Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
| Technology | Location | Energy Consumption | Privacy | |||
|---|---|---|---|---|---|---|
| Granularity | Range | Geolocation | Altitude | |||
| GPS | Typically 5m | Worldwide | Absolute | Can Detect | High | Low |
| Bluetooth | NA | 10m – 100m | NA | Partially Detect | Low | High |
| RFID | NA | 1 cm – 25m | Relative | Cannot Detect | Low | High |
| Wi-Fi | NA | 50m | Relative | Cannot Detect | Moderate | High |
| NFC | NA | 4cm –10cm | Relative | Cannot detect | Low | High |
| GSM Location | 50m –250m | 5km – 70km | Relative | Cannot Detect | Medium | Low |
