EPSG:1068

Height Depth Reversal

Attributes

Data source: EPSG

Information source: EPSG Guidance Note #7-2.

Revision date: 2019-02-21

Remarks: This is a parameter-less conversion.

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Formula

Note: These formulas have been transcribed from EPSG Guidance Note #7-2. Users are encouraged to use that document rather than the text which follows as reference because limitations in the transcription will be avoided.

If there is a requirement to either (i) change a height in a source CRS to a depth in a target CRS referenced  to the same vertical datum, or (ii) change a depth in the a source CRS to a height in a target CRS referenced  to the same vertical datum, then the following generic formula can be used:

X2 = –1 * X1

Example

1. Source CRS = MSL height, in which a height = -300m. Then target CRS = MSL depth, and the depth = (-300 * -1) = 300m

2. Source CRS = NAVD88 depth (ftUS), in which a depth = 500 ftUS. Then target CRS = NAVD88 height (ftUS), and the height = (500 * -1) = -500 ftUS
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