> For the complete documentation index, see [llms.txt](https://docs.premium-positioning.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.premium-positioning.com/guides/mapit-gis-android.md).

# Mapit GIS (Android)

These steps connect a Mapit GIS (Android) to the Premium Positioning correction network over NTRIP, using Mapit GIS app. They assume you already have your NTRIP credentials.

### Before you start

* Your NTRIP username and password, from your Premium Positioning welcome email or your account on the customer portal.
* Mapit GIS app.
* A working internet connection on the controller or phone.
* A clear view of the sky at the point you are measuring.

### Network settings

These are the same for every Premium Positioning customer. Only your username and password are unique to you.

* Server or host: rtkpremium.xyz
* Port: 2101
* Mountpoint: COMMON
* Protocol: NTRIP

### Steps

1. Check your subscription: The built-in NTRIP client and external RTK corrections require a paid Mapit GIS tier (currently Mapit Pro Plus). The free tier and basic Pro can't connect to a caster. Check Settings or your account and upgrade if NTRIP options are greyed out or hidden.
2. Pair your receiver in Android: Power on your external Bluetooth GNSS receiver and pair it first in Android Settings > Bluetooth (outside Mapit). If prompted for a PIN, use the one in your receiver's manual (commonly 0000 or 1234). The receiver must output NMEA and accept RTCM3.
3. Connect the receiver in Mapit: In Mapit GIS open the menu > Settings > External GNSS (the external/Bluetooth receiver section). Enable the external/direct connection and pick your paired receiver. Look for 'External GNSS' and a connect / 'Direct connection' toggle (wording varies by version).
4. Confirm raw GNSS is live: Open the GPS Info sheet (location/accuracy panel). You should see a position and a fix status like 'GPS (SPS)' with metre-level accuracy - confirming the Bluetooth link works before adding NTRIP.
5. Open NTRIP Corrections: Settings > NTRIP Corrections (NTRIP Client). Tap 'Add Configuration' (or '+' / 'Add') to create a new caster profile. Label varies by version.
6. Name the profile: Give it a recognisable name, e.g. 'Premium Positioning' - just a label for your reference.
7. Enter the Premium Positioning caster: Host (Caster/Server address) = rtkpremium.xyz, Port = 2101, Protocol = NTRIP. If a version field shows, V1 or V2 both work; leave the default if unsure.
8. Enter YOUR NTRIP credentials: In Username and Password enter the personal credentials from your welcome email - unique to your account; do not use anyone else's. There is no generic login.
9. Select the COMMON mountpoint: Tap the Mountpoint field. Mapit fetches the source table and lists mountpoints (often by distance, with a search box). Select COMMON, or type it directly.
10. Keep Send GGA enabled: Leave 'Send GGA' on (the default) - the caster needs your approximate position via GGA. A \~10 s interval is fine.
11. Point corrections at your receiver and connect: If asked where to send corrections, choose your Bluetooth receiver so the RTCM3 is forwarded to it. Tap Connect (or Start Service / play). If it fails, re-check the username/password, Host rtkpremium.xyz, Port 2101, and that COMMON is selected.
12. Confirm an RTK Fixed solution: Open the GPS Info sheet and watch GPS (SPS) → DGPS → RTK Float → RTK Fixed (green NTRIP indicator). Wait for 'RTK Fixed' (\~1 - 3 cm, low correction age) before collecting. Initial fix typically 15 - 60 s under open sky.

### If the fix will not hold

The built-in NTRIP client requires a paid Mapit tier (currently Mapit Pro Plus). Mapit GIS is brand-agnostic and works with many Bluetooth GNSS receivers (must output NMEA and accept RTCM3). Menu/button labels ('External GNSS', 'NTRIP Corrections', 'Add Configuration', 'Send GGA') vary slightly between versions and Android/iOS - match the closest equivalent. Keep 'Send GGA' enabled. Work under open sky for a reliable fix.

For more, see RTK corrections troubleshooting and Fix inconsistent RTK accuracy on site.

### Need help

Support is available 24/7. Include your receiver model, the mountpoint, the solution status, and the correction age when you get in touch.