Description
Append the supplied height in meters, reference type, and datum to a label.
A height or map reference label identifies the coordinate convention attached to a value. Changing the label does not transform the coordinates or convert between vertical datums.
Append the supplied height in meters, reference type, and datum to a label.
When to use this tool
Use Geographic Height Reference Label when you need to preserve or format a supplied geographic reference label.
How to use the tool and how it works
- Enter heightMeters, reference, datumName. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read label. Use the output convention below.
Require reference ellipsoidal, orthometric, or normal and nonblank datumName. Append the supplied height in meters, reference type, and datum to a label.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| heightMeters | Height Meters | Required. Finite number. |
| reference | Supplied height-reference name; adding it does not convert a height datum. | Required. Text; one of "ellipsoidal", "orthometric", "normal"; maximum UTF-16 length 8192. |
| datumName | Datum Name | Required. Text; maximum UTF-16 length 8192. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| label | Formatted label for the supplied components under the convention above. | Required. Text; maximum UTF-16 length 8192. |
{
"input": {
"heightMeters": 132.5,
"reference": "ellipsoidal",
"datumName": "WGS 84"
},
"output": {
"label": "132.5 m ellipsoidal (WGS 84)"
}
}Limitations and assumptions
- This labels rather than converts height; the datum is unverified and geoid/quasigeoid corrections or vertical transformations are not calculated.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use authoritative reference-system definitions and an appropriate coordinate transformation for actual datum conversion.
References
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