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Geographic Longitude Hemisphere Zero Label Tool

Calculate geographic longitude hemisphere zero label from explicit caller-supplied inputs.

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Description

Append a degree symbol and W or E according to the west flag.

Coordinate labels and tokens encode an axis order, sign convention, or formatting policy. Numeric compatibility and text formatting can diagnose ambiguity, but neither establishes the actual coordinate reference or location.

Append a degree symbol and W or E according to the west flag.

When to use this tool

Use Geographic Longitude Hemisphere Zero Label when you need a supplied geographic label or coordinate-convention diagnostic.

How to use the tool and how it works

  1. Enter magnitude, west. Use the units and conventions below.
  2. Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
  3. Read text. Use the output convention below.

Require magnitude within [0, 180]. Append a degree symbol and W or E according to the west flag.1

Input fieldMeaning and unitsAccepted input
magnitudeMagnitudeRequired. Finite number; minimum 0; maximum 180.
westWestRequired. Boolean.
Output fieldInterpretationReturned shape
textTextRequired. Text; maximum UTF-16 length 8192.
json
{
  "input": {
    "magnitude": 0,
    "west": true
  },
  "output": {
    "text": "0°W"
  }
}

Limitations and assumptions

  • At zero the selected suffix is retained; the tool does not infer hemisphere from a signed longitude. This is text formatting rather than coordinate validation or transformation.
  • 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

Read authoritative coordinate metadata when the actual axis order or reference system matters. Keep original numeric precision and explicit sign conventions rather than inferring them from a plausible label.

References

  1. Calculation and input contract: geography/geographic-longitude-hemisphere-zero-label — tool.io

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