Help needed to decode a map database

Hi, First post here. and im a newbe.
I have an old ios database file that is appartently in binary.
And id like to decode to read to gps co-ordinatees (my old favorite map loactions)
Without knowing which way to proceed, ive tryed opening it up in hex and using various online decoders to no avail.

How difficult is this taks I seak?

And which way should proceed?

Thanks in advance