2018 National Agriculture Imagery Program (NAIP)
Data Originator: US Department of Agriculture-Aerial Photography Field Office
Publication Date: 7/15/2018 - 10/23/2018
Image Coordinate System: Universal Transverse Mercator (UTM), Zone 13 or 14 North, meters, NAD83
Ground Resolution: 60cm ground sample distance
Registration By:
Funding Source: USDA - APFO
Description:
4 band original USDA NAIP imagery allowing natural color and Near (Color) Infrared (CIR) viewing. The National Agriculture Imagery Program (NAIP) acquires aerial imagery during the agricultural growing seasons in the continental U.S. A primary goal of the NAIP program is to make digital ortho photography available to governmental agencies and the public within a year of acquisition.
NAIP is administered by the USDA's Farm Service Agency (FSA) through the Aerial Photography Field Office in Salt Lake City. This "leaf-on" imagery is used as a base layer for GIS programs in FSA's County Service Centers, and is used to maintain the Common Land Unit (CLU) boundaries.
Specifications:
From the USDA-APFO NAIP website: NAIP imagery is acquired at a one-meter ground sample distance (GSD) with a horizontal accuracy that matches within six meters of photo-identifiable ground control points, which are used during image inspection.
The default spectral resolution is natural color (Red, Green and Blue, or RGB) but beginning in 2007, some states have been delivered with four bands of data: RGB and Near Infrared
Contractually, every attempt will be made to comply with the specification of no more than 10% cloud cover per quarter quad tile, weather conditions permitting.
All imagery is inspected for horizontal accuracy and tonal quality.
NAIP imagery products are available either as digital ortho quarter quad tiles (DOQQs) or as compressed county mosaics (CCM). Each individual image tile within the mosaic covers a 3.75 x 3.75 minute quarter quadrangle plus a 300 meter buffer on all four sides. The DOQQs are geotiffs, and the area corresponds to the USGS topographic quadrangles.
CCMs are generated by compressing digital ortho quarter quadrangle image tiles into a single mosaic. The mosaic may cover all or portions of an individual final product. All individual tile images and the resulting mosaic were rectified in the UTM coordinate system, NAD 83, and cast into a single predetermined UTM zone. CCMs from 2003 - 2007 are all in a .sid format. . Beginning in 2008, CCMs with four bands were compressed into a .jp2 format.
Beginning in 2009, all NAIP CCMs are delivered with a "seamline" shapefile showing which image swath made up each part of a given image
Since the NAIP program began in 2003, vendors have been transitioning to digital sensors in imagery acquisition. In 2009, most NAIP imagery will be acquired with digital sensors rather than film cameras.
This documentation, along with the map index, can be downloaded with the zip file below.
Metadata_NorthDakota_NAIP_2018_col.zip
For more information on the USDA's NAIP program, go to:https://www.fsa.usda.gov/programs-and-services/aerial-photography/imagery-programs/naip-imagery/