Map features

Print & export

A composed map sheet — title, legend, scale bar, attribution, date — rendered entirely in the browser at up to 300 dpi.

Try it: the printer button in the top-left control stack. Pick A4 landscape and 300 dpi, then take the PDF, the PNG, or send it to the browser's print dialog.

How it works

A hidden clone of the map is created at the target paper size and pixel ratio, sharing the live style — including every overlay you have switched on. Once it reports idle, its canvas is composed onto a layout canvas together with the legend, a rounded scale bar and the attribution collected from all active sources.

Paper: current view, A4 or A3, landscape or portrait
Resolution: 96, 150 or 300 dpi — everything in the layout scales with it
Legend images and swatches are drawn into the sheet, not screenshotted
PDF pages are real paper sizes: an A4 export measures 297 × 210 mm and prints without "fit to page"
No server, no upload — the map never leaves the browser

The PDF is the composed sheet placed on the page, centred inside 10 mm margins. It is embedded as PNG rather than JPEG: a map is fine lines and small text, exactly what JPEG artefacts ruin. jsPDF only loads when someone actually asks for a PDF — it is the heaviest module in the client.

Export what you see, not survey-grade The scale bar is computed for the exported extent, but this is not a true-to-scale plot: label sizes and symbols scale with the pixel ratio. A server-side renderer for scale-true PDF can be added behind the same dialog later — the interface is reserved for it.

Configuration

Print is on by default. The meta.title becomes the pre-filled sheet title, and layer legends flow into the sheet automatically:

Narrowing the choices

A top-level print block decides what the dialog offers — useful when an organisation wants one format on one paper size and no discussion:

          "print": {
            "formats": ["pdf"],
            "sizes": ["A4-landscape"],
            "dpi": [300],
            "elements": ["title", "legend", "scalebar", "attribution", "date"]
          }

Everything is optional; the defaults are PNG and PDF, current view plus A4 in both orientations, 96/150/300 dpi, and all sheet elements. Dropping an entry from elements removes it from the composed sheet — a map without a title block, or without the date, is one key away.