Pennsylvania North Central Lidar QL2; Contours


Identification_Information:
Citation:
Citation_Information:
Originator:Quantum Spatial, Inc.
Publication_Date:20210209
Title:
Pennsylvania North Central Lidar QL2; Contours
Geospatial_Data_Presentation_Form:Vector digital data
Description:
Abstract:
       Product: Contours with a 1 foot interval in Esri file geodatabase format.
       Geographic Extent: 34 counties in Pennsylvania, covering approximately 5621 total square miles.
       Dataset Description: The Pennsylvania North Central Lidar QL2 project called for the planning, acquisition, processing, and derivative products of lidar data to be collected at a nominal pulse spacing (NPS) of 0.71 meters. Project specifications are based on the U.S. Geological Survey National Geospatial Program Base LiDAR Specification, Version 1.3. The data were developed based on a horizontal projection/datum of NAD 1983 StatePlane Pennsylvania South FIPS 3702 Feet, Foot US and vertical datum of NAVD88 GEOID12B, Foot US. LiDAR data were delivered as processed Classified LAS 1.4 files formatted to 1651 individual 10,000 ft x 10,000 ft tiles, as tiled intensity imagery, and as tiled bare earth DEMs; all tiled to the same 10,000 ft x 10,000 ft schema. Continuous breaklines were produced in Esri file geodatabase format.
       Ground Conditions: LiDAR was collected in spring and fall 2019, while no snow was on the ground and rivers were at or below normal levels. In order to post process the LiDAR data to meet task order specifications and meet ASPRS vertical accuracy guidelines, Quantum Spatial, Inc. utilized a total of 326 ground control points that were used to calibrate the LiDAR to known ground locations established throughout the project area. An additional 546 independent accuracy checkpoints, 322 in Bare Earth and Urban landcovers (322 NVA points), 224 in Tall Weeds categories (224 VVA points), were used to assess the vertical accuracy of the data. These checkpoints were not used to calibrate or post process the data.
Purpose:
To acquire detailed surface elevation data for use in conservation planning, design, research, floodplain mapping, dam safety assessments and elevation modeling, etc. Classified LAS files are used to show the manually reviewed bare earth surface. This allows the user to create intensity images, breaklines and raster DEMs. The purpose of these LiDAR data was to produce high accuracy 3D hydro-flattened digital elevation models (DEMs) with a 2.5 foot cell size. These raw LiDAR point cloud data were used to create classified LiDAR LAS files, intensity images, 3D breaklines, and hydro-flattened DEMs as necessary.
Supplemental_Information:
Contract No. G16PC00016, Task Order No. 140G0219F0103; CONTRACTOR: Quantum Spatial, Inc.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date:20190323
Ending_Date:20191123
Currentness_Reference:
Ground condition
Status:
Progress:Complete
Maintenance_and_Update_Frequency:None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate:-78.8500205092
East_Bounding_Coordinate:-75.0269484431
North_Bounding_Coordinate:41.0352262157
South_Bounding_Coordinate:39.6727305013
Keywords:
Theme:
Theme_Keyword_Thesaurus:None
Theme_Keyword:Model
Theme_Keyword:Contours
Place:
Place_Keyword_Thesaurus:None
Place_Keyword:Pennsylvania
Place_Keyword:Allegany County
Place_Keyword:Bedford County
Place_Keyword:Berks County
Place_Keyword:Blair County
Place_Keyword:Bucks County
Place_Keyword:Cambria County
Place_Keyword:Carbon County
Place_Keyword:Cecil County
Place_Keyword:Centre County
Place_Keyword:Chester County
Place_Keyword:Clearfield County
Place_Keyword:Dauphin County
Place_Keyword:Franklin County
Place_Keyword:Fulton County
Place_Keyword:Harford County
Place_Keyword:Hunterdon County
Place_Keyword:Huntingdon County
Place_Keyword:Indiana County
Place_Keyword:Jefferson County
Place_Keyword:Juniata County
Place_Keyword:Lancaster County
Place_Keyword:Lebanon County
Place_Keyword:Lehigh County
Place_Keyword:Luzerne County
Place_Keyword:Mifflin County
Place_Keyword:Monroe County
Place_Keyword:Montgomery County
Place_Keyword:Northampton County
Place_Keyword:Schuylkill County
Place_Keyword:Somerset County
Place_Keyword:Union County
Place_Keyword:Warren County
Place_Keyword:Washington County
Place_Keyword:York County
Access_Constraints:No restrictions apply to these data.
Use_Constraints:
None. However, users should be aware that temporal changes may have occurred since this dataset was collected and that some parts of these data may no longer represent actual surface conditions. Users should not use these data for critical applications without a full awareness of their limitations. Acknowledgement of the organization providing these data to the public would be appreciated for products derived from these data.
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Data_Quality_Information:
Logical_Consistency_Report:
Data cover the entire area specified for this project.
Completeness_Report:
All files are inspected to ensure that they conform to the specified file naming conventions, all files load in their correct geographic position, all files conform to the project specifications for file standard and content.
Lineage:
Process_Step:
Process_Description:
Contour Processing: Using automated scripting routines within ArcMap, a terrain surface was created using the ground (ASPRS Class 2) LiDAR data as well as the hydro-flattened breaklines. This surface was then used to generate the final 1 foot contour dataset in Esri File Geodatabase format.
Process_Date:2021
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Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method:Vector
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Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name:State Plane Coordinate System 1983
State_Plane_Coordinate_System:
SPCS_Zone_Identifier:3702
Lambert_Conformal_Conic:
Standard_Parallel:39.9333333333
Standard_Parallel:40.9666666667
Longitude_of_Central_Meridian:-77
Latitude_of_Projection_Origin:39.3333333333
False_Easting:1968500
False_Northing:0.0
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method:coordinate pair
Coordinate_Representation:
Abscissa_Resolution:0.001
Ordinate_Resolution:0.001
Planar_Distance_Units:Foot US
Geodetic_Model:
Horizontal_Datum_Name:D North American 1983
Ellipsoid_Name:Geodetic Reference System 80
Semi-major_Axis:6378137.0
Denominator_of_Flattening_Ratio:298.257222101
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Datum_Name:NAVD88 GEOID12B
Altitude_Resolution:1.0
Altitude_Distance_Units:Foot US
Altitude_Encoding_Method:Explicit elevation coordinate included with horizontal coordinates
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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:20210209
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:Quantum Spatial, Inc.
Contact_Address:
Address_Type:mailing and physical
Address:
523 Wellington Way
City:Lexington
State_or_Province:KY
Postal_Code:40503
Country:USA
Contact_Voice_Telephone:859-277-8700
Contact_Facsimile_Telephone:859-277-8901
Hours_of_Service:Monday through Friday 8:00 AM to 5:00 PM (Eastern Time)
Metadata_Standard_Name:FGDC Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version:FGDC-STD-001-1998
Metadata_Access_Constraints:None.
Metadata_Use_Constraints:
None.
Metadata_Security_Information:
Metadata_Security_Classification_System:None.
Metadata_Security_Classification:Unclassified
Metadata_Security_Handling_Description:
NONE
Metadata_Extensions:
Online_Linkage: None.
Profile_Name:None.
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