Map gene expression data on SVG images

Hello everyone,

I am interested in using these SVG images (http://help.brain-map.org/display/api/Downloading+and+Displaying+SVG), and want to know how a “sample name” in a gene expression matrix is mapped to a path ID in an SVG image. In other words, if I know a path ID in SVG, how can I use it to trace the corresponding sample in an expression matrix? Is such mapping/trace available on the ALLEN BRAIN MAP?

Regards