Do I need the full relation data for rendering?

[Жуков_ДА]

I have already received the map data using the Get /api/0.6/map/bbox= request…

Some ways in relation are missing from this data.

With partial data, I can’t draw the water features of these relations correctly.
Do I understand correctly that I need to upload complete data separately, for example, with a request like Get /api/0.6/relation/id/full
?

[Vinzenz_Mai]

Hi and welcome here,

maybe you don’t want to use the API at all.
Quoting from API - OpenStreetMap Wiki

OpenStreetMap has an editing API for fetching and saving raw geodata from/to the OpenStreetMap database — this is the entry page for the documentation. If you just want to embed a map into a webpage, you don’t want this API. Use a web map library instead. Alternatively, consider the Overpass API which provides read-only API access.

Terms of use

The editing API is provided in order to edit the map data, not for read-only purposes or projects. Clients may be blocked without notice if they are affecting the service level for others or causing data corruption.

If you’re developing an editing software then you can use the API of course.

Best regards

[Жуков_ДА]

Thank you.
The Overpass API looks like what I need.
I’m currently trying to use the Overpass API to get the relations data I need.
With this data, the rendering can be made correct.
Development is in C# in Unity3d.