The GridDisplay.xml produced by the display generator spreadsheet does lack the default section, which includes the geo map section as well as the plot group id for each model.
These have to be added as described below
Step 1: Open the GridDisplay.xml file, you will see the a text like the following at the beginning of the file:
defaults geo-Map settings for Thames data
<defaults>
TO DO make sure that there is a plot group Id for each model of Thames region that is present in this (merged) configuration_
<plotGroupId>KV</plotGroupId>
TO DO please add the most recent geoMap section here (take the original one from the GridDisplay file the merge is based on and add all additional information for the model you add to the existent configuration)
<geoMap>
- replace with most recent geo map section -
</geoMap>
</defaults>
Step 2: In the section plotGroup add the a plot group id for all model,e.g.
<defaults>
<plotGroupId>Model_1</plotGroupId>
<plotGroupId>Model_2</plotGroupId>
<geoMap>
Step 3: In the section geo map add the merged geo map sections of the model you have merged
Step 4: save the file and validate it