English: Gene map of tobacco chloroplast DNA. Data was taken from this paper, and input into a Open document spreadsheet to calculate the degree and radian measures, and to generate the SVG data.
Each DNA segment is identified with a path id in the source SVG(albeit not labeled with a visible text object)
Segments with labels on the outside are located on the A strand, segments with labels on the inside are located on the B strand. Segments narrower than the surrounding ones (the notches) indicate introns. Unlabeled faded segments represent open reading frames.