ASSUMPTIONS OF THE DEVELOPMENT OF THE THEMATIC SERVICE OF THE AVERAGE PROPERTY TRANSACTION PRICES

One of the main objectives of the project "IRIS – The development of the Integrated Real Estate Information System - Phase II" is the development and inclusion of the average transaction prices thematic portal, based on the data from the Register of Prices and Property Values, in the Integrated Real Estate Information System. The paper presents the foundation of the development of the thematic service of the average property transaction prices. The range of data collected from the Register of Prices and Property Values and a cadastre for this thematic portal, have been defined. The methods of determination of apartments’ average transaction prices have been proposed and verified for different spatial units. The scope of information and methods of its cartographic presentation have been presented. In addition, possible areas of application of information obtained from the thematic portal have been stated. The paper includes examples of calculations and cartographic visualizations based on the data from the Register of Prices and Values for the area of the Capital City of Warsaw, concerning prices of apartments on the secondary market in 2016.