Location Based Services (LBS)

Reference Database

A beacon based positioning service is only as good as the quality of data in the reference database. Overlay Media has invested heavily in the production of a high quality, comprehensive map of the UK and parts of continental Europe. This data was collected using a team of dedicated drivers collecting Cell-ID information along every motorway, A-road, and most B-roads throughout the whole of the UK. Whilst expensive, this exhaustive approach to data collection has resulted in the creation of a high-quality radio map. A subsection of the database representing a small part of London is shown below. This figure illustrates that cell coverage in highly populated urban environments requires thousands of short range cells.

The Overlay Media reference database contains the position of approximately 350,000 cell positions. The position of these cells was calculated using approximately 200 million measurement samples.

This data is kept up-to-date by applications using the moLocate location service.

Overview | Background | Reference database | Tools | Service

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