View source for 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 [[wikipedia:Url |URL]]. The [[wikipedia:Open Geospatial Consortium |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

[[File:WMS.png]]

==Add WMS layer==
If you want to integrate a WMS-Layer to QGIS 3 follow these steps:
# Open {{button|text=Data Source Manager}}  [[Image:QGIS_3.0_datasource.png|30px]]
# Click {{button|text= WMS/WMTS}} [[File:Addwms.png|100px]].
# {{mitem|text= Layers --> New}}. Type a name for the new WMS connection e.g. {{typed|text= BKG DTK250}} (Digitale Topographische Karte 1:250,000, Bundesamt für Kartographie and Geodäsie, Frankfurt).
# Type the URL : {{typed|text=http://sg.geodatenzentrum.de/wms_dtk250}}
[[File:qgis_add_dop20.png|400px]]
# Click {{button|text=OK}}
# Click {{button|text=Connect}}
# Mark the layer ''dop20'' and click {{button|text=Add}}
[[File:qgis_wms_dop20.png|800px]]

==Add Google Maps layers==
# Open {{button|text=Data Source Manager}}  [[Image:QGIS_3.0_datasource.png|30px]]
# To add the Google Maps map service in QGIS 3 simply, go to XYZ Tiles in the Browser panel.
# Right-click on XYZ Tiles and choose XYZ Connections {{button|text=New}}.
# Enter the name for the WMS Service fo example: {{typed|text=Google Satellite}}
# Copy and paste the URL: https://mt1.google.com/vt/lyrs=s&hl=en&x={x}&y={y}&z={z}
# Adjust the maximum zoom level {{typed|text=19}}, confirm with OK.
# To view inside QGIS go to the Browser panel. Unfold the XYZ Tiles and double-click or drag the XYZ Tile service to the Layers panel.
# Configure additional WMS connections in the same manner using the URLs of this table:
{| class="wikitable sortable"
|-
! WMS Name
! URL
|-
| Google Satellite
| https://mt1.google.com/vt/lyrs=s&hl=en&x={x}&y={y}&z={z}
|-
| Google Streets
| https://mt1.google.com/vt/lyrs=m&x={x}&y={y}&z={z}
|-
| Google Terrain
| https://mt1.google.com/vt/lyrs=p&x={x}&y={y}&z={z}
|-
| OpenStreetMap Mapnick
| http://tile.openstreetmap.org/{z}/{x}/{y}.png
|-
| OSM Cycle Map
| http://tile.thunderforest.com/cycle/{z}/{x}/{y}.png
|-
| OSM Black and White
| http://tiles.wmflabs.org/bw-mapnik/{z}/{x}/{y}.png
|-
| Bing Maps
| http://ecn.t3.tiles.virtualearth.net/tiles/a{q}.jpeg?g=1
|-
| ESRI Streets
|https://server.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer/tile/{z}/{y}/{x}
|-
| Carto Positron
| https://cartodb-basemaps-a.global.ssl.fastly.net/light_all/{z}/{x}/{y}.png
|-
| Stamen Terrain
| http://a.tile.stamen.com/terrain/{z}/{x}/{y}.png
|}

==Add Digital Ortho Photos (DOP) of Lower Saxony==
Since 2022 digital otho photos in Lower Saxony are published as open geodata under the License „Datenlizenz Deutschland – Namensnennung – Version 2.0“. They can be directly downloaded or used as WMS in QGIS.
  
# Open {{button|text=Data Source Manager}}  [[Image:QGIS_3.0_datasource.png|30px]]
# Click {{button|text= WMS/WMTS}} [[File:Addwms.png|100px]].
# {{mitem|text= Layers --> New}}. Type a name for the new WMS connection e.g. {{typed|text= NDS DOP}} (Digitales Orthophoto Niedersachsen).
# Type the URL : {{typed|text=https://www.geobasisdaten.niedersachsen.de/doorman/noauth/wms_ni_dop?&request=getCapabilities&service=WMS}}
[[File:qgis_add_dtk.png|400px]]
# Click {{button|text=OK}}
# Click {{button|text=Connect}}
# Now a list of all downloadable layers appears.
# Mark one of the layers and click {{button|text=Add}}
[[File:qgis_wms_dtk.png|800px]]

==Related articles==
* [[OpenStreet Map layer]]

[[Category: Working with Online Data Sources]]