Load a WMS-Layer

WMS stands for Web Map Service. WMS produces maps of spatially referenced data dynamically from geographic information. These maps are rendered in a pictorial format for example PNG, GIF or JPEG. The operations can be done using a standard web browser which submitt requests in form of a URL. The OGC WMS specification standardizes the way in which maps are requested by clients and the way that servers describe their data holdings.

Clients

A growing number of clients supporting WMS or WFS standards.

• ArcGIS
• Quantum GIS
• UDIG
• OpenLayes - pure javascript library for displying map data in most web browsers

Requests

There are differnt types of requests, but only two are required by any wms server:

• GetCapabilities - returns parameters about the WMS and the available layers
• GetMap - with parameters provided, returns a map image

Add WMS layer

If you want to integrate a WMS-Layer to QGIS 3 follow these steps:

1. Open Data Source Manager icon
2. Click WMS/WMTS.
3. Type a namme for the new WMS connection e.g. BKG DTK250(Digitale Topographische Karte 1:250,000, Bundesamt für Kartographie and Geodäsie, Frankfurt).
4. Type the URL : http://sg.geodatenzentrum.de/wms_dtk250
5. Click OK
6. Click Connect
7. Now a list of all downloadable layers appears.
8. Mark one of the layers and click Add

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• OpenStreet Map layer