PAMAP Program LiDAR Processing/Contour Enhancement Lines of Pennsylvania

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

Identification_Information:

Citation:

Citation_Information:

Originator:PAMAP Program, PA Department of Conservation and Natural Resources, Bureau of Topographic and Geologic Survey

Publication_Date:20061213

Title:

PAMAP Program LiDAR Processing/Contour Enhancement Lines of Pennsylvania

Geospatial_Data_Presentation_Form:vector digital data

Publication_Information:

Publication_Place:Middletown, PA

Publisher:PAMAP Program, PA Department of Conservation and Natural Resources, Bureau of Topographic and Geologic Survey

Online_Linkage: http://www.pasda.psu.edu/

Description:

Abstract:

This dataset, produced by the PAMAP Program, consists of vectors used to classify LiDAR points and aesthetically enhance contour lines. The vectors are commonly delineated along features such as road edges, railroads, bridge decks, double line hydro (20' wide and greater), lakes and ponds, swamps and marshes, and extreme terrain breaks (cliffs, retaining walls, etc.). PAMAP data are organized into blocks, which do not have gaps or overlaps, that represent 10,000 feet by 10,000 feet on the ground. The coordinate system for blocks in the northern half of the state is Pennsylvania State Plane North (datum:NAD83, units: feet); blocks in the southern half of the state are in Pennsylvania State Plane South. A block name is formed by concatenating the first four digits of the State Plane northing and easting defining the block's northwest corner, the State identifier "PA", and the State Plane zone designator "N" or "S" (e.g. 45001210PAS).

Purpose:

These data are provided solely for use as an ancillary reference layer to PAMAP topographic survey products. These vectors are not designed to support hydraulic applications and do NOT meet FEMA's Guidelines and Specifications for Flood Hazard Mapping Partners (Appendix A: Guidance for Aerial Mapping & Surveying, Section A.8, April 2003).

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date:20060321

Ending_Date:20060502

Currentness_Reference:

ground condition

Status:

Progress:Complete

Maintenance_and_Update_Frequency:Unknown

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate:-76.073628

East_Bounding_Coordinate:-76.036594

North_Bounding_Coordinate:41.197361

South_Bounding_Coordinate:41.169383

Keywords:

Theme:

Theme_Keyword_Thesaurus:ISO 19115 Topic Categories

Theme_Keyword:DEM

Theme_Keyword:contours

Theme_Keyword:topography

Theme_Keyword:LiDAR

Theme_Keyword:breaklines

Theme_Keyword:imageryBaseMapsEarthCover

Place:

Place_Keyword_Thesaurus:None

Place_Keyword:Pennsylvania

Access_Constraints:None

Use_Constraints:

The Originator, Publisher and Distributor exclude any and all implied warranties and make no warranty or representation with respect to the data files or accompanying documentation, including quality, performance, merchantability or fitness for a particular purpose. These data files and documentation are provided 'as is' and the User assumes the entire risk as to their quality and performance.  The Originator and Publisher, as indicated in the metadata, should be clearly cited in any product derived from this data. Any modifications to this data must be described in any digital or hardcopy product derived from this data.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Organization:PAMAP Program, PA Department of Conservation and Natural Resources, Bureau of Topographic and Geologic Survey

Contact_Position:Director

Contact_Address:

Address_Type:mailing and physical address

Address:

PAMAP Program

Address:

PA DCNR Topographic and Geologic Survey

Address:

3240 Schoolhouse Road

City:Middletown

State_or_Province:PA

Postal_Code:17057

Country:USA

Contact_Voice_Telephone:(717) 702-2053

Hours_of_Service:0800-1630

Data_Set_Credit:

PAMAP Program, Bureau of Topographic and Geologic Survey, PA Department of Conservation and Natural Resources

Native_Data_Set_Environment:

Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.2.5.1450

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

The accuracy of the ground control is confirmed by the evaluation of the results of the analytical bundle adjustment.  The residuals of the final adjustment ensured compliance with NSSDA standards.  The Pre Adjustment Gross Error Detection Statistical Test (Data Snooping, with a confidence level of 99.9%) have been applied to all observations included in the aerial triangulations. To detect small gross errors, during Adjustment Robust Estimators were used with the same confidence level and a power of the test of 1-beta=0.2. Systematic errors were eliminated through self calibration and through Additional Parameters. Their numerical stability, statistical significance, internal and external reliability were checked using Student-t test with the same confidence level and Variance/Co-variance analysis. Finally, the arrived variance factor C was submitted to a Chi-square test against the pre-adjustment variance factor using a confidence level 99.9%.  

