Latitude

Validates that a value is a latitude coordinate in decimal degrees, in the range -90 to 90.

Configuration

Config flag	Type	Description
`latitude`	`boolean`	When `true`, requires the value to be a valid latitude.

const form = useForm({
  initialValues: { lat: '' },
  validationSchema: {
    lat: { latitude: true },
  },
});

import { V } from 'formify-js';

V.latitude();

Scenario	Message
Value is not a valid latitude	`Must be a valid latitude`

Value	Result
`'51.5074'`	✅ Valid
`'-33.8688'`	✅ Valid
`'90'`	✅ Valid (pole)
`'91'`	❌ Invalid (out of range)
`'12.3N'`	❌ Invalid (direction suffix not accepted)

Values outside -90 … 90 fail.
Direction suffixes (N/S) and degree symbols are not accepted — use plain decimal degrees.
Combine with latitude and longitude to validate coordinate pairs on separate fields.