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With the Growing usage of smart software that uses the location information, automatic location sensing became a necessity in everyday life. There is the Global Positioning System (GPS) which is a satellite based navigation system made up of a network of 24 satellites placed into orbit. GPS is widely used to track objects located outdoors, but it is not suitable for indoors. Indoor positioning of objects is studied. Reference node positions are investigated with respect to localization accuracies. Performance of indoor localization with LANDMARC system is re-evaluated and some improvements are introduced during measurements. k-NN and weighted k-NN algorithms are used and positioning accuracies less than a grid space across the test area are obtained.
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