OpenStreetMap
After I validate a square in HOTOSM Tasking Manager, I label what imagery I validated the square against (e.g. Bing, Esri, Maxar). I got this idea after seeing mappers comment with which imagery they mapped their buildings, roads etc.
The problem arises when the imagery is validated against a different imagery that was used to map the area. For example, I regularly validate against Bing Aerial Imagery, but sometimes users have noted that they used Maxar Premium Imagery. It would make sense for me to instead validate using the same imagery - in this case Maxar - but when loading the imagery in JOSM I get the following message:
Error downloading tiles: INVALID CONNECT ID: apiKey
There are also other problems. Bing has the highest resolution imagery, the main reason it is my preferred imagery to validate against. Esri has lower resolution, and is also inconsistent with Bing, in large part due to them having taken the pictures at different times/dates in history. Which poses another question: which imagery is the most up-to-date? I’ve assumed Bing, but that assumption is without reason.
Discussion
Ulasan AkuAnakTimur terhadap 21 Febuari 2020 pada 18:09
For the time being, Maxar imagery cannot be accessed through the JOSM editor. However, mappers would be able to do so through the development’s version (i.e. the next version of JOSM) - or through the iD editor, viewed through any browser.
Ulasan rab terhadap 21 Febuari 2020 pada 19:00
Always the latest layer! Determine it by comparing all available layers. The older layers may offer different lighting, resolution and viewing angle to make things more clear.
Ulasan GOwin terhadap 22 Febuari 2020 pada 07:21
You can manually add the layers, or update your version of JOSM.
Maxar Premium ` tms[24]:https://services.digitalglobe.com/earthservice/tmsaccess/tms/1.0.0/DigitalGlobe:ImageryTileService@EPSG:3857@jpg/{z}/{x}/{-y}.jpg?connectId=71a837e4-2609-4496-b5ea-5f0e4fdb020d`
Maxar Standard
tms:https://services.digitalglobe.com/earthservice/tmsaccess/tms/1.0.0/DigitalGlobe:ImageryTileService@EPSG:3857@jpg/{z}/{x}/{-y}.jpg?connectId=f57b8754-0d70-4439-bdb4-641beea5c2ecI tend to validate a user’s edit against the imagery they used (usually, tasking managers would indicate a preferred imagery, so one couldn’t blame contributors), then confirm other changes with the latest, when possible.