Drone stuck because previous portal not visible
This happened to me to day. I jumped from one portal to another and when the drone was at the new portal, the previous portal is missing, its not possible to see it anymore, despite all the attempts to restart and go in and out of the drone view, it was gone.
I do not have a key because the drone is far from home. I moved the drone from the green to the blue, as the connection shows in the image. Please send me a key to this location, if that's a solution. 🗝️🙏
It's not possible to go to any other site, but between the two blue, of course.
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It's not possible to "send" you a key... someone would have to go hack one for you then meet you somewhere to hand it off.
I'm looking at the map and Löfkulla Golf is just barely in range of that portal. You've basically gone through a one-way drone door and the only way I know of to get out is going to be to go hack a key to one of the very near by portals.
You cold also get someone to go look for things in the area to submit as new portals. Salama Brewing Company might be a good candidate if you want to go the other direction: https://salamabrewingco.selz.com/ To go back where you came from you could probably get the cafe at the golf club passed.
Those would be "slow motion" moves, though.
Is a bit of a bug. If you can hop to a portal, you should be able to see the prior portal. Had this happen to me as well.
There are situations where you cannot go back with the drone if you jumped more than 500 m. For a full explanation, see this discussion:
https://community.ingress.com/en/discussion/11100/a-way-to-push-the-drone-move-distance-to-up-to-1-km/
Could you recall the drone?
Yes, of course, but I want to find out if there is any other solution before.
I like the solution @Hosette gave, submit a new portal in the area.
I found that discussion, but I find it very strange that there is a restricted distens but suddenly you can override it without knowing it. I mean there is no way of knowing how long you jump.
You are guaranteed to be able to jump to any portal up to 500m away. Any extra portals are a bonus due to the use of S2 cells.
There are at least 2 plug-ins for IITC that show where a drone can jump to, and both highlight portals where the return jump cannot be made.
It is the way the drone view was programmed, and is exactly the same as the way portals are shown on the main scanner screen. (One person I know of has disputed this, but as far as I am aware never came back with any examples of where this is incorrect).
S2 cells have become popular as they are a faster way to define objects within an approximate area when exact distances are not considered critical. While it creates the inconsistencies you have encountered, the process is well enough understood and discussed in these forums, I for one would not welcome more lag in the server/scanner to change this process.
I recenctly encountered a case where the IITC plugin (dronePathTravelPlanner) showed a portal as reachable, but it was not and I had to recall the drone. My working hypothesis is that this happens when the corner of the S2 cell is exactly 500 meters away. To be confirmed by the community.
dronePathTravelPlanner does not use a correct (defined as matching that used by Niantic) calculation for the circle. There are many ways of approximating distance between points around the globe, and for most practical purposes they give close enough to the correct value (here I mean the distance if measured precisely by survey equipment). But as you have observed, when the edge/corner of an S2 cell is close to 500m from the centre of the circle, the small differences due to distance calculation method matter for our purposes.
https://github.com/azrael-42/IITC-Drone-Helper uses a different calculation to determine distance - and I am unaware of any situations where this does not give a correct (matching Niantic) result. I've tried looking really hard!
There was some discussion of this issue on Reddit a year or so ago (look for comments by Azrael-42): https://www.reddit.com/r/Ingress/comments/kyjwvl/since_its_drone_flight_weekend_this_is_the/
For comparison - this is Drone Helper's display of the portals you were looking at - it shows the portal in question as out of range: