Lake Erie Watershed 2012 Lidar - las 1.2

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Distributor 1
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator:Pennsylvania Sea Grant

Publication_Date:201212

Publication_Time:Unknown

Title:

Lake Erie Watershed 2012 Lidar - las 1.2

Geospatial_Data_Presentation_Form:point digital data

Online_Linkage: http://www.paseagrant.org/

Description:

Abstract:

Lake Erie Watershed 2012 Lidar
Woolpert Project Number: 72835

2012 Lake Erie Drainage Area (Erie, PA) Digital Orthoimagery/LiDAR Project - In the fall of 2012, Woolpert obtained new aerial LiDAR covering the entire project area (512 square miles). The aerial LiDAR was acquired at a point density average of 1-meter with final products comprised of LAS (ground and above ground points). The aerial LiDAR was collected during leaf-off conditions during the fall 2012 flying season (November).  The LiDAR is being delivered as a project area wide dataset, consisting of 2,500' x 2,500' tiles (which matches the ortho tiling system).  Adjacent flight lines overlap by an average of 30 percent. LiDAR was collected with Leica ALS LiDAR Systems. The file naming convention is as follows: xxxyyy (Pennsylvania North Zone); Please note that xxx and yyy represent the easting and northing coordinates (respectively) in state plane feet. Each LiDAR file is approximately 40 megabytes in size. Ownership of the data products resides with Penn State and the Pennsylvania Department of Environmental Protection. 

The LiDAR data will be utilized for the rectification of aerial imagery to produce 1”=100’ scale ortho-imagery with a 6-inch pixel resolution.  The LiDAR data will also be used as a component during the future delineation of project area wide impervious surfaces (using remote sensing techniques).

FINAL DELIVERABLES:
The final deliverables are listed below. The final LiDAR data was delivered in a State Plane projection tiling format, based on a modular layout. The tiles were clipped to eliminate overlap between adjacent tiles.
The 2500 feet x 2500 feet tile file name was derived from the lower left coordinates of each tile.
• LAS v1.2 classified point cloud NAD83 (NSRS2007) Pennsylvania State Plane North Zone U.S. Feet, NAVD88 GEOID09 U.S. Feet.
• Tile data extent provided as ESRI v10.0 shapefile.
• Control data provided as ESRI v10.0 shapefile.
• FGDC compliant metadata by file in XML format.
• LiDAR processing report in pdf format.

Purpose:

2012 Lake Erie Drainage Area (Erie, PA) Digital Orthoimagery/LiDAR Project - In the fall of 2012, Woolpert obtained new aerial LiDAR covering the entire project area (512 square miles). The aerial LiDAR was acquired at a point density average of 1-meter with final products comprised of LAS (ground and above ground points). The aerial LiDAR was collected during leaf-off conditions during the fall 2012 flying season (November). The LiDAR is being delivered as a project area wide dataset, consisting of 2,500' x 2,500' tiles (which matches the ortho tiling system). Adjacent flight lines overlap by an average of 30 percent. LiDAR was collected with Leica ALS LiDAR Systems. The file naming convention is as follows: xxxyyy (Pennsylvania North Zone); Please note that xxx and yyy represent the easting and northing coordinates (respectively) in state plane feet. Each LiDAR file is approximately 40 megabytes in size. Ownership of the data products resides with Penn State and the Pennsylvania Department of Environmental Protection. The LiDAR data will be utilized for the rectification of aerial imagery to produce 1”=100’ scale ortho-imagery with a 6-inch pixel resolution. The LiDAR data will also be used as a component during the future delineation of project area wide impervious surfaces (using remote sensing techniques).

Time_Period_of_Content:

Time_Period_Information:

Multiple_Dates/Times:

Single_Date/Time:

Calendar_Date:20121111

Time of Day:unknown

Single_Date/Time:

Calendar_Date:20121118

Time of Day:unknown

Currentness_Reference:

ground condition

Status:

Progress:Complete

Maintenance_and_Update_Frequency:As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate:-80.530849

East_Bounding_Coordinate:-79.754820

North_Bounding_Coordinate:42.276330

South_Bounding_Coordinate:41.652700

Keywords:

Theme:

Theme_Keyword_Thesaurus:ISO 19115 Topic Categories

Theme_Keyword:LiDAR

Theme_Keyword:LAS

Theme_Keyword:imageryBaseMapsEarthCover

Place:

Place_Keyword_Thesaurus:None

Place_Keyword:United States

Place_Keyword:Pennsylvania

Place_Keyword:Erie

Access_Constraints:No restrictions apply to this data.

