The baseboards are 720m x 720m ... I don't know why that particular size was chosen ... (and each yellow gird is 10m x10m) ... and the baseboard size is a fixed size ... not changable or shapable.
On my 10,000 baseboard Horseshoe Curve route ... I was driving my RJ Corman-Irvona branch, and the train took an hour to traverse the 40 mile branchline from Medina to the interchange at Cresson.