Identification_Information: Citation: Citation_Information: Originator: Photo Science, Inc Publication_Date: 20070921 Title: Fresh Creek, Great Bog, White Mountain, and Winnicut New Hampshire LiDAR 2007 Publication_Information: Publication_Place: St. Louis, Inc Publisher: United States Army Corps of Engineers (USACE) Description: Abstract: LiDAR data collection was performed utilizing a Leica ALS-50 sensor, collecting multiple return x, y, and z data as well as intensity data. LiDAR data was processed to achieve a bare ground surface, and was delivered in LAS format. Purpose: Final product delivery of bare ground surface was intended to suit the needs of NOAA for elevation-related tasks. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20070505 Ending_Date: 20070507 Currentness_Reference: Ground Condition Status: Progress: Complete Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -71.415011472 East_Bounding_Coordinate: -70.798450460 North_Bounding_Coordinate: 44.284093314 South_Bounding_Coordinate: 42.952321097 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Light Detection and Ranging Theme_Keyword: LiDAR Theme_Keyword: Bare Ground Surface Theme_Keyword: Elevation Place: Place_Keyword_Thesaurus: None Place_Keyword: New Hampshire Access_Constraints: None Use_Constraints: None Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: USACE Contact_Person: Bob Mesko Contact_Address: Address_Type: mailing and physical address Address: 1222 Spruce Street City: Saint Louis State_or_Province: MO Postal_Code: 63103-2833 Country: US Contact_Voice_Telephone: 314-331-8385 Data_Quality_Information: Logical_Consistency_Report: Elevation data was delivered covering the full extent of each study area. Completeness_Report: All project tasks have been completed. No known data gaps exist (with the exception of water areas) within the project area. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: 17 centimeter stated accuracy (according to sensor manufacturer) for cross track and along track positions. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Based on a control-to-LiDAR comparison, LiDAR data delivered for this project returned an RMSE of 0.232 feet. The RMSE was determined based on a total of 33 known elevations. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Photo Science, Inc Publication_Date: 20070925 Title: New Hampshire LiDAR Type_of_Source_Media: Hard Drive Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20070505 Ending_Date: 20070507 Source_Currentness_Reference: Ground Condition Source_Citation_Abbreviation: LiDAR Surface Source_Contribution: Raw LiDAR elevation data utilized in production of final bare ground surface. Process_Step: Process_Description: Utilizing Photo Science's two ALS-50 LiDAR sensors, data was collected to cover four study areas in New Hampshire. Data was collected in a total of 71 flightlines at a pulse rate of 55,600 points per second. Process_Date: 20070831 Process_Step: Process_Description: Raw LiDAR data (collected as Process Step 1) was processed to create a bare ground surface. Process included calibration of LiDAR data to remove systematic errors (utilizing Leica's ALS Processor software), adjustment of elevation data to control positions (utilizing TerraScan software for control comparisons and adjustments), and both automatic and manual editing to correctly classify ground and non-ground data (utilizing TerraScan and TerraModeler softwares). In addition, QC steps were performed before and after processing. QC steps included line-to-line vertical comparisons and coverage checks, and were performed with TerraScan and GeoCue softwares. Process_Date: 20070831 Process_Step: Process_Description: Utilizing bare ground surface LiDAR data and breakline data, a 1 meter post-spacing DEM was created to cover the entire project area. DEM was created by first triangulating the bare ground LiDAR points, and then inserting the collected breakline data to ensure proper behavior in drainage areas. DEM was created in TerraSolid's TerraModeler software. Process_Date: 20070925 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 19 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.9996 Longitude_of_Central_Meridian: -069.000000 Latitude_of_Projection_Origin: +00.000000 False_Easting: 500000 False_Northing: 0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.001 Ordinate_Resolution: 0.001 Planar_Distance_Units: Meters Vertical_Coordinate_System_Definition: Altitude_System_Definition: Altitude_Datum_Name: NAVD88 Altitude_Resolution: 0.001 Altitude_Distance_Units: Feet Altitude_Encoding_Method: Explicit elevation coordinate included with horizontal coordinates Metadata_Reference_Information: Metadata_Date: 20070926 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 Contact_Voice_Telephone: 859-277-8700 Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998