In collaboration with Grontmij, CTK conducts various kinds of ground surveys. Sophisticated GPS equipment is used for measuring points revealed by aerial photos. These measurements are translated into coordinates that help to produce digital maps for specific surveys requested by clients.

The field team of CTK tackle these survey tasks with professionalism and expertise. They have the capacity to conduct various kinds of ground surveys applying differential GPS method to fulfill their tasks. The resulting survey data is automated using Leica Ski Version 2.3 and MOVE3 from Grontmij. Standard equipment, that is, the Leica GPS system 200/300 is what CTK and Grontmij uses for conducting these ground surveys. The equipment can be flexibly used in any mode of transport and the receivers set as required for the best output.

Some of the types of survey works conducted by CTK are:

• Establishment of Geodetic Controls
• Deformation Measurements and Monitoring
• Cadastral Surveys
• Topographic Surveys
• Construction and Setting-Out of Road Alignment
• Hydrographic Surveys
• Photo Identification and Interpretation
• Remote Sensing

CTK and Grontmij ensure that GPS data acquisition and processing is tailored to the standards set by the Ghana Survey Department. Tailor-made data formats produced for clients usually match up to this standard.

Various processes are used for the executing ground survey and may involve one or more of the following procedures:

• Configuration
• Planning
• Project management
• Data import
• Data processing
• Viewing and Editing
• Least-squares adjustment
• Datum, geoidal models
• Projection, Ellipsoids
• Transformations
• Coordinate upload
• Rinex, etc