NAIP_1M_CLRIR_2012

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Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: VT Center for Geographic Information
Publication_Date: 20140627
Publication_Time: unknown
Title: NAIP_1M_CLRIR_2012
Edition: 2012A
Geospatial_Data_Presentation_Form: raster digital data
Series_Information:
Series_Name: NAIP imagery (2012) - statewide
Issue_Identification: 2012A
Publication_Information:
Publication_Place: Waterbury VT 05676
Publisher: VT Center for Geographic Information
Other_Citation_Details: Tile Structure - QQUAD
Citation:
Citation_Information:
Originator: USDA-FSA-APFO Aerial Photography Field Office
Publication_Date: 20121012
Title: NAIP Digital Ortho Photo Image
Geospatial_Data_Presentation_Form: remote-sensing image
Publication_Information:
Publication_Place: Salt Lake City, Utah
Publisher: USDA-FSA-APFO Aerial Photography Field Office
Description:
Abstract:
The NAIP_1M_CLRIR_2012 dataset is a (1 meter) truecolor and infrared (4 band) NAIP imagery product acquired during the summer of 2012 by the USDA-FSA-APFO NAIP program, then reprojected to VT State Plane Meters and cropped to the USGS quarter quad boundary by VCGI.
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 of ortho imagery within one year of acquisition. NAIP provides four 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); 2 meter GSD ortho imagery rectified to within +/- 10 meters of reference DOQQs; 1 meter GSD ortho imagery rectified to within +/- 6 meters to true ground; and, 2 meter GSD ortho imagery rectified to within +/- 10 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. NAIP quarter quads are formatted to the UTM coordinate system using NAD83. NAIP imagery may contain as much as 10% cloud cover per tile.
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. While suitable for a variety of uses the 2 meter GSD NAIP imagery is primarily intended to assess crop condition and compliance to USDA farm program conditions. The 2 meter imagery is generally acquired only for agricultural areas within state projects.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20120706
Ending_Date: 20120820
Currentness_Reference: Ground Condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: Irregular
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -73.44
East_Bounding_Coordinate: -71.46
North_Bounding_Coordinate: 45.02
South_Bounding_Coordinate: 42.72
Keywords:
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: imageryBaseMapsEarthCover
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: farming
Theme_Keyword: Digital Ortho rectified Image
Theme_Keyword: Ortho Rectification
Theme_Keyword: Quarter Quadrangle Centered
Theme_Keyword: NAIP
Theme_Keyword: Aerial Compliance
Theme_Keyword: Compliance
Place:
Place_Keyword_Thesaurus: Geographic Names Information System
Place_Keyword: VT
Access_Constraints: None
Use_Constraints:
VCGI, State of VT, and the USDA-FSA-APFO Aerial Photography Field Office make no representations of any kind, including but not limited to the warranties of merchantability or fitness for a particular use, nor are any such warranties to be implied with respect to the data.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: VT Center for Geographic Information
Contact_Address:
Address_Type: Mailing and Physical Address
Address: 1 National Life Dr, Dewey Building, 2nd Floor
City: Montpelier
State_or_Province: VT
Postal_Code: 05620-2001
Country: USA
Contact_Voice_Telephone: (802) 585-0820
Contact_TDD/TTY_Telephone: None
Contact_Facsimile_Telephone:
Contact_Electronic_Mail_Address: vcgi@vermont.gov
Hours_of_Service: 9am - 5pm, M-F
Data_Set_Credit:
USDA-FSA-APFO Aerial Photography Field Office, 3001 Inc. (NAIP contractor), VCGI
Security_Information:
Security_Classification_System: N/A
Security_Classification: Unclassified
Security_Handling_Description: No Security Considerations

