Database services. Database services. Data Services. HMRC requires the provision of Points of Reference datasets and associated iconography to support compliance activity. It is essentially a list of ‘points of interest’ grouped into a comprehensive set of categories with multiple levels of granularity. In addition to the data describing each of the ‘points of interest’, coordinates and keys are provided so that the data can be added to geographic mapping/analysis technology. Icons are provided with the data so that the various categories can be plotted on an electronic map.