Gregory's ServerI am doing some #OpenStreetMap updates in rural Brandenburg, Germany. And I have been reading about water shortage and lowering groundwater levels for a few years. But I never imaged how well one can see the change in the aerial imagery of the last couple of years…
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@tordans das sieht ja gruselig aus. @ChristianMichaelis In diesem Fall vermute ich, dass es am Aufnahme-Zeitpunkt liegt (März 2020 vs. Mai 2022). In dieser Gegen sind mir bisher wenige großflächige Nadelbaum-Exodus aufgefallen. Aber im Harz und Co ist das natürlich katastrophal. https://podcasts.apple.com/de/podcast/mission-klima-l%C3%B6sungen-f%C3%BCr-die-krise/id1503526127?i=1000637135907 fand ich bezogen auf den Harz sehr informativ. But most trees are on the picture with the lowest water level. Sadly this pic hasn't a date - stamp like the others... On the first picture samples it's the opposite. Worst trees and worst level are on the pic without date... But @oxytocinated made two toots. One with three pics and the second toot with four pics. 3rd pic of the 1st toot is without date. @CannaParts @einhirn FYI I put the year in the image alt description and just updated the source of the latest image which is hidden in a PDF at https://data.geobasis-bb.de/geobasis/information/aktualitaeten/bb_luftbild_bildflugstand_20cm.pdf 🙈 - ahhh OK... now I got it...🤦♂️ So, to take the green as an indicator we absolutely need the month, too... otherwise lowest level with most green in the 1st pic of the 2nd toot would be a paradoxem...  @CannaParts @tordans @einhirn In Latvia, in some places the vertical water level change is measured in meters. If one would compare springtime and summertime pictures, they might think all the water is gone. For example, see the following two pictures - this is just seasonal change. @richlv @CannaParts @tordans The first picture is from march 2020, the second from may 2022 (you can see it in the photo). The loss of trees for me looks like what you find all over Germany: damages from bark beetle, which were very much increased by drought in some regions. @tordans fair play for mapping in Brandenburg! I'm trying to persuade my parents to switch to an OSM based sat nav while exploring Brandenburg and the adjoining Bundesländer, but no luck so far. @BUnicycling I got mine to use #Komoot for hike and bike tours. That is probably the better usecase / experience for OSM data anyways :). Maybe they could hook up an action cam to their car and help with (B) https://wiki.openstreetmap.org/wiki/Brandenburg/Kampagne_Radnetz ?  @tordans How close are they in terms of time of year. The vegetation changes are what are hitting me hardest. |
Here is another case from a smaller lake. The canary version of #Rapid integrates the Esri Wayback Imagery https://rapideditor.org/canary#map=18.07/52.70698/13.87967&background=EsriWorldImagery_2020-03-23&datasets=fbRoads,msBuildings&disable_features=boundaries which makes it easy to look back in time. #OpenStreetMap