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G. Navratil, J. Ernst, G. Muggenhuber, E. Unger, R. Mansberger:
"Cadastre as the Backbone for Spatial Infrastructure: Strengths, Potentials, and Challenges";
Talk: 6th EALD International and Interdisciplinary Symposium, Ljubljana; 2016-09-01 - 2016-09-03.

Geodata are describing the economical, ecological, physical, legal, and social reality of land. They are collected at different dates by various stakeholders in different formats, different details, different scales, and in different reference frames. Nowadays capturing is mainly done by GNSS or remote sensing technologies on a global scale, whereas in previous times conventional surveying methods were applied on local scale.
A cadastre is a national large-scale data set and as such provides spatial information at the lowest administrative level and-in combination with the land register-gives evidence of the legal situation of land. Therefore, the cadastre in combination with other data sources is imperative for the documentation of current status, the planning of intended changes, and the implementation of the plans. Combination of all these data requires metadata and a unified spatial reference frame.
In Austria cadastral data have been collected and updated at local level for 200 years. The advantage of this approach is that local mass movement and its legal effects can be addressed with proper procedures. But this may lead to inconsistencies when combining the cadastre with data acquired with GNSS-based technologies. These inconsistencies at regional scale need additional solutions based on the procedures on local level.
The presentation outlines the state of the art of the land administrative system in Austria. Challenges for georeferencing objects represented by points, lines, and areas as well as their implications on legal status and legislation are presented. Spatial divergences may result from the inhomogeneity of the national grid due to the historical development or the changes of reality, e.g., tectonic movements and land slides. Solutions to overcome or mitigate these effects are illustrated by examples.

Geodata are describing the economical, ecological, physical, legal, and social reality of land. They are collected at different dates by various stakeholders in different formats, different details, different scales, and in different reference frames. Nowadays capturing is mainly done by GNSS or remote sensing technologies on a global scale, whereas in previous times conventional surveying methods were applied on local scale.
A cadastre is a national large-scale data set and as such provides spatial information at the lowest administrative level and-in combination with the land register-gives evidence of the legal situation of land. Therefore, the cadastre in combination with other data sources is imperative for the documentation of current status, the planning of intended changes, and the implementation of the plans. Combination of all these data requires metadata and a unified spatial reference frame.
In Austria cadastral data have been collected and updated at local level for 200 years. The advantage of this approach is that local mass movement and its legal effects can be addressed with proper procedures. But this may lead to inconsistencies when combining the cadastre with data acquired with GNSS-based technologies. These inconsistencies at regional scale need additional solutions based on the procedures on local level.
The presentation outlines the state of the art of the land administrative system in Austria. Challenges for georeferencing objects represented by points, lines, and areas as well as their implications on legal status and legislation are presented. Spatial divergences may result from the inhomogeneity of the national grid due to the historical development or the changes of reality, e.g., tectonic movements and land slides. Solutions to overcome or mitigate these effects are illustrated by examples.

Kataster, Referenzrahmen, Bezugssystem, Raum-Zeit

http://publik.tuwien.ac.at/files/PubDat_251037.pdf