[ENHANCEMENT] Issue warning about model applicability when using the due regard model over land

### Relation

The due regard model was trained using track data for operations over the Atlantic and Pacific oceans and consisted of over 10,000 flight hours. This is documented in the [ATC-397 technical report](https://apps.dtic.mil/docs/citations/ADA589692). The `UncorEncounterModel` class and `track` method can be used to create geodetic tracks based on samples from the due regard model. The `track` method has two inputs, `lat0_deg` and `lon0_deg`, that defines where a geodetic track should be translated and rotated.

However the method does not warn the user if the desired geodetic coordinates are representative or appropriate for the model. Specifically, the due regard model was trained using tracks flown only over the oceans; the model may not be applicable for tracks operating due regard over land.

#### ATC-397 Citation

J. D. Griffith, M. W. Edwards, R. M. Miraflor, and A. J. Weinert, “Due Regard Encounter Model Version 1.0,” Massachusetts Institute of Technology, Lincoln Laboratory, Lexington, MA, Project Report ATC-397, Aug. 2013.

### Description

When using the dueregard_v1.txt model parameter file, warn the user about the model's training data and assumptions, if they attempt to generate tracks over land.