Amy Hahs, Parkville, Australia, has posted this interesting metaphor of a magnet and iron filings as personal take on the attraction value of urban parks
Parks with strong “magnetism” can potentially exert forces of attraction and repulsion for people.
The pull and push of highly valued green spaces
I am a glass half full person, but I am also a realist. In the days that followed my visit to the park, I started to think about what goes into making a park like that. If I rolled back the turf on that fabulous big hill, what would l find? Where do those beautiful boulders come from, and what will happen if we keep gathering those rocks to use in other parks? Are there enough weathered logs to feed our desire for naturalistic playgrounds? And how can we make sure that these parks are distributed equitably now, as well as into the future? These are some critical questions that I would like to explore in the remainder of this essay.
A useful analogy to help with this discussion is the relationships between magnets and metal filings. The forces of attraction and repulsion combine to reveal the shape of the magnetic fields by creating clearly defined areas with and without filings. Some magnets have quite strong fields and produce very clear patterns, whereas others are much weaker and barely make an imprint.
If we think about parks as being magnets in an urban area, the filings are a way of visualising the impact they have on the economic, environmental, and social dimensions of the urban landscape. Outstanding and engaging parks, such as the one I described, have stronger and farther-reaching magnetic fields compared to the smaller parks with fewer resources, which have only a limited effect on a smaller number of filings. However, these strongly magnetic parks also create more obviously binary landscapes, and accumulate a much larger volume of filings.