Waiting for hours to see you? is it a complete sentence or a fragment

A sentence must contain both a subject and verb.

"Waiting for hours" is a gerund phrase which could be used as a subject, and "to see you" is an infinitive phrase. But both of these cannot be used as a verb in this context.

Since there is no verb, it cannot be a sentence and must be a fragment.

this map shows the geographic distribution of different tidal cycles along some earth's coastlines. areas experiencing tides are marked in yellow and experience one low tide and one high tide each day.