National Agriculture Imagery Program (NAIP) - 2004 OrthoImagery
UTM NAD83 Projection
This data set contains imagery from the National Agriculture
Imagery Program (NAIP). NAIP acquires digital ortho imagery
during the agricultural growing seasons in the continental U.S..
A primary goal of the NAIP program is to enable availability of
ortho imagery within one year of acquisition. NAIP provides two
main products: 1 meter ground sample distance (GSD) ortho
imagery rectified to a horizontal accuracy of within 3
meters of reference digital ortho quarter quads (DOQQ's) from
the National Digital Ortho Program (NDOP); and, 2 meter GSD
ortho imagery rectified to within 10 meters of reference
DOQQs. The tiling format of NAIP imagery is based on a 3.75'
x 3.75' quarter quadrangle with a 300 meter buffer on all four
sides. NAIP quarter quads are formatted to the UTM coordinate
system using NAD83. NAIP imagery may contain as much as 10%
cloud cover per tile.
This file was generated by compressing NAIP quarter quadrangle
tiles that cover a county. MrSID compression, with mosaic
option, was used. Target values for the compression ratio
are (50:1) and compression levels(9) are used.
NAIP imagery may be distributed on an interim basis to meet
USDA program requirements. The interim product is a
compressed county mosaic. Users should be aware that the
interim compressed county mosaic may contain defects and
have horizontal accuracy less than the specified tolerances.
Defective imagery may be replaced within one year of image