Ontario County 60 centimeter Resolution Panchromatic Orthoimagery

Metadata:


Identification_Information:
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Identification_Information:
Citation:
Citation_Information:
Originator: NYS Cyber Security
Publication_Date: Summer 2006
Title:
Ontario County 60 centimeter Resolution Panchromatic Orthoimagery
Geospatial_Data_Presentation_Form: remote-sensing image
Series_Information:
Series_Name: NYS Digital Orthoimagery Program (NYSDOP)
Publication_Information:
Publisher: NYS CSCIC
Description:
Abstract:
This metadata record describes the 2005 digital ortho mapping of Ontario County, New York.  Image pixel size is 60 centimeters GSD. Image type is panchromatic. Image horizontal accuracy is +/-8 ft. at the 95% confidence level.  Each file contains an image covering 1500 meters by 1500 meters on the ground.
Purpose:
This digital orthoimagery 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.
Supplemental_Information:
Digital elevation models used for orthorectification were compiled from several sources, all of which were compiled photogrammetrically.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: April 2005
Currentness_Reference:
ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: Irregular
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -77.639361
East_Bounding_Coordinate: -76.925366
North_Bounding_Coordinate: 43.052758
South_Bounding_Coordinate: 42.566475
Keywords:
Theme:
Theme_Keyword_Thesaurus: Orthophoto, ortho
Theme_Keyword: Digital orthoimagery
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.
Use_Constraints:
Use of original 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:

Native_Data_Set_Environment:
TIFF images scanned on a Z/I high-resolution photoscanner.
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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 and is based on the co-ordinate pair of the lower left corner of the ortho tile. When the ortho tiles were created the file
names were restricted to a numeric value representing the lower left corner of the ortho tile. 2145077750 represents a tile with the lower left
corner of 214500, 4777500. The 4 million place was left off. These tiles were then all renamed using a batch script so that they reflected the N.Y. state standard
u_2145077750_60_4400_pan_2005.tif Consistency of file naming was ensured by the batch process.
                
Completeness_Report:
The project consisted of 853 final tiles
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
+/-8 ft. at the 95% confidence level (NSSDA)
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
Not applicable.
Lineage:
Process_Step:
Process_Description:
1:28,800 scale aerial photography with airborne GPS was acquired April 9 to May 24, 2005 with a Zeiss RMK TOP 15 Camera and a Wild RC-20 aerial camera system equipped with six focal length lens. The imagery was scanned at 14 microns directly from the aerial negatives.
The aero triangulation process utilized an airborne gps survey undertaken during the flight to provided geodetic coordinates and elevation of photo centers. Also, image targeted ground control points where visible on the 2005 aerial flight and were used as control.  Aerial triangulation was performed using softcopy workstations and Mira Solutions AT bundle adjustment program, Mira-AT. Details of the aerial triangulation process can be found in the Ontario County, New York 2005 Orthophoto Update Project Aerial Triangulation Report. For the 2002 orthophoto project only minimum DTM was collected in the center area of each aerial photo model creating an uneven distribution of terrain data throughout the project area. This process created what has been called "donut-holes" in the DTM and limited the usefulness of the data set for future ortho photo projects and other applications for this level of DTM.
The 2005 project requirement was to fill in these sparse areas of DTM to create a consistent pattern digital terrain points throughout the project area. This was done by using a softcopy workstation with the AMSA-Softcopy program, overlaying the existing DTM on the stereo model and then adding points or breaklines to create a uniform level of digital terrain data.  During this process the aerial photography was inspected for new roads and bridges that required collection of a bridge polygon that was used to correct the shape of the bridge during the orthophoto process. The photo inspection was assisted by information provided by Ontario County as to the location of new roadways since 2002.
The images were then ortho rectified using Mira Solutions Mira Ortho software. Mira Solutions Mira Mosaic program was used for the mosaicking, color balancing and tiling of the imagery. The Mira Solutions process produced the same effect for bridges as was required to meet the previous ortho photo project. Quality
control was maintained throughout the process using internal QA programs within the Mira Solutions suite of orthophoto production software. Final files were then compressed using MrSID. Final deliverables in TIFF format with TFW files and MrSID files where placed on DVD Media.
                                 
Cloud_Cover: <1%
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Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Pixel
Row_Count: 2500
Column_Count: 2500
Vertical_Count: 1
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Spatial_Reference_Information:
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Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 18
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999600
Longitude_of_Central_Meridian: -75.000000
Latitude_of_Projection_Origin: 0.000000
False_Easting: 500000.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: row and column
Coordinate_Representation:
Abscissa_Resolution: 0.600000
Ordinate_Resolution: 0.600000
Planar_Distance_Units: meters
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
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Entity_and_Attribute_Information:
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Entity_and_Attribute_Information:
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Distribution_Information:
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Distribution_Information:
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Transfer_Size: 606
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Metadata_Reference_Information:
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Metadata_Reference_Information:
Metadata_Date: 20050928
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NYS CSCIC
Contact_Person: Tim Ruhren
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
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Extensions:
Profile_Name: ESRI Metadata Profile
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