Rock River, VT 1.4 meter LiDAR Contract Number 07CRCN0014 Task Order Number G09PD00085

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Photo Science, inc.

Publication_Date: Unpublished Material

Title:

Rock River, VT 1.4 meter LiDAR Contract Number 07CRCN0014 Task Order Number G09PD00085

Geospatial_Data_Presentation_Form: model

Description:

Abstract:

LiDAR was collected at a 1.4 points per square meter (1.4m GSD) for 359 square miles in northwestern Vermont. The geoid used to reduce satellite derived elevations to orthometric heights was Geoid 03. Nominal pulse density is 77,100 Hz. GPS coordinates are referenced to NAD83 Vermont State Plane Coordinate System. Maximum differential baseline lengths is 33 miles. Mean differential baseline lengths is 15 miles. Laser bore site calibration is the process whereby the angular misalignment between the IMU and the laser is determined. The components determined are roll, pitch and heading. These are rotations around the X, Y and Z-axis respectively. For more detailed information about calibration procedures, please see the project report.

Purpose:

1.4 meter point spacing LiDAR data collection provides the information to create processed Bare Earth data files, Digital Elevation Models (DEM), and 2' Contours.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20081102

Ending_Date: 20090416

Currentness_Reference: ground condition

Status:

Progress: Complete

Maintenance_and_Update_Frequency: Unknown

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -73.299413

East_Bounding_Coordinate: -72.891297

North_Bounding_Coordinate: 45.028491

South_Bounding_Coordinate: 44.720440

Keywords:

Theme:

Theme_Keyword_Thesaurus: none

Theme_Keyword: Digital Elevation Model

Theme_Keyword: contour

Theme_Keyword: model

Theme_Keyword: DEM

Theme_Keyword: LiDAR

Theme_Keyword: remote sensing

Place:

Place_Keyword_Thesaurus: None

Place_Keyword: Vermont

Place_Keyword: Rock River

Place_Keyword: US

Access_Constraints: Unknown.

Use_Constraints: Unknown.

Data_Set_Credit: Photo Science, Inc. flew the LiDAR and processed the data.

Native_Data_Set_Environment:

MicroStation Version 8; TerraScan Version 8; ALS Post Processor Version 2.68; TerraModeler Version 8; GeoCue Version 4; QT Modeler 6.1.2; QT Reader 6.0.6; ESRI ArcGIS 9.3; Windows XP Operating System

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

The project area requires LiDAR to be collected on average of 1.4 meter point spacing or better and vertical accuracy of 18.0 centimeters RMSE or better to support 2' contour generation.

Logical_Consistency_Report:

Deliverables were tested by Photo Science for both vertical and horizontal accuracy. All data is seamless from one tile to the next, no gaps or no data areas.

Completeness_Report: Datasets contain complete coverage of tiles.

Positional_Accuracy:

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

Deliverables were tested by Photo Science for both vertical and horizontal accuracy. All data is seamless from one tile to the next, no gaps or no data areas. The vertical unit of the data file is in decimal feet with 2-decimal point precision.

Quantitative_Vertical_Positional_Accuracy_Assessment:

Vertical_Positional_Accuracy_Value: 0.082

Vertical_Positional_Accuracy_Explanation: RMSE in meters

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: Photo Science, Inc.

Publication_Date: 2009

Title: LiDAR

Geospatial_Data_Presentation_Form: digital data

Type_of_Source_Media: hard drive

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20081102

Ending_Date: 20090416

Source_Currentness_Reference: ground condition

Source_Citation_Abbreviation: LiDAR

Source_Contribution: LiDAR points were used to produce the deliverables.

Process_Step:

Process_Description:

Leica software was used in the post processing of the airborne GPS and inertial data that is critical to the positioning of the sensor during all flights. This software suite includes Applanix's PosPac and Waypoint's GrafNav solutions. PosPac provides the smoothed best estimate of trajectory (SBET) that is necessary for Leica's post processor to develop the point cloud from the LiDAR missions. The point cloud is the mathematical three dimensional collection of all returns from all laser pulses as determined from the aerial mission. At this point this data is ready for analysis, classification, and filtering to generate a bare earth surface model in which the above ground features are removed from the data set. The point cloud was manipulated within the Leica software; GeoCue, TerraScan, and TerraModeler software was used for the automated data classification, manual cleanup, and bare earth generation from this data. Project specific macros were used to classify the ground and to remove the side overlap between parallel flight lines. All data was manually reviewed and any remaining artifacts removed using functionality provided by TerraScan and TerraModeler. QT Modeler and QT Reader was used to review the surfaces a second time to ensure the bare earth surface model.

