stereoDigitized fromGeneratedSurface fromOtherContours
This enumeration is used by Contours.
stereoDigitized: Contours generated manually through photogrammetric methods.
fromGeneratedSurface: Contours derived automatically from a digital terrain model (such as a digital elevation model or a triangulated irregular network).
fromOtherContours: Contour derived manually or automatically from other contours.