WVSA, PA – 2017 Impervious Surface; Hydro Flattened Breaklines

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator:Woolpert

Publication_Date:20180228

Title:

WVSA, PA – 2017 Impervious Surface; Hydro Flattened Breaklines

Geospatial_Data_Presentation_Form:Vector data

Description:

Abstract:

Breakline data is used to hydroflatten the DEMs created for the WVSA, PA 2017 Lidar project project. Breaklines are reviewed against lidar intensity imagery to verify completeness of capture. The compilation procedure included use of lidar intensity, bare earth surface model, point cloud data, and open source imagery in an effort to manually compile hydrologic features in a 2-d environment. Following the compilation phase, a separate process was used to adjust the breakline data to best match the water level at the time of the lidar collection. Any ponds and/or lakes were adjusted to be at or just below the bank and to be at a constant elevation. Any streams were adjusted to be at or just below the bank and to be monotonic. Manual QAQC and peer-based QC review was performed on all delineated data to ensure horizontal placement quality and on all adjusted data to ensure vertical placement quality. Bridge breaklines were also compiled in efforts to generate an accurate DEM product. The final hydrologic and bridge breakline product was delivered in ESRI geodatabase format and was also used in the processing of the DEM deliverable
 Geographic Extent: This task order requires lidar data to be acquired over an AOI surrounding Wilkes-Barre, PA (+/- 401.5 square miles)
Dataset Description: WVSA, PA – 2017 Impervious Surface 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 meter. Project specifications are based on the U.S. Geological Survey National Geospatial Program Base Lidar Specification, Version 1.2. The data was developed based on a horizontal projection/datum of NAD83(2011) State Plane Pennsylvania North FIPS3701 Ft US. The vertical datum of NAVD88 Geoid12B Ft US. Lidar data was delivered as flightline-extent unclassified LAS swaths, as processed Classified LAS 1.4 files, formatted to 1792 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.
   Ground Conditions: Lidar was collected between November 23, 2017 and December 8, 2017 by Woolpert, 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, Woolpert established 35 ground control points that were used to calibrate the lidar to known ground locations established throughout the project area. Additional independent accuracy checkpoints were collected (35 NVA points and 23 VVA points) and used to assess the vertical accuracy of the data. These checkpoints were not used to calibrate or post process the data.

Purpose:

T3 Global Strategies has a goal to develop orthophotography, lidar, and impervious surface datasets to support a project with Wyoming Valley Sanitary Authority (WVSA).

Supplemental_Information:

Breakline File Type = GDB Breakline Elevation Units = Survey Feey Downhill Treatment Applied = Monotonic Type of Hydro Treatment Required = Hydro-flattened

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date:20171123

Ending_Date:20171208

Currentness_Reference:

ground condition

Status:

Progress:Complete

Maintenance_and_Update_Frequency:None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate:-76.147268011

East_Bounding_Coordinate:-75.611667141

North_Bounding_Coordinate:41.417930109

South_Bounding_Coordinate:41.121224352

Keywords:

Theme:

Theme_Keyword_Thesaurus:None

Theme_Keyword:Breaklines

Theme_Keyword:Elevation Data

Theme_Keyword:Lidar

Place:

Place_Keyword_Thesaurus:None

Place_Keyword:United States

Place_Keyword:Pennsylvania

Place_Keyword:Luzerne County

Place_Keyword:Lackawanna County

Place_Keyword:Wyoming County

Place_Keyword:Wilkes-Barre

Access_Constraints:No restrictions apply to this data.

Use_Constraints:

The information contained in these data is dynamic and may change over time. The data are not better than the original sources from which they were derived. It is the responsibility of the data user to use the data appropriately and within the limitations of the data for which it was requested and prepared, in general, and these data in particular. The related graphics are intended to aid the data user in acquiring relevant data. It is not appropriate to use the related graphics as data. Woolpert gives no warranty, expressed or implied, as to the accuracy, reliability, or completeness of these data. It is strongly recommended that these data are directly acquired from a Woolpert server, and not indirectly through other sources which may have changed the data in some way. Although these data have been processed successfully upon Woolpert’s computer system, no warranty, expressed or implied, is made regarding the utility of the data on another system, or for general or scientific purposes; nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data and aggregate use with other data.

Data_Quality_Information:

Logical_Consistency_Report:

Data covers the entire area specified for this project. Breaklines were collected in all inland ponds and lakes ~2 acres or greater. These features were flat and level water bodies at a single elevation for each vertex along the bank. The entire water surface edge is at or below the immediate surrounding terrain. Breaklines were collected for all streams and rivers ~100' nominal width or wider. These features are flat and level bank to bank, gradient will follow the surrounding terrain and the water surface will be at or below the surrounding terrain. Streams/river channels will break at culvert locations however not at elevated bridge locations.

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:

Hydro Flattening Breakline Processing: Class 2 (ground) lidar points was used to create a bare earth surface model. The compilation procedure included use of lidar intensity, bare earth surface model, point cloud data, and open source imagery in an effort to compile hydrologic features in a 2-d environment. Elevation values were assigned to all inland Ponds and Lakes, Inland Pond and Lake Islands, Inland Stream and River Islands, using TerraModeler/LP360 functionality. All ground (Class 2) lidar data inside of the collected inland breaklines were then classified to water (Class 9) using TerraScan macro functionality. A buffer of 0.7 meters was also used around each hydro-flattened feature. These points were moved from ground (Class 2) to Ignored Ground (Class 10). Breaklines are reviewed against lidar intensity imagery and surface models to verify completeness of capture. The horizontal placement of breaklines is compared to terrain features and the breakline elevations are compared to lidar elevations to ensure all breaklines match the lidar within acceptable tolerances. Some deviation is expected between breakline and lidar elevations due to monotonicity, connectivity, and flattening rules that are enforced on the breaklines. Once completeness, horizontal placement, and vertical variance is reviewed, all breaklines are reviewed for topological consistency and data integrity using a combination of ESRI Data Reviewer tools.

Source_Used_Citation_Abbreviation:

Lidar deliverables

Process_Date:20171123

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method:Vector

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:3701

Lambert_Conformal_Conic:

Standard_Parallel:40.8833333333

Standard_Parallel:41.95

Longitude_of_Central_Meridian:-77.75

Latitude_of_Projection_Origin:40.1666666667

False_Easting:1968500.0

False_Northing:0.0

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method:coordinate pair

Coordinate_Representation:

Abscissa_Resolution:0.1

Ordinate_Resolution:0.1

Planar_Distance_Units:Ft US

Geodetic_Model:

Horizontal_Datum_Name:D_NAD_1983_2011

Ellipsoid_Name:GRS_1980

Semi-major_Axis:6378137.0

Denominator_of_Flattening_Ratio:298.257222101

Vertical_Coordinate_System_Definition:

Altitude_System_Definition:

Altitude_Datum_Name:North American Vertical Datum of 1988(GEOID12B)

Altitude_Resolution:0.01

Altitude_Distance_Units:Ft US

Altitude_Encoding_Method:Explicit elevation coordinate included with horizontal coordinates

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.

Metadata_Reference_Information:

Metadata_Date:20180228

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:Woolpert

Contact_Address:

Address_Type:mailing and physical address

Address:

4454 Idea Center Blvd.

City:Dayton

State_or_Province:OH

Postal_Code:45430

Country:USA

Contact_Voice_Telephone:(937) 461-5660

Contact_Facsimile_Telephone:(937) 461-0743

Hours_of_Service:8:00 a.m. to 5:00 p.m. Eastern Time

Metadata_Standard_Name:FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version:FGDC-STD-001-1998

Metadata_Time_Convention:local time