Suffolk County Digital Ortho (Color Infrared) - 6"

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: NYS Cyber Security
Publication_Date: Spring 2007
Title:
Suffolk County Digital Ortho (Color Infrared) - 6"
Geospatial_Data_Presentation_Form: remote-sensing image
Series_Information:
Series_Name: NYS Digital Ortho-imagery Program (NYSDOP)
Publication_Information:
Publisher: NYS CSCIC
Description:
Abstract:
These files contain 2007 digital Ortho-imagery of Suffolk County, New York.  Image pixel size is  0.5 ft GSD.  Image type is Color Infrared.  Image horizontal accuracy is within 2 ft. at the 95% confidence level (NSSDA).  Each file contains an image covering 3000 ft. by 2000 ft. on the ground.
Purpose:
This digital Ortho-imagery can serve a variety of purposes, from general planning to field reference for spatial analysis to a tool for revision of vector maps.  It can also serve as a reference layer for GIS.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: Mar 2007
Ending_Date: May 2007
Currentness_Reference:
ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: Irregular
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -73.501705
East_Bounding_Coordinate: -73.490811
North_Bounding_Coordinate: 40.906685
South_Bounding_Coordinate: 40.901149
Keywords:
Theme:
Theme_Keyword_Thesaurus: Ortho-photo, Ortho
Theme_Keyword: Digital Ortho-imagery
Access_Constraints: Some imagery tiles are classified as sensitive due to their content. These sensitive imagery tiles have been reprocessed to reduce the clarity of sensitive features. Non-sensitive content on these tiles is unaltered. Only the re-processed versions of sensitive tiles are made openly available to the public. A separate procedure is available for requesting original, full resolution versions of these tiles. Please contact CSCIC for more information on these criteria.
Use_Constraints:
Use of sensitive imagery, if granted, is only for the use specified in the request.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Tim Ruhren
Contact_Organization: NYS Cyber Security
Contact_Position: NYS GIS Clearinghouse
Contact_Address:
Address_Type: Mailing and Physical Address:
Address:
30 South Pearl Street
City: Albany
State_or_Province: New York
Postal_Code: 12207-3425
Country: USA
Contact_Voice_Telephone: 518-474-5212
Contact_Facsimile_Telephone: 518-473-5848
Contact_Electronic_Mail_Address: nysgis@dhses.ny.gov
Data_Set_Credit:
NYS Cyber Security
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.0.1324
Back to Top
Data_Quality_Information:
Logical_Consistency_Report:
The dataset contains raster images or digital ortho images so the logical consistency report is not applicable.  The file naming convention was supplied by New York State.  When the ortho tiles were created the file names were restricted to a numeric value representing the lower left corner of the ortho tile.  These tiles were then all renamed using a batch script so that they reflected the N.Y. state standard (i.e. "l_10530252_06_04800_cir_2007.tif").  Consistency of file naming was ensured by using a batch process.  The file naming convention consists of the first letter for Central, East, West or Long Island for New York State Plane Coordinate Systems (NYSPCS).  The following four numeric characters represent the first four characters of the "X" coordinate value for the tile's lower left corner coordinate in NYSPCS and the next four characters represent the first four characters of the "Y" coordinate value for the tile's lower left corner coordinate in NYSPCS.  The next two numeric characters represent the tile's Ground Sampling Distance (GSD) value in ft.   The following five numeric characters represent the Above Mean Terrain (AMT) nominal height at which the DMC sensor recorded or collected the original imagery for the corresponding area.  The next three characters are "col" for Digital Natural Color ortho-photos and "cir" for Digital Color Infrared ortho-photos.  Lastly, the last four numeric digits represent the year in which the particular ortho was created.
Completeness_Report:
The project consisted of 5,665 ortho tiles tiles.
