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| "version": "1.0"
| },
| "extensionsUsed": [
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| ],
| "extensionsRequired": [
| "3DTILES_implicit_tiling",
| "3DTILES_multiple_contents"
| ],
| "geometricError": 240,
| "extensions": {
| "3DTILES_metadata": {
| "schema": {
| "classes": {
| "layer": {
| "properties": {
| "color": {
| "type": "VEC3",
| "componentType": "UINT8"
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| "priority": {
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| "groups": {
| "ground": {
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| "properties": {
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| "priority": 0
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| },
| "sky": {
| "class": "layer",
| "properties": {
| "color": [206, 237, 242],
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| }
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| "root": {
| "boundingVolume": {
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|
