WorldScaleSceneView - Rendered Graphics smaller than real world property boundary in WorldScaleView

nvsraju0979 — Tue, 09 Jun 2026 13:58:18 GMT

I am building an iOS app using ArcGIS Runtime SDK (UIKit) that shows property parcel boundaries in AR using WorldScaleSceneView.

Problem: When basemap is visible, the graphic EXACTLY covers the property boundary on the basemap. But when I reduce the basemap opacity to 0, the graphic appears SMALLER than the actual real world property.

Property Details example sample data:

Real world size: ~3 acres (~123m x 123m)
Coordinate system: WGS84 (WKID 4326)
Coordinates are correct (verified on basemap)

Sample Coordinates:

My Current Setup:

// Scene setup
let scene = AGSScene(basemapStyle: .arcGISImageryStandard)
scene.addElevationSource()
scene.baseSurface?.opacity = 0
arView.locationDataSource = AGSCLLocationDataSource()
arView.translationFactor = 1

// Graphics overlay setup
boundariesGraphicsOverlay.sceneProperties =
AGSLayerSceneProperties(surfacePlacement: .drapedFlat)

// Symbol
AGSSimpleLineSymbol(
style: .solid,
color: UIColor(red: 1.0, green: 1.0, blue: 0.0, alpha: 1.0),
width: 5
)

What I Have Already Tried:

Verified coordinates are in WGS84
Added elevation source
Set translationFactor = 1
Set surfacePlacement = .drapedFlat
Verified graphic fits basemap exactly

Questions:

Why does the graphic appear smaller in real world compared to basemap?
Is there any additional configuration needed for WorldScaleSceneView to render graphics at true 1:1 real world scale?

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WorldScaleSceneView - Rendered Graphics smaller than real world property boundary in WorldScaleView