Towards a cooperation between the registry holders of the large scale topographic map and the cadastral map

Abstract

This thesis focuses on the cadastral map and the Key-register Large Scale Topography (BGT) of the Netherlands. The two maps are different because of its history, its purpose and its registry holders. Yet, the BGT is often used as a tool for referencing the cadastral boundaries with the surrounded topography. If the maps are used together there is change that dissimilarities occur where lines are expected to coincide. In the past there was a large scale fine tuning of both maps called project ‘kaartverbetering’. But over time the amount of differences increases, due to unmatched workflows. A poll addressed to the BGT registry holders indicates that they are willing to cooperate with Kadaster to create more consistency between both maps. They can offer local knowledge of cadastral map and the BGT, but they can also supply test areas of which they know the hard topography has a high geometric accuracy. If the same area in the cadastral map is of lower quality it can be used to for an update. The other poll send to the users of the cadastral map, indicated that dissimilarities between the two maps ensures annoyances. Furthermore, between the different user groups is a varied demand for geometric accuracy. Eventually there is a clear need for more clarity around the cadastral map and this can be offered after a necessary internal check-up at Kadaster. If the (measuring) details and quality features of the map are clear, cooperation can be sought with the BGT registry holders for enduring cooperation for pursuing consistency between the both maps. Thereby attention should be paid for the image Kadaster has through its acts in history.