Edit next morning: rearranged paragraphs, removed duplicated info and added some clarifications.
Not all aware that behind scenes Mapillary puts in lot of effort to correlate with previously uploaded pics, aerial imagery and OSM (OpenStreetMap), after recognising traffic signs and blurring faces etc. they add those arrows which allow OSM contributors to view virtual panoramas, time-travel to other sequences along same way.
Can think of two reasons why contributors should correctly place pics before uploading: 1/ it takes extra effort to process recognised features which are discovered on pics with incorrect geo-location info and 2/ some of that work will be abortive in case geolocation info is adjusted later on.
Obvious solution is to use Drag 'n Drop utility to correct the gravest outliers before uploading; much appreciated browser-based webuploader was discontinued June 2021, but not all’s lost: the alternatives work faster, and more accurately to boot.
There are several ways to reposition your pics before uploading: tried two which were posted in reply to my question some weeks ago, after trial-and-error gravitated towards JOSM with photoadjust and photo_geotagging plug‑ins as per:
An other option is in @drivephotograph 's reply:
Soon as you’ve installed the preferred JOSM option (josm.jnlp with OpenWebStart environment) and familiarised yourself with how JOSM functions, JOSM works more accurately and faster than the departed web…l…der - but one needs to actually read various help and explanatory pages - also those for the plug-ins, make the correct layer active / (in-)visible ; the ‘update coordinates’ instruction is a bit hidden, but read and follow the instructions and all will happen as planned.
Probably helps that here in the Flanders part of Belgium one can add the most recent aerial pretty-high resolution imagery, and a plan which shows kerbs, lampposts and traffic lights, sewer covers: makes placing and aligning photos easier than a doddle.
In use, one doesn’t need to download nodes etc. from OSM: 1/ enable the two listed plug-ins and 2/ imagery relevant to your area, then 3/ drag+drop pics you wish to geo-adjust : to move insertion point drag, to adjust direction place cursor on a spot near the middle of pic, CTRL+click to see directional arrow turn.
@chrisbeddow : Further to your forum query: I’d appreciate a Mapillary plug-in for JOSM which allows me to reposition already published pics when I spot errors - both my older ones, and other contributors’ ; there is such a plug-in, but it doesn’t seem to allow to either drag or point? The OSM wiki on it was last updated April 2021 : would it still work with API v.4, please?
Met vriendelijke groet (Dutch for ‘with friendly greeting’),