Data_Quality_Information:
Logical_Consistency_Report:
NAIP 3.75 minute tile file names are based on the USGS quadrangle naming convention.
Completeness_Report: None
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report: FSA Digital Orthophoto Specs.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: USDA-FSA-APFO Aerial Photography Field Office
Publication_Date: 20121012
Title: NAIP 2012
Geospatial_Data_Presentation_Form: remote-sensing image
Type_of_Source_Media: UnKnown
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20120706
Ending_Date: 20120820
Source_Currentness_Reference: Aerial Photography Date for aerial photo source.
Source_Citation_Abbreviation: Georectifed Image
Source_Contribution: Digital Georectifed Image.
Process_Step:
Process_Description:
DOQQ Production Process Description USDA FSA APFO NAIP Program 2012 State: Vermont
The imagery was collected using ADS40-SH51,ADS40-SH52, and ASD40-SH81 digital sensors. Collection was performed using a combination of twin-engine aircraft flying at 22,500 or 27,000 ft above mean terrain with 25% sidelap, giving the collected data nominal ground sampling distance of 0.7 meters. Based-upon the CCD Array configuration present in the ADS40 digital sensor, imagery for each flight line is 12,000-pixels in width. Red, Green, Blue, Near-Infrared and Panchromatic image bands were collected.
Collected data was downloaded to portable hard drives and shipped to the processing facility daily. Raw flight data was extracted from external data drives using GPro software. Airborne GPS / IMU data was post-processed using IPAS, PosPac and/or TerraPos software and reviewed to ensure sufficient accuracy for project requirements.
Using Pictovera software, planar rectified images were generated from the collected data for use in image quality review. The planar rectified images were generated at five meter resolution using a two standard deviation histogram stretch. Factors considered during this review included but were not limited to the presence of smoke and/or cloud cover, contrails, light conditions, sun glint and any sensor or hardware-related issues that potentially could result in faulty data. When necessary, image strips identified as not meeting image quality specifications were re-flown to obtain suitable imagery.
Aero triangulation blocks were defined primarily by order of acquisition and consisted of four to seventeen strips. Image tie points providing the observations for the least squares bundle adjustment were selected from the images using an auto correlation algorithm. Photogrammetric control points consisted of photo identifiable control points, collected using GPS field survey techniques. The control points were loaded in to a softcopy workstation and measured in the acquired image strips. A least squares bundle adjustment of image pass points, control points and the ABGPS was performed to develop an aero triangulation solution for each block using Pictovera software.
Upon final bundle adjustment, the triangulated strips were ortho-rectified to the DEM. Digital elevation models (DEM) auto-correlated from imagery acquired for project items will be used in the orthorectification process. The PictoVera autocorrelation module is used to generate digital surface model (DSM) mass points for each survey line. The autocorrelation module uses an APM algorithm to measure mass points from the forward, nadir, and backward images; searching in the three images throughout the entire width and length of each flightline for matching features. The DSM mass points will model the ground surface and above ground features, and must be filtered to a digital terrain model (DTM) representing only ground features for use in orthorectification. PremierGeo uses the SimActive Correlator 3D software to generate the required DTM from the PictoVera DSM. Correlator 3D uses geometric algorithms to identify and filter above ground features from the DSM based on size and shape. The filtered DTM is then interpolated to a regularly gridded DEM for use in the PictoVera rectification module. The DEM is reviewed for any elevation anomalies that would introduce image smearing during orthorectification, and manual edits made as necessary to remove any anomalies.
Positional accuracy was reviewed in the rectified imagery by visually verifying the horizontal positioning of the known photo-identifiable survey locations using ArcGIS software.
The red, green, and blue bands were combined to generate a final ortho-rectified image strip. The ADS40 sensor collects twelve bit image data which requires radiometric adjustment for output in standard eight bit image channels. The ortho- rectified image strips were produced with the full 12 bit data range, allowing radiometric adjustment to 8 bit range to be performed on a strip by strip basis during the final mosaicking steps.
The imagery was mosaicked using manual seam line generation in Orthovista Seam Editor (OVSE). The 12 bit data range was adjusted for display in standard eight bit image channels by defining a piecewise histogram stretch using OrthoVista software. A constant stretch was defined for each image collection period, and then strip by strip adjustments were made as needed to account for changes in sun angle and azimuth during the collection period. Strip adjustments were also made to match the strips histograms as closely as possible to APFO specified histogram metrics and color balance requirements. Automated balancing algorithms were applied to account for bi- directional reflectance as a final step before the conversion to 8 bit data range.
Process_Date: 20121012
Process_Step:
Process_Description:
The GeoTIFFs were generated by reprojecting the original UTM files and then cropped to the quarter quad "envelope" by VCGI to eliminate nodata areas.
Process_Date: 20140418
Process_Time: Unknown
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Steve Sharp
Contact_Organization: VCGI
Process_Step:
Process_Description:
VCGI generated JPEG2000 compressed (20x) files from the reprojected GeoTIFFs.
Process_Date: 20140508
Process_Time: Unknown
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Steve Sharp
Contact_Organization: VCGI
Process_Step:
Process_Description: VCGI posted data to VCGI Image Library for download.
Process_Date: 20140627
Process_Time: Unknown
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Ivan Brown
Contact_Organization: VCGI
Cloud_Cover: 5%

