Pick a map area and get the four GPS bounds the Guided Trail System needs, or split any image into a grid of named tiles ready for the /tiles folder. Everything runs in your browser — no uploads, no server, no copyright risk for us.
Use the map below to find your trail area. Choose a basemap, navigate to your location, then click "Draw Square" and drag on the map to select the area you want your trail map to cover.
These are the four values the Guided Trail System needs in Admin → ⊞ Map Bounds. Click "Copy bounds" to copy all four as a text block you can paste in.
The selection is always a perfect square. The Guided Trail System's tile grid is square (e.g. 3×3, 4×4), so a square map area gives you the cleanest tile layout. If your trail area isn't square (e.g. long and thin), draw a square that covers the whole area — you can later exclude tiles in the tile splitter to drop the parts you don't need.
Getting an image of this area: This tool gives you the GPS bounds but cannot capture the map image itself (browser security prevents it). To get an image:
1. Use the Fullscreen button on the map to expand it to fill your screen, then take a screenshot of the area you've selected (use your OS screenshot tool — Snipping Tool on Windows, Cmd+Shift+4 on Mac). Use this as a reference only — see the copyright note above.
2. Use your council GIS viewer — many NZ councils (Auckland Council GeoMaps, Wellington, Christchurch) allow you to download aerial imagery of your property under fair use for personal reference. Check your council's terms.
3. Commission a custom map — see Tier 3 in the pricing page. We can create an illustrated map for you with no copyright issues.
Upload the map image you've prepared (or screenshot you've taken as reference), choose your grid size, and download a ZIP of correctly-named tile images ready to drop into the /tiles folder.
Copyright reminder: Only upload images you have the right to use. If you screenshotted Google Maps or council GIS imagery, treat it as reference only — don't ship it as your actual trail map. Redraw or commission a custom version.
The Guided Trail System supports grids from 1×1 (single tile) up to 12×12 (144 tiles). 3×3 (9 tiles) is the default. Larger grids mean smaller file sizes per tile but more files to manage.
Naming convention: 3×3 uses the 1a.png–1i.png names. Any other grid uses R{row}C{col}.png names (e.g. R0C0.png, R1C2.png). The tool generates both correctly — matches the app exactly.
Below is a preview of how your image will be split. Click any tile to exclude it — excluded tiles are saved as solid black placeholder PNGs (not omitted from the ZIP) so the app still finds them. This is how you handle non-rectangular trail areas: draw your full grid, then exclude the corners or edges you don't want shown.
Click the button below. The tool will split your image, generate the ZIP, and download it to your computer. This can take 5–20 seconds for large images or 12×12 grids.
What to do with the ZIP: Unzip it locally. You'll find tile files named 1a.png–1i.png (3×3) or R0C0.png–R{r}C{c}.png (other grids). Upload all of them to the /tiles folder on your hosting (replacing any existing files). Then set the matching grid size in Admin → 🖼 Tiles → Apply Grid.