SFCO2014 LiDAR SWATH

Identification_Information:

Citation:

Citation_Information:

Originator: Bohannan Huston, Inc.
Publication_Date: 20141023
Title: SFCO2014 LiDAR SWATH
Geospatial_Data_Presentation_Form: vector digital data

Description:

Abstract:

Between March 12 and August 11, 2014, LiDAR data was acquired over the entirety of Santa Fe County in New Mexico, as well as portions of Rio Arriba, Taos, Mora, Los Alamos, San Miguel, and Torrance Counties. The project area covers approximately 3,000 square miles of urban, desert, and mountain areas. The project was broken into five quadrants in order to utilize a 30km max distance from the Continuously Operating Reference Stations (CORS) for the LiDAR collects. Each quadrant contained varying numbers of flightlines and statically-collected survey data to ensure the LiDAR data maintained its true geographic integrity. The LiDAR acquisition platform for the Santa Fe County project was a turbocharged Cessna 206 equipped with an Optech ALTM Orion H300 LiDAR sensor, collecting multiple return x, y, and z values. The shapefile contains acquisition information from each LiDAR swath which includes returns, nominal pulse spacing (NPS), points per square meter (PPSM), date, lift, GPS start and end time.

Purpose:

This LiDAR swath data is used to display LiDAR acquisition information as it pertains to the actual flight paths related to the project.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20140312
Ending_Date: 20140811

Currentness_Reference: Santa Fe County, New Mexico

Status:

Progress: Complete
Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -106.258185
East_Bounding_Coordinate: -105.610697
North_Bounding_Coordinate: 36.253707
South_Bounding_Coordinate: 34.990690

Keywords:

Theme:

Theme_Keyword_Thesaurus: None
Theme_Keyword: LiDAR
Theme_Keyword: Acquisition
Theme_Keyword: LiDAR Swath
Theme_Keyword: Trajectories
Theme_Keyword: LiDAR Flightlines

Access_Constraints: None
Use_Constraints:

Neither Santa Fe County, nor Bohannan Huston, Inc. (BHI) assumes liability for misuse of the data. Data should be used at the scale for which they were intended. No warranty, expressed, or implied, is made by Santa Fe County nor BHI regarding the utility of the data on any other system, nor shall the act of distribution constitute such warranty.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Bohannan Huston, Inc.
Contact_Person: Robert Dzur

Contact_Position: Senior Vice President
Contact_Address:

Address_Type: mailing and physical
Address: 7500 Jefferson St NE
City: Albuquerque
State_or_Province: NM
Postal_Code: 87109

Contact_Voice_Telephone: 505-823-1000
Contact_Electronic_Mail_Address: rdzur@bhinc.com

Data_Set_Credit: Bohannan Huston, Inc.; Aero-Graphics, Inc.
Native_Data_Set_Environment:

Optech FMS Planner Flight Management System; Terrasolid TerraScan v. .014.013

Data_Quality_Information:

Logical_Consistency_Report: not applicable
Completeness_Report:

The County of Santa Fe, New Mexico, is furnishing these geographic data on an "as is" basis, and Santa Fe County makes no guarantee, representation or warranty concerning the accuracy or completeness of information contained in the geographic data. Santa Fe County further makes no guarantees, representations or warranties, either expressed or implied, as to any other matter whatsoever concerning the data and product, including, without limitation, the condition of the product, or its fitness for any particular use or purpose. The burden for determining fitness for use lies entirely with the user. Although these data have been processed successfully on computers of Bohannan Huston, Inc. (BHI) and served by Santa Fe County, no guarantee, representation or warranty, either expressed or implied, is made by Santa Fe County or BHI regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such guarantee, representation or warranty. In no event shall Santa Fe County or BHI have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including, but not limited to, any loss of profits arising out of use of or reliance on the geographic data or arising out of the delivery, installation, operation, or support by Santa Fe County.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: Bohannan Huston Inc. - Aero-Graphics, Inc.
Publication_Date: 20141023
Title: LiDAR Flight Swaths
Geospatial_Data_Presentation_Form: document

Type_of_Source_Media: None
Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20140312
Ending_Date: 20140811

Source_Currentness_Reference: observed

Source_Citation_Abbreviation: LiDAR Swath
Source_Contribution:

