National Agricultural Imagery Program (NAIP) Digital Orthorectified Images (DOQ), Minnesota, 2002

This page last updated: 05/16/2018
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. Dept. of Agriculture, Farm Services Agency, Aerial Photography Field Office and the U.S. Army Corps of Engineers - St. Paul District
Title National Agricultural Imagery Program (NAIP) Digital Orthorectified Images (DOQ), Minnesota, 2002
Abstract This data set of 28 agricultural counties in southern Minnesota contains photographic information obtained for the National Agricultural Imagery Program (NAIP) and is comprised of scanned photographs that were acquired with a precision aerial mapping camera at a nominal scale of 1:40,000 on color positive film. Acquisition was leaf-on with mature crops prior to harvest. Images have been orthorectified. NAIP imagery is quarter-quadrangle centered to provide consistent and repeatable coverage.

The original imagery is in GeoTIFF format. A MrSID version is also available, developed by the U.S. Army Corps of Engineers - St. Paul District for the USDA - Farm Services Agency. This version has one or several MrSID files per county and was created by mosaicking the quarter-quads together.
Purpose NAIP imagery serves as a base for Farm Service Center GIS applications and is used to administer USDA commodity support programs and conservation planning. The MrSID mosaics were compiled to provide a data format that is highly compressed (20:1) with minimal data loss.
Time Period of Content Date 2002
Currentness Reference June 2002 through August 2002. Each quarter-quadrangle image filename includes the date on which the photo was taken. The metadata records that accompany each MrSID county mosaic file contain a range of dates for that county.
Progress Complete
Maintenance and Update Frequency Irregular
Spatial Extent of Data 28 counties in southern Minnesota (note: the metadata records accompanying each MrSID county mosaic file contain the bounding box coordinates for that file).
Bounding Coordinates -96.5
-91.1
45.0
43.4
Place Keywords Blue Earth County, Brown County, Cottonwood County, Dakota County, Dodge County, Faribault County, Fillmore County, Freeborn County, Goodhue County, Houston County, Jackson County, Le Sueur County, Lyon County, Martin County, Mower County, Murray County, Nicollet County, Nobles County, Olmsted County, Pipestone County, Redwood County, Rice County, Rock County, Steele County, Wabasha County, Waseca County, Watonwan County, Winona County
Theme Keywords imageryBaseMapsEarthCover, Digital Orthorectified Image, Digital Orthophoto Quad, Ortho, Orthophoto, DOQ, NAIP, Compliance, Air Photo, 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. Credit should also be given to the U.S. Army Corps of Engineers - St. Paul District for creating the MrSID versions.

MnGeo's 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 Keith LeClaire, Cartographer
U.S. Army Corps of Engineers - St. Paul District Office
190 5th Street East
St. Paul, MN  55101-1638
Phone: 651-290-5491
Email: keith.r.leclaire@usace.army.mil
Browse Graphic Click to view a data sample.
Small portion of the Pickwick SW quarter-quad (in Winona County) sample image in JPG format; see Ordering Instructions to download the entire sample quarter-quad image in TIF format.
Associated Data Sets For information on other air photos available for Minnesota, see http://www.mngeo.state.mn.us/chouse/airphoto/index.html

Section 2 Data Quality
Attribute Accuracy
Logical Consistency None
Completeness None
Horizontal Positional Accuracy The positional accuracy for the digital data is tested by visual comparison to a data source with a higher order of accuracy. See Lineage for details.
Vertical Positional Accuracy N/A
Lineage Steps to produce the original NAIP 2002 imagery (Farm Services Agency):

The 1:40,000 color aerial photography film was used to produce a 1-meter ground sample distance image. The scanned images were ortho (differentially) rectified using U.S. Geological Survey 30-meter DEMs (digital elevation models), aero-triangulation and control from airborne GPS supplemented with photo-identifiable points from 1991-2 USGS digital orthophoto quads (DOQs) that had been mosaicked and compressed by USDA FSA. Horizontal accuracy specifications required that 90% of well defined test points on the ortho-rectified image match within 3 meters the same points on the mosaicked DOQs.


Steps to produce the MrSID files (U.S. Army Corps of Engineers - St. Paul District):

1. Copy GeoTIFF image files from FSA CDs to hard-drive.
2. Change file permissions (read/write).

Use Lizardtech's MrSID Workstation version 1.5 to create MrSID files as follows:

Quarter-quadrangle version:
3. Use the following MrSID compression options
a. Advanced Image Enhancement
G-Weight - 2
Weight - 2
b. Encode Settings
Encoding Ratio 20:1
Zoom Level 9
Target Thumbnail 20 Pixels
Block Size 512
4. Compress all original FSA TIFF files into individual MrSID images
5. Assign Projection/Datum to images (ESRI VBA Script)

County mosaic version:
6. Using original FSA TIFF files, generate MrSID mosaic
7. Use naming convention 'fsa_countyname_mosaic_2002.sid'
8. MrSID compression options: (Same as above except as noted below)
a. No Data
X input No Data 255 255 255
Y Input No Data 255 255 255
9. Assign Projection/Datum to mosaic (ESRI VBA Script)

Some mosaics are in UTM Zone 15 and others in UTM Zone 14.

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 8-bit pixels represent brightness values 0 - 255
Detailed Citation None
Table Detail:

Section 6 Distribution
Publisher Minnesota Geospatial Information Center (MnGeo)
Publication Date 2002
Contact Person Information Nancy Rader, GIS Data Specialist
Minnesota Geospatial Information Office (MnGeo)
658 Cedar Street, Room 300
St. Paul, MN  55155
Phone: 651-201-2489
Email: gisinfo.mngeo@state.mn.us
Distributor's Data Set Identifier naip02
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: http://www.mngeo.state.mn.us/chouse/disclaimer.html
Ordering Instructions There are two options for obtaining NAIP 2002 imagery, depending on the format and file size you need:

1. MrSID county mosaics: See http://www.mngeo.state.mn.us/chouse/airphoto/naip02mrsid.html
This webpage explains more about MrSID format and contains direct links to download each county file.

2. GeoTIFF quarter quadrangles: obtain this imagery from the APFO office in Salt Lake City: https://www.fsa.usda.gov/programs-and-services/aerial-photography/imagery-programs/naip-imagery/ordering-naip-imagery/index

Note: A sample NAIP2002 GeoTIFF photo (77 mb, zipped) is posted at:
ftp://ftp.gisdata.state.mn.us/pub/data/remote_sensing/naip/2002/pickwick_sw_naip02.zip
It covers the Pickwick SW quarter-quad in Winona County, an area in southeastern Minnesota that has high topographic relief. The GeoTIFF file (4309105_SW_20020808.TIF) is accompanied by a header record (.TFW) and a metadata record for that specific photo.
Online Linkage I AGREE to the notice in "Distribution Liability" above. Clicking to agree will either begin the download process, link to a service, or provide more instructions. See "Ordering Instructions" above for details.

Section 7 Metadata Reference
Metadata Date 05/16/2018
Contact Person Information Nancy Rader, GIS Data Specialist
Minnesota Geospatial Information Office (MnGeo)
658 Cedar Street, Room 300
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: 05/16/2018
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