如何根据多边形的坐标调整react传单中的缩放级别

Question

我正在尝试创建一个带有多边形的贴图。我们如何确定缩放级别，以便所有多边形在地图上都可见。

Answer 1

您可以为此使用FeatureGroup。类似这样的东西：

var mymap = L.map('mapid').setView([51.505, -0.09], 13);
L.tileLayer('https://api.mapbox.com/styles/v1/{id}/tiles/{z}/{x}/{y}?access_token=pk.eyJ1IjoibWFwYm94IiwiYSI6ImNpejY4NXVycTA2emYycXBndHRqcmZ3N3gifQ.rJcFIG214AriISLbB6B5aw', {
maxZoom: 18,
attribution: 'Map data &copy; <a href="https://www.openstreetmap.org/">OpenStreetMap</a> contributors, ' +
'<a href="https://creativecommons.org/licenses/by-sa/2.0/">CC-BY-SA</a>, ' +
'Imagery © <a href="https://www.mapbox.com/">Mapbox</a>',
id: 'mapbox/streets-v11',
tileSize: 512,
zoomOffset: -1
}).addTo(mymap);
var poly1 = L.polygon([
[51.509, -0.08],
[51.503, -0.06],
[51.51, -0.047]
]).addTo(mymap);
var poly2 = L.polygon([
[51.519, -0.18],
[51.513, -0.16],
[51.52, -0.147]
]).addTo(mymap);
var group = L.featureGroup([poly1, poly2]);
mymap.fitBounds(group.getBounds());

<link href="https://unpkg.com/leaflet@1.7.1/dist/leaflet.css" rel="stylesheet"/>
<script src="https://unpkg.com/leaflet@1.7.1/dist/leaflet.js"></script>
<div id="mapid" style="width: 600px; height: 400px;"></div>