just make it 2-D. make an layer/tag for DVB-T quality Make it anywhere green with this layer, which means good quality with room antenna anywhere. then users can - if they like - map blue (roof antenna needed) and red (no recieve) all their POI s. Setting a POI for DVB-T should mean, that the layer makes a round circle coulor for 10 KM in the layer. That´s it. So we can identify the red areas by "wikipedia like user mapping" and the government needs to act in certain (red) regions.
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