern Virginia (see map) from its 2009-2012 Virginia Base Map Program Orthophotography Program. The imagery was acquired from January to April 2009 and has several new features.

This is the first time VBMP has used digital cameras, the Z/I Digital Mapping Camera (DMC), and the first time the imagery has come with a fourth near-infrared spectral band. The imagery is provided in Virginia state plane coordinates using the improved accuracy of the North American 1983 HARN datum. (The HARN datum typically differ about 1 foot, and up to 3 feet, from the North American 1983 Datum.) The standard resolution is 1-foot pixels, except where jurisdictions ordered upgrades of 3-inch or 6-inch resolution. The deliveries included uncompressed GeoTIFF and compressed JPEG2000 image formats, both of which can accommodate the fourth band. VGIN is providing 3-band MrSID compressed images to jurisdictions upon request. More information on the 2009-2012 Orthophotography Program can be found on the VGIN website.

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