Use_Constraints:

No restrictions apply to this data.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:Pennsylvania Sea Grant - Penn State University

Contact_Person:Sean D. Rafferty

Contact_Position:Senior Research and Outreach Specialist

Contact_Address:

Address_Type:mailing and physical address

Address:

Tom Ridge Environmental Center

Address:

301 Peninsula Dr., Suite 3

City:Erie

State_or_Province:Pennsylvania

Postal_Code:16505

Country:USA

Contact_Voice_Telephone:814-217-9011 ext 102

Contact_Electronic_Mail_Address:sdr138@psu.edu

Hours_of_Service:unknown

Native_Data_Set_Environment:

Microsoft Windows Vista Version 6.1 (Build 7600) ; TerraSolid LTD: Terrascan Version 12.05

Data_Quality_Information:

Logical_Consistency_Report:

The data is visually inspected by Woolpert, Inc.

Completeness_Report:

Complete

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Horizontal accuracy is +/- 1.42 U.S. Feet at the 95% confidence level.

Quantitative_Horizontal_Positional_Accuracy_Assessment:

Horizontal_Positional_Accuracy_Value:1.42 U.S. Feet

Horizontal_Positional_Accuracy_Explanation:

LiDAR system calibration is available upon request from Woolpert, Inc.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

The LAS data for the LiDAR Acquisition for Lake Erie Drainage Basin was compared to survey control points to determine the FVA of the Bare-Earth DEM.
Bare-Earth DEM Fundamental Vertical Accuracy (FVA) Tested 0.158 U.S. Feet fundamental
vertical accuracy at a 95 percent confidence level, derived according to NSSDA, in open
terrain using 0.081 U.S. Feet (RMSEz x 1.96000, tested against the DEM.

Quantitative_Vertical_Positional_Accuracy_Assessment:

Vertical_Positional_Accuracy_Value:0.158 U.S. Feet

Vertical_Positional_Accuracy_Explanation:

Bare-Earth DEM Fundamental Vertical Accuracy (FVA) Tested 0.158 U.S. Feet fundamental
vertical accuracy at a 95 percent confidence level, derived according to NSSDA, in open
terrain using 0.081 U.S. Feet(RMSEz x 1.96000, tested against the DEM.

Lineage:

Process_Step:

Process_Description:

Using a Leica ALS 70 LiDAR Sensor, 40 flight lines of high density data, at a nominal pulse spacing (NPS) of 1 meter, were collected over the Lake Erie Drainage Basin AOI (approximately  512.4 square miles). Data Acquisition Height = 7,800 feet AGL - Aircraft Speed = 150 Knots. Multiple returns were recorded for each laser pulse along with an intensity value for each return. A total of two (2) missions were flown on November 11, 2012 and November 18, 2012. An airborne global positioning system (GPS) base station was used in support of the LiDAR data acquisition. Twenty-Nine (29) ground control points were surveyed through static methods. The geoid used to reduce satellite derived elevations to orthometric heights was Geoid09. Data for the task order is referenced to the Pennsylvania North Zone State Plane Coordinate System, North American Datum of 1983 (NAD83)(NSRS2007), and NAVD88, in U.S. Feet. Airborne GPS data was differentially processed and integrated with the post processed IMU data to derive a smoothed best estimate of trajectory (SBET). The SBET was used to reduce the LiDAR slant range measurements to a raw reflective surface for each flight line. The coverage was classified to extract a bare earth digital elevation model (DEM) and separate last returns. 

Process_Date:20121119

Process_Time:1200

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:Woolpert, Inc.

Contact_Position:Geospatial Services

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

Process_Step:

Process_Description:

The LiDAR system calibration and system performance is verified on a periodic basis using Woolpert's calibration range. The calibration range consists of a large building and runway. The edges of the building and control points along the runway have been located using conventional survey methods. Inertial measurement unit (IMU) misalignment angles and horizontal accuracy are
calculated by comparing the position of the building edges between opposing flight lines. The scanner scale factor and vertical accuracy is calculated through comparison of LiDAR data against control points along the runway. Field calibration is performed on all flight lines to refine the IMU misalignment angles. IMU misalignment angles are calculated from the relative displacement of features within the overlap region of adjacent (and opposing) flight lines. The raw LiDAR data is reduced using the refined misalignment angles.

Process_Date:2012

Process_Time:1200

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:Woolpert, Inc.

