# How to convert hex data to decimal degree latitude and longitude? [closed]

I have been trying to decode GPS coordinates (latitude and longitude) which is in HEX format, and the documentation doesn't have a clear explanation, please help me out. I'm adding some examples below.

latitude 0x414F51 = +28.758963 dd(decimal degree)

longitude 0x45429B = +077.627784dd(decimal degree)

screenshot of the documentation

official documentation

## closed as unclear what you're asking by peter ferrie, perror, TechLord, julian♦Feb 11 at 4:24

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your screenshot probably contains example data and not real values

first of all both longitude and latitude are 4 bytes as per your documentation

and there is an example of normal packet in your documentation

based on that packets data lat and long are as follows

``````4E    41 4F 51 53  N   AOQS

45    42 9B 7D 5C  E   B›}\
``````

these are normal IEEE float

``````:\>xxd -s 94  -l 1 foo.bin
000005e: 4e                                       N

:\>xxd -s 95  -l 4 foo.bin
000005f: 414f 5153                                AOQS

:\>xxd -s 99  -l 1 foo.bin
0000063: 45                                       E

:\>xxd -s 100  -l 4 foo.bin
0000064: 429b 7d5c                                B.}\

:\>cdb -c ".formats 414f5153;q" cdb | grep -i float
Float:   low 12.9574 high 0

:\>cdb -c ".formats 429b7d5c;q" cdb | grep -i float
Float:   low 77.7448 high 0

:\>
``````

reverse geocoding this location is as shown in screen shot

• Here is hex to floating point converter, gregstoll.com/~gregstoll/floattohex – Navaneeth M Feb 9 at 4:26
• what for ? there are infinite such convertors floating around in fact i have written such a convertor as a windbg extension googit f2h – blabb Feb 9 at 6:28