Point is about 50m off once reviewed in webmap after submitting survey

Question

I'm using Arc GIS Enterprise portal 10.9.1 with the latest version of both the connect software & the survey however when a point is plotted on the map within the survey & then reviewed the point has jumped around 50m which looks to be a projection issue but everything is in British National Grid.

The only way to get a point to stay where you want it to is to open the webmap of the survey & create a point at that level then it won't move.

When plotting the point in the survey it looks accurate, it's only after the survey has been submitted & reviewed in the webmap.

BrettStokes · Answer

Hi @AndrewReynoldsDevon,

It sounds like a problem projecting from Web Mercator (used by Survey123 basemaps) to your British National Grid webmap, although 50m seems exceedingly large. Are you using your device location (ie inbuild or external GPS) to capture the point, or are you manually digitising it on the map in Survey123 using the basemap for reference?