Raster Dataset
Tags
Full-color, fli-map, LiDAR, FLI-MAP, intensity image, Upper Elm Creek, FLIMAP, Light Detection and Ranging, flimap, Intensity, intensity, Linescan, topography, Manitoba, high-resolution
Dataset created under request from Manitoba Infrastructure and Transportation
1 m resolution bare-earth DEM obtained from ground filtering of FLI-MAP LiDAR survey data in area A of the Upper Elm Creek project region.
There are no credits for this item.
Data not to be used beyond the limits of the source scale
Extent
West | -98.164188 | East | -97.599288 |
North | 50.189153 | South | 49.914009 |
Maximum (zoomed in) | 1:5,000 |
Minimum (zoomed out) | 1:150,000,000 |
LiDAR Acquisition LiDAR acquisition for this project was performed by Fugro Horizons in a Twin Cessna 310 equipped with a Flimap Fx LiDAR system including an inertial measuring unit (IMU) and a dual frequency GPS receiver. Acquisition was accomplished between October 2nd 2012 and October 11th 2012. The LiDAR flight specifications follow: Field of View: 60 Degrees Altitude:2100 feet AMT Scan Rate:50 rps Pulse Rate:200 kHz Airspeed:130 knots Average Post Spacing: 4pts/m^2 Average Swath Width: 650 Meters Total Flight Lines: 47 Number of Lifts: 4 GPS Data Collection A GPS receiver was in constant operation over a control point during flight acquisition. The base station identification and location are listed in the following table. Base S1:49 48 46.10892, 97 58 57.04743, 220.363 Base S1a: 49 48 46.15541, 97 58 53.93487, 220.260 Base S2: 49 42 52.08990, 98 11 14.27833 , 265.333 Base S2a: 49 42 55.97045, 98 11 14.13693, 265.965 GPS Data Processing All GPS phase data was post processed with continuous kinematic survey techniques using “On the Fly” (OTF) integer ambiguity resolution. The GPS data was processed with forward and reverse processing algorithms. The results from each process, using the data collected at the airport, were combined to yield a single fixed integer phase differential solution of the aircraft trajectory. The differences between the forward to reverse solution within the project area were within project specifications (<10cm) in both the horizontal and vertical components, indicating a valid and accurate solution. IMU Data Processing An IMU (inertial measurement unit) was used to record precise changes in position and orientation of the LIDAR scanner at a rate of 200 Hz. All IMU data was processed post flight with a filter to integrate inertial measurements and precise phase differential GPS positions. The resulting solution contains geodetic position, omega, phi, kappa, and time for subsequent merging with the laser ranging information.
Data not to be used beyond the limits of the source scale