Alaska Multibeam Hydrographic Survey and RTK GNSS Topographic Survey

August 14, 2014 by eTrac

eTrac is the prime contractor for a 3-year hydrographic survey contract with the US Army Corps of Engineers, Alaska district.  A recent Port Condition Survey was conducted in Unalaska, Alaska.  The survey was conducted in June, 2014 and involved multibeam hydrographic surveys, RTK GNSS topographic surveys, a static GNSS control network survey, differential leveling, locating all new navigation aids, setting new monuments, and acquiring aerial photographs.

Google Earth Oblique View 1

Multibeam data was acquired using an R2Sonic 2022 coupled with an Applanix POSMV Wavemaster V5 Position and Motion System.

 

3D view of the bathymetric terrain and breakwater anchors

3D view of the bathymetric terrain and breakwater anchors

 

The hydrographic multibeam data and RTK GNSS topographic data were processed using Hypack, QPS Qinsy, and QPS Qloud. Leica Geo Office was used to process differential leveling data. Trimble Business Center was used to process the static GNSS control network.  AutoCAD Civil 3D was then used to model the data.

The hydrographic multibeam data and RTK GNSS topographic data were processed using Hypack, QPS Qinsy, and QPS Qloud. Leica Geo Office was used to process differential leveling data. Trimble Business Center was used to process the static GNSS control network. AutoCAD Civil 3D was then used to model the data.

 

Anchors and cables were profiled using 3D and 2D views in QPS Qloud.

Anchors and cables were profiled using 3D and 2D views in QPS Qloud.