Geodesea Ltd provide support for Victoria Deep water terminal quay wall survey

Geodesea Ltd recently provided hydrographic survey support for a hi-res multibeam survey of the Victoria Deep terminal quay wall on the River Thames, for Hanson Ltd on behalf of the Port of London Authority. Acquired with Hypack/Hysweep using 700kHz R2Sonic 2024 and 400kHz Reson 7125 both with POSMV 320.

UAV work on the Thames

Luckily our pilot Nick found a weather window... Just!

Geodesea Ltd contracted for Hi-Res Multibeam Sonar and Vessel based laser surveys for Tideway works on behalf of Port of London Authority

Geodesea Ltd have recently been contracted by the PLA for Hi-Res Multibeam Sonar and Vessel based laser surveys for the Tideway monitoring surveys on the River Thames.
Optech ILRIS 3D laser being acquired in Hypack/Hysweep with Applanix POSMV 320 in parallel with Reson 8125 MBES data acquisition.

 

Tide Gauge / Flood Monitoring Device

We have recently re-built our Tide Gauge/Flood Monitoring Device. Less moving parts, more reliability.

Measures ranges up to 10m in all weather condtions. IP66 rated.

Connects to the internet to provide re-time level data info, and can contact individuals/stakeholders with information on levels, rate of change of levels and early warnings when certain levels have been breached via Twitter.

For more info, see www.geodesea.com/geotide

Geodesea Ltd now using Beamworx AutoPatch

Geodesea Ltd have recently started using Beamworx AutoPatch for Patch Testing.

A brilliant bit of software which saves time and eliminates potential operator bias during calibration routines, not to mention the identification of lever arm offset and SVP measurement errors.

  

Q3-2016 Bathymetric Surveys for Tideway JV Contractors Completed

Geodesea Ltd continue to be sub-contracted by the Port of London for the delivery of bathymetric monitoring surveys in support of the ongoing Tideway Tunnel works on the River Thames. Surveys for the JV contractors BMB an Flo have now been acquired and are being processed presently.

Surveyors: JP Cheminade & M Fisher

MBMax LOG File Generator

Just created an MBMax log file generator, as last time I checked the Hypack version only allowed to merge 2 existing log files and I have been creating them in TextPad for use in MBMax.

May or may not be of use - it is to us! Down load HERE and change *.txt to *.exe

Requires .NET v4.0.0.0 or later

Can easily be embedded into Hypack shell too :-)

Geodesea Ltd now using Beamworx AutoClean

Geodesea have recently purchased a Beamworx Autoclean licence for MBES and vessel based LiDAR data cleaning.

Simple and robust point cloud cleaning program for Bathymetric and LiDAR point data. In times where software becomes more and more complex we present a new cleaning tool that is focused on day to day cleaning on board of survey vessels or near site. Very easy to learn, easy to operate and to install program. Due to its flexible import and export it will fit in every workflow. 

Geodesea provide hydrographic personnel to BCH in Antarctica

In February 2016 Geodesea Ltd provided hydrographic personnel and software to support Bristol Channel Hydrographic (www.bristolchannelhydrographic.com) with their high resolution multibeam survey of Biscoe Wharf in Rothera, Antarctica, on behalf of Holder Ltd and the British Antarctic Survey (BAS).

One of the more technically challenging jobs, and also the most scenic!

A couple of new utility programs

Two new utility programmes available for use Tidal Thames which shows tidal differences on predictions for London Bridge on the River Thames and GPS to UTC Seconds Converter which is helpful for various GPS survey applications.

Geodesea Presenting at Hydrographic Society Southern Region AGM & Evening Meeting

Presented an overview of the Thames Tideway Tunnel MBES and vessel based laser surveys to to  the Hydrographic Society Southern Region AGM & Evening Meeting on 20.01.2016

Portable Sonar logging on Android Smartphone

Geodesea Ltd have recently bought an Ohmex SonarLite. Not the most modern of SBES systems, but with a few tweaks we've now got it logging georeferenced soundings over a bluetooth connection on an Android smartphone :-)

PLA Live Tides on Geodesea Website

The freely available Thames Live Tide data (provided by Port of London Authority) is now also shown HERE

For more information, see the  PLA Hydrographic Website

CSO Hi-Res surveys for Thames Water

Geodesea Ltd were recently asked to process and render hi-resolution multibeam bathymetry data of several Combined Storm Outlet structures located within the River Thames for Thames Water PLC.

Comparison of several datasets over the same structures allows for utilities providers to get a clear picture of the sedimentation regimes within the structures on a temporal, as well as spatial, basis.

Volumetric analysis was carried out using Hypack and Fledermaus software packages.

Thames Tideway Tunnel Construction Video

Interesting animation on the planned construction of the Thames Tideway Tunnel

https://vimeo.com/93163541

Early start in London this morning....

Updated Thames Tideway Tunnel Project Grid Conversion v1.01

v1.01 - a  recent application update in support of ongoing hydro consultancy works for the Tideway Tunnel Bathy Monitoring programme. 

Geodesea Ltd provide hydrographic consultancy services for Landscope Engineering in support of Environment Agency bathy survey of the Upper Thames

Geodesea Ltd recently provided hydrographic consultancy services to Landscope Engineering in support of an EA multibeam survey contract. The survey was 38km stretch of the Upper Thames between Osney & Rushey in the Oxford area.
The survey vessel used was the Landscope owned & operated SV Polecat equipped with R2Sonic 2024 & Applanix POSMV.
Geodesea Ltd provided assistance in the mobilisation & calibration of online systems, provision of an online hydrographic surveyor and data processor plus training to Landscope engineers in the use of Hypack/Hysweep for data processing.

Surveyors: JP Cheminade & Joanna Andrzejewska

RS232 to USB latency minimisation

Having to mobilise equipment in a short  time , with limited equipment & space it is sometimes necessary to use Rs232 to USB serial converters. But the inherent latency is not ideal for a survey setup.

When data is sent from a serial device to a USB converter it is cached on the USB converter until one of two things happens:

• Transfer size – More then x BYTES are collected or
• Latency timer – More then n Milliseconds (ms) expirer.

Luckily we can set the Transfer size, and latency timer.

Most USB to 485 devices that I have used have the ability to set the transfer size and the latency timer.

1. Start menu–> Settings –> Control panel –> device manager –> Ports (COM & LPT) –>{Select your USB to RS485 converter}
2. Right click and select “Properties”
3. Select the “Port Settings” tab
4. Click the “Advanced” button 
5. Change the Latency Timer (mSec) to 1ms or the lowest possible setting (I use 4ms).
6. Change the USB Transfer sizes to 256 - the largest NMEA data string is 82 bytes. 
7. Save and close.

Geodesea Ltd Continue to Provide Hydrographic Personnel for the Tideway Tunnel Bathymetric Monitoring Programme

Geodesea Ltd are continuing provision of IHO CatA Hydrographic Surveyors to the Port of London Authority in support of the ongoing Thames Tideway Tunnel Bathymetric Monitoring Programme. We are now in the 5th round of surveys (site specific areas), and due to kick off the 3rd full river survey at the beginning of April 2015.