EPSG Library · Levant, Iraq and Turkey

EPSG:22770 — Deir ez Zor / Syria Lambert

Source: EPSG Dataset via PROJ 9.5.1 · Updated 2026-10-05

Summary

EPSG:22770 (Deir ez Zor / Syria Lambert) is a projected coordinate reference system on the Deir ez Zor datum using the Lambert Conic Conformal (1SP) method, with coordinates in metres. Area of use: Lebanon - onshore.

Type: projected
Datum: Deir ez Zor
Units: metre
Axes: X, Y

Definition

EPSG:22770 as published in the EPSG Dataset (PROJ 9.5.1).
Property	Value
EPSG code	EPSG:22770
Name	Deir ez Zor / Syria Lambert
Type	Projected CRS
Datum	Deir ez Zor
Ellipsoid	Clarke 1880 (IGN) (a = 6,378,249.200 m, 1/f = 293.466021)
Prime meridian	Greenwich
Projection method	Lambert Conic Conformal (1SP)
Axes	Easting (X, east, metre); Northing (Y, north, metre)
Scope	Engineering survey, topographic mapping.
Bounding box	35.04° to 42.38° longitude, 32.31° to 37.3° latitude

Area of use

Lebanon - onshore. Syrian Arab Republic - onshore.

Projection parameters

Lambert Conic Conformal (1SP) parameters.
Parameter	Value	Unit
Latitude of natural origin	34.65	degree
Longitude of natural origin	37.35	degree
Scale factor at natural origin	0.9996256	unity
False easting	300,000	metre
False northing	300,000	metre

Example coordinates

A WGS 84 point at longitude 38.71°, latitude 34.805° (inside the area of use) has these coordinates in EPSG:22770:

Computed with PROJ using the EPSG default operation: unavailable until proj_trans is called.
Axis	Value	Unit
X	424,273.858	m
Y	318,075.126	m

At this point the projection scale factor is 0.99962924 and the grid convergence is +0.773244°.

Open this conversion in the coordinate converter

Transformations to WGS 84

Candidate operations from the EPSG Dataset, best first as ranked by PROJ.
Operation	Accuracy	Area of use
axis order change (2D) + Deir ez Zor to WGS 84 (5) + axis order change (2D)	5 m	Syria - onshore.
axis order change (2D) + Deir ez Zor to WGS 84 (6) + axis order change (2D)	0.5 m	Syria - Deir area (35°22'N, 40°06'E)
axis order change (2D) + Deir ez Zor to WGS 84 (2) + axis order change (2D)	5 m	Syria - Deir area (35°22'N, 40°06'E)
axis order change (2D) + Deir ez Zor to WGS 72BE (1) + WGS 72BE to WGS 84 (1) + axis order change (2D)	7 m	Syria - Deir area (35°22'N, 40°06'E)
axis order change (2D) + Deir ez Zor to WGS 84 (3) + axis order change (2D)	999 m	Syria - Al Whaleed area
axis order change (2D) + Deir ez Zor to WGS 84 (4) + axis order change (2D)	1 m	Syria - Shaddadeh area (36°N, 41°E)

Transformations change the datum, so each has an accuracy and an area of use. Choose the most accurate one that covers your data and record its name. See datum transformations.

Definitions and downloads

PROJ string

+proj=lcc +lat_1=34.65 +lat_0=34.65 +lon_0=37.35 +k_0=0.9996256 +x_0=300000 +y_0=300000 +ellps=clrk80ign +units=m +no_defs +type=crs

A PROJ string cannot carry every EPSG detail (axis order, datum ensemble, transformations). Prefer WKT2 or the EPSG code itself.

Proj4js definition used by the converter

+proj=lcc +lat_1=34.65 +lat_0=34.65 +lon_0=37.35 +k_0=0.9996256 +x_0=300000 +y_0=300000 +ellps=clrk80ign +units=m +towgs84=-190.421,8.532,238.69 +no_defs

Datum shift from Deir ez Zor to WGS 84 (5) (EPSG accuracy 5 m), the best single Helmert operation for this area of use. Where PROJ prefers a grid-based or multi-step operation (see the table above), results can differ by up to that operation's accuracy.

WKT2:2019

PROJCRS["Deir ez Zor / Syria Lambert", BASEGEOGCRS["Deir ez Zor", DATUM["Deir ez Zor", ELLIPSOID["Clarke 1880 (IGN)",6378249.2,293.466021293627, LENGTHUNIT["metre",1]]], PRIMEM["Greenwich",0, ANGLEUNIT["degree",0.0174532925199433]], ID["EPSG",4227]], CONVERSION["Syria Lambert", METHOD["Lambert Conic Conformal (1SP)", ID["EPSG",9801]], PARAMETER["Latitude of natural origin",34.65, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8801]], PARAMETER["Longitude of natural origin",37.35, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8802]], PARAMETER["Scale factor at natural origin",0.9996256, SCALEUNIT["unity",1], ID["EPSG",8805]], PARAMETER["False easting",300000, LENGTHUNIT["metre",1], ID["EPSG",8806]], PARAMETER["False northing",300000, LENGTHUNIT["metre",1], ID["EPSG",8807]]], CS[Cartesian,2], AXIS["easting (X)",east, ORDER[1], LENGTHUNIT["metre",1]], AXIS["northing (Y)",north, ORDER[2], LENGTHUNIT["metre",1]], USAGE[ SCOPE["Engineering survey, topographic mapping."], AREA["Lebanon - onshore. Syrian Arab Republic - onshore."], BBOX[32.31,35.04,37.3,42.38]], ID["EPSG",22770]]

Downloads

22770.prj — ESRI WKT for shapefiles
22770.wkt — OGC WKT2:2019

FAQ

What is EPSG:22770?

Where can EPSG:22770 be used?

Its area of use is: Lebanon - onshore. Syrian Arab Republic - onshore.

Is EPSG:22770 in metres or degrees?

EPSG:22770 is projected, so coordinates are easting and northing in metres, not degrees.

How do I convert EPSG:22770 to latitude and longitude?

Transform from EPSG:22770 to EPSG:4326 (WGS 84). In GeoCAD Bridge open the coordinate converter with EPSG:22770 preselected, enter easting and northing, and choose WGS 84 as the target.

How accurate is the transformation from EPSG:22770 to WGS 84?

The most accurate EPSG transformation listed here is “axis order change (2D) + Deir ez Zor to WGS 84 (6) + axis order change (2D)”, with a stated accuracy of 0.5 m for Syria - Deir area (35°22'N, 40°06'E). Always check the area of use before applying it.

Coordinate systems

Articles

Tools

References

IOGP. EPSG Geodetic Parameter Dataset, epsg.org/crs_22770.
PROJ 9.5.1 / pyproj 3.7.2, used to compute every value on this page.

Cite this page

GeoCAD Bridge. “EPSG:22770 — Deir ez Zor / Syria Lambert.” GeoCAD Bridge EPSG Library, updated 2026-10-05. https://www.geocadbridge.com/epsg/22770/