Contact_Position:Geospatial Services

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

Process_Step:

Process_Description:

Once the data acquisition and GPS processing phases are complete, the LiDAR data was processed immediately to verify the coverage had no voids. The GPS and IMU data was post processed using differential and Kalman filter algorithms to derive a best estimate of trajectory. The quality of the solution was verified to be consistent with the accuracy requirements of the project.

Process_Date:20121112

Process_Time:1200

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:Woolpert, Inc.

Contact_Position:Geospatial Services

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

Process_Step:

Process_Description:

The individual flight lines were inspected to ensure the systematic and residual errors have been identified and removed. Then, the flight lines were compared to adjacent flight lines for any mismatches to obtain a homogenous coverage throughout the project area. The point cloud underwent a classification process to determine bare-earth points and non-ground points utilizing "first and only" as well as "last of many" LiDAR returns. This process determined Default (Class 1), Ground (Class 2),Noise (Class 7), Overlap Default(Class 17), and Overlap Ground (Class 18) classifications. The bare-earth (Class 2 - Ground) LiDAR points underwent a manual QA/QC step to verify that artifacts have been removed from the bare-earth surface. The surveyed ground control points are used to perform the accuracy checks and statistical analysis of the LiDAR dataset.

Process_Date:20121119

Process_Time:1200

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:Woolpert, Inc.

Contact_Position:Geospatial Services

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

Cloud_Cover:0

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method:Point

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name:State Plane Coordinate System

State_Plane_Coordinate_System:

SPCS_Zone_Identifier:Pennsylvania North FIPS 3701

Lambert_Conformal_Conic:

Standard_Parallel:40.88333333

Standard_Parallel:41.95000000

Longitude_of_Central_Meridian:-77.75000000

Latitude_of_Projection_Origin:40.16666667

False_Easting:1968500.00000000

False_Northing:0.00000000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method:coordinate pair

Coordinate_Representation:

Abscissa_Resolution:1.0

Ordinate_Resolution:1.0

Planar_Distance_Units:U.S. Feet

Geodetic_Model:

Horizontal_Datum_Name:North American Datum 1983

Ellipsoid_Name:Geodetic Reference System 80

Semi-major_Axis:6378137.000000

Denominator_of_Flattening_Ratio:298.257222

Vertical_Coordinate_System_Definition:

Altitude_System_Definition:

Altitude_Datum_Name:North American Vertical Datum of 1988

Altitude_Resolution:0.000100

Altitude_Distance_Units:U.S. Feet

Altitude_Encoding_Method:Explicit elevation coordinate included with horizontal coordinates

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label:Lake Erie Watershed LiDAR 2012

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:Pennsylvania Department of Environmental Protection

Contact_Address:

Address_Type:mailing and physical address

Address:

230 Chestnut Street

City:Meadville

State_or_Province:PA

Postal_Code:16335

Country:USA

Contact_Voice_Telephone:unknown

Resource_Description:Downloadable Data

Distribution_Liability:

Woolpert prepared the original data as set forth in the Scope of Services, in accordance with reasonable care and due diligence as set forth in this Agreement, however, due to the easily alterable nature of electronic media, files, documents, and other deliverables, Woolpert, Inc. makes no warranties, either expressed or implied, with respect to the accuracy, completeness, merchantability, or fitness for any particular purpose, including, but not limited to, use of any/all data as described within this metadata file, by any user of this data. Any use will be at the end-user’s sole risk.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name:LAS

Format_Version_Number:1.2

Format_Specification:

ASPRS

File_Decompression_Technique:no compression applied

Digital_Transfer_Option:

Offline_Option:

Offline_Media:Digital

Recording_Format:Digital

Fees:None.

Available_Time_Period:

Time_Period_Information:

Single_Date/Time:

Calendar_Date:unknown

Time of Day:unknown

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:2014

Metadata_Contact:

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:USA

Contact_Voice_Telephone:(814) 865 - 8792

Contact_Electronic_Mail_Address:pasda@psu.edu

Metadata_Standard_Name:FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version:FGDC-STD-001-1998

Metadata_Time_Convention:local time

Metadata_Security_Information:

Metadata_Security_Classification_System:Unclassified

Metadata_Security_Classification:Unclassified

Metadata_Security_Handling_Description:

Unclassified

Metadata_Extensions:

Online_Linkage: http://www.esri.com/metadata/esriprof80.html

Profile_Name:ESRI Metadata Profile