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gsloc: Apple Location Service API for Python

gsloc is a Python library and CLI tool that provides a reverse-engineered interface to Apple's Location Service API. This project is inspired by the work found at GS-LOC on GitHub and aims to simplify querying Apple's location services using MAC addresses of Wi-Fi networks.

What is Apple's GS-LOC Service?

Apple's GS-LOC service is a part of Apple's broader location services, which help in determining the geographical position of a device based on various data sources, including Wi-Fi networks. By providing the MAC addresses of nearby Wi-Fi access points, you can retrieve location data such as latitude, longitude, and accuracy. This service is typically used in devices for enhancing location accuracy especially when GPS data is inadequate or unavailable.

Purpose of the gsloc Tool

The gsloc tool is designed to allow developers and researchers to interact with Apple's Location Service through a Python library or a command-line interface. It is particularly useful for applications and services where location data is critical, such as in geospatial analysis, tracking systems, and in any context where understanding the physical location context is beneficial.

Installation

You need Python 3.7 or higher to use this tool.

pip install gsloc

Usage

Using as a Python library:

from gsloc.core import query

results = query(["94:10:3e:a0:b7:bd"])

Using as a command line tool:

gsloc 94:10:3e:a0:b7:bd # you can enter multiple MAC addresses separated by space

Ouput:

❯ gsloc 94:10:3e:a0:b7:bd
[05/15/24 14:21:34] INFO     2024-05-15 14:21:34,320 - gsloc.core - INFO - Querying Apple location service with MAC addresses: ['94:10:3e:a0:b7:bd']                    core.py:125
                    INFO     2024-05-15 14:21:34,735 - gsloc.core - INFO - Received response from Apple location service.                                               core.py:144
[
    WifiInfo(mac='94:10:3e:a0:b7:bd', channel=153, latitude=37.70825958, longitude=-122.4556961, accuracy=25, altitude=98, altitude_accuracy=4),
    WifiInfo(mac='10:86:8c:45:bc:6e', channel=6, latitude=37.7087059, longitude=-122.45516204, accuracy=27, altitude=96, altitude_accuracy=4),
    WifiInfo(mac='1e:16:89:c6:45:58', channel=6, latitude=37.70783996, longitude=-122.45616912, accuracy=20, altitude=105, altitude_accuracy=4),
    WifiInfo(mac='1e:9d:72:ca:be:6f', channel=1, latitude=37.70779037, longitude=-122.45628356, accuracy=27, altitude=105, altitude_accuracy=4),
    WifiInfo(mac='1e:9d:72:ca:f7:17', channel=6, latitude=37.70855331, longitude=-122.45585632, accuracy=32, altitude=98, altitude_accuracy=4),
    WifiInfo(mac='1e:9e:cc:4d:fa:48', channel=6, latitude=37.70830917, longitude=-122.45615386, accuracy=99, altitude=100, altitude_accuracy=10),
    WifiInfo(mac='1e:9e:cc:4d:fa:4a', channel=6, latitude=37.7082901, longitude=-122.45614624, accuracy=94, altitude=100, altitude_accuracy=10),
    WifiInfo(mac='1e:9e:cc:4d:fa:4d', channel=6, latitude=37.70826721, longitude=-122.45616912, accuracy=87, altitude=107, altitude_accuracy=4),
    ...
]

Or, you can provide a list of MAC addresses in a file and write the output to a GeoJSON file:

94:10:3e:a0:b7:bd
10:86:8c:45:bc:6e
...
gsloc -i macs.txt -o output.geojson