European Data Portal Version 4.3 – User Manual   Page 39 of 57 
 
 
Once within the map viewer application, the user can decide which layers to be displayed. Most Web 
Map Service (WMS) instances provide more than one layer. The geo -spatial visualization provides a 
dialog for choosing the desired layers for display (see Figure 4).  
 
 
Figure 4 – Selection of layers. 
In order to examine the resource in more detail, the user can click on a ge ographic feature while the 
“Feature Info” tool is enabled (see Figure 5). This function is only enab led if the service supports this 
kind of detailed query.