During the scanning of the original aerial film, the image histogram for each frame is carefully examined to ensure that the image has been scanned so that the minimum and maximum brightness values are captured to eliminate any loss of detail due to saturation of dark or light areas.  

The LiDAR flying height, field of view, laser repetition rate, aircraft speed, and the maximum baseline distances from the aerial platform to the ground based GPS stations have been fine tuned to ensure an RMSEz of the processed data at the 18.5 cm level for the base earth surface as required by the FEMA guidelines.

See the PAMAP Technical Proposal dated January 11, 2006 for further QA/QC procedures.

Logical_Consistency_Report:

All files are inspected by the Production Manager 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.

Completeness_Report:

All files are visually inspected for completeness to ensure that no gaps or misplacement exists in the data.  The files have been checked to ensure that the boundary and the content has been covered in its entirety.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

The horizontal accuracy standard follows the NSSDA-1998 standard.  The maximum permissible RMSE for 95% of the horizontal check points for the mapping product is 5 feet or better.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

The vertical accuracy will meet the requirements of NSSDA at the 95% confidence interval (1.96 x RMSE).

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator:RETTEW Associates, Inc.

Publication_Date:20060424

Title:

GPS Photo Control Survey

Type_of_Source_Media:CD-ROM

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date:20060424

Source_Currentness_Reference:

ground condition

Source_Citation_Abbreviation:

GPS Ground Control

Source_Contribution:

GPS control points are used to support the acquisition of the imagery and LiDAR data.  Photo identifiable ground control points (panels) based on the control plan are utilized in the analytical aerotriangulation process.  A number of "blind-point" panels were established and used during the QA/QC check of the orthophotos, LiDAR data and contour information.  All horizontal and vertical control was prepared under the supervision of licensed Professional Land Surveyors.

Source_Information:

Source_Citation:

Citation_Information:

Originator:Photo Science, Inc.

Publication_Date:20060411

Title:

Color Aerial Photography

Geospatial_Data_Presentation_Form:remote-sensing image

Source_Scale_Denominator:19200

Type_of_Source_Media:filmstrip

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date:20050409

Ending_Date:20050411

Source_Currentness_Reference:

ground condition

Source_Citation_Abbreviation:

Aerial Photography

Source_Contribution:

Color aerial photography to be used in the creation of digital orthophotos, breaklines, and topographic contours.

Source_Information:

Source_Citation:

Citation_Information:

Originator:Photo Science, Inc.

Publication_Date:20060502

Title:

LiDAR

Type_of_Source_Media:disc

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date:20060321

Ending_Date:20060502

Source_Citation_Abbreviation:

Raw LiDAR

Source_Contribution:

LiDAR elevation data used in the creation of the terrain surface.

Process_Step:

Process_Description:

Horizontal and Vertical control points were acquired utilizing GPS collection techniques.  All control was prepared under the supervision of licensed Professional Land Surveyors.

Process_Date:20060424

Source_Produced_Citation_Abbreviation:

GPS Ground Control

Process_Step:

Process_Description:

Aerial photography utilizing airborne GPS techniques was acquired with 60% forward overlap and 30% sidelap at an altitude of 9600' AMT producing a negative scale of 1" = 1600'.  Aerial photography was exposed on color negative aerial film.

Process_Date:20050411

Source_Produced_Citation_Abbreviation:

Aerial Photography

Process_Step:

Process_Description:

Softcopy aerotriangulation utilizes the GPS ground control, airborne GPS data, and image coordinate measurements which are run through bundle block adjustment software computing the exterior orientation parameters for each image of the photogrammetric project.  The original aerial film was scanned utilizing a precision photogrammetric scanner at a resolution of 12.5 microns.  Using these scans the aerotriangulation process employs a rigorous mathematical model which detects measurement errors, and corrects for systematic image distorion, film shrikage, atmospheric refraction and camera lens distortions.  The final bundle adjustment results are inspected to ensure that the RMSE meets the required 1 part in 10000.

Source_Used_Citation_Abbreviation:

GPS Ground Control

Source_Used_Citation_Abbreviation:

Aerial Photography

Process_Date:20051206

Source_Produced_Citation_Abbreviation:

Analytical Aerotriangulation

Process_Step:

Process_Description:

LiDAR collection and processing generally adhered to FEMA Guidelines and Specifications for Flood Hazard Mapping Partners, Appendix A: Guidance for Aerial Mapping & Surveying, Section A.8: Airborne Light Detection and Ranging (LiDAR) Surveys.  Raw LiDAR data was collected using a sensor equipped with an airborne GPS/IMU system.  Flight lines with a 30% sidelap were flown with a nominal average LiDAR point spacing of 1.4 meters using a 43 degree field of view (full angle) at a laser pulse rate of 40.6 kHz.  The raw LiDAR data is processed and filtered to remove LiDAR points on elevated features such as vegetation, buildings, cars, etc. in order to create a bare earth surface meeting the accuracies required for orthophoto and contour generation.  

