EPSG:10918

COH88 2025 (NAVD88) height

Attributes

Unit: metre

Geodetic CRS: COH88 2025 (NAVD88) height

Datum: Derived California Orthometric Heights of 1988 epoch 2025

Data source: EPSG

Information source: California Spatial Reference Center, Scripps Orbit and Permanent Array Center at Scripps Institution of Oceanography (SOPAC), http://sopac-csrc.ucsd.edu/

Revision date: 2025-07-15

Scope: Geodesy, engineering survey, topographic mapping.

Remarks: Replaces NAVD88 height (CRS code 5703) in California. Supersedes COH88 2017.5 (NAVD88) height from 2025-06-15. State law defines use of US survey feet: see CRS code 10919.

Area of use: United States (USA) - California.

Coordinate system: Vertical CS. Axis: height (H). Orientation: up. UoM: m.

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SimpleMap

Center coordinates
37.27 -119.29

Projected bounds:
32.53 -124.45
42.01 -114.12

WGS84 bounds:
-124.45 32.53
-114.12 42.01

United States (USA) - California.
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Definition: OGC Well Known Text

VERT_CS["COH88 2025 (NAVD88) height",
    VERT_DATUM["Derived California Orthometric Heights of 1988 epoch 2025",2005,
        AUTHORITY["EPSG","1416"]],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AXIS["Gravity-related height",UP],
    AUTHORITY["EPSG","10918"]]

Definition: OGC Well Known Text 2 (2019)

VERTCRS["COH88 2025 (NAVD88) height",
    VDATUM["Derived California Orthometric Heights of 1988 epoch 2025"],
    CS[vertical,1],
        AXIS["gravity-related height (H)",up,
            LENGTHUNIT["metre",1]],
    USAGE[
        SCOPE["Geodesy, engineering survey, topographic mapping."],
        AREA["United States (USA) - California."],
        BBOX[32.53,-124.45,42.01,-114.12]],
    ID["EPSG",10918]]

Definition: ESRI Well Known Text

VERTCS["COH88_2025_NAVD88_height",
    VDATUM["Derived_California_Orthometric_Heights_of_1988_epoch_2025"],
    PARAMETER["Vertical_Shift",0.0],
    PARAMETER["Direction",1.0],
    UNIT["Meter",1.0]]

Definition: PROJ.4

+vunits=m +no_defs +type=crs

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:10918","+vunits=m +no_defs +type=crs");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "VerticalCRS",
    "name": "COH88 2025 (NAVD88) height",
    "datum": {
        "type": "VerticalReferenceFrame",
        "name": "Derived California Orthometric Heights of 1988 epoch 2025"
    },
    "coordinate_system": {
        "subtype": "vertical",
        "axis": [
            {
                "name": "Gravity-related height",
                "abbreviation": "H",
                "direction": "up",
                "unit": "metre"
            }
        ]
    },
    "scope": "Geodesy, engineering survey, topographic mapping.",
    "area": "United States (USA) - California.",
    "bbox": {
        "south_latitude": 32.53,
        "west_longitude": -124.45,
        "north_latitude": 42.01,
        "east_longitude": -114.12
    },
    "id": {
        "authority": "EPSG",
        "code": 10918
    }
}

Definition: GeoServer

10918=VERT_CS["COH88 2025 (NAVD88) height",VERT_DATUM["Derived California Orthometric Heights of 1988 epoch 2025",2005,AUTHORITY["EPSG","1416"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","10918"]]

Definition: MapServer - MAPfile

PROJECTION
	"vunits=m"
	"no_defs"
	"type=crs"
END

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">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 10918, 'EPSG', 10918, '+vunits=m +no_defs +type=crs', 'VERT_CS["COH88 2025 (NAVD88) height",VERT_DATUM["Derived California Orthometric Heights of 1988 epoch 2025",2005,AUTHORITY["EPSG","1416"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","10918"]]');