AIS.TR.360 Obstacle data sets

When obstacle data sets are provided in accordance with point AIS.OR.360:

(a)     obstacle data items are features that shall be represented in the data sets by points, lines or polygons;

(b)     all defined obstacle feature types shall be provided and each of them shall be described according to the following list of attributes:

(1)     area of coverage;

(2)     identification of the data originator;

(3)     data source identifier;

(4)     obstacle identifier;

(5)     horizontal accuracy;

(6)     horizontal confidence level;

(7)     horizontal position;

(8)     horizontal resolution;

(9)     horizontal extent;

(10)    horizontal reference system;

(11)    elevation;

(12)    vertical accuracy;

(13)    vertical confidence level;

(14)    vertical resolution;

(15)    vertical reference system;

(16)    obstacle type;

(17)    geometry type;

(18)    integrity;

(19)    date and time stamp;

(20)    unit of measurement used;

(21)    lighting; and

(22)    marking;

(c)      obstacle data for Areas 2 and 3 shall be collected in accordance with the following obstacle collection surfaces:

(1)     the Area 2a obstacle collection surface has a height of 3 m above the nearest runway elevation measured along the runway centre line, and for those portions related to a clearway, if one exists, at the elevation of the nearest runway end;

(2)     the Area 2b obstacle collection surface has a 1,2 % slope extending from the ends of Area 2a at the elevation of the runway end in the direction of departure, with a length of 10 km and a splay of 15 % to each side; obstacles less than 3 m in height above the ground need not be collected;

(3)     the Area 2c obstacle collection surface has a 1,2 % slope extending outside Areas 2a and 2b at a distance of not more than 10 km from the boundary of Area 2a; the initial elevation of Area 2c shall be the elevation of the point of Area 2a at which it commences; obstacles less than 15 m in height above the ground need not be collected;

(4)     the Area 2d obstacle collection surface has a height of 100 m above the ground; and

(5)     the Area 3 obstacle collection surface extends 0.5 m above the horizontal plane passing through the nearest point on the aerodrome movement area;

(d)     in those portions of Area 2 where flight operations are prohibited due to very high terrain or other local restrictions and/or regulations, obstacle data shall be collected and recorded in accordance with the Area 1 numerical requirements;

(e)     the obstacle data product specification, supported by geographical coordinates for each aerodrome included within the dataset, shall describe the following areas:

(1)     Areas 2a, 2b, 2c and 2d;

(2)     the take-off flight path area; and

(3)     the obstacle limitation surfaces;

(f)      obstacle data sets shall contain the digital representation of the vertical and horizontal extent of the obstacles; and

(g)     obstacles shall not be included in terrain data sets.

Obstacle data collection surfaces – Area 1 and Area 2