> For the complete documentation index, see [llms.txt](https://docs.mapbox.com/mapbox-gl-js/llms.txt)
# Filter symbols based on pitch and distance
Use [`pitch`](https://docs.mapbox.com/style-spec/reference/expressions/#pitch) and [`distance-from-center`](https://docs.mapbox.com/style-spec/reference/expressions/#distance-from-center) expressions in the `filter` field of a `symbol` layer to remove large size POI labels in the far distance at high pitch, freeing up that screen real-estate for smaller road and street labels.
> Example code:
**JavaScript**
```html
Filter symbols based on pitch and distance
```
**React**
```jsx
import React, { useEffect, useRef } from 'react';
import * as mapboxgl from 'mapbox-gl/esm';
import mapboxglCompare from 'mapbox-gl-compare';
import 'mapbox-gl/dist/mapbox-gl.css';
import 'mapbox-gl-compare/dist/mapbox-gl-compare.css';
const mapStyle = { position: 'absolute', top: 0, bottom: 0, width: '100%' };
const MapboxExample = () => {
const mapRef = useRef();
const beforeMapContainerRef = useRef();
const afterMapContainerRef = useRef();
const comparisonContainerRef = useRef();
useEffect(() => {
// some development servers will run this hook more than once
// return if the map has already been initialized
if (mapRef.current) return;
const beforeMap = new mapboxgl.Map({
// TO MAKE THE MAP APPEAR YOU MUST
// ADD YOUR ACCESS TOKEN FROM
// https://account.mapbox.com
accessToken: 'YOUR_MAPBOX_ACCESS_TOKEN',
container: beforeMapContainerRef.current,
style: 'mapbox://styles/mapbox/streets-v12',
center: [-77.01866, 38.888],
pitch: 75,
zoom: 15
});
const afterMap = new mapboxgl.Map({
accessToken: 'YOUR_MAPBOX_ACCESS_TOKEN',
container: afterMapContainerRef.current,
style: 'mapbox://styles/mapbox/streets-v12',
center: [-77.01866, 38.888],
pitch: 75,
zoom: 15
});
afterMap.once('load', () => {
const poiLayers = ['poi-label', 'transit-label'];
for (const layerId of poiLayers) {
const currFilter = afterMap.getFilter(layerId);
const updatedFilter = [
'all',
currFilter,
[
'case',
['<=', ['pitch'], 60],
true,
['all', ['<=', ['distance-from-center'], 2], ['>', ['pitch'], 60]],
true,
false
]
];
afterMap.setFilter(layerId, updatedFilter);
}
});
mapRef.current = new mapboxglCompare(
beforeMap,
afterMap,
comparisonContainerRef.current
);
}, []);
return (