Geodezja
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ISSN 1234-6608
Issue Date
2005
Volume
T. 11
Number
Nr 2
Description
Journal Volume
Geodezja
T. 11 (2005)
Projects
Pages
Articles
An elementary derivation of Knothe's formula concerning subsidence of a point under the influence of exploitation
(Wydawnictwa AGH, 2005) Bugiel, Piotr
The well known S. Knothe's formula on the subsidence of a single point of a non-stationary subsidence trough under the influence of exploitation is derived in an elementary way. An important role plays the interpretation of non-stationary subsidence trough as rheonomous constraints. Such an approach reveals some paradoxical property of the instantaneous troughs, namely they all attain practically the very same maximal subsidence.
The application of factorial analysis in the classification of the attributes of real estates
(Wydawnictwa AGH, 2005) Jasińska, Elżbieta ; Preweda, Edward
When asking about the estimation of the market value of real estates it is very important to define the influence of respective attributes of real estates on their prices. The features of real estates are usually correlated one with another. High correlation between the explaining attributes shows that they explain the same part of the variability of prices, thus from practical and economic point of view, the attributes bringing similar information should be eliminated. To establish the influence of the attributes on the prices of real estates, factorial analysis was applied. Its main application is the reduction of the number of variables and detection of structure in the relationships between variables, i.e. classification of variables. Among several methods of factorial analysis the method of main components was chosen. This method allows the selection of the number of factors by the expert in evaluation of real estate. In the analysis of main components, after selecting the first factor one can define subsequent ones, which maximize the remaining variability. Since every following factor is defined in such a way that the variability not covered by the previous ones could be maximized, subsequent factors are independent from one another. It is a subjective decision to establish a number of selected factors and methods of their selection. Among the most often applied statistical methods, in the paper the Kaiser criterion and talus test were used.
Estymacja parametrów nieliniowych modeli funkcyjnych na potrzeby predykcji rynkowej wartości nieruchomości
(Wydawnictwa AGH, 2005) Barańska, Anna
The basis of modelling real estate unit values is information on prices and qualities of real estates as subject of market turnover or on market values of representative real estates and their attributes. Such a data set constitutes a representative basis of real estates for analysing the market, meeting all criteria of multidimensional random variable. Among different non-linear functions of many variables, in modelling of a real estate unit price or value, multiplicative exponential function is chosen to be examined in relation to the particular attributes. Exponential form of the function assures positive values of real estates and it permits to describe their variability as a monotone function. The model of real estates unit values in form of multiplicative exponential function was analysed as follow $c=B_{0} \cdot B_{1}^{x_1} \cdot B_{2}^{x_2}...B_{m}^{x_m}$, where: $c$ - real estate unit price or unit value, $x_1, x_2,..., x_m$ - real estate attributes, including the attribute of »transaction time«, $B_j$ - estimated model factors, $B_0$ - real estate unit value, for zero of all attributes. Estimation of model parameters may be done in many ways. In the present paper, the run system for Markow method (in form of least squares weighing method) will be submitted. Verification of estimated model proceeds as follows: 1. investigation of model acceptability regarding the values of factors variability as well as the convergence, 2. analysis of model factors significance, 3. analysis of random components symmetry.
Problematyka standardów transferu danych w aspekcie zakresu informacji ewidencji gruntów i budynków
(Wydawnictwa AGH, 2005) Bydłosz, Jarosław
The standards of data transfer from the cadastral system are the subject of this paper. Legal basis, technical instructions and purposes of data transfer from the cadastral system are described in the first part of the paper. In the following, the most popular standards are presented. There are DXF, SWDE and two standards based on XML computer language (GML and LandXML). DXF, GML and LandXML are international standards, SWDE is the Polish standard. Two cadastral objects (parcel and building) are created in the computer program Ewmapa and transferred to both DXF and SWDE standards, for better illustration of analysed problem. Evaluation of these standards and possibilities of further application in cadastral data transfer have been also made in the paper.
Porównanie danych zawartych w systemie IACS w odniesieniu do systemu ewidencji gruntów i budynków
(Wydawnictwa AGH, 2005) Hanus, Paweł
In the paper a problem of using data, contained in cadastre, for the needs of creating data necessary for IACS application in Poland, has been showed. The problem has become especially important after Poland accession to the European Union. Shortly described essential rules of cadastre system and also the ultimate range of grounds data, which are the base for direct determining amount additional payments for agricultural production. It has been stated, that data contained in cadastre are completely sufficient for the aims demanded for IACS system. Comparing data contained in IACS system, one must state, that data referring to the parcel boundaries, do not yield data coming from the cadastre, and moreover they fulfill suitable criteria showed in relevant regulations. However, they are more update then cadastre data. So, one should use them, in cadastre modernization process.