Lineage:
Process_Step:
Process_Description:
The Digital Color Infrared aerial imagery was acquired simultaneously with the Natural Color aerial imagery in spring 2007 using a DMC sensor flown at a nominal height of 4800 feet AMT (Above Mean Terrain).  ABGPS data was also collected to supplement New York State CORS data. High level photography was collected at a nominal height of 20,000 ft AMT, to tie the disjoining smaller islands on the low level photography with the main land. The Ground Control used to support the Digital Natural Color Ortho-imagery production was collected by identifying strategic points on previous aerial photography and supplemented by selecting new points or photo identifiable points (PID) in areas where needed due to a lack or minimal existence of points from previous Ortho-imagery production projects and then determining the precise location coordinates of the entire ground control network by using ground survey techniques. The new Ground Control Network was also supplemented by targeting existing New York State HARN stations data.  The Digital Aerial Triangulation (DAT) was performed, primarily, using softcopy workstations and Intergraph's ISPM / ISAT software or BINGO where applicable.  DAT solutions were independently reviewed and checked using independent blind control points.  Digital Elevation Models (DEM) (mass-points and break-lines) used to support ortho imagery production were updated from the existing terrain data from year 2004 using standard pothogrammetric collection techniques on Intergraph's SSK soft copy workstations.  The images were then ortho-rectified using Intergraph's OrthoPro software.  Radiometric adjustment for the ortho rectified images was performed using both Intergraph's OrthoPro software and Orthovista.  Seamless mosaicking was performed by automatic and manual seam line creation using Intergraph's Orthopro & IRASC software and then importing them into OrthoPro for mosaicking.  Images were then color balanced again in order to match adjacent counties projects and quality controlled using Intergraph's IRASC, OrthoPro and Adobe PhotoShop software.  The seamless mosaic was clipped into tiles using OrthoPro software.  The imagery product deliverables are GeoTIFF images with embedded header information describing the required projection, pixel size, tile size and other related data and corresponding world files (.tfw).  Final files were then compressed to JPG2000 files (.jp2) with corresponding world files (.j2w) at a compression ratio of 20:1 using Lizard Techs GeoExpress v6.0 software. All .jp2's require MapInfo .tab files.
Cloud_Cover: <1%
Back to Top
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Pixel
Row_Count: 4000
Column_Count: 6000
Vertical_Count: 1
Back to Top
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: Lambert Conformal Conic
Lambert_Conformal_Conic:
Lambert Conformal Conic
Standard_Parallel: 40.666667
Standard_Parallel: 41.033333
Longitude_of_Central_Meridian: -74.000000
Latitude_of_Projection_Origin: 40.166667
False_Easting: 984250.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: row and column
Coordinate_Representation:
Abscissa_Resolution: 0.500000
Ordinate_Resolution: 0.500000
Planar_Distance_Units: survey feet
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Datum_Name: North American Vertical Datum of 1988
Altitude_Distance_Units: feet
Altitude_Encoding_Method: Explicit elevation coordinate included with horizontal coordinates
Back to Top
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: Suffolk County Digital Ortho (Color Infrared) - 6"
Back to Top
Distribution_Information:
Resource_Description: Downloadable Data
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Transfer_Size: 0.000
Back to Top
Metadata_Reference_Information:
Metadata_Date: 20071018
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Tim Ruhren
Contact_Organization: NYS Cyber Security
Contact_Position: NYS GIS Clearinghouse
Contact_Address:
Address_Type: mailing and physical address
Address:
30 South Pearl Street
City: Albany
State_or_Province: New York
Postal_Code: 12207-3425
Country: USA
Contact_Voice_Telephone: (518) 474-5212
Contact_Facsimile_Telephone: (518) 473-5848
Contact_Electronic_Mail_Address: nysgis@dhses.ny.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Extensions:
Online_Linkage: http://www.esri.com/metadata/esriprof80.html
Profile_Name: ESRI Metadata Profile
Metadata_Extensions:
Online_Linkage: http://www.esri.com/metadata/esriprof80.html
Profile_Name: ESRI Metadata Profile
Back to Top