AIS.TR.355 Terrain data sets

• Regulation (EU) 2020/469 found in: ATM/ANS Provision of Services (2017/373) (Feb 2023)

AIS.TR.355 Terrain data sets Commission Implementing Regulation (EU) 2020/469 When terrain data sets are provided in accordance with point [AIS.OR.355](#_DxCrossRefBm1726555999): (a)       terrain data sets shall contain the digital representation of the terrain surface in the form of continuous elevation values at all intersections of a defined grid, referenced to a common datum; (b)       a terrain grid shall be angular or linear and shall be of a regular or irregular shape; (c)       terrain data sets shall include spatial (position and elevation), thematic, and temporal aspects of the surface of the Earth, containing naturally occurring features, excluding obstacles; (d)       only one feature type, i.e. terrain, shall be provided; (e)       the following terrain feature attributes shall be recorded in the terrain data set: (1)       area of coverage; (2)       identification of the data originator er; (3)       data source identifier; (4)       acquisition method; (5)       post spacing; (6)       horizontal reference system; (7)       horizontal resolution; (8)       horizontal accuracy; (9)       horizontal confidence level; (10)     horizontal position; (11)     elevation; (12)     elevation reference; (13)     vertical reference system; (14)     vertical resolution; (15)     vertical accuracy; (16)     vertical confidence level; (17)     recorded surface; (18)     integrity; (19)     date and time stamp; and (20)     unit of measurement used; (f)        Within the area covered by a 10-km radius from the ARP, terrain data shall comply with the Area 2 numerical requirements; (g)       in the area between 10 km and the TMA boundary or a 45-km radius, whichever is smaller, data on terrain that penetrates the horizontal plane 120 m above the lowest runway elevation shall comply with the Area-2 numerical requirements; (h)       in the area between 10 km and the TMA boundary or a 45-km radius, whichever is smaller, data on terrain that does not penetrate the horizontal plane 120 m above the lowest runway elevation shall comply with the Area-1 numerical requirements; and (i)        in those portions of Area 2 where flight operations are prohibited due to very high terrain or other local restrictions and/or regulations, terrain data shall comply with the Area-1 numerical requirements. Terrain data collection surfaces – Area 1 and Area 2 ![Aviation.Bot AI suggestion, not from EASA source: [Image caption skipped for debugging]](/static/files/file_gqs63YSDadR/image095.png) AIS.TR.355 Terrain data sets Commission Implementing Regulation (EU) 2020/469 When terrain data sets are provided in accordance with point [AIS.OR.355](#_DxCrossRefBm647743180): (a) terrain data sets shall contain the digital representation of the terrain surface in the form of continuous elevation values at all intersections of a defined grid, referenced to a common datum; (b) a terrain grid shall be angular or linear and shall be of a regular or irregular shape; (c) terrain data sets shall include spatial (position and elevation), thematic, and temporal aspects of the surface of the Earth, containing naturally occurring features, excluding obstacles; (d) only one feature type, i.e. terrain, shall be provided; (e) the following terrain feature attributes shall be recorded in the terrain data set: (1) area of coverage; (2) identification of the data originator er; (3) data source identifier; (4) acquisition method; (5) post spacing; (6) horizontal reference system; (7) horizontal resolution; (8) horizontal accuracy; (9) horizontal confidence level; (10) horizontal position; (11) elevation; (12) elevation reference; (13) vertical reference system; (14) vertical resolution; (15) vertical accuracy; (16) vertical confidence level; (17) recorded surface; (18) integrity; (19) date and time stamp; and (20) unit of measurement used; (f) Within the area covered by a 10-km radius from the ARP, terrain data shall comply with the Area 2 numerical requirements; (g) in the area between 10 km and the TMA boundary or a 45-km radius, whichever is smaller, data on terrain that penetrates the horizontal plane 120 m above the lowest runway elevation shall comply with the Area-2 numerical requirements; (h) in the area between 10 km and the TMA boundary or a 45-km radius, whichever is smaller, data on terrain that does not penetrate the horizontal plane 120 m above the lowest runway elevation shall comply with the Area-1 numerical requirements; and (i) in those portions of Area 2 where flight operations are prohibited due to very high terrain or other local restrictions and/or regulations, terrain data shall comply with the Area-1 numerical requirements. Terrain data collection surfaces – Area 1 and Area 2