Although 3D cadastre web map offer benefits to, among others, planning and disaster management application domains, they pose some technical constraints to be implemented using current web technologies. Some technical constraints may include field data processing, data compatibility and browser limitations. One of technical solutions in support of 3D data processing is the use of OpenGIS standard i.e. KML in streamlining 3D measurements into the existing cadastre geodatabase. Further, another standard that is useful is X3D. X3D stores and visualizes 3D objects above or below land parcels. Some prospects of the use of those open standards will be illustrated through case studies. First case study is the use of KML as an intermediate format to bridge between CAD with PostgreSQL PostGIS for mapping spacerelated rights. Second case study is the use of cadastre and environment-related data in X3D format in support of rapid mapping for Mt. Merapi post disaster assessments. From those two case studies, technical specifications for developing a solution of a 3D web map suitable for a proposed hybrid cadastre, will be discussed.