Neighbourhood Solar in Vathorst in Data

At the edge of our neighbourhood, on a section of grassland, there are plans to create a solar farm. This is a temporary set-up as the land will eventually be used to build houses. Those living in the houses overlooking those fields started a petition as they fear it diminishes their view. There’s a whiff of nimby here, but it’s also justified resistance as it flies in the face of an earlier two year long participatory project by the city to determine with those who live here how to use those fields.

The petition I think didn’t gather a lot of signatures (just over 1100 now). I somewhat tongue in cheek asked the initiators online if there was also a petition I could sign in favour of the solar fields. The Netherlands after all is running far behind its own goals concerning renewables so I feel action on a wider scale is needed.

This led to forming a small group of people looking into what can be done towards more solar using existing roofs in our neighbourhood. A constructive outcome I think, even if I have little real time to contribute. In conversation with the group I offered to look into what data might be helpful, to both determine the actual potential of solar energy in our location (how much irradience hits the surface here, and what yield does that make possible), and the latent potential (based on the current energy usage at household level in our part of town.

Data on irradience is available. As is household electricity usage on postcode level, which means more or less to block level. What I haven’t really looked at if there is open data concerning roof space. The base register for buildings and addresses contains the shapes of buildings for every building in the Netherlands, but that is only in 2D, so it doesn’t provide the shape of non-flat roofs. Getting the roof shapes would require combining the BAG with AHN, the lidar scan of the Netherlands that contains all heights (trees, buildings and whatnot). The AHN however is created as snapshots. Our area is actively being developed, and houses are continuously being added. The latest AHN scan of our area was in 2010, so is heavily outdated. Luckily the new AHN3 (the 3rd AHN) scans for this region are scheduled for this year, and will be made available as open data. So at least we’ll have recent data to work with.

I intend to play around with this data to see if something can be said about potential and latent demand for solar energy in our area.

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