Did you read my post? :no:
Well, believe me, you are confused about market value of land 
Anyhow, let me tell you something. Worth of any land is dependent on permission of use for that land. If government would like to sell Faisal Mosque (Islamabad) with conditions that it cannot be demolished, purpose of Faisal Mosque use would not change, no shops or selling would be allowed on the Faisal Mosque premises, than Faisal Mosque would be worthless and land Faisal Mosque is built would be useless too.
Same is true for land PSM is built. The land is valueless unless government gives permission that owner of PSM could do anything with the land, even demolish PSM and convert that land into whatever they like. If that would not be the case than value of PSM would be dependent on what Steel Mill makes in profit (as Steel Mill is business venture, not charity for anyone who keep that Mill).
Other thing you should know is that, all lands used to build Steel Mill is leased land (on 100 years lease) and has permission for only one use (Steel Mill), so land has to be valued with that in mind and that means, it has at most nominal value.