naip_1-1_1n_s_ca023_2009_1.sid

Raster Dataset - MrSID

Description Spatial Attributes



Keywords
Theme: farming, Digital Ortho rectified Image, Mosaic, Quarter Quadrangle Centered, Ortho Rectification, Compression, MrSID, JPEG 2000, NAIP, Compliance, Aerial Compliance
Place: CA, Humboldt, Humboldt CO CA FSA, 06023

Description
Abstract
This data set contains imagery from the National
Agriculture Imagery Program (NAIP).  The 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.  The NAIP provides two main products: 1
meter ground sample distance (GSD) ortho imagery
rectified to a horizontal accuracy within +/- 5 meters
of reference digital ortho quarter quads (DOQQ's) from
the National Digital Ortho Program (NDOP) or from the
National Agriculture Imagery Program (NAIP); 1 meter
GSD ortho imagery rectified within +/- 6 meters to
true ground.  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.  The NAIP imagery is
formatted to the UTM coordinate system using the North
American Datum of 1983 (NAD83).  The NAIP imagery may
contain as much as 10% cloud cover per tile.  This file
was generated by compressing NAIP imagery that cover
the county extent.  Two types of compression may be
used for NAIP imagery: MrSID and JPEG 2000. Target
value for the compression ratio is (15:1).

Purpose
The NAIP imagery is available for distribution within
60 days of the end of a flying season and is intended
to provide current information of agricultural conditions
in support of USDA farm programs. For USDA Farm Service
Agency, the 1 meter GSD product provides an ortho image
base for Common Land Unit boundaries and other data sets.
The NAIP imagery is generally acquired in projects
covering full states in cooperation with state
government and other federal agencies who use the
imagery for a variety of purposes including land use
planning and natural resource assessment.  The NAIP is
also used for disaster response often providing the most
current pre-event imagery.

Links to graphics describing the data
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Status of the data

Time period for which the data is relevant

Publication Information
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Data storage and access information

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