Mapping Robber's Cave
A University of Nebraska-Lincoln assistant professor and his team use LiDAR technology to digitally map Robber's Cave.
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- [00:00:00.000](intense music)
- [00:00:01.040]A bird's eye view of the city of Lincoln
- [00:00:03.340]doesn't show what's deep between the surface.
- [00:00:06.460]Inside a nondescript building on the southwest edge of town
- [00:00:10.350]is the entrance to Robber's Cave,
- [00:00:12.690]one of Lincoln's oldest landmarks.
- [00:00:15.190]Here's another face carved into the sandstone.
- [00:00:19.320]That's where Richard Wood and his team
- [00:00:21.350]spent about 30 hours using LIDAR technology
- [00:00:24.790]to digitally map the cave.
- [00:00:27.890]In 92 locations, engineering researchers
- [00:00:30.750]captured every contour and carving
- [00:00:33.310]in the 5,000 plus square foot cave.
- [00:00:36.280]LIDAR stands for light detection and ranging.
- [00:00:38.830]We place the instrument in one spot.
- [00:00:41.620]It sends out a wave form of laser.
- [00:00:44.400]It can estimate in a relative coordinate system,
- [00:00:47.890]you know, what's the distance to the surface of the walls.
- [00:00:52.560]The project is funded by History Nebraska.
- [00:00:55.410]Results will be used as part
- [00:00:57.150]of an application to add Robber's Cave
- [00:00:59.750]to the National Register of Historic Places.
- [00:01:02.730]The purpose of our project is to digitally document
- [00:01:06.154]and characterize Robber's Cave.
- [00:01:09.430]So that's both geometrically
- [00:01:11.820]as well as capture the iconography
- [00:01:14.920]or the engravings in the wall.
- [00:01:17.040]Robber's Cave dates back to the late 1800s
- [00:01:19.990]when German immigrants expanded a natural cave
- [00:01:22.840]by tunneling through the soft Dakota sandstone.
- [00:01:26.020]Over the decades, chambers originally used to store grain
- [00:01:29.600]also played host to parties, concerts and meetings.
- [00:01:33.490]We should be good to go.
- [00:01:35.418]Students who are part of the mapping team
- [00:01:38.060]gain valuable experience in a challenging environment.
- [00:01:41.820]If we want to collect all the details
- [00:01:44.389]off the surface features, it's going to be challenging
- [00:01:48.720]where to put the scanner and how high we set it
- [00:01:51.680]and what's the scan distance.
- [00:01:53.440]It's kind of musty down here.
- [00:01:55.150]I guess we ran into some bats and no ghosts though.
- [00:01:59.980]Wood's research involves analyzing buildings,
- [00:02:02.940]highways and bridges.
- [00:02:04.630]In the classroom students learn
- [00:02:06.300]how to use the technology needed for careers in engineering.
- [00:02:10.190]Point clouds in this sense, you know,
- [00:02:11.990]the data output from LIDAR scanners,
- [00:02:14.814]we're actually introducing
- [00:02:17.050]in our sophomore level geomatics and surveying class.
- [00:02:20.880]For the engineering team,
- [00:02:22.340]it's a deep dive into a piece of Lincoln history.
- [00:02:26.081](dramatic music)
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