mml-taustakartta.html

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<div id="map"></div>

<style>

#map {

height: 1024px;

}
</style>

<script>
var map = L.map('map').setView([60.1015, 24.5613], 13);

L.tileLayer('http://tiles.kartat.kapsi.fi/taustakartta/{z}/{x}/{y}.jpg', {
    attribution: 'Maanmittauslaitos'
}).addTo(map);
</script>