Lancaster County, PA - RGB Orthoimages UTM18


Identification_Information:
Citation:
Citation_Information:
Originator:Lancaster County
Publication_Date:2012
Title:
Lancaster County, PA - RGB Orthoimages UTM18
Geospatial_Data_Presentation_Form:remote-sensing imaget
Publication_Information:
Publisher:Lancaster County
Online_Linkage: http://www.pasda.psu.edu/
Description:
Abstract:
True Color (RGB) Orthoimages State Plane for Lancaster County, Pennsylvania 2012
Purpose:
educational
Supplemental_Information:
The imagery for this project was flown at a nominal acquisition altitude (AGL) of 10,000 feet.

      Differential baseline lengths were kept to a minimum by the use of the nearest available CORS stations to the project area.  Maximum baselines were less than 60 km with the mean distance less than 30 km. 

      GPS coordinates were referenced to the National Spatial Reference System (NSRS) through connections to active CORS and/or passive monumented control stations.

      The film camera(s) were calibrated by USGS within 3 years prior to the date of photography.  Digital camera(s) were calibrated by the manufacture and the camera parameters refined through in-situ proprietary procedures.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date:20120321
Ending_Date:20120407
Currentness_Reference:
ground condition
Status:
Progress:Complete
Maintenance_and_Update_Frequency:Irregular
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate:-76.749421
East_Bounding_Coordinate:-75.843369
North_Bounding_Coordinate:40.344599
South_Bounding_Coordinate:39.702038
Keywords:
Theme:
Theme_Keyword_Thesaurus:ISO 19115 Topic Categories
Theme_Keyword:ImageryBaseMapsEarthCover
Access_Constraints:none
Use_Constraints:
IMPORTANT!  The Geographic Information System ("GIS") database you seek to use is licensed by the County of Lancaster - Geographic Information System ("County") only on the condition that you ("You") agree with the County's terms and conditions set forth below.  PLEASE CAREFULLY READ THE TERMS OF THIS DATABASE LICENSE AGREEMENT. 

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 County grants to You a license to use the Database provided on County of Lancaster's Geographic Information System Web site ("Web site") under the following terms and conditions: 
 

TERMS AND CONDITIONS 

1. Definitions.  As used in this Agreement: 

(a) "Database" means the GIS Database which You will be granted access to via this Web site and all information contained therein. 

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(a) The County hereby grants You a nonexclusive, nontransferable license to use the Database, subject to the terms and conditions of this Agreement.  The Database will be deemed in use as of the Effective Date.   Title to and all rights in the Database are and shall remain at all times with the County. 

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THE COUNTY AND ITS SOURCES OF INFORMATION DO NOT GUARANTEE OR WARRANT THE ACCURACY, COMPLETENESS, CURRENTNESS, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OF THE SERVICES, DATABASE OR THE MEDIA ON WHICH THE DATABASE INFORMATION IS PROVIDED AND SHALL NOT BE LIABLE TO YOU FOR ANY LOSS OR INJURY ARISING OUT OF OR CAUSED IN WHOLE OR IN PART BY THE ACTS OR OMISSIONS OF THE COUNTY, ITS PERSONNEL OR THE COUNTY'S SOURCES OF INFORMATION, WHETHER NEGLIGENT OR OTHERWISE, IN PROCURING, COMPILING, COLLECTING, INTERPRETING, REPORTING, COMMUNICATING OR DELIVERING THE INFORMATION OR SERVICES.  THE COUNTY IS PROVIDING THE DATABASE TO YOU WITHOUT ANY WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED.  THE DATABASE IS PROVIDED "AS IS". 

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7. Indemnification.  You agree to indemnify and hold the County harmless from and against any loss, cost, damage or expense, including reasonable attorneys' fees, resulting from or related to any claim or action which relates to (i) Your use of the Database or (ii) this Agreement. 

