[NOTE: That web page advocates a setting on the Baja peninsula. My comments on that are at the end of this post.]
Despite the Baja proposal, the web page makes an excellent point about abstract maps. The author uses the example of locating Jerusalem by creating an abstract model from the text of the Book of Mormon. We would never find the real Jerusalem that way, as he demonstrates very well. It is well worth reading.
You'd have the same problem if you used the text of the Bible--unless you already knew where Jerusalem was from extrinsic evidence, which is exactly how we know where Jerusalem was.
IOW, Jerusalem is a pin in the map when we read the Bible. We can find other locations by reference to Jerusalem. That's why, in my opinion, the Lord gave us the New York Cumorah as a pin in the map for Book of Mormon geography questions.
The importance of Letter VII and the New York Cumorah becomes apparent as you continue reading the analysis of abstract maps:
You can read the proposal that Cumorah was a desert hill in Baja and decide for yourself, but the Baja scenario is another in a long list of otherwise viable Book of Mormon settings that reject or ignore Letter VII. I think you could make an argument for just about any place in the world with some imaginative geography work; that's why this whole geography issue has never been resolved. And that's why having a pin in the map is essential, which in turn is why Letter VII is essential.
Now, if they would just take a look at Letter VII and the North American setting...
Comments on Baja. I'm quite sure the Hill Cumorah in New York does not fit in a Baja-based geography. Because I think any proposed geography needs to account for Oliver Cowdery's Letter VII, the Baja concept doesn't work for me. (They propose Cumorah as a hill in the desert, suggesting that the Colorado river satisfies the requirements of a land of many waters, etc.) If you're wondering why I'm citing a web page that argues for a different geography than I do, I look for good arguments and evidence everywhere, and I recommend consideration of every proposed Book of Mormon geography, if only so we all know what everyone else is thinking. Unlike the citation cartel, I trust readers to make up their own minds. In the spirit of the First Amendment, more speech is better than less speech.