Paweł Hanus

Spatial analysis of the accuracy of the cadastral parcel boundaries

Abstract Contemporary advancements in technology and the widespread availability of GIS (Geographic Information System) tools offer many possibilities in performing computer-assisted geospatial data analysis. For this type of analysis, the quality of the data is an extremely important factor. In the case of analysis related to parcel boundaries, the quality of the data is mainly determined by the mean errors of the location of the breakpoints of the boundary lines for particular parcels and the origin of the information about the boundary point coordinates. This paper presents new opportunities for analyzing the boundary point position errors and their impact on the course of the boundary lines based on these points. The above-mentioned analysis of boundary errors was conducted in the area of the village of Chocznia. The results of the analysis are presented graphically and analytically to illustrate the distribution of these errors. Clear visualization of the distribution of the errors can be a valuable source of information. The information obtained in such a manner can be used in management processes and for planning agricultural land management work. A rapid assessment of parcel boundary data accuracy with GIS tools could also be used for the selection and classification of areas requiring cadastre modernization or for verification of the data contained within it.

The Impact of Landslide Areas on Municipal Spatial Planning

Abstract Municipal spatial planning is one of the key elements of a national spatial policy and the local land use plan is the most important tool for shaping this policy. The local land use plan, as opposed to the study, is a provision of the local law. The study, however, is mandatory for the whole area of the municipality, while the local land use plan is, in principle, voluntary and subject to certain exceptions. One of the elements which ought to be included in the spatial policy a municipality is taking into account the threats to the safety of its inhabitants and their property, as well as identifying areas of natural geological hazards. Therefore, both the study and the local land use plan of the municipality should include, among others, areas of particular risk related to the subsidence of soil masses, i.e., landslide areas. Landslide areas are of a limited use for investment purposes, including residential, industrial or service development, as particularly vulnerable to the phenomenon of rock masses, eluvium or sediments sliding down slopes under the force of gravity. The purpose of this article is to analyze the legal and economic consequences resulting from changes to the local land use plan, related to the qualification of an area as a landslide area. This paper examines the changes to the local land use plan for the town of Wieliczka, located place on the border of the Outer Carpathians and the Carpathian Foredeep. The transition from a mountainous terrain into a plane gives rise to numerous natural forms of relief which are prone to landslides. The study of landslides in the municipality of Wieliczka conducted in 2008, resulted in changing the qualifications of many areas to areas at risk of soil subsidence. The effects of the study have been reflected in the new local land use plan introduced in 2010.

The concept of estimating usable floor area of buildings based on cadastral data

Abstract Usable floor area is one of the most important spatial attributes of buildings and premises. It is used, for example, to determine the basis for their taxation. Unfortunately, the question of proper determination of usable floor area in Poland has remained problematic for many years, which is closely related to the occurrence of various definitions of usable floor area in the currently binding legal acts. Consequently, usable floor area is not a universal attribute. This means that in certain cases significant discrepancies may occur between the usable floor area of the same structure, determined for different purposes. In addition, despite attempts made to unify the principles for the performance of surveys of building structures and their parts, this requirement still can not be recognized as fully met. Therefore, there is no doubt that the problem of reliability and availability of data defining the usable floor area of buildings is becoming even more important in view of the introduction of the ‘ad valorem’ tax, which has been planned for years. For this reason, this paper proposes a universal, multi-variant method of estimating usable floor area based on geometric and descriptive data of buildings contained in the cadastre. The Authors, taking into account the applicable legal regulations, have considered the possibilities of practical implementation of individual variants of this specific method. They have carried out empirical tests of effectiveness of the proposed approach. They have also defined tasks for which this method of determining the usable floor area of buildings would be particularly useful.