fix

ruoyi-ui/src/components/map/index.vue

@@ -800,6 +800,7 @@ export default {
                 layer: "CJ:G_CJ",
                 matrixSet: "EPSG:4326",
                 format: "image/png",
+                 "TRANSPARENT": 'true',
                 projection: proj3857,
                 tileGrid: tileGrid,
                 style: ""