The same person also did geojson.io, which is a wonderful tool I use occasionally. Great for testing geojson. It's a pity placemark did not make it as a company but fantastic it's now open sourced.
The people at geomob did an interview with Tom MacWright two years ago or so on their podcast: https://thegeomob.com/podcast/episode-118 when he just launched placemark.
I can’t believe I’m saying this but: I wish they had placed an ad for placemark on geojson.io.
I had no idea this existed until just now but I’ve worked at two companies where a lot of coworkers could have benefited greatly from a map app that has a few more features than geojson.io but is less complex than qgis/arcgis.
geojson.io is owned & managed by our former employer, Mapbox, where Tom built it originally some years ago, whereas Placemark was an independent project by Tom.
I wish I had a use for this, GIS tools usually don't have such a level of polish and intuitiveness. I could maybe see building a capable data viewer on Placemark as a base, but I would be ignoring half its features at that point.
Since this was a commercial product for some time, I'd love to hear some user anecdotes: What did they use it for? Did Placemark replace some existing tool, or was it used for new kinds of tasks?
you mistake "lockin" for competition. GIS will always be niche. There is no reason not to use standards for GIS, and open source has a place in the long term.
maybe people are trying to build a better alternative to arcgis? and to do this, maybe you start with a simple app first? and perhaps these people are also experts in gis? crazy to think about
oh I agree, I run QGIS and Postgresql with PostGIS. I switched my entire work flow out of ArcGIS in 2016 because ArcGIS Pro was heading to LaLa land with it's online subscription garbage.
But, my point is: If you're goin gto compete with ArcGIS, it's going to come from the spokes to the hub, and not from the hub to the spokes. That is, you need a killer app for a very specific work flow and go from there into a ecosystem.
Without a "killer app", trying to build a separate hub and market that as-is just won't sell.
The people at geomob did an interview with Tom MacWright two years ago or so on their podcast: https://thegeomob.com/podcast/episode-118 when he just launched placemark.