Source_Used_Citation_Abbreviation:

Raw LiDAR

Source_Used_Citation_Abbreviation:

GPS Ground Control

Process_Date:20061114

Source_Produced_Citation_Abbreviation:

Processed LiDAR

Process_Step:

Process_Description:

Photogrammetrically compiled breaklines were collected along various planimetric features and significant breaks in grade.  The elevation values for the breaklines were populated from the LiDAR data maintaining the horizontal position as captured photogrammetrically.  The breaklines are tiled and converted to ESRI 3D Shapefiles.  Topology checks are performed to find errors in edgematching, dangles, and intersections.

Source_Used_Citation_Abbreviation:

Aerial Photography

Source_Used_Citation_Abbreviation:

Analytical Aerotriangulation

Source_Used_Citation_Abbreviation:

Processed LiDAR

Process_Date:20061127

Source_Produced_Citation_Abbreviation:

ESRI 3D Breakline Shapefile

Process_Step:

Process_Description:

Metadata imported.

Source_Used_Citation_Abbreviation:

K:\billk\metadata\723_Luzerne_New\BL_Shape\metadata.xml

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method:Vector

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type:String

Point_and_Vector_Object_Count:851

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Map_Projection:

Map_Projection_Name:Lambert Conformal Conic

Lambert_Conformal_Conic:

Lambert Conformal Conic

Standard_Parallel:40.883333

Standard_Parallel:41.950000

Longitude_of_Central_Meridian:-77.750000

Latitude_of_Projection_Origin:40.166667

False_Easting:1968500.000000

False_Northing:0.000000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method:coordinate pair

Coordinate_Representation:

Abscissa_Resolution:0.000000

Ordinate_Resolution:0.000000

Planar_Distance_Units:survey 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

Altitude_Resolution:0.000328

Altitude_Distance_Units:feet

Altitude_Encoding_Method:Explicit elevation coordinate included with horizontal coordinates

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label:PAMAP Breaklines

Attribute:

Attribute_Label:FID

Attribute_Definition:

Internal feature number.

Attribute_Definition_Source:

ESRI

Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label:Shape

Attribute_Definition:

Feature geometry.

Attribute_Definition_Source:

ESRI

Attribute_Domain_Values:

Unrepresentable_Domain:

Coordinates defining the features.

Attribute:

Attribute_Label:B_Line_Ty

Overview_Description:

Entity_and_Attribute_Overview:

This shapefile contains photogrammetrically captured breaklines.  Breaklines were collected along various planimetric features and significant breaks in grade.  

The attribute B_Line_Ty describes the breakline type: Paved Roads; Unpaved Roads; Single Line Drains; Lakes & Ponds; Other Hydro Features; Double Line Drains; Other Breaklines; Railroads.

Entity_and_Attribute_Detail_Citation:

Where applicable, all data conforms to the PAMAP Technical Proposal dated January 11, 2006.

Distribution_Information:

Distributor:

Contact_Information:

Contact_Person_Primary:

Contact_Organization:Pennsylvania Spatial Data Access (PASDA)

Contact_Address:

Address_Type:mailing and physical address

Address:

Pennsylvania Spatial Data Access (PASDA)

Address:

Penn State Institutes of Energy and the Environment

Address:

115 Land and Water Building

City:University Park

State_or_Province:PA

Postal_Code:16802

Country:USA

Contact_Voice_Telephone:814-863-0104

Contact_Electronic_Mail_Address:pasda@psu.edu

Resource_Description:Downloadable Data

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.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Transfer_Size:1.068

Metadata_Reference_Information:

Metadata_Date:20081022

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:PAMAP Program, PA Department of Conservation and Natural Resources, Bureau of Topographic and Geologic Survey

Contact_Position:Director

Contact_Address:

Address_Type:mailing and physical address

Address:

PAMAP Program

Address:

PA DCNR Topographic and Geologic Survey

Address:

3240 Schoolhouse Road

City:Middletown

State_or_Province:PA

Postal_Code:17057

Country:USA

Contact_Voice_Telephone:(717) 702-2053

Metadata_Standard_Name:FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version:FGDC-STD-001-1998

Metadata_Time_Convention:local time

Metadata_Extensions:

Online_Linkage:

Profile_Name:ESRI Metadata Profile