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Web app to debug visibility of scale dependent WMS layers

Home Page: https://arbakker.github.io/getmap-scale-calculator/

CSS 5.27% HTML 6.27% JavaScript 88.45%
wms openlayers6 cartography

getmap-scale-calculator's Introduction

GetMap Scale Calculator

Application to debug visibility of scale dependent WMS layers. Calculates the scale denominator for a WMS request.

Popular WMS servers extend WMS service with dpi parameters, source:

  • MapServer with MAP_RESOLUTION=value
  • GeoServer with FORMAT_OPTIONS=dpi:value
  • QGIS Server with DPI=value

Example WMS GetMap requests to use:

bro-bodemkaart:

https://geodata.nationaalgeoregister.nl/bzk/bro-bodemkaart/wms/v1_0?SERVICE=WMS&VERSION=1.3.0&REQUEST=GetMap&FORMAT=image%2Fpng&TRANSPARENT=true&layers=view_soil_area&CRS=EPSG%3A28992&STYLES=&WIDTH=1634&HEIGHT=1288&BBOX=171319.68%2C430456.32%2C193280.64%2C447767.04&TRANSPARENT=TRUE&MAP_RESOLUTION=72&FORMAT_OPTIONS=dpi:72&DPI=72

kadastralekaartv3:

https://geodata.nationaalgeoregister.nl/kadastralekaartv3/wms?SERVICE=WMS&VERSION=1.3.0&REQUEST=GetMap&FORMAT=image%2Fpng&TRANSPARENT=true&layers=perceel&CRS=EPSG%3A28992&STYLES=&WIDTH=2881&HEIGHT=1247&BBOX=190289.61%2C442282.47%2C191499.63%2C442806.20999999996&MAP_RESOLUTION=96&FORMAT_OPTIONS=dpi:96&DPI=96

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