Earlier quoted context omitted.
That should be classified as corruption/insider trading and punished as such. In my country that's how politicians and their friends get filthy rich. They know ahead of time where a new highway will be planned so they buy up all the rural land in that area for cheap so that the government will have to buy it from them at inflated prices to build the highway. Then, if a new government comes to power before the highway…
Insider trading is only when you're the insider. If you happen to walk past a geodetist (land surveyer?) on the street measuring something, ask him what'll be built there, and he tells you, you're still not the insider. Otherwise I agree, but in my country they do it differently,... government needs a building for X, someone close to someone in the government buys it for eg. 2mio eur, holds on it for a year or two, b…
The actual crime is using "Material Nonpublic Information" [1] and it does not matter how you obtained it. So, asking an employee what they're building and they ignore the confidentiality agreement to tell you - Nonpublic. Stalking surveyers from public land to find the lots they're commonly around - public.
[1]: https://www.investopedia.com/terms/m/materialinsiderinformat....