AIOC95 depth


Unit: metre

Geodetic CRS: AIOC95 height

Datum: AIOC 1995

Data source: EPSG

Information source: BP

Revision date: 2021-04-20

Scope: Oil and gas exploration and production.

Remarks: Also used by AIOC and BP as a height system for engineering survey at Sangachal terminal (see CRS code 5797). AIOC95 datum is 1.7m above Caspian datum and 26.3m below Baltic datum.

Area of use: Azerbaijan - Caspian offshore and onshore Sangachal terminal.

Coordinate system: Vertical CS. Axis: depth (D). Orientation: down. UoM: m.

Center coordinates
40.24 50.19

Projected bounds:
37.89 48.66
42.59 51.73

WGS84 bounds:
48.66 37.89
51.73 42.59

Azerbaijan - Caspian offshore and onshore Sangachal terminal.
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Definition: Well Known Text (WKT)

VERT_CS["AIOC95 depth",
    VERT_DATUM["AIOC 1995",2005],

Definition: ESRI WKT


Definition: PROJ.4

+vunits=m +no_defs +type=crs

Definition: JavaScript (Proj4js)

proj4.defs("EPSG:5734","+vunits=m +no_defs +type=crs");

Definition: JSON

    "$schema": "https://proj.org/schemas/v0.4/projjson.schema.json",
    "type": "VerticalCRS",
    "name": "AIOC95 depth",
    "datum": {
        "type": "VerticalReferenceFrame",
        "name": "AIOC 1995"
    "coordinate_system": {
        "subtype": "vertical",
        "axis": [
                "name": "Depth",
                "abbreviation": "D",
                "direction": "down",
                "unit": "metre"
    "scope": "Oil and gas exploration and production.",
    "area": "Azerbaijan - Caspian offshore and onshore Sangachal terminal.",
    "bbox": {
        "south_latitude": 37.89,
        "west_longitude": 48.66,
        "north_latitude": 42.59,
        "east_longitude": 51.73
    "id": {
        "authority": "EPSG",
        "code": 5734

Definition: GeoServer

5734=VERT_CS["AIOC95 depth",VERT_DATUM["AIOC 1995",2005],UNIT["metre",1],AXIS["Depth",DOWN],AUTHORITY["EPSG","5734"]]

Definition: MapServer - MAPfile


Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+vunits=m +no_defs +type=crs">
	<Layer srs="+vunits=m +no_defs +type=crs">

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 5734, 'EPSG', 5734, '+vunits=m +no_defs +type=crs', 'VERT_CS["AIOC95 depth",VERT_DATUM["AIOC 1995",2005],UNIT["metre",1],AXIS["Depth",DOWN],AUTHORITY["EPSG","5734"]]');

Definition: OGC WKT

VERT_CS["AIOC95 depth",VERT_DATUM["AIOC 1995",2005],UNIT["metre",1],AXIS["Depth",DOWN],AUTHORITY["EPSG","5734"]]

Definition: OGC WKT 2 (2019)

VERTCRS["AIOC95 depth",VDATUM["AIOC 1995"],CS[vertical,1],AXIS["depth (D)",down,LENGTHUNIT["metre",1]],USAGE[SCOPE["Oil and gas exploration and production."],AREA["Azerbaijan - Caspian offshore and onshore Sangachal terminal."],BBOX[37.89,48.66,42.59,51.73]],ID["EPSG",5734]]