Over the last two decades, Geographic Information Systems (GIS) have replaced the
traditional way of representing and using spatial data. Geographic information systems are
encountered at almost every turn. In this Master's thesis, we explore the foundations of their
functionalities and their history. Spatial analysis is an essential part of how GIS technology
works. They enable us to carry out advanced spatial studies and help us make space-related
decisions. We explored the history of GIS technology and tested the skills and tools needed to
create them. We have designed the Geoisk application that allows the user to make automated
spatial queries in the area of the municipality of Domžale. The application provides the user
with a graphical representation of land parcels that are within an arbitrary distance from two
spatial factors (e. g. distance from bus stops, schools, shops, etc.). The user selects the two
spatial factors and the distance range via graphical interface. The analysis provides
information about the location and spatial distribution of the land parcels that meet the
selected conditions. The complete process of creating a GIS web application using open-
source web tools is described.
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