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Webmap in OSGB not displaying as basemap in Survey123

CherylWheeler11

Hi,

I am trying to include a basemap in my basemap gallery in Survey 123 that is in British National Grid. I have set it up in the basemap group, linked the map to the form etc, and the webmap lists amongst the basemap gallery but it does not display.

Simple question.... does Survey123 support webmaps in OSGB coordinate system? If so, any ideas why mine may not be showing up?

Many thanks for any suggestions.

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Anonymous User

Hi @CherylWheeler11,

Survey123 only support basemaps and webmaps in the default Web Mercator Auxiliary Sphere projection.

Regards,

Phil.

CherylWheeler11

Thanks Phil. Can you tell me if Field Maps/Collector are the same? Is there any field app (for the purpose of defining a polygon on a map) which can utilize webmaps in OSGB?

Again, thank you.

Anonymous User

Hi @CherylWheeler11,

Off the top of my head, sorry I am not sure if Field Maps/Collector can use OSGB, you woudl be best to reach out to those teams via GeoNet or Support.

Regards,

Phil.

CherylWheeler11

Hi @Anonymous User

Just to follow up on this....we now have our Mastermap data in Web Mercator shared with Organisation, however, unless I share it 'Publicly' I cannot see this basemap in Survey123. I can see the other layers in the webmap, but not the basemap. Any suggestions? (We are unable to share the basemap publicly BTW)

Thank you

CherylWheeler11

Hi @Anonymous User @David_Brooks

Thanks both for your comments.

Problem solved! (well partially) Having realised that the map was visible on the Survey123 website (in the record details on the right hand side), it got me thinking.

Basically, I uninstalled and reinstalled the Survey123 app on my mobile device and hey presto!😁

However, on the app, the map will not zoom in to the required scale. I have labels set up in the webmap for a specific zoom level and the basemap etc is visible within the webmap when I am zoomed in to view the labels, but in the app I cannot zoom in enough for the labels to appear.

Thanks again for your comments.

@David_Brooks Unfortunately FieldMaps does not provide some of the functionality we require from S123 (report generation, MS Flow webhooks etc) so for the time being we are sticking with S123. (I am aware I could have used Fieldmaps for the geoshape question, but for the moment we are using S123)

Anonymous User

Hi @CherylWheeler11,

Glad you got the map working, sounds as though something was cached that stopped the map loading correctly.

With regards to the zoom level issue, it sounds as if one of the layers has a min/max zoom level applied, which is then limiting the zoom level of the web map when using in Survey123, as we honour the zoom level limits set.

Can you try to press and hold for a few seconds on the basemap chooser icon in the map question (blue square), this will add a 3-dot menu to the bottom of the option panel (green square). Select this button and a pop-up will appear. Select the scale bar and zoom level options (orange rectangle). You will now see the scale and zoom displayed on the map (blue screen), and also you can use the text box at bottom of this pop-up to manually set the exact zoom level.

This will help work out exactly what zoom level is being set as the min/max in the map display. From there you will need to check the info of the basemap, and every layer added to the web map, to see if they have any min/max zoom level set, as one of them should match what you are seeing in the map. Once those min/max zoom levels are updated, the map in Survey123 should be able to zoom in and out to those limits.

Regards,

Phil.

CherylWheeler11

Thanks @Anonymous User - that is exactly the problem. It works perfectly when using Map Viewer Classic, however, when I try to do exactly the same in the New Map Viewer, the option to extend the visible range is not editable. See images below. This is the same map opened in the two map viewers. As you can see, I lose my line symbology in the Classic Map Viewer.

Vey odd!

The map with no symbology loads perfectly into S123. So your suggestion solved that thank you, but I need my line symbology, and need to be able to use New Map Viewer.

Any further comments hugely appreciated. Thank you so much for your help.

Anonymous User

Hi @CherylWheeler11,

How did you create the line symbology layer? It would appear it has a visibility range (min/max zoom level) that is different to the basemap. I would suggest to look into that further, to understand the settings on that line layer, and you may need to republish it again with a larger visibility range (min/max zoom level).

Regards,

Phil.

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