Primary Control

Geomatics Uk Ltd offer installation of primary control using Trimble GNSS receivers establishing a primary control network. Setting control points calculation positions using the OS Active RTK network for precise positioning. Permanent ground markers established.

Accurate establishment and maintenance of a Primary Control Network is essential to ensure successful dimensional control over a project.

We can provide survey control at all stages of a project whether it be a small or large scale scheme.

Benefits of installing a primary control network:

· Meet high tolerance demands of architects
· Setting out to highest degree of accuracy
· Precise Positioning set using the OS Active RTK network
· Datum information acquired from Ordanance Survey
· Integrated hardware and software systems (digitise co-ordinates to input data into other systems such as Total Station)

 Why use Geomatics Uk Ltd for Primary Control Network:

Our experience surveyors are specifically trained to use Trimble GNSS receivers  supplemented with GNSS systems for larger developments

We ensure integrity is maintained within your Primary Control Network ensuring high degrees of accuracy

Setting Out:

· Piling
· Line and level steelwork
· Groundworks
· Drainage
· Pre-cast elements
· Architectural metalwork
· Cladding
· 2D and 3D co-ordinate systems
· Landscaping

Site Control:

· Check existing Primary Survey Control established by others
· Establishment of the Primary Survey Control for a project
· Establish FFL’s and level datum’s on site

Ordnance Survey Primary Control:

· Surveying Ground markers will be installed and held into position using postcrete

· A Trimble R10 GNSS system will be used to establish a local base station positioned to the Ordnance Survey Active GNSS Network using observation data. This data will be post processed using Trimble Business Centre.

· A Site traverse will then be performed using a Trimble/Lecia 1” Total Station and a traverse kit.  The Raw data will be calculated inside N4ce and a least square analyst will be carried out.

· A level traverse will then be performed using a Leica DNA03 digital level and a 2m Invar staff with bar code.

Primary Control (Local Datum):

· Surveying Ground markers will be installed and held into position using postcrete.

· A Site traverse will then be performed using a Trimble/Lecia 1” Total Station and a traverse kit.  The Raw data will be calculated inside N4ce and a least square analyst will be carried out.

· A level traverse will then be performed using a Leica DNA03 digital level and a 2m Invar staff with bar code.