South Central Pennsylvania 2017 QL2 LiDAR

Geographic Extent: 13 counties in Pennsylvania, covering approximately 6,602 total square miles. Dataset Description: The South Central Pennsylvania 2017 QL2 LiDAR project called for the planning, acquisition, processing, and derivative products of lidar data to be collected at a nominal pulse spacing (NPS) of 0.7 meters. Project specifications are based on the U.S. Geological Survey National Geospatial Program Base LiDAR Specification, Version 1.2. The data were developed based on a horizontal projection/datum of NAD 1983 (2011), UTM Zone 18, meters and vertical datum of NAVD 1988 (GEOID 12B), meters. LiDAR data were delivered as processed Classified LAS 1.4 files formatted to 7,975 individual 1,500-meter x 1,500-meter tiles, as tiled intensity imagery, and as tiled bare earth DEMs; all tiled to the same 1,500-meter x 1,500-meter schema. Continuous breaklines were produced in Esri file geodatabase format. Ground Conditions: LiDAR was collected in fall 2017, 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 150 ground control points that were used to calibrate the LiDAR to known ground locations established throughout the project area. An additional 245 independent accuracy checkpoints, 142 in Bare Earth and Urban landcovers (142 NVA points), 103 in Tall Weeds categories (103 VVA points), were used to assess the vertical accuracy of the data. These checkpoints were not used to calibrate or post process the data.

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Field	Value
access_constraints	["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be aware that temporal changes may have occurred since this dataset was collected and that some parts of these data may no longer represent actual surface conditions.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.", "Access Constraints: No restrictions apply to these data."]
bbox-east-long	-76.15029659
bbox-north-lat	41.59758202
bbox-south-lat	39.71890736
bbox-west-long	-78.10056682
coupled-resource	[]
dataset-reference-date	[{"type": "publication", "value": "2018-10-26"}]
frequency-of-update	notPlanned
licence	["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."]
metadata-date	2018-10-26
metadata-language	eng; USA
metadata_type	geospatial
progress	completed
resource-type	dataset
responsible-party	[{"name": "Quantum Spatial, Inc.", "roles": ["pointOfContact"]}]
spatial	{"type": "Polygon", "coordinates": [[[-78.10056682, 39.71890736], [-76.15029659, 39.71890736], [-76.15029659, 41.59758202], [-78.10056682, 41.59758202], [-78.10056682, 39.71890736]]]}
spatial_harvester	true
temporal-extent-begin	2017-11-21
temporal-extent-end	2017-12-21
Groups	AmeriGEOSS National Provider North America
Tags	adams-county amerigeo amerigeoss ckan columbia-county cumberland-county franklin-county geo geoss juniata-county lebanon-county lycoming-county mifflin-county montour-county national north-america northumberland-county pennsylvania perry-county snyder-county union-county united-states
isopen	False
metadata_created	2025-11-23T00:45:01.868119
metadata_modified	2025-11-23T00:45:01.868122
notes	Geographic Extent: 13 counties in Pennsylvania, covering approximately 6,602 total square miles. Dataset Description: The South Central Pennsylvania 2017 QL2 LiDAR project called for the planning, acquisition, processing, and derivative products of lidar data to be collected at a nominal pulse spacing (NPS) of 0.7 meters. Project specifications are based on the U.S. Geological Survey National Geospatial Program Base LiDAR Specification, Version 1.2. The data were developed based on a horizontal projection/datum of NAD 1983 (2011), UTM Zone 18, meters and vertical datum of NAVD 1988 (GEOID 12B), meters. LiDAR data were delivered as processed Classified LAS 1.4 files formatted to 7,975 individual 1,500-meter x 1,500-meter tiles, as tiled intensity imagery, and as tiled bare earth DEMs; all tiled to the same 1,500-meter x 1,500-meter schema. Continuous breaklines were produced in Esri file geodatabase format. Ground Conditions: LiDAR was collected in fall 2017, 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 150 ground control points that were used to calibrate the LiDAR to known ground locations established throughout the project area. An additional 245 independent accuracy checkpoints, 142 in Bare Earth and Urban landcovers (142 NVA points), 103 in Tall Weeds categories (103 VVA points), were used to assess the vertical accuracy of the data. These checkpoints were not used to calibrate or post process the data.
num_resources	1
num_tags	22
title	South Central Pennsylvania 2017 QL2 LiDAR