MerginMaps / MerginMaps/mobile

WFS layer does not render/repaint every time when zooming

Open
#2,672 0 comments 0 reactions 0 assignees View on GitHub

Nobody has claimed this yet.

bug map
Dominant language
C++
Stars
388
Forks
87
Avg merge
2d 7h
Merged PRs (30d)
20

Description

I have four layers hosted at the same server. The server is out of my control and I honestly don't know anything about what software it is running. But I know that I have not had any similar issues on QGIS Desktop App when accessing these WFS layers.

I have only tried Mergin Maps Input with GPKG and WFS-T. GPKG works flawlessly and everything is rendered every time. But with WFS-T its less than 50% of the time that it renders. It tends to be when I zoom in that the symbols for the WFS-T layer disappear.

I have tried to demonstrate the behavior in the screen capture below.

https://user-images.githubusercontent.com/4488298/231526658-73358be9-71b4-4634-9b73-6b5ae8629881.mp4

Input App: 2.1.1 - android
System: Android (12.0)

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

No source file, test, or entry point is identified. Start by reproducing the WFS-T rendering failure on Android 12 while zooming, using the linked screen capture and comparing behavior with QGIS Desktop. Done means the WFS-T layer reliably renders its symbols after repeated zoom changes.

Written by the indexing model from the issue text.

Assessment

Tech stack
android
Domain
mobile
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.