在OpenLayers中，有没有办法在翻译层中渲染Mapbox矢量切片？

Question

The recommended approach for translating a vector tile layer seems to be to translate the canvas context on precompose (see OpenLayers 3: per-layer translation for tiled image layers ). As noted, only those tiles that fall within the map's pre-translation visible extent are rendered.

How can I achieve the effect of translation without losing those boundary tiles?

I also tried using a custom tile grid with an origin ( https://github.com/openlayers/openlayers/issues/9514 ) but this appears to be a misuse of the 'origin' parameter so tiles were only partially drawn. I am guessing that custom origins are required to fall on a tile boundary; mine do not.

Update: Mike's solution is correct. As I recall, I had tried Mike's approach before submitting this question and, although the layer was translated, there was a problem with portions of tiles disappearing (or being drawn in the wrong location). But experimenting with Mike's example, I noticed that setting useInterimTilesOnError to false in my application fixed both the disappearing and misdrawn tile issue. Perhaps there is some problem with the tiles I am using, but it is interesting that when the layer is not offset, tiles are rendered properly regardless of how useInterimTilesOnError is set.

Answer 1

It seems to be sufficient to offset the extent of the tilegrid (the origin will default to the top left of the extent).

 var proj3857 = ol.proj.get('EPSG:3857'); var raster = new ol.layer.Tile({ source: new ol.source.XYZ({ url: 'https://services.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer/tile/{z}/{y}/{x}', maxZoom: 23 }) }); var map = new ol.Map({ layers: [raster], target: document.getElementById('map'), view: new ol.View({ center: ol.proj.fromLonLat([0, 50]), maxZoom: 23, zoom: 5, projection: proj3857 }) }); var dx = -200000; var dy = -100000; var extent = proj3857.getExtent(); offsetExtent = [extent[0] + dx, extent[1] + dy, extent[2] + dx, extent[3] + dy]; var layer = new ol.layer.VectorTile({ source: new ol.source.VectorTile({ format: new ol.format.MVT(), url: 'https://basemaps.arcgis.com/v1/arcgis/rest/services/World_Basemap/VectorTileServer/tile/{z}/{y}/{x}.pbf', tileGrid: ol.tilegrid.createXYZ({ extent: offsetExtent, maxZoom: 18 }) }), //useInterimTilesOnError: false, style: new ol.style.Style({ stroke: new ol.style.Stroke({ width: 1, color: 'white' }) }) }); map.addLayer(layer); 

 <script src="https://cdn.rawgit.com/openlayers/openlayers.github.io/master/en/v5.3.0/build/ol.js"></script> <link href="https://cdn.rawgit.com/openlayers/openlayers.github.io/master/en/v5.3.0/css/ol.css" rel="stylesheet"/> <div id="map" class="map"></div> 

Console log from the OpenLayers example near Japan