Thanks ILYAS
Yes we can somehow come up with ss and s1 values for a certain individual project's site in Pakistan. But it would either be based on some empirical relationship (I doubt the adequacy of using such relationships due to a number of unknown variables involved e.g. the uncertainty in quantifying the ability of local soil to amplify the ground acceleration at site etc.) or based on some international standard or guideline as suggested in the next comment (which again is not intended to provide a detailed seismic hazard within a country).
I was asking for a standard seismic hazard established by the BCP. The reason I am specifically interested in this is as follows.
I was making a web-based application which would provide an interactive online facility to visualize the seismic hazard in Pakistan. The starting point would be to show a benchmark hazard (in the form of various seismic parameters, spectra etc.) which is duly standardized by the country's building code. Later, I plan to incorporate more detailed and recent studies, or may be develop a comparative kind of database to visualize various attempts (e.g. GSHAP, PMD, individual researchers etc.) to quantify seismic hazard within country.
Obviously, the BCP should have been updated to use spectral acceleration as key hazard parameter instead of PGA. With this update, it should have ideally provided the ss and s1 values for whole country down to tehsil level. However, currently it seems like asking for moon.
If you find any information or digitized data related to this, please help.
Thanks
Fawad