Function addReference

Adds a CoordinateReference to this reference provider.

From the moment a reference is added to this reference provider it can be retrieved from the getReference method and isValidReferenceIdentifier will return true for the reference's identifier.

There are two typical scenarios where this method can be used:

• To add a CoordinateReference got from the parseWellKnownText method
• To add a cartesian CoordinateReference created by createCartesianReference

  const reference = parseWellKnownText(wktString);
  if (reference && reference.identifier) {
    // Add new reference to the ReferenceProvider if not present
    if (!isValidReferenceIdentifier(reference.identifier)) {
      addReference(reference);
    }
  }
  // Later, the reference can be obtained using the identifier
  const ref = getReference(reference.identifier);

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