A04_-_Statement_of_Need_and_Salient_Characteristics.pdf

Statement of Need, Salient Characteristics and Deliverables Terrestrial Long-Range LiDAR Scanner

OSMRE IR 1 and 2

FY 2023

General Information/Statement of Need

The Office of Surface Mining, Reclamation and Enforcement (OSMRE) seeks to obtain a long-range, high-accuracy, high-precision ground-based (i.e., terrestrial) laser scanner (TLS), with the ability to collect elevation and surface data over the large distances associated with open-pit coal mining and coal mining reclamation projects. This scanner will serve to aid OSMRE’s Regions 1 & 2 Technical Support Division by providing a tool to quickly model (scan) the terrain at both active and abandoned coal mining sites, and create large, high-accuracy point clouds which aid in the creation of subsequent data products such as digital surface models (DSMs), digital terrain models (DTMs), classified point clouds, surface meshes, and contour maps. These data products are important to OSMRE’s mission, as it relates to technical services provided to States and Tribes on traditional fee-based AML projects, BIL projects, AML emergencies and active (Title V) sites. These applications include:

Cut Fill Analysis

Volumetric calculations Mining pit and spoil pile modeling (size/volumes) Creation of as-built surfaces Modeling of surface configuration before/after mining to ensure compliance with SMCRA regulations related to Approximate Original Contour

The TLS will also serve to complement existing technical workflows; i.e. data files exported by the scanner and scanner software, such as LAS/LAZ formats will be used directly in existing TIPS software, such as GIS and CAD environments. This data can also be combined with other ground-based data (such as GNSS-captured ground points) or combined with airborne surveys such as photogrammetry or LiDAR-derived aerial surveys. Existing GNSS hardware can also be used for precisely geolocating control points in the scans or used as quality control check points.

The scanner must possess the capabilities as noted below.

Technical Specifications/Salient Characteristics:

The following salient characteristics are required for the long-range, high-speed, terrestrial based LiDAR scanner (hardware requirements):

• Camera: Integrated or external mount DSLR camera with USB power supply. Image capture simultaneous during scanning

• Scan Registration: Automatic scan registration while moving (as background process)

• Laser Product Class: Eye Safety Class 1 (eyesafe) per IEC 60825-1:2014

• Operating Mode/Measuring Principles: Time of flight measurement, echo signal digitation, online waveform processing, multiple-time-around processing, single pulse ranging

• Maximum Measurement Range at 90% reflectivity: up to 2,500 m at 50 kHz

• Maximum Measurement Range at 20% reflectivity: up to 1,300 m at 50 kHz

• Minimum Range: 1.0m at 600kHz

• Minimum targets per pulse: 4 (First and Last). Greater than 4 preferred.

• Laser Pulse Repetition Rate: 50kHz to 1.2 MHz

• Effective Measurement Rate (meas./sec): 21,000 to 500,000 (meas/sec)

• Ranging Accuracy: 5 mm

• Ranging Precision: 3 mm

• 3D Position Accuracy: 3 mm @ 50m, 5 mm @ 100m

• Laser Wavelength: Near Infrared

• Field of View: 100° vertical / 360° horizontal

• Waveform Data Output: Optional (Preferred)

• Angular Accuracy: 0.0028 deg (10 acrsec)

• Laser Beam Divergence: 0.19 mrad @ 1/e, 0.27 mrad @ 1/e2

• Orientation Sensors: Integrated 3-axis accelerometer, 3-axis gyroscope, 3-axis magnetometer (compass), barometer

• GNSS Receiver: At a minimum, integrated L1 GPS receiver, concurrent collection of

GPS, GLONASS, Beidou. Real Time Kinematics RTK capability via GNSS Correction service via internet or Emlid Reach RS2 Base station.

• Laser Plummet: Integrated

• Power supply: 11-34 Volt DC, 70W power consumption, battery powered with LiION or

NiMH battery supply with optional external power source

Scanning Software Technical Requirements:

Acquiring Data:

• Scanner and Configuration Control

• Scan and Image Data in Real-time

• Instant Target Selection

• Real-time data transfer and preview

Viewing Data:

• 2D and 3D viewing

• View by attributes

• 3D animations and ortho plots

Processing Data:

• Data Adjustment

• Project Georeferencing

• Filtering and Scan Position Registration

Analyzing and Exchange of Data:

• Meshing

• Volume Calculation

• Surface Comparison

• Export of LAS/LAZ and/or CAD formats included

Deliverables:

• Long-Range Terrestrial Laser Scanner

• Integrated camera or external camera DSLR bundle

• Ancillary equipment, range poles, brackets, reflective targets, LiION or NiMH batteries and AC power supply

• Required software for data collection, post processing and exporting point clouds

• Hands-on, in-person field training for up to 5 employees on all hardware and software