Rensselaer County 60 centimeter Resolution Color Infrared Orthoimagery

Metadata:


Identification_Information:
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Identification_Information:
Citation:
Citation_Information:
Originator:
Publication_Date: Summer 2005
Title:
Rensselaer County 60 centimeter Resolution Color Infrared Orthoimagery
Geospatial_Data_Presentation_Form: remote-sensing image
Series_Information:
Series_Name: NYS Digital Orthoimagery Program (NYSDOP)
Publication_Information:
Publisher: NYS Office of Cyber Security
Description:
Abstract:
 These files contain 2004 digital orthoimagery of Rensselaer County, New York. Image pixel size is 2.0 ft. GSD. Image type is color infrared. 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 & May 2004
Currentness_Reference:
ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: Irregular
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -73.783836
East_Bounding_Coordinate: -73.258956
North_Bounding_Coordinate: 42.968084
South_Bounding_Coordinate: 42.448329
Keywords:
Theme:
Theme_Keyword_Thesaurus: Orthophoto, ortho
Theme_Keyword: Digital orthoimagery
Access_Constraints:
Use_Constraints:

Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Tim Ruhren
Contact_Organization: NYS Office of 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:
Lineage:
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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. 10470162 which represented a tile with the lower left
corner of 1047000, 162000. These tiles were then all renamed using a batch
script so that they reflected the N.Y. state standard
w_10470162_12_07200_col_2004.tif Consistency of file naming was ensured by
the batch process.
Completeness_Report:
The project consisted of 837 final tiles
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
+/-4 ft. at the 95% confidence level (NSSDA)
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
Not applicable.
Lineage:
Process_Step:
Process_Description:
The aerial film was acquired in 2004. The imagery was scanned at 14 microns using a Z/I Imaging Photoscan TD-1 scanner. The Ground control used to support the ortho mapping was collected by identifying strategic points on the aerial photography then determining the coordinates by ground survey techniques.  The Aerial Triangulation was performed using softcopy workstations and Intergraph's ISDM software. Bundle adjustment was performed using PAT-B and  Digital Elevation Models were created using standard photogrammetric collection techniques on Intergraph's SSK soft copy workstation. During the bridging process, both the DEM and the bridge deck were captured as well as the ground features surrounding the bridge. A "DTM apron" was created at each side of the elevated bridge and the resulting smearing is located and accumulated in the solid black apron area.                                    
The images were then ortho rectified using Intergraph's Base Rectifier software. Color balancing was performed using both Intergraph's IRASC package and Orthovista. Seamless mosaicing was performed using Triathlon's AIM software and the seamless mosaic was clipped into tiles using Triathlon's Clipmos software. Images were then quality controlled using Intergraph's IRASC and Adobe PhotoShop software. Final files were then compressed using MrSID. Final deliverables in tiff format with tfw files and MrSID files where placed on DVD Media. Final quality control for horizontal accuracy and image quality was performed by New York State.
Cloud_Cover: <1%
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Spatial_Data_Organization_Information:
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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: 807
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Metadata_Reference_Information:
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Metadata_Reference_Information:
Metadata_Date: 20050630
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NYS OCS
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:
Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile
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