I guess a significant part of HN readers are in the US; my sense is that most US residents are currently avoiding any trip to Europe for the next few months, due to the Coronavirus epidemic/issue.
I guess you won't get much interest for your event, in terms of attending in person.
The message was addressed to "Barcelona readers", i.e. readers in Barcelona. But even if it hadn't been, do you think your comment would really contributed something helpful?
You are probably right; I originally thought that the message was to invite people from abroad to visit Barcelona, hence my skepticism about people wanting to travel there.
There is an app called Urban Trees (https://urbantrees.app/) based on open data of several cities. With the app you get an AR view of the trees around you, with their labels etc.
They currently have data from Barcelona, Bristol, Clark County, Edmonton, Frankfurt, Las Vegas, London, Melbourne, New York, Paris, Portland, Rostock, San Francisco, Santa Monica, Seattle, Vancouver, Washington DC, Vienna and Zurich.
I visited Granada, Spain recently and learned from a guide how a particular type of tree is planted along Gran Via specifically to absorb radiation and pollution off the streets. I cannot recall the name for the type of tree.
I sure hope Urban Trees can expand to include more and more cities so that we can learn more about the plants in cities across the world and some of the interesting perspective on urban planning!
50 years from now, will cities provide "APIs" for residents to query & access city data and services? will i be able to "REST" some "JSON" telling me when the tree around the corner that my dog likes best was last watered? i would love this.
note: "quotes" used because who knows what interfaces will be the saveurs du jour, then.
The average city is swimming in data these days. Many expose it through various APIs. The Socrata platform (disclaimer: I work there) is one example of many.
My father owned a tree service in the town I grew up in. We spent countless hours driving around town, looking at different trees and giving estimates for trimming and removal. I could imagine leveraging this data as almost a Zillow for trees.
That was my first thought as well. Their main park, where the zoo is, has only the trees along the walk way defined. Maybe I didn't understand where this thing was supposed to be going.
When I was in my early 20s (late '90s) I was lucky enough to spend a month in Barcelona with my future wife. It remains one of my all-time favorite cities in the world. I'll never forget walking its tree-lined streets to the sea.
Barcelona's map will continue to shift over the coming years too, with its move towards 'superblocks'. Even within the space of a year since my previous visit, the block I used to live on was converted.
Likely we will see more trees and plants around those areas now the roads have been converted to open spaces.
If you're into BCN geo stuff please come along to GeomobBCN - our next event is on 6th of May, details here:
https://thegeomob.com/post/may-6th-2020-geomobbcn-details
Here's a twitter thread summary of our last event in January, lots of cool maps of Barcelona: https://twitter.com/geomob/status/1217706889280217089