I did something like that as well as my very basic hand drawn map and he didn't even look at the Google map, just took my hand drawn one. It's a strange requirement as surely a Google map is better.
I agree, this seems to have changed in the past couple of years, but a one off payment to an agent to open a bank account (3 to 5,000 Baht) is nothing like paying an agent 35,000 Baht to get a visa and then being forced to use them every subsequent year or lose the visa.
I did mine in Thailand 2 years ago and also did not pay anything to agents. I also extended it and sailed through in 30 minutes, no corruption, no agents, I just provided the evidence they requested.
The most difficult part is opening a Thai bank account to deposit the 800k.
Seems like people need to pay an agent to do this now, I managed without an agent 2 years ago.
After that it is a case of going to the immigration and asking for a list of requirements and providing the documents required. It seems complicated, but it is not difficult.