![](https://static.wixstatic.com/media/909970_b092056049794d68b7566ec0d71c7365.jpg/v1/fill/w_288,h_256,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/909970_b092056049794d68b7566ec0d71c7365.jpg)
Case study: 3D powerline corridor extraction
using oblique imagery
The Challenge
-
The Kaua'i Endangered Seabird Recovery Project needed to know the heights of electrical lines relative to adjacent vegetation to determine the risk of bird collisions along a powerline corridor.
-
Fieldwork would take considerable time and effort, given the remote and rugged terrain.
-
Existing lidar data was insufficient for discriminating the powerlines, and new lidar data collection would be cost-prohibitive.
RMH and Simplex solution
-
RMH teamed up with Simplex Mapping Solutions to survey the powerline corridor using their CaMundo mapping system, designed collect nadir and oblique views on one pass.
Results
-
The surveys resulted in 2D and 3D geospatial data products: a high resolution ortho-mosaic, a digital surface model, and a photogrammetric point cloud.
-
3D vectors of the powerlines were accurately derived using sampling based on catenary modeling.
-
Download a presentation describing the unique process.
![Line above vegetation](https://static.wixstatic.com/media/909970_7ea883168a8548ae8f9eab7b22789223.jpg/v1/fill/w_147,h_87,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/909970_7ea883168a8548ae8f9eab7b22789223.jpg)
![view 2](https://static.wixstatic.com/media/909970_1600d83cc77747a8adf70dea90b4fa32.jpg/v1/fill/w_144,h_116,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/909970_1600d83cc77747a8adf70dea90b4fa32.jpg)
![view 3](https://static.wixstatic.com/media/909970_02e69d0deda948b78bf06267286f741a.jpg/v1/fill/w_147,h_88,al_c,q_80,usm_0.66_1.00_0.01,blur_2,enc_auto/909970_02e69d0deda948b78bf06267286f741a.jpg)