OpenLayers, WMS MinScaleDenominator and MaxScaleDenominator

Asked Apr 24 '18 at 13:41

Active Apr 24 '18 at 13:41

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In my OpenLayers map application I display many WMS layers from different sources. Some of them have display scale restrictions set by MinScaleDenominator and MaxScaleDenominator tags in WMS GetCapabilities.

What I want to achieve is to notify my application users to zoom in or zoom out to view particular layer.

How can I compare current map view zoom level to MinScaleDenominator and MaxScaleDenominator in OpenLayers?

asked Apr 24 '18 at 13:41

Andžej Miloš

1

does https://gis.stackexchange.com/questions/242424/how-to-get-map-units-to-find-current-scale-in-openlayers help? – Ian Turton Apr 24 '18 at 16:32
helps, thank you! But I'm not sure how to get values of inchesPerMetre and DPI (used in mapScale function)? – Andžej Miloš Apr 26 '18 at 10:29
inches per meter is 12(inches)*3.28084(ft in a metre) - DPI is usually 72 or 96 or so – Ian Turton Apr 26 '18 at 10:31

OpenLayers, WMS MinScaleDenominator and MaxScaleDenominator

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