Visual validation of the result (QGIS)
The visual validation of algorithm can be done by comparing result (raster/vector) against the original service (WMS/WFS) using a geographic information system, e.g. QGIS (version 3.4.1 in this case).
- url adress of the service: http://paikkatieto.ymparisto.fi/arcgis/services/INSPIRE/SYKE_Hydrografia/MapServer/WmsServer
- CRS (coordinate reference system, stored in metadata): 3067
- georeferenced output
Note: for connecting other service than WMS different option must be selected (e.g. Add WFS Layer as shown in the image)
Select the layer (one service may content several layers, all layers may be selected by clicking the heading one) and check the coordinate system (for changing the CRS follow next step)
Filter/search for the correct CRS using EPSG code and select
Before adding the new layer, the Data Source Manager window should look like this
Added service
Note: connecting vector layers works in similar way.
Browse for the raster file and Add
- appearance of layer may be adjusted (e.g. setting the transparency), right-click the layer and select Properties, choose the Transparency tab
Result
- for better geographic context OpenStreetMap can be connected using Browser Panel (switch on the Browser Panel by right-click in the Toolbar area)
