Hello! Thank you for the feedback. 
I can reproduce the issues, but only with *Map rendering engine* set to 
*Version 
1*. Please try to switch *Map rendering engine* to* Version 2*, in *Menu* – 
*Settings* – *OsmAnd Settings* –

On Friday, 7 July 2023 at 11:14:08 UTC+3 [email protected] wrote:

> Xavier, thanks for your feedback. 
> Agreed the "overflow" anomalies are most likely due to errors in the 
> water-boundaries on OSM.
> Correcting them is a "foreign country" to me. 
>
> The true geometry of the land is visible for all to see on OSM 
> (OpenStreetMap). 
> Please could someone competent at editing OSM make the corrections?  (They 
> could hardly make it worse!)
>
> On Thursday, 6 July 2023 at 16:01:18 UTC+1 Xavier wrote:
>
>> On Thu, Jul 06, 2023 at 12:46:59AM -0700, P Wat wrote: 
>> >On Wednesday, 5 July 2023 at 15:41:40 UTC+1 P Wat wrote: 
>> > 
>> >> Using OsmAnd+ 11.04 on Android 13. 
>> >> Bizarre rendering of features near sea level. Areas seemingly flooded 
>> >> (though obviously not actually). Problem is visible on west side of 
>> the 
>> >> river from 50.384329, -3.597140 to about a mile upriver and at another 
>> >> location about 1.6mi downriver. 
>> >> It is an issue which randomly occurs periodically at various 
>> locations. 
>> >> Can someone:- 
>> >> i) Rectify the problem here? 
>> >> ii) Explain the cause? 
>> >> iii) Explain how it is rectified? 
>> >> Thanks. 
>> >> PW 
>>
>> >Attached screenshot of part of the affected area 
>>
>> Given that few of us are familiar with that area, it is hard for us to 
>> know which water parts are "overflow". 
>>
>> With that said, issues with water boundaries "overflowing" can be an 
>> indication of broken/incorrect OpenStreetMap (OSM) data for the river 
>> edge at the spot where the overflow begins. So it is very possible 
>> that these overflow spots indicate that some fixing of the master OSM 
>> data is needed. However, properly fixing water booundaries in OSM is a 
>> non trivial exercise, so if you don't feel up to doing so you may want 
>> to contact a local OSM mapper to check the boundaries for issues and 
>> fix those that are found. 
>>
>

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