LiDAR acquisition of Santa Fe County was performed with an Optech ALTM Orion H300 LiDAR sensor. For quadrants 1 and 5 (composed of mountain areas with significant relief), The acquisition team flew at an average altitude of 4,039 ft AGL (above ground level) and made appropriate adjustments to compensate for topographic relief. The PRF (pulse repetition frequency) used for collection was 75 kHz, scan frequency of 42.3 Hz, and scan angle of +/- 12° from the nadir position (full scan angle 24°). For quadrants 2, 3, and 4 (primarily flatter desert areas), flights were at an average altitude of 3,250 ft AGL. The PRF used for collection was 100 kHz, scan frequency of 44 Hz, and scan angle of +/-19° from the nadir position (full scan angle 38°). The Orion H300 features roll compensation that adjusts the mirror to maintain the full scan angle integrity in relation to nadir, even when less than perfect weather conditions push the sensor off nadir. Acquisition was performed with 30% overlap and yielded an average 5.9 points per square meter. The Orion H300 LiDAR sensor is capable of receiving up to four range measurements, including 1st, 2nd, 3rd, and last returns for every pulse sent from the system. The Orion H300 is also equipped with a GPS/IMU unit that continually records the XYZ position and roll, pitch and yaw attitude of the plane throughout the flight. This information allows for correction of laser return data positions that may have been thrown off by the plane’s natural movement. The ALTM Orion H300 LiDAR sensor is equipped with Optech FMS Planner Flight Management System Software. FMS Planner is the latest release from Optech, and is not only used to guide the airborne mission in flight, flight planning is performed using the same software. This smooth transition from flight planning to aerial operations eliminates discrepancies between the flight plan and what is actually acquired. The use of FMS Planner helps ensure an accurate and consistent acquisition mission with real-time quality assurance while still airborne. The system operator can monitor the point density and swath during the mission to confirm adequate coverage within the area of interest.

Process_Step:

Process_Description:

Absolute sensor calibration was adjusted for the difference in roll, pitch, heading, and scale between the raw laser point cloud from the sensor and surveyed control points on the ground. Kinematic air point processing differentially corrected the 1-second airborne GPS positions with ground base station; combined and refined the GPS positions with 1/200-second IMU (roll-pitch-yaw) data through development of a smoothed best estimate of trajectory (SBET). Raw LiDAR point processing (calibration) combined SBET with raw LiDAR range data; solved real-world position for each laser point; produced point cloud data by flight strip in ASPRS v1.2 .LAS format and later updated to ASPRS LAS v1.4; output in NAD83 State Plane New Mexico Central Zone. Relative calibration was performed by correcting roll, pitch, heading, and scale discrepancies between adjacent flightlines; tested resulting relative accuracy. The absolute accuracy assessment performed comparative tests that showed Z differences between each static survey point and the laser point surface. The results for the between-swath relative accuracy is defined as the elevation difference in overlapping areas between a given set of two adjacent flightlines. Within-swath relative accuracy is the amount of vertical separation, or “noise,” among a set of points on open, paved ground that should have the same elevation. The within-swath relative accuracy average is less than 0.026 foot.

Process_Date: 20140311
Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Aero-Graphics, Inc.

Contact_Address:

Address_Type: mailing
Address: 40 West Oakland Avenue
City: Salt Lake City
State_or_Province: UT
Postal_Code: 84115

Contact_Voice_Telephone: 801-487-3273

Spatial_Data_Organization_Information:

Indirect_Spatial_Reference:

This data represents LiDAR locations as defined within the acquisition software and flight planning.

Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
Point_and_Vector_Object_Count: 409

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Map_Projection:

Map_Projection_Name: NAD 1983 HARN StatePlane New Mexico Central FIPS 3002 Feet
Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.9999
Longitude_of_Central_Meridian: -106.25
Latitude_of_Projection_Origin: 31.0
False_Easting: 1640416.666666667
False_Northing: 0.0

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:

Abscissa_Resolution: 0.000000007285694270109391
Ordinate_Resolution: 0.000000007285694270109391

Planar_Distance_Units: foot_us

Geodetic_Model:

Horizontal_Datum_Name: D North American 1983 HARN
Ellipsoid_Name: GRS 1980
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257222101

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: SFCO2014 LiDAR SWATH
Entity_Type_Definition: Flight Strip Swaths
Entity_Type_Definition_Source: Optech Flight Planner

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: Name
Attribute_Definition: Swath identification.
Attribute_Definition_Source: Optech
Attribute_Domain_Values:

Unrepresentable_Domain: Optech software naming of features.

Attribute:

Attribute_Label: Version
Attribute_Definition: LAS version.
Attribute_Definition_Source: Feature Manipulation Engine
Attribute_Domain_Values:

Unrepresentable_Domain: LAS version conversion.

Attribute:

Attribute_Label: PtCount
Attribute_Definition: Total point count.
Attribute_Definition_Source: Optech
Attribute_Domain_Values:

Unrepresentable_Domain: Software point calculations.

Attribute:

Attribute_Label: MaxX
Attribute_Definition: Maximum X values.
Attribute_Definition_Source: Optech
Attribute_Domain_Values: