Lake Erie Watershed - Erie PA, Impervious Surfaces Mapping
Identification_Information:
Citation:
Citation_Information:
Originator:Pennsylvania Sea Grant
Publication_Date:2012
Title:
Lake Erie Watershed - Erie PA, Impervious Surfaces Mapping
Geospatial_Data_Presentation_Form:vector digital data
Online_Linkage: http://www.paseagrant.org/
Description:
Abstract: 
Woolpert's automated land cover feature extraction processes was used to perform impervious surface delineation. Woolpert utilized commercial off-the-shelf (COTS) remote sensing software, proprietary software and applications to perform automated feature analysis incorporating imagery, LiDAR and other ancillary vector data. The automated processes replace the need to manually digitize features.
Purpose: 
Impervious surfaces data is used for modelling the sources and amount run-off into Lake Erie.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date:2012
Currentness_Reference: 
publication date
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:Imagery
Theme_Keyword:LIDAR
Theme_Keyword:Impervious Surfaces Mapping
Theme:
Theme_Keyword_Thesaurus:ISO 19115 Topic Categories
Theme_Keyword:Building Components
Theme_Keyword:Individual elements of impervious surfaces captured as separate features
Theme_Keyword:imageryBaseMapsEarthCover
Place:
Place_Keyword_Thesaurus:None
Place_Keyword:United States
Place_Keyword:Pennsylvania
Place_Keyword:Erie
Temporal:
Temporal_Keyword:November
Access_Constraints:No restrictions apply to this data.
Use_Constraints: 
None.  However, users should be aware that temporal changes may have occurred since this data set was collected and some parts of this data may no longer represent actual surface conditions.  Users should not use this data for critical applications without a full awareness of it's limitations.
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
Data_Set_Credit: 
n/a
Security_Information:
Security_Classification_System:Unclassified
Security_Classification:Unclassified
Security_Handling_Description:Unclassified
Native_Data_Set_Environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.722
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Data_Quality_Information:
Logical_Consistency_Report: 
The data is visually inspected by Woolpert, Inc.
Completeness_Report: 
Lake Erie Watershed Impervious Surfaces Mapping.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report: 
Horizontal accuracy is +/- 2.5 -foot at the 90% confidence level.
Quantitative_Horizontal_Positional_Accuracy_Assessment:
Horizontal_Positional_Accuracy_Value:n/a
Horizontal_Positional_Accuracy_Explanation: 
n/a
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report: 
n/a
Quantitative_Vertical_Positional_Accuracy_Assessment:
Vertical_Positional_Accuracy_Value:n/a
Vertical_Positional_Accuracy_Explanation: 
n/a
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator:PSU
Publication_Date:20140124
Publication_Time:Unknown
Title:
PSU
Geospatial_Data_Presentation_Form:vector digital data
Source_Scale_Denominator:n/a
Type_of_Source_Media:disc
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date:November 2012
Time of Day:unknown
Source_Currentness_Reference:
ground condition
Source_Citation_Abbreviation:
impervious surfaces polygons
Source_Contribution: 
Lidar amd orthophotography
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_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 homogeneous 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
Process_Step:
Process_Description: 
To produce the color digital orthophotos with a 0.5 foot pixel GSD, Woolpert obtained aerial photography according to the following specifications:
Camera: Leica ADS80-SH81/82 Airborne Digital Sensor
Flying Height: 4,800' AGL for a nominal 0.5 foot pixel GSD
Imagery Type: RGB+NIR
Side Lap: 30%
The imagery was acquired using the Leica ADS80-SH81/82 multispectral scanner. The fundamental resolution of the imagery was 0.5 foot. The ADS80-SH81/82 utilizes the Applanix POSAV direct positioning and orientation system that is based on airborne GPS and inertial measurement unit (IMU) technology. POSAV data were reduced using the Applanix POSPAC software package (V4.3). All of the source imagery was processed using the Leica GPRO (V3.2) software package. This package provides the capability to perform digital mage processing, aerial triangulation, and image rectification. The strips of imagery were ortho rectified to existing digtial elevation model (DEM) data. The individual rectified strips of ortho rectified imagery were then mosaicked together to form a seamless imagery database over the entire task order area using the OrthoVista software (V4.3) by Inpho GmbH. The final digital orthophoto imagery tiles were extracted using OrthoVista.
Process_Date:Unknown
Process_Time:1200
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:Woolpert, Inc.
Contact_Person: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: 
To produce a map that details the location and extent of impervious surfaces throughout the Erie Watershed project area.  The process of impervious surfaces delineation began with object-based image analysis and automated feature extraction.  Object-based image analysis was performed on the 4 band orthophotography (red, green, blue and near infra-red).  This image analysis produced rough and generalized polygons that showed the extent of impervious surfaces.  These polygons were then augmented by Lidar through the process of automated feature extraction. The generalized polygons were then smoothed and analyzed in order to ensure they meet and/or exceed the set positional accuracy of +/- 2.5 feet as well as an overall classification accuracy of 90% consistent with NSSDA/NMAS specifications. 95% of impervious features larger than 100 square feet were and 98% of impervious object larger than 200 square feet were captured.  The final polygons were delivered as a ESRI file geodatabase (version 10.1).
Process_Date:Unknown
Process_Time:1200
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:Woolpert, Inc.
Contact_Person: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
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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: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:row and column
Coordinate_Representation:
Abscissa_Resolution:0.50000
Ordinate_Resolution:0.50000
Planar_Distance_Units:feet
Geodetic_Model:
Horizontal_Datum_Name:North American Datum of 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 HARN
Altitude_Resolution:.5
Altitude_Distance_Units:feet
Altitude_Encoding_Method:Explicit elevation coordinate included with horizontal coordinates
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Distribution_Information:
Distributor:
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
Resource_Description:Hard Drive
Distribution_Liability: 
No warranty expressed or implied is made regarding the utility or the data on any other system, nor shall the act of distribution constitute any such warranty
Standard_Order_Process:
Non-digital_Form:
ESRI Geodatabase on HD
Fees:None
Ordering_Instructions: 
Upon request from distributor.  Data release caveats may apply
Turnaround:Variable
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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.
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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
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