Position a map with GPS

For the blue dot to land in the right place, Mapvera needs the real-world latitude and longitude of each level's four corners. The positioning tool makes this easy: it drops your level image onto a live street map, and you nudge, stretch, spin and fade it until it sits exactly over the real building. One click then captures the four corners — no coordinates to look up by hand.

Before you start

The tool needs a level image to overlay, and it's worth turning the dot on for the level first so your work has an effect.

1. Add the level's image

   On the Levels tab, make sure the level has its map image uploaded. Without an image, the tool tells you to add it first and won't open.

2. Open the GPS tab

   In the editor's tab strip, choose GPS, then expand the level you want to position.

3. Enable the dot for the level (optional but sensible)

   Tick Enable GPS blue dot for this level so the corners you capture actually drive a dot. You can capture corners without this ticked, but nothing will show to visitors until it is.

Open the positioning tool

Click 📍 Position on map on the level. A full-screen map opens with your level image laid over it as a semi-transparent overlay, with corner handles for dragging. If you've positioned this level before, it opens right where you left off, framed to the saved corners.

Jump to the right place

1. Search for the address

   Type an address or place name into the Search box at the top and press Enter (or click Search). The map jumps there and moves your image with it, so the overlay is right in front of you, ready to fine-tune.

   Search is powered by OpenStreetMap. If a search finds nothing, try a nearby landmark or a simpler address.

2. Zoom in on the building

   Scroll or pinch to zoom the street map until you can clearly see the building outline you're matching to. The closer you zoom, the more precisely you can line things up.

Line the image up

A floating toolbar gives you four ways to adjust the overlay. Switch between them as often as you like — start rough with Resize and Rotate, then perfect the fit with Distort.

Made a mess? Reset

Click ↺ Reset to drop the image back as a fresh, correctly-proportioned box in the current view — undoing any stretch or rotation without losing your place on the map. It's the quickest way to recover if the overlay ends up twisted or off-screen.

Capture the corners

1. Check the fit one last time

   Fade the image down with Opacity and confirm all four corners sit on the matching real-world corners of the building.

2. Click ✓ Capture corners

   The tool reads the latitude and longitude of each of the four corners, fills them into the level's Top-left, Top-right, Bottom-left and Bottom-right boxes, and a ✓ GPS set badge appears on the level.

3. You're done — it's already live

   Capturing corners saves and publishes the map automatically. There's no separate Save step for this — the calibration is live for visitors straight away.

   Prefer not to commit yet? Use Cancel instead of Capture to close the tool without changing anything.

What Mapvera stores

Capturing writes four coordinate pairs for the level — one per corner — each to seven decimal places (roughly centimetre precision). Mapvera uses them to project a visitor's live GPS position onto your artwork, so the blue dot lands in the right spot however the level is scaled, cropped or rotated.