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Spatly

Bounding box tool

Bounds

Width × Height
67.11 km × 50.04 km
Area
3358 km²
Centre
41.025000, 29.000000

Copy the box

[W,S,E,N][28.6, 40.8, 29.4, 41.25]
?bbox=28.6,40.8,29.4,41.25
Overpass40.8,28.6,41.25,29.4
WKTPOLYGON ((28.6 40.8, 29.4 40.8, 29.4 41.25, 28.6 41.25, 28.6 40.8))
GeoJSON{"type":"Polygon","coordinates":[[[28.6,40.8],[29.4,40.8],[29.4,41.25],[28.6,41.25],[28.6,40.8]]]}
CSVminX,minY,maxX,maxY 28.6,40.8,29.4,41.25

Your data never leaves the browser. Drag corners or the centre handle, draw a new box, or type the bounds. The bboxfinder you always wanted.

— , —1 feature
HowHow it works

Bounding box tool, step by step

  1. Step 1

    Draw or type the box

    Press Draw and drag a rectangle on the map, drag the corner and centre handles, or type the west/south/east/north bounds. Drop a file to fit the box to its extent.

  2. Step 2

    Copy any format

    Get [minX, minY, maxX, maxY], the ?bbox= query string, Overpass/OSM order, WKT, a GeoJSON polygon and CSV — each with a copy button.

  3. Step 3

    Read the tile ranges

    The z 0–14 table lists the XYZ tile x/y ranges the box covers, for cache seeding or scoped downloads. Share the box as a link or open it in the studio.

PrivateRuns in your browser

Your data never leaves the page

Every conversion, measurement and export happens client-side. Nothing is uploaded, logged or stored — you can even use this offline once the page has loaded. Only “Open in Studio” sends data, and only after you sign in.

Go furtherBuild a live map dashboardRead the guide
FAQQuestions

Good to know

What order are the coordinates in?
The array output is [minX, minY, maxX, maxY], i.e. [west, south, east, north] in longitude/latitude — the order used by GeoJSON, Turf and Mapbox. The tool also gives the comma string for API queries and the south,west,north,east order that Overpass and some OSM tools expect, each labelled so you never guess.
How do I get a bounding box from a place instead of drawing?
Paste coordinates in any of the accepted formats, or load a GeoJSON/KML/GPX/CSV file and the tool fits the box to its extent. You can then nudge the edges with the handles.
What are the tile ranges for?
For each zoom level 0–14 the table lists the XYZ tile x/y ranges the box covers, so you can pre-seed a tile cache, scope a download, or size a request. It uses the standard Web Mercator (EPSG:3857) tiling scheme.
How is the area calculated?
Area and the width/height in kilometres are computed on the WGS84 ellipsoid via a geodesic formula, so they stay accurate away from the equator — not a flat degrees-times-degrees approximation.
Does my data leave the browser?
No. Drawing, parsing and every conversion run entirely client-side. Only pressing Open in Studio uploads anything, and only after you sign in.