A foldable bicycle includes a central portion of the frame, which defines the bicycle’s geometry, that is substantially rigid. The method comprises registering a first and a second images of at least partially overlapping spatial regions of the sample and processing data from the registered images to obtain integrated image data comprising information about the sample, said information being additional to that available from said first and second images. The cuttings, optionally mixed with drilling mud andor soil, are converted to the useful structures by pozzolanic andor cementitious reactions after being mixed with suitable other materials andor are bonded into the useful structures by asphaltic materials.