preferred cadastral parcel area defined by cadastral registers and spatial units for land administration நில அளவை நிலப்பகுதி நில நிர்வாகத்திற்கான நில அளவை ஆவணங்கள் மற்றும் இடஞ்சார்ந்த அலகுகளால் வரையறுக்கப்பட்ட பகுதி preferred contour line on a map joining points of equal elevation preferred coordinate reference system coordinate system that is related to an object by a datum preferred digital elevation model digital representation of ground surface topography or terrain preferred feature abstraction of real-world phenomena preferred feature attribute characteristic of a feature preferred feature concept concept that may be depicted as a feature in a geographic dataset preferred gazetteer directory of instances of a class or classes of features containing some information regarding position preferred geodetic datum datum describing the relationship of a two- or three-dimensional coordinate system to the Earth preferred map projection method of representing the curved surface of the Earth on a plane preferred metadata data about data preferred orthophoto aerial photograph or satellite image geometrically corrected so that the scale is uniform preferred scale ratio of a distance on a map to the corresponding distance on the ground preferred spatial resolution linear dimension on the ground represented by the width of a sample (pixel) of a digital image preferred toponym proper name of a place or geographic feature