Obstacle location and geometry

According to the ICAO Annex 15, obstacles are be coded as point, line or polygon, for which also the height (above surface), elevation (above geoid / mean sea level) are provided. In addition, AIXM enables the coding of more complex situations, such as obstacles made of parts, the provision of horizontal and vertical extents for each part, etc. The coding of these location and geometry elements are explained in this section.