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devices/hololens/hololens-spaces.md
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@ -17,17 +17,25 @@ In the Windows 10, version 1803 update for Microsoft HoloLens, the mapping data
The map database is stored securely, with access only available to the internal system. The database is never available to a user of the device, even when plugged into a PC or when using the File Explorer app. When BitLocker is enabled, the stored map data is also encrypted. The map database is stored securely, with access only available to the internal system. The database is never available to a user of the device, even when plugged into a PC or when using the File Explorer app. When BitLocker is enabled, the stored map data is also encrypted.
## Frequently asked questions ## Frequently asked questions
**How does Wi-Fi data get used by HoloLens and where is the data stored?** **How does Wi-Fi data get used by HoloLens and where is the data stored?**
As long as WiFi is enabled, map data will be correlated with a WiFi fingerprint, even when not connected to an actual WiFi network/router. This is because the MAC address and signal strength (i.e. WiFi fingerprint) of a router is available without connecting to it. Network identification (i.e. SSID, MAC address) is not sent to Microsoft, and all WiFi references are kept local on the HoloLens.
Wi-Fi fingerprint data (MAC address and signal strength) is stored locally to help correlate hologram locations and map sections stored within HoloLens’ database of known spaces. It’s secured locally, inaccessible to users, and never sent to Microsoft via the cloud or via telemetry. Wi-Fi fingerprint data (MAC address and signal strength) is stored locally to help correlate hologram locations and map sections stored within HoloLens’ database of known spaces. It’s secured locally, inaccessible to users, and never sent to Microsoft via the cloud or via telemetry.
**Does HoloLens need to be connected to the internet?** **Does HoloLens need to be connected to the internet?**
No, internet connectivity is not required. The MAC addresses of access points within reach can be obtained without being connected or authenticated. No, internet connectivity is not required. The MAC addresses of access points within reach can be obtained without being connected or authenticated.
This also means that if Wi-Fi is disabled, the space search can still happen; HoloLens will need to search more of the map data within the spaces database, and finding holograms can take slightly longer. This also means that if Wi-Fi is disabled, the space search can still happen; HoloLens will need to search more of the map data within the spaces database, and finding holograms can take slightly longer.
HoloLens will sense and remember spaces even when WiFi is disabled, by securely storing the sensor data when holograms are placed. Without the WiFi info, the space and holograms may be slightly slower to recognize at a later time, as the HoloLens needs to compare active scans to all hologram anchors and map sections stored on the device in order to locate the correct portion of the map.
**Since HoloLens no longer requires you to select a space when Wi-Fi is disabled, how does it find the space automatically?** **Since HoloLens no longer requires you to select a space when Wi-Fi is disabled, how does it find the space automatically?**
HoloLens will visually compare the currently scanning data from the sensors to locally stored spaces in the entire spaces database. It will locate holograms faster if the Wi-Fi fingerprint reference (same MAC address and signal strength) can be found, to narrow down the number of spaces to compare. HoloLens will visually compare the currently scanning data from the sensors to locally stored spaces in the entire spaces database. It will locate holograms faster if the Wi-Fi fingerprint reference (same MAC address and signal strength) can be found, to narrow down the number of spaces to compare.
@ -36,8 +44,8 @@ HoloLens will visually compare the currently scanning data from the sensors to l
There are two settings in **Settings > System > Spaces**: There are two settings in **Settings > System > Spaces**:
- Select **?** to delete nearby holograms, clearing the map data and anchored holograms for the current space - Select **Delete nearby holograms** to delete nearby holograms, clearing the map data and anchored holograms for the current space. A new map section would be created and stored in the database for that location once Holograms are again placed in that same space.
- Select **?** to delete all holograms, clearing all locally stored map data and anchored holograms. - Select **Delete all holograms** to delete all holograms, clearing all locally stored map data and anchored holograms. No holograms will be rediscovered and any holograms need to be newly placed to again store map sections in the database.
**Where is the database of map data stored and how can it be accessed or secured?** **Where is the database of map data stored and how can it be accessed or secured?**