VJMAP
Turn DWG into a Web map
you can query and overlay

let svc = new vjmap.Service(env.serviceUrl, env.accessToken)
let res = await svc.openMap({
  mapid: "sys_cad2000",
  mapopenway: vjmap.MapOpenWay.GeomRender, // open with geometry rendering
  style: { backcolor: 0 }
})
if (res.error) message.error(res.error)

let mapExtent = vjmap.GeoBounds.fromString(res.bounds)
let prj = new vjmap.GeoProjection(mapExtent)
let map = new vjmap.Map({
  container: "map",
  style: svc.rasterStyle(),
  center: prj.toLngLat(mapExtent.center()),
  zoom: 2,
  renderWorldCopies: false
})
map.attach(svc, prj)
await map.onLoad()
map.addControl(new vjmap.NavigationControl())

// Build a Tianditu tile URL reprojected to CAD coordinates
const tileUrl = svc.webMapUrl({
  tileCrs: "wgs84",
  tileUrl: ["https://t{s}.tianditu.gov.cn/DataServer?T=vec_w&X={x}&Y={y}&L={z}&tk={t}"],
  tileSize: 256, tileMaxZoom: 18,
  tileToken: ["your Tianditu tk"],
  mapbounds: res.bounds,
  srs: "EPSG:4527"
})
map.addSource("web-tdt-source", { type: "raster", tiles: [tileUrl], tileSize: 256 })
map.addLayer({ id: "web-tdt-layer", type: "raster", source: "web-tdt-source" })
// Move it below all other layers
map.moveLayer("web-tdt-layer", map.getStyle().layers[0].id)