Obstacle data (CSV-files)
Obstacle data (CSV)
Obstacle data sets are published in Finland as CSV files according to the breakdown shown below at www.ais.fi/ais/aipobst/aipobst.htm. Data sets do not include obstacles published by NOTAM.
The users shall carefully assess the available data to determine whether the product is adapted to their intended use.
More information regarding obstacle data sets can be inquired from the Finnish Transport and Communications Agency Traficom to which the responsibility for maintaining the air navigation obstacle register was transferred on 01 OCT 2023.
Area 1 obstacles
Data set is an electronic list containing obstacles which are 100 M AGL or higher.
The naming convention for these filenames is ef_efin_area1_obstdata_dd_mmm_yyyy.csv. Dd_mmm_yyyy is the effective date of the file.
Area 2 obstacles
Aerodrome obstacles penetrating obstacle limitation surfaces
Data set is an electronic list containing man-made obstacles, that penetrate ICAO Annex 14 (national aviation regulation AGA M3-6) obstacle limitation surfaces and are over 3 M AGL.
The naming convention for these filenames is ef_efxx_ols_obstdata_dd_mmm_yyyy.csv. Efxx is the aerodrome location indicator and dd_mmm_yyyy is the effective date of the file.
Area 4 obstacles
Data set is an electronic list containing man-made obstacles in Area 4 data collection surface.
The naming convention for these filenames is ef_efxx_nn_area4_obstdata_dd_mmm_yyyy.csv. Efxx is the aerodrome location indicator, nn is the runway designator and dd_mmm_yyyy is the effective date of the file.
Content of the CSV files
CSV file will have the following information from the man-made obstacle separated by semicolon (;):
| Field | Content | Example |
|---|---|---|
| OBST ID | Obstacle identification | EFINOB 10031 |
| TYPE | Type | Mast |
| COORD | Coord in AIP format | 615551.0N 0254354.3E |
| LAT | Latitude in degrees | 61.93083059 |
| LONG | Longitude as degrees | 25.73175845 |
| HGT AGL (FT) | Height AGL in FT | 355 |
| ELEV MSL (FT) | Elevation MSL in FT | 982 |
| LGT COLOR | Color of top light | R |
| LGT TYPE | Type of top light | F |
| LGT INTST | Intensity of top light | LIH |
| LGT HR | Hours of light | HN |
| MARKINGS | Markings | Y |
| Area of coverage | Area of coverage | |
| Identification of the data originator | Identification of the data originator | |
| Data source identifier | Data source identifier | Traficom |
| Horizontal accuracy (m) | Horizontal accuracy in meters | 50 |
| Horizontal confidence level (%) | Horizontal confidence level in percentages | 90 |
| Horizontal resolution (m) | Horizontal resolution in meters | 5 |
| Horizontal extent | Horizontal extent | |
| Horizontal reference system | Horizontal reference system | |
| Vertical accuracy (m) | Vertical accuracy in meters | 30 |
| Vertical confidence level (%) | Vertical confidence level in percentages | 90 |
| Vertical resolution (m) | Vertical resolution in meters | 1 |
| Vertical reference system | Vertical reference system | |
| Geometry type | Geometry type | POINT |
| Unit of measurement | Unit of measurement | ft/m |
| Integrity | Integrity | Routine |
| Date and time stamp | Date and time stamp | 22.3.2017 0.00.00 +00:00 |
ELEV MSL (FT) data is based on N2000 vertical reference system.
On the first line of the CSV file are the field names followed by each obstacle, one per line:
OBST ID;TYPE;COORD;LAT;LONG;HGT AGL (FT);ELEV MSL (FT);LGT COLOR;LGT TYPE;LGT INTST;LGT HR;MARKINGS; Area of coverage;Identification of the data originator;Data source identifier;Horizontal accuracy (m);Horizontal confidence level (%);Horizontal resolution (m);Horizontal extent;Horizontal reference system;Vertical accuracy (m);Vertical confidence level (%);Vertical resolution (m);Vertical reference system;Geometry type;Unit of measurement;Integrity;Date and time stamp
EFINOB 10722;Chimney;630443.769N 214043.992E;63.078824584;21.6788865492;218;234;R;
F;NIL;HN;Y;NIL;NIL;Traficom;NIL;NIL;NIL;NIL;NIL;NIL;NIL;NIL;NIL;POINT;ft/m;NIL;31.12.1984
0.00.00 +00:00
EFINOB 60322;Mast;631853.69N 274132.27E;63.31491388888889;27.692297222222223;575;
1050;W;FLG;LIM;H24;Y;NIL;NIL;Traficom;5;90;5;NIL;NIL;3;90;0.1;NIL;POINT;ft/m;Essential;31.1.2024
22.00.00 +00:00