NAIP_1M_CIR_2008

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: VT Center for Geographic Information

Publication_Date: 20090430

Publication_Time: unknown

Title: NAIP_1M_CIR_2008

Edition: 2008CIR

Geospatial_Data_Presentation_Form: raster digital data

Series_Information:

Series_Name: NAIP imagery (2008) - Color Infrared (CIR) extract

Issue_Identification: 2008CIR

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 and 3001 Inc. (contractor)

Publication_Date: 20090430

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_CIR_2008 dataset is a 1:40000 scale (1 meter) Color Infrared (CIR) extract generated from the master NAIP 2008 dataset (NAIP_1M_CLRIR_2008). Refer to master NAIP_1M_CLRIR_2008 metadata for details.
The master NAIP 2008 includes 4 bands (Red,Green,Blue,Infrared). The NAIP_1M_CIR_2008 extract is limited to 3 bands (Red=IR, Green=R, Blue=G).
NOTE: The NAIP_1M_CIR_2008 Color Infrared (CIR) extract is ONLY AVAILABLE IN COMPRESSED FORMAT (JPEG2000).

Purpose: Provide an easy-to-use Color Infrared imagery product.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 200808

Currentness_Reference: Ground Condition

Status:

Progress: Complete

Maintenance_and_Update_Frequency: Irregular

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -72.9375

East_Bounding_Coordinate: -72.8750

North_Bounding_Coordinate: 43.0000

South_Bounding_Coordinate: 42.9375

Keywords:

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category

Theme_Keyword: imageryBaseMapsEarthCover

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: color infrared

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:

VCGI and the State of VT 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.

Use_Constraints:

For all products, services, Internet Website, and data, excepting digital or hardcopy orthophotography collected through the VT Tax Department’s Mapping Program, the direct, non-value added, reproduction of State of Vermont or VCGI’s products, services, Website, or data with intent to sell is prohibited without the written consent of VCGI. For all digital or hardcopy orthophotography collected through the VT Tax Department’s Mapping Program, copying, reprinting, duplicating, selling or attempting to sell is prohibited. Vermont Statute 32 V.S.A. § 3409 permits a fine, not to exceed $1,000.00, for any person violating this prohibition.

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, UVM Spatial Analysis Lab (SAL), and other contributors to the VT NAIP 2008 project.

Security_Information:

Security_Classification_System: N/A

Security_Classification: Unclassified

Security_Handling_Description: No Security Considerations

Native_Data_Set_Environment: Unknown

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 and 3001 Inc. (contractor)

Publication_Date: 20090430

Title: NAIP 2008 Vermont

Geospatial_Data_Presentation_Form: remote-sensing image

Type_of_Source_Media: Digital Linear Tape (DLT)

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 200808

Source_Currentness_Reference: Aerial Photography Date for aerial photo source.

Source_Citation_Abbreviation: Georectifed Image

Source_Contribution: Digital Georectifed Image.

Process_Step:

Process_Description:

The imagery was collected at a flying height of 28000 ft above mean terrain with 25% sidelap using an ADS40 digital sensor, giving the collected data nominal ground sampling distance of 0.9 meters. Collected data was downloaded to portable hard drives and shipped to the processing facility daily. Airborne GPS / IMU data was processed and reviewed to ensure sufficient accuracy for project requirements. 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 and sun glint. When necessary, image strips identified as not meeting image quality specifications were re-flown to obtain suitable imagery. Aerotriangulation blocks were defined primarily by order of acquisition and consisted of two to twelve strips. Image tie points points providing the observations for the least squares bundle adjustment were selected from the images using an autocorrelation algorithm. Photogrammetric control points consisted of photo identifiable points established using static and rapid-static GPS techniques. Final coordinate values were calculated using National Geodetic Survey (NGS) Online Positioning User Service (OPUS) or the NGS Online Positioning User Service-Rapid Static (OPUS-RS). 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 aerotriangulation solution for each block. Precedence was given to the photo identifiable control points over control provided by the ABGPS solution in the bundle adjustment. The triangulated strips were ortho-rectified to the USGS NED DEM for the project area. The images were re-sampled from the raw resolution of 0.9 meters to the required resolution of 1.0 meters using a cubic convolution filter during the process. The red, green, blue, and NIR 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 mosaicing steps. The imagery was mosaicked using a combination of automated and manual seamline generation. The 12 bit data range was adjusted for display in standard eight bit image channels by defining a piecewise histogram stretch. 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. APFO specified DOQQs were extracted from the final mosaic in GeoTIFF format. Each DOQQ clipped from the mosaic was reviewed for conformance to APFO histogram metrics and color balance parameters using automated procedures. Images flagged for non-conformance were reviewed and adjusted manually on an image by image basis to bring them into conformance. In extreme cases, such as when a DOQQ was comprised primarily of water, modification of the histogram metrics to match targets caused severe degradation of image quality. In these cases, the water was masked out and histogram adjustments were applied to land. GeoTIFF tags for the appropriate UTM zone were then applied to all images.

Process_Date: 20090430

Process_Step:

Process_Description:

The GeoTIFFs were generated by reprojecting the original UTM files via ERDAS IMAGINE. The work was completed b Jarlath O'Neil-Dunne at the UVM Spatial Analysis Lab (SAL). The images were then cropped to the quarter quad "envelope" by VCGI to eliminate nodata areas.

Process_Date: 20090701

Process_Step:

Process_Description:

VCGI generated JPEG2000 compressed (20x) files from the GeoTIFFs limited to 3 bands(Red=IR, Green=R, Blue=G)

Process_Date: 20090715

Process_Step:

Process_Description:

VCGI posted the compressed JPEG2000 (ONLY!!) data to VCGI Image Library for download.

Process_Date: 20090817

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:

3 band color(Red=IR, Green=R, Blue=G) - compressed JPEG2000 format

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: NAIP_1M_CIR_2008

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

Format_Specification: JPEG2000 (20x compression)

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/CIR/2008/COMP/

Access_Instructions:

Download compressed (JPEG2000) from web site. Uncompressed GeoTIFF NOT available for this imagery product.

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: 20090701

Time_of_Day: Unknown

Metadata_Reference_Information:

Metadata_Date: 20090624

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