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   Eugene Alvin Villar (seav@en.osm.town)'s status on Sunday, 10-Dec-2023 21:07:10 JST Eugene Alvin Villar

   While doing some editing in #OpenStreetMap, I stumbled onto this dramatic transformation at Domoroy Point in Barangay Matayum, Cataingan, Masbate, #Philippines 🇵🇭. In a bid to boost tourism, the local government created the huge man-made Matayum Lagoon.

   You can see the transformation by switching to different aerial imagery layers. Mapbox at the top shows the area before the lagoon was created, the middle from Bing with the initial excavation, and the bottom from Esri with the finished lagoon.

   • Embed this notice
     phiofx (phiofx@hachyderm.io)'s status on Sunday, 10-Dec-2023 21:07:09 JST phiofx

     in reply to

     @seav is there something like the "delta" of #openstreetmap, a way to identify major real changes in the underlying topography (not corrections / additions).

     With the usage of earlier satellite imagery one could image a stacked chronological sequence that documents the changing landscape.

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     phiofx (phiofx@hachyderm.io)'s status on Sunday, 10-Dec-2023 23:07:53 JST phiofx

     in reply to

     • OpenHistoricalMap

     @seav @ohm cool, thanks didn't know abou this project!

     there are actually quite a few very interesting projects in the #osm ecosystem, not sure if there is a good overview resource.

     I remember when I got started with the #streetcomplete app they have a good collection of such projects that was an eyeopener but it is quite hidden under a profile menu.

   • Embed this notice
     Eugene Alvin Villar (seav@en.osm.town)'s status on Sunday, 10-Dec-2023 23:07:54 JST Eugene Alvin Villar

     in reply to

     • phiofx
     • OpenHistoricalMap

     @phiofx I'm not exactly sure but you might be thinking of @ohm? OpenHistoricalMap is sort of like OSM (mostly uses the same tech, tools, apps, and other software) but is intended to map the complete geographic history of the Earth whereas OSM is intended to document Earth as it actually is right now.