USGS_PA_AllentownOrthoLidar_1_D24; Intensity Imagery
Identification_Information:
Citation:
Citation_Information:
Originator:NV5 Geospatial
Publication_Date:20250314
Title:
USGS_PA_AllentownOrthoLidar_1_D24; Intensity Imagery
Geospatial_Data_Presentation_Form:Raster digital data
Description:
Abstract: 
       Product: USGS_PA_AllentownOrthoLidar_1_D24 Intensity Imagery.
       Geographic Extent: 1 counties in Pennsylvania, covering approximately 28 total square miles.
       Dataset Description: The USGS_PA_AllentownOrthoLidar_1_D24 project called for the planning, acquisition, processing, and derivative products of lidar data to be collected at a nominal pulse spacing (NPS) of 0.35 meters. Project specifications are based on the U.S. Geological Survey National Geospatial Program Base LiDAR Specification, 2023 Rev. A. The data were developed based on a horizontal projection/datum of NAD 1983 2011 StatePlane Pennsylvania South FIPS 3702 Ft US, Foot US and vertical datum of NAVD88 Geoid 18, Foot US. LiDAR data were delivered as processed Classified LAS 1.4 files formatted to 129 individual 2500 ft x 2500 ft tiles, as tiled intensity imagery, and as tiled bare earth DEMs; all tiled to the same 2500 ft x 2500 ft schema. Continuous breaklines were produced in Esri file geodatabase format.
       Ground Conditions: LiDAR was collected in fall 2024, 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, NV5 Geospatial utilized a total of 5 ground control points that were used to calibrate the LiDAR to known ground locations established throughout the project area. An additional 65 independent accuracy checkpoints, 33 in Bare Earth and Urban landcovers (33 NVA points), 32 in Tall Weeds categories (32 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 1 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: 
 Raster File Type = GeoTIFF; Bit Depth/Pixel Type = 8-bit, 256 color gray scale; Raster Cell Size = 1 foot; Intensity Values Normalized To = 16-bit, linear re-scaling
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date:20241125
Ending_Date:20241207
Currentness_Reference: 
Ground condition
Status:
Progress:Complete
Maintenance_and_Update_Frequency:None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate:-75.5583413201
East_Bounding_Coordinate:-75.4111200121
North_Bounding_Coordinate:40.6439142163
South_Bounding_Coordinate:40.5450578387
Keywords:
Theme:
Theme_Keyword_Thesaurus:None
Theme_Keyword:Intensity Images
Theme_Keyword:Elevation Data
Theme_Keyword:Lidar
Place:
Place_Keyword_Thesaurus:None
Place_Keyword:Pennsylvania
Place_Keyword:Lehigh 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.
Back to Top
Data_Quality_Information:
Logical_Consistency_Report: 
Data cover the entire area specified for this project.
Completeness_Report: 
A visual qualitative assessment was performed to ensure data completeness. No void areas or missing data exist.
Lineage:
Process_Step:
Process_Description: 
Intensity Image Generation Processing: GeoCue software was used to create the deliverable intensity images. All withheld points were ignored during this process. This helps to ensure a more aesthetically pleasing image. The GeoCue software was then used to verify full project coverage as well. GeoTIFF files were then provided as the deliverable for this dataset requirement.
Process_Date:2025
Back to Top
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method:Raster
Raster_Object_Information:
Raster_Object_Type:Pixel
Row_Count:2500
Column_Count:2500
Back to Top
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:1.0
Ordinate_Resolution:1.0
Planar_Distance_Units:Foot US
Geodetic_Model:
Horizontal_Datum_Name:North American Datum of 1983 (2011)
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 Geoid 18
Altitude_Resolution:0.001
Altitude_Distance_Units:Foot US
Altitude_Encoding_Method:Explicit elevation coordinate included with horizontal coordinates
Back to Top
Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_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.
Back to Top
Metadata_Reference_Information:
Metadata_Date:20250314
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:NV5 Geospatial
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.
Back to Top