Quality asssesment and control reports present results of quality tests performed by the EEA and the ETC-BD on top of the national CDDA data. The ETC-BD assesment is more focused on geographical data and on their relation with tabular data.
If getting there by car, instead of by train or bus, be generous and share the space. By taking other people who might have made their journey in a separate car, you're putting one less car on the road.
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