Source_Used_Citation_Abbreviation: LiDAR

Process_Date: 2009

Source_Produced_Citation_Abbreviation: LiDAR post-processed data

Source_Produced_Citation_Abbreviation: Digital Elevation Model

Source_Produced_Citation_Abbreviation: 2' LiDAR Contours

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: 4400

Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.999600

Longitude_of_Central_Meridian: -72.500000

Latitude_of_Projection_Origin: 42.5000000

False_Easting: 500000.000000

False_Northing: 0.000000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: row and column

Coordinate_Representation:

Abscissa_Resolution: 2.0

Ordinate_Resolution: 2.0

Planar_Distance_Units: survey feet

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1983

Ellipsoid_Name: Geodetic Reference System 1980

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: 2.0

Altitude_Distance_Units: feet

Altitude_Encoding_Method: Implicit coordinate

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: LAS Files

Entity_Type_Definition: processed Bare Earth LiDAR files

Entity_Type_Definition_Source: All deliverables meet specifications in contract 07CRCN0014

Attribute:

Attribute_Label: X

Attribute_Definition: X coordinate information of the point

Attribute_Definition_Source: All deliverables meet specifications in contract 07CRCN0014

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 437000

Range_Domain_Maximum: 469000

Attribute_Units_of_Measure: meters

Attribute_Measurement_Resolution: 0.001

Attribute:

Attribute_Label: Y

Attribute_Definition: Y coordinate information of the point

Attribute_Definition_Source: All deliverables meet specifications in contract 07CRCN0014

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 247000

Range_Domain_Maximum: 281000

Attribute_Units_of_Measure: meters

Attribute_Measurement_Resolution: 0.001

Attribute:

Attribute_Label: Z

Attribute_Definition: Z coordinate information of the point

Attribute_Definition_Source: All deliverables meet specifications in contract 07CRCN0014

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0

Range_Domain_Maximum: 500

Attribute_Units_of_Measure: meters

Attribute_Measurement_Resolution: 0.0001

Attribute:

Attribute_Label: Classification

Attribute_Definition: Surface type represented by data.

Attribute_Definition_Source: ASPRS LAS 1.1 Specifications

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: 1, 2, 8, 9, 12

Enumerated_Domain_Value_Definition:

Default (1), Ground (2), Model Key (8), Water (9), and Overlap (12) values

Enumerated_Domain_Value_Definition_Source: ASPRS LAS 1.1 Specifications

Attribute:

Attribute_Label: Point Source ID

Attribute_Definition: Flightline Identification Number

Attribute_Definition_Source: PhotoScience, Inc.

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1

Range_Domain_Maximum: 300

Attribute_Units_of_Measure: None

Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: GPS Time

Attribute_Definition: Capture time of data

Attribute_Definition_Source: International Atomic Clock

Attribute_Domain_Values:

Unrepresentable_Domain: Capture time of data as recorded by on-board GPS

Attribute:

Attribute_Label: Return Number

Attribute_Definition: Capture status

Attribute_Definition_Source: ASPRS LAS 1.1 Specifications

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: First, Only, Intermediate, Last

Enumerated_Domain_Value_Definition: Return state of data

Enumerated_Domain_Value_Definition_Source: ASPRS LAS 1.1 Specifications

Attribute:

Attribute_Label: Number of Returns

Attribute_Definition: Number of return(s) on data

Attribute_Definition_Source: ASPRS LAS 1.1 Specifications

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: 1/1, 1/2, 1/3, 1/4, 2/2, 2/3, 2/4, 3/3, 3/4, 4/4

Enumerated_Domain_Value_Definition: Pulse return number for given output pulse

Enumerated_Domain_Value_Definition_Source: ASPRS LAS 1.1 Specifications

Attribute:

Attribute_Label: Scan Angle Rank

Attribute_Definition: collected angle of scan

Attribute_Definition_Source: LiDAR Sensor

Attribute_Domain_Values:

Unrepresentable_Domain: Typically half of the field of view. Varies per mission

Attribute:

Attribute_Label: Intensity

Attribute_Definition: Strength of return

Attribute_Definition_Source: ASPRS LAS 1.1 Specifications

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0

Range_Domain_Maximum: 255

Attribute_Units_of_Measure: whole numbers

Attribute_Measurement_Resolution: 1

Metadata_Reference_Information:

Metadata_Date: 20090610

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Photo Science, Inc.

Contact_Person: Mark Meade

Contact_Address:

Address_Type: mailing and physical address

Address: 2670 Wilhite Drive

City: Lexington

State_or_Province: KY

Postal_Code: 40503

Country: USA

Contact_Voice_Telephone: 859-277-8700

Contact_Electronic_Mail_Address: mmeade@photoscience.com

Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998