Western Lidar 2020 QL2; DEM - North [Pennsylvania] {2020} Full Details

Full Details

Title:

Western Lidar 2020 QL2; DEM - North [Pennsylvania] {2020}

Description:

These are Digital Elevation Model (DEM) data for Pennsylvania as part of the required deliverables for the PA_WesternPA_2019_D20 Lidar QL2 project. Class 2 (ground) LiDAR points in conjunction with the hydro breaklines were used to create a 2.5 foot hydro-flattened Raster DEM. Geographic Extent: 22 counties in Pennsylvania, covering approximately 6282 total square miles. Dataset Description: The PA_WesternPA_2019_D20 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 2.1. The data were developed based on a horizontal projection/datum of NAD 1983 2011 StatePlane Pennsylvania North FIPS 3701 Ft US, Foot US and vertical datum of NAVD88 Geoid 12b, Foot US. LiDAR data were delivered as processed Classified LAS 1.4 files formatted to 7229 individual 5,000 ft x 5,000 ft tiles, and as tiled intensity imagery and tiled bare earth DEMs formatted to 1848 individual 10,000 ft x 10,000 ft tiles. Continuous breaklines were produced in Esri file geodatabase format. Ground Conditions: LiDAR was collected in fall 2019 and spring 2020, 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, powered by Quantum Spatial utilized a total of 274 ground control points that were used to calibrate the LiDAR to known ground locations established throughout the project area. An additional 485 independent accuracy checkpoints, 291 in Bare Earth and Urban landcovers (291 NVA points), 194 in Tall Weeds categories (194 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:

Imagery

Resource Type:

Raster data

Theme:

Elevation

Date Issued:

2020

Place:

Pennsylvania, Pennsylvania--Armstrong County, Ashtabula County, Pennsylvania--Blair County, Pennsylvania--Butler County, Pennsylvania--Cambria County, Cattaraugus County, Chautauqua County, Pennsylvania--Clarion County, Pennsylvania--Clearfield County, Pennsylvania--Crawford County, Pennsylvania--Elk County, Pennsylvania--Erie County, Pennsylvania--Forest County, Pennsylvania--Indiana County, Pennsylvania--Jefferson County, Pennsylvania--Lawrence County, Mahoning County, Pennsylvania--Mckean County, Pennsylvania--Mercer County, Trumbull County, Pennsylvania--Venango County, Pennsylvania--Warren County

Access Rights:

Public

Format:

File

Language:

English

Date Added:

2023-02-22