OL5矢量层:瓷砖的Y坐标

我尝试在全局平铺网格中使用OL5矢量平铺。

import 'ol/ol.css'
import { Map, View } from 'ol'
import MVT from 'ol/format/MVT'
import TileGrid from 'ol/tilegrid/TileGrid'
import VectorTileLayer from 'ol/layer/VectorTile'
import VectorTileSource from 'ol/source/VectorTile'

let zoom = 0
let center = [8531000, 5342500]
let resolutions = [
    9.554628535647032,
    4.777314267823516,
    2.388657133911758,
    1.19432856695588,
]
let extent = [0, 0, 20037508.342789244, 20037508.342789244]

const map = new Map({
    target: 'map',
    view: new View({
        zoom: zoom,    
        center: center,
        resolutions: resolutions,
   })     
})

const vectorTiles = new VectorTileLayer({
    source: new VectorTileSource({
        tileSize: 256,
        projection: 'EPSG:3857',
        format: new MVT(),    
        tileGrid: new TileGrid({      
            extent: extent,          
            resolutions: resolutions,
        }),    
        url: 'http://localhost:8000/get-vector-tiles/{z}/{x}/{y}'
    })   
 })

 map.addLayer(vectorTiles)

请求看起来像 http://localhost:8000/get-vector-tiles/0/3487/6007 , 据我所知 {x}/{y} 是从原点(在我的例子中)得到的瓷砖坐标(数字) 0,0 )。

开始分辨率为 9.554628535647032 , 因此,瓷砖尺寸为 9.554628535647032 × 256 = 2445.984905126 米

估算所需区域坐标:

X: 2445.984905126 × 3487 = 8529149.3642

Y: 2445.984905126 × 6007 = 14693031.2943

考虑到地图的中心是 [8531000, 5342500] :

X坐标正确 8529149.3642 ~ 8531000 , 当Y坐标不匹配时 5342500 vs 14693031.2943

发生了什么?