Spatial_Data_Organization_Information:
Indirect_Spatial_Reference: Raster
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Pixel
Row_Count: 1
Column_Count: 1

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: State Plane Coordinate System
State_Plane_Coordinate_System:
SPCS_Zone_Identifier: 4400
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999964
Longitude_of_Central_Meridian: -72.500000
False_Easting: 500000.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.001
Ordinate_Resolution: 0.001
Planar_Distance_Units: Meters
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137
Denominator_of_Flattening_Ratio: 1 / 298.25722210

Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview: 32-bit pixels, 4 band color(RGBIR) values 0 - 255
Entity_and_Attribute_Detail_Citation: None

Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: VT Center for Geographic Information
Contact_Address:
Address_Type: Mailing and Physical Address
Address: 1 National Life Dr, Dewey Building, 2nd Floor
City: Montpelier
State_or_Province: VT
Postal_Code: 05620-2001
Country: USA
Contact_Voice_Telephone: (802) 585-0820
Contact_TDD/TTY_Telephone: None
Contact_Facsimile_Telephone:
Contact_Electronic_Mail_Address: vcgi@vermont.gov
Hours_of_Service: 9am - 5pm, M-F
Resource_Description: VIL_datasetname
Distribution_Liability:
VCGI and the State of Vermont make no representations of any kind, including but not limited to the warranties of merchantability or fitness for a particular use, nor are any such warranties to be implied with respect to the data.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: JPEG2000 and GeoTIFF
Format_Specification: JPEG2000 (20x compression) and GeoTIFF
Format_Information_Content: geospatial data
File_Decompression_Technique: Image viewer
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
https://maps.vcgi.vermont.gov/gisdata/vcgi/imagery/NAIP/1M/CLRIR/2012/COMP/
Access_Instructions:
Download compressed (JPEG2000) from web site. Uncompressed GeoTIFF available on offline media.
Offline_Option:
Offline_Media: USB drive
Fees:
No charge when downloading from the internet, and when no custom processing is required.
Ordering_Instructions: Send an email describing data request to vcgi@vermont.gov
Turnaround: About 5 days.
Custom_Order_Process: Send an email describing data request to vcgi@vermont.gov
Technical_Prerequisites: GIS Software
Available_Time_Period:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: yyyymmdd
Time_of_Day: Unknown

Metadata_Reference_Information:
Metadata_Date: 20230302
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: VT Center for Geographic Information
Contact_Person: GIS Database Administrator
Contact_Address:
Address_Type: Mailing and Physical Address
Address: 1 National Life Dr, Dewey Building, 2nd Floor
City: Montpelier
State_or_Province: VT
Postal_Code: 05620-2001
Country: USA
Contact_Voice_Telephone: (802) 585-0820
Contact_TDD/TTY_Telephone: None
Contact_Facsimile_Telephone:
Metadata_Standard_Name: FGDC Content Standards for Digital Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: Local time
Metadata_Access_Constraints: None
Metadata_Use_Constraints: None
Metadata_Security_Information:
Metadata_Security_Classification_System: N/A
Metadata_Security_Classification: Unclassified
Metadata_Security_Handling_Description: No security considerations

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