A method for determining an edge profile of a custom decorative article to be installed in an installation area is disclosed, the installation area having a perimeter having a plurality of corners. A computing device receives data indicative of a plurality of coordinates corresponding to the plurality of corners of the perimeter of the installation area. Based on at least first, second, and third coordinates respectively corresponding to first, second, and third corners of the plurality of corners of the perimeter of the installation area, the computing device determines dimensional and/or geometric characteristics of a pair of opposed portions of the edge profile that, in an installed position, are configured to meet to form a corner of the custom decorative article when installed at the second corner of the perimeter of the installation area.