U-blox 7 vk-172 gps module can not get correct readings

Recently, one customer complained:

I bought a U-blox 7 from you and I’m giving it some tests right now and I’m not getting correct readings from it. I’m an application developer and I had to add a compensation element to both latitude and longitude in order to get “correct” readings from it.

GPS data to google data need conversion

Here is the link about how to do it https://drive.google.com/open?id=1MwNTrqJtst3Dpl9qH8Mt3UJhs87ODdf9