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Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person:Glenn Mohler
Contact_Organization:Lancaster County GIS Department
Contact_Position:Lancaster County IT/GIS
Contact_Address:
Address_Type:mailing and physical address
Address:
150 N Queen St
City:Lancaster
State_or_Province:Pennsylvania
Postal_Code:17603
Country:United States
Contact_Voice_Telephone:717-391-7550
Contact_Electronic_Mail_Address:Mohler@co.lancaster.pa.us
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Radiometry is verified by visual inspection of the digital orthophoto.  Slight systematic radiometric differences may exist between adjacent orthoimage files; these are due primarily to differences in source image capture dates and sun angles along flight lines. These differences can be observed in an image's general lightness or darkness when it is compared to adjacent orthoimage file coverages. Tonal balancing may be performed over a group of images during the mosaicking process which may serve to lighten or darken adjacent images for better color tone matching.
Logical_Consistency_Report:
GeoTIFFs conform to the specifications set forth in the AeroMetric proposal.
Completeness_Report:
      Orthoimages are visually inspected for completeness to ensure that no gaps or image misplacements exist within and between adjacent images. These images are derived by mosaicking multiple images to ensure complete coverage. Source imagery is cloud free.
      
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Quantitative_Horizontal_Positional_Accuracy_Assessment:
Lineage:
Process_Step:
Process_Description:
The digital images were aero-triangulated to support digital ortho image production for the Lancaster, PA project area.  Ground check point data was provided by AeroMetric, Inc.  The project was referenced to the North American Datum of 1983 (NAD83), UTM Zone 18 horizontally and to the North American Vertical Datum of 1988 (NAVD88) vertically.  Units were in meters.

 
The scale of the aerial photos was 1"=2116'.  The photography was exposed between 3/21/12 and 4/7/12.


Rectification was done using the aerotriangulation data, raw images, and PAMAP DEM data. All photo identifiable ground points were measured to verify the accuracy. These rectified images were used to generate seamlines which were then reviewed and edited. The rectified images were mosaicked, balanced, and cut into final image sheets.  The final sheets were viewed and artifacts were removed as well as other edits performed.  Final UTM sheets were then reprojected to PA-SPCS South Zone.  MrSID county mosaic was processed at 30:1 in MG3 format.
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Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method:Raster
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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:0.9996
Longitude_of_Central_Meridian:-75
Latitude_of_Projection_Origin:0
False_Easting:500,000
False_Northing:0
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method:coordinate pair
Coordinate_Representation:
Abscissa_Resolution:0.076
Ordinate_Resolution:0.076
Planar_Distance_Units:Meters
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Entity_and_Attribute_Information:
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:Pennsylvania Spatial Data Access (PASDA)
Contact_Address:
Address_Type:mailing and physical address
Address:
115 Land and Water building
City:University Park
State_or_Province:Pennsylvania
Postal_Code:16802
Country:United States
Contact_Voice_Telephone:(814) 865 - 8792
Contact_Electronic_Mail_Address:pasda@psu.edu
Distribution_Liability:
The USER shall indemnify, save harmless, and, if requested, defend those parties involved with the development and distribution of this data, their officers, agents, and employees from and against any suits, claims, or actions for injury, death, or property damage arising out of the use of or any defect in the FILES or any accompanying documentation. Those parties involved with the development and distribution excluded any and all implied warranties, including warranties or merchantability and fitness for a particular purpose and makes no warranty or representation, either express or implied, with respect to the FILES or accompanying documentation, including its quality, performance, merchantability, or fitness for a particular purpose. The FILES and documentation are provided "as is" and the USER assumes the entire risk as to its quality and performance. Those parties involved with the development and distribution of this data will not be liable for any direct, indirect, special, incidental, or consequential damages arising out of the use or inability to use the FILES or any accompanying documentation.
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Metadata_Reference_Information:
Metadata_Date:201304
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:Pennsylvania Spatial Data Access (PASDA)
Contact_Address:
Address_Type:mailing and physical address
Address:
115 Land and Water building
City:University Park
State_or_Province:Pennsylvania
Postal_Code:16802
Country:United States
Contact_Voice_Telephone:(814) 865 - 8792
Contact_Electronic_Mail_Address:pasda@psu.edu
Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
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