1. A method, executed by at least one processor of a computer, comprising:receiving data of a printed circuit board;
creating a pixelized representation for a conductor layer of the printed circuit board based on the data of a printed circuit board, the pixelized representation having two types of pixels: conductor pixels and dielectric pixels;
analyzing the pixelized representation to identify conductor paths in a direction, the conductor paths being formed by some or all of the conductor pixels;
analyzing the pixelized representation to separate the conductor pixels into net pixels and isolated pixels, the net pixels being pixels on at least one of the conductor paths, and the isolated pixels being pixels on none of the conductor paths;
computing an effective thermal conductivity property value in the direction for a section or a whole of the conductor layer based on a number of the isolated pixels, a number of the net pixels and a number of total pixels in the section or the whole of the conductor layer; and
storing the effective thermal conductivity property value on a non-transitory computer-readable medium.