NAIP 2006

Identification Information

Citation Information

Originator	USDA National Agriculture Imagery Program
Publication Date	2006-08
Title	NAIP 2006
Geospatial Data Presentation Form	remote-sensing image
Series Name	National Agriculture Imagery Program
Publication Place	Augusta ME
Publisher	Maine Office of Geographic Information Systems (MEGIS)
Online Linkage	http://www.maine.gov/geolib/wms.htm
Calendar Date	200608
Time of Day	Unknown
[smcisrcc]	publication date

Abstract

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 +/- 5 meters of reference digital ortho quarter quads (DOQQ's) from the National Digital Ortho Program (NDOP); and, 2 meter GSDortho 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 (15:1) and compression levels(9) are used.

Purpose

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 acquisition date.

Time Period of Content

Calendar Date	2006
Time of Day	Unknown
Currentness Reference	Majority years of Photography Dates

Status

Progress	Complete
Maintenance and Update Frequency	Irregular

Bounding Coordinates

West Bounding Coordinate	-71.189751
East Bounding Coordinate	-66.840343
North Bounding Coordinate	47.37834
South Bounding Coordinate	43.05602

Keywords

Theme	Digital, Mosaic, ortho imagery, United States Department of Agriculture (USDA), Farming, naip (Maine GIS Thesaurus-Theme)
Theme	imageryBaseMapsEarthCover (ISO Keyword Thesaurus)
Place	USA, FSA, Field Service Center, Aerial Photography Field Office, APFO, USDA, United State Department of Agriculture (USDA), Androscoggin CO. Maine FSA, FIPS 23001, Androscoggin, Maine (None)

Access Constraints

None

Use Constraints

None, The Aerial Photography Field Office asks to be credited in derived products.

Contact Organization

USDA-FSA Aerial Photography Field Office

Address Type

mailing and physical

Address

2222 West 2300 South

City

Salt Lake City

State or Province

Utah

Postal Code

84119-2020

Contact Voice Telephone

801-975-3500

Contact Electronic Mail Address

sales@apfo.usda.gov

Native Data Set Environment

Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.3.1.3000

Logical Consistency Report

none

Completeness Report

none

Horizontal Positional Accuracy Report

None

Citation Information

Originator	Aerial Photography Field Office
Publication Date	20070104
Title	Aerial Photography Field Office
Publication Place	Augusta ME
Publisher	Maine Office of Geographic Information Systems (MEGIS)
[smcilnkh]	false
[smcisrcs]	40000
[smcisrcm]	CD-ROM
Calendar Date	2006
Time of Day	Unknown
[smcisrcc]	Majority Aerial Photography Date

Source Scale Denominator

40000

Type of Source Media

CD-ROM

Calendar Date

2006

Time of Day

Unknown

Source Currentness Reference

Majority Aerial Photography Date

Process Description

Color Digital imagery was collected with a Leica ADS40 Digital Sensor. The ADS40 CCD array includes 12,000 pixels across track at 6.5 microns. The digital imagery was acquired with a minimum of 20% sidelap, then processed using Leica software to produce geo-referenced raster swaths. The ADS imagery is subsequently used in the Aerial Triangulation (AT) process in preparation for orthorectification. The horizontal accuracy of the orthorectified imagery is primarily determined by the quality of the airborne GPS, Inertial Measurement Unit (IMU) data and the surface model (digital elevation model or DEM). The AT process is initiated with the population of ADS project files with ABGPS/IMU data, horizontal control from USDA furnished mosaicked DOQQs (mDOQQs) and vertical control picked from the USGS DTED2 DEM data. IMU rotational data is checked by reading common points on the mosaicked DOQQs and on the new imagery. As a final check, stereo models are analyzed for parallax. The absolute orientations for each swath containing exterior orientation parameters for scan line is then output for use in orthorectification. Each DOQQ is inspected for relative horizontal accuracy with adjacent DOQQ tiles. Each DOQQ is inspected for image quality. DOQQs are color and radiometrically balanced over a block consisting of a large number of images. A sample of DOQQs is selected and inspected for relative horizontal accuracy with the USDA furnished mDOQQs. Completed and approved DOQQs are assembled into a countywide MrSID file, using a compression factor of 1:50. The countywide MrSID file was then imported into ArcSDE on a quad-by-quad basis.

Process Date

20070104

Cloud Cover

Indirect Spatial Reference

None

Direct Spatial Reference Method

Raster

Raster Object Type

Pixel

Row Count

101129

Column Count

56146

Vertical Count

Grid Coordinate System Name

UTM Zone Number

Scale Factor at Central Meridian

0.9996

Longitude of Central Meridian

-69

Latitude of Projection Origin

False Easting

500000

False Northing

Planar Coordinate Encoding Method

Abscissa Resolution

Ordinate Resolution

Planar Distance Units

Horizontal Datum Name

North American Datum of 1983

Ellipsoid Name

Geodetic Reference System 80

Semi-major Axis

6378137

Denominator of Flattening Ratio

298.257

Altitude Resolution

1.000000

Altitude Encoding Method

Explicit elevation coordinate included with horizontal coordinates

Entity and Attribute Overview

24-bitpixels, 3 bandcolors (RGB) representing brightness values 0 - 255.

Entity and Attribute Detail Citation

USDA-FSA Aerial Photography Field Office Contract Specifications.

Entity and Attribute Overview

24-bitpixels, 3 bandcolors (RGB) representing brightness values 0 - 255.

Entity and Attribute Detail Citation

USDA-FSA Aerial Photography Field Office Contract Specifications.

Contact Organization

Maine Office of Geographic Information Systems

Contact Position

GIS Coordinator

Address Type

mailing address

Address

State House Station 174

City

Augusta

State or Province

Postal Code

04333-0174

Country

USA

Contact Voice Telephone

(207) 624-7700

Contact Facsimile Telephone

(207) 287-3842

Hours of Service

Monday through Friday 0800 - 1700 EST

Distribution Liability

Users must assume responsibility to determine the usability of this data for their purposes.

Format Name

WMS

Format Version Number

1.1

Format Specification

OpenGIS (OGC) Web Map Service (WMS)

[accinstr]

The Maine Office of GIS and the GeoLibrary Board provide web mapping services to distribute aerial photos and other digital data. A WMS is not a web application which you can see in a web browser; rather, it requires you to add the service to a GIS software application.

[smdistty]

Fees

None

Ordering Instructions

http://www.maine.gov/geolib/wms.htm

Metadata Reference Information

Metadata Date

20100301

Metadata Review Date

Metadata Future Review Date

Metadata Contact

Contact Organization	USDA-FSA Aerial Photography Field Office
Contact Person	REQUIRED: The person responsible for the metadata information.
Address Type	mailing address
Address	2222 West 2300 South
City	Salt Lake City
State or Province	Utah
Postal Code	84119-2020
Contact Voice Telephone	801-975-3500
Contact Electronic Mail Address	sales@apfo.usda.gov

Metadata Standard Name

FGDC Content Standards for Digital Geospatial Metadata

Metadata Standard Version

FGDC-STD-001-1998

Metadata Time Convention

local time

Metadata Access Constraints

none

Metadata Use Constraints

none