USGS QL2 LiDAR for , PA 2018 [Pennsylvania--Columbia County] {2017} Full Details

Full Details

Title:

USGS QL2 LiDAR for , PA 2018 [Pennsylvania--Columbia County] {2017}

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.

Creator:

Geological Survey (U.S.)

Provider:

Pennsylvania Spatial Data Access (PASDA)

Resource Class:

Datasets

Resource Type:

Vector data

Theme:

Imagery and Land Cover

Date Issued:

2017

Place:

Pennsylvania, Pennsylvania--Adams County, Pennsylvania--Columbia County, Pennsylvania--Cumberland County, Pennsylvania--Franklin County, Pennsylvania--Juniata County, Pennsylvania--Lebanon County, Pennsylvania--Lycoming County, Pennsylvania--Mifflin County, Pennsylvania--Montour County, Pennsylvania--Northumberland County, Pennsylvania--Perry County, Pennsylvania--Snyder County, Pennsylvania--Union County

Access Rights:

Public

Format:

File

Language:

English

Date Added:

2023-02-22