The supplied material provides a building reference and a location category rather than one canonical map image. Use those as a directory, then confirm locations, unlock conditions, and availability on your current in-game map.
Official Big Ambitions screenshot — source.
Plan trips by task
Before travelling, group purchases, rental checks, installation visits, and staff-related tasks by area. This makes the map useful as an operational tool rather than just a list of landmarks.
Official Big Ambitions screenshot — source.
Compare the property, not only the district
For a new business, check the individual building's size and suitability before committing. A similar-looking location may not support the layout or business plan you have in mind.
Keep an in-game reference open
Community lists can lag behind updates. Use the game map and help information as the final authority when a building or service does not appear where an older reference expects it.