Jacynthe Pouliot
Professor
Department of Geomatics Sciences
Université Laval
Canada

Biography
Jacynthe Pouliot is a full professor at the Department of Geomatics Sciences at Université Laval, and currently the head of the Unit. She is an active researcher at the Center for research in Geomatics and owns a personal discovery grant from the Natural Research Council of Canada. Her interests are GIS, 3D modeling techniques and the integration of spatial information. She is a member of the Professional association of the Quebec land surveyors.

Abstract
3D Cadastral Representation for Who and for What?

The value added of using 3D models in the context of cadastral application where overlapping properties exist like condominium is discussed by many references and organisations. Nevertheless, most of those proposals do not directly address the user requirements which may differ depending on the user's profile like notaries, stakeholders, land surveyors, decision makers, etc. If we took as a hypothesis that 3D cadastre models may exist and are technically deliverable, a group of researchers try to answer questions about who would be the more interested users, depending on the user's profile what are the most attracted and performing usages and what is the expected content and appearance of such 3D products. The study took place in the context of the province of Quebec based on civil code law, and where a cadastral system exist that do not propose full 3D cadastre but a hybrid solution. This hybrid solution based on the cadastral instructions of the gouvernement du Québec- Foncier Québec who maintains and develops the land registration infrastructure, proposes 2D cadastral plans where the vertical dimension of overlapping properties is represented on external co-ownership plans (mainly vertical profile of the properties). The presentation will discuss the results of surveys made with notaries, municipality and government land managers and land-surveyors. The results show that the user's requirements are quite distinct from the points of view of user's profile and usages and the 3D cadastral products specifications vary in content and in level of details. Technical and administrative difficulties are still in concerned for most interviewed users, even though they are all very interested in such a 3D cadastral representation.