how to convert satellite latitude & longitude to x,z unity coordinates?

Hello every one , I have GPS latitude & longitude of my real object in world and reading them from file (like TXT Or Json ). I want show my object runtime over my terrain in unity 3d . I want show my object over terrain in new location (object Monitoring). Could you suggest me best practice to convert lat/long coordinate to x,z unity coordinate . please Help me to solve this problem .