Generally, morphometrics (from the Greek: "morph," meaning shape or form, and "metron”, meaning measurement) comprises methods of extracting measurements from shapes. In most cases applied to biological topics in the widest sense. Schools of morphometrics are characterized by what aspects of biological "form" they are concerned with, what they choose to measure, and what kinds of questions they ask of the measurements once they are made. In many cases involves calculating angles, areas, volumes and other quantitative data from landmark and segmentation data.