National Agricultural Imagery Program (NAIP) Digital Orthorectified Images (DOQ), Minnesota, 2008

This page last updated: 04/21/2014
Metadata created using Minnesota Geographic Metadata Guidelines


Go to Section:
1. Overview
2. Data Quality
3. Data Organization
4. Coordinate System
5. Attributes
6. Distribution - Get Data
7. Metadata Reference

Section 1 Overview
Originator U.S. Department of Agriculture (USDA), Farm Service Agency (FSA), Aerial Photography Field Office (APFO)
Title National Agricultural Imagery Program (NAIP) Digital Orthorectified Images (DOQ), Minnesota, 2008
Abstract This data set contains 4-band (natural color plus infrared) imagery from the National Agricultural 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.

The source files are 1 meter ground sample distance (GSD) ortho imagery rectified to a horizontal accuracy of within +/- 5 meters of reference digital ortho quarter quads (DOQQ's) from the National Digital Ortho Program (NDOP) or from NAIP. 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. JPEG2000 compression was used. Target values for the compression ratio are (15:1).

(Note: MnGeo has created this metadata record to describe the entire NAIP2008 dataset, using information from Farm Service Agency metadata. Each county file is accompanied by the original FSA metadata for that county.)
Purpose 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 1 meter 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. With an annual cycle, NAIP is also used for disaster response often providing the most current pre-event imagery.
Time Period of Content Date 2008
Currentness Reference May through September 2008. See the accompanying quarter-quad boundary shapefile for each county to find out the date(s) that the source imagery was acquired.
Progress Complete
Maintenance and Update Frequency Irregular
Spatial Extent of Data Minnesota
Bounding Coordinates -97.5
-89.00
49.5
43.0
Place Keywords Minnesota, MN
Theme Keywords imageryBaseMapsEarthCover, Digital Orthorectified Image, Digital Orthophoto Quad, Ortho, Orthophoto, DOQ, NAIP, Compliance, Air Photo, Air Photography, Aerial Photo, Aerial Photography
Theme Keyword Thesaurus ISO 19115 Topic Category
Access Constraints None
Use Constraints The Aerial Photography Field Office asks to be credited in derived products.

Imagery may be replaced to address defects found in a small number of products through quality assurance processes. Imagery containing defects that require the acquisition of new imagery, such as excessive cloud cover, specular reflectance, etc., will not be replaced within a NAIP project year.

MnGeo Redistribution conditions: In obtaining this data from MnGeo, it is understood that you and/or your organization have the right to use it for any purpose. If you modify it, you are encouraged to apply responsible best practices by documenting those changes in a metadata record. If you transmit or provide the data to another user, it is your responsibility to provide appropriate content, limitation, warranty and liability information as you see fit.
Contact Person Information Aerial Photography Field Office,
USDA-FSA
2222 West 2300 South
Salt Lake City, UT  84119-2020
Phone: 801-956-2922
Fax: 801-956-3653
Email: apfo.sales@slc.usda.gov
Browse Graphic Click to view a data sample
Associated Data Sets A shapefile, with its associated metadata, is included with this dataset. It shows polygons delineating the boundary between DOQQ imagery used in the creation of the county NAIP file and attributes such as the source date of the imagery.

For information on other air photos available for Minnesota, including other years of NAIP imagery, see www.mngeo.state.mn.us/chouse/airphoto/index.html

Section 2 Data Quality
Attribute Accuracy NAIP imagery may contain as much as 10% cloud cover per tile.
Logical Consistency N/A
Completeness No report.
Horizontal Positional Accuracy FSA Digital Orthophoto Specs. The quarter-quad files are 1 meter ground sample distance (GSD) ortho imagery rectified to a horizontal accuracy of within 5 meters of reference digital ortho quarter quads (DOQQ's) from the National Digital Ortho Program (NDOP) or from NAIP.
Vertical Positional Accuracy N/A
Lineage This Compressed County Mosaic was generated to JPEG 2000 (jp2) specifications using a target compression ratio of 15:1. All photography was acquired using digital mapping cameras and accompanied by the collection of airborne Global Positioning System (GPS) data. Orthorectification was performed with custom software and the USGS National Elevation Dataset was used for the elevation model. Digital orthophotos were radiometrically balanced in groups of 100-500 images using the Inpho OrthoVista product. Custom software automatically generated the jp2 project parameter file to control the insertion of the digital orthophotos in the final mosaic. The ordering scheme of the digital orthophotos is based on a last-in-last-on-top scheme.

Section 3 Spatial Data Organization (not used in this metadata)

Section 4 Coordinate System
Horizontal Coordinate Scheme Universal Transverse Mercator
UTM Zone Number 15
Horizontal Datum NAD83
Horizontal Units meters
Cell Width 1
Cell Height 1

Section 5 Attributes
Overview Imagery has 4 bands. Band 4 captures the near infrared.
Detailed Citation None
Table Detail:

Section 6 Distribution
Publisher Minnesota Geospatial Information Office (MnGeo)
Publication Date 09/2008
Contact Person Information Nancy Rader, GIS Data Coordinator
Minnesota Geospatial Information Office (MnGeo)
658 Cedar Street
St. Paul, MN  55155
Phone: 651-201-2489
Email: gisinfo.mngeo@state.mn.us
Distributor's Data Set Identifier NAIP 2008
Distribution Liability 1. FSA Liability Statement: In no event shall the creators, custodians, or distributors of this information be liable for any damages arising out of its use (or the inability to use it).

2. MnGeo's data disclaimer is online: www.mngeo.state.mn.us/chouse/disclaimer.html
Ordering Instructions The imagery is available free online by clicking below after Online Linkage. This link will take you to a webpage that contains direct links to:

1. View the files seamlessly via a WMS service without having to download the files. They are available as two separate layers: a natural color version and a color infrared version.

2. Download each county file in JPEG2000 format and accompanying quarter-quad shapefile. The files will be in either UTM zone 14 or 15, depending on which zone covers the majority of the county.
Online Linkage I AGREE to the notice in "Distribution Liability" above. Clicking to agree will either begin the download process or link to download information. See "Ordering Instructions" above for details.

Section 7 Metadata Reference
Metadata Date 04/21/2014
Contact Person Information Nancy Rader, GIS Data Coordinator
Minnesota Geospatial Information Office (MnGeo)
658 Cedar Street
St. Paul, MN  55155
Phone: 651-201-2489
Email: gisinfo.mngeo@state.mn.us
Metadata Standard Name Minnesota Geographic Metadata Guidelines
Metadata Standard Version 1.2
Metadata Standard Online Linkage http://www.mngeo.state.mn.us/committee/standards/mgmg/metadata.htm


This page last updated: 04/21/2014
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