[Bug]: Strange Artifacts when rendering a RasterLayer and zooming in
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- Kotlin
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Description
Mapbox Implementation
Mapbox
Mapbox Version
10.19.1
React Native Version
0.74.5
Platform
iOS
@rnmapbox/maps version
10.1.33
Standalone component to reproduce
import React from 'react';
import {
MapView,
ShapeSource,
LineLayer,
Camera,
RasterSource,
RasterLayer
} from '@rnmapbox/maps';
const aLine = {
type: 'LineString',
coordinates: [
[-74.00597, 40.71427],
[-74.00697, 40.71527],
],
};
const TILESERVER = '<OUR_TILESERVER>';
class BugReportExample extends React.Component {
render() {
const layers = [{name: 'consume_with_pedestrian_zones'}];
return (
<MapView style={{flex: 1}}>
<Camera centerCoordinate={[-74.00597, 40.71427]} zoomLevel={14} />
{layers.map(({ name }) => (
<RasterSource
key={name}
id={name}
tileSize={256}
tileUrlTemplates={[
`${TILESERVER}/${name}/{z}/{x}/{y}.png"`
]}
>
<RasterLayer
id={name}
sourceID={name}
style={{
visibility: 'visible',
rasterOpacity: 14
}}
/>
</RasterSource>
))}
</MapView>
);
}
}
Observed behavior and steps to reproduce
The map gets displayed correctly and the layers render. On higher zoom levels everything looks fine, but there is a threshold when strange artifacts, semi transparent black rectangles, start to appear (s. screenshots attached). When I zoom in more and more it gets worse and worse. Its also not the same behavior for all RasterLayers, I have some layers only representing schools, which are green polygons, that do not have this problem. Only the layers with those larger, red circles are affected. The bigger the circles, the bigger the artifacts.
We use the same layers in our web application using leaflet.js, which renders just fine, so I guess it is an Mapbox issue.
Expected behavior
Those semi transparent, black rectangles should not be there.
Notes / preliminary analysis
No response
Additional links and references
No response
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with the provided iOS reproduction using RasterSource and RasterLayer at the stated versions, then trace the mobile raster rendering path. Compare affected layers with the unaffected school polygons and verify the result by reproducing the zoom threshold; done means the semi-transparent black rectangles no longer appear as zoom increases.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- javascript, react-native
- Domain
- mobile
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100