diff --git a/ruoyi-ui/src/views/cesiumMap/index.vue b/ruoyi-ui/src/views/cesiumMap/index.vue
index c5f5a32..fd6a625 100644
--- a/ruoyi-ui/src/views/cesiumMap/index.vue
+++ b/ruoyi-ui/src/views/cesiumMap/index.vue
@@ -2928,11 +2928,10 @@ export default {
         const rawMeters = Cesium.Cartesian3.distance(leftCartesian, rightCartesian)
         if (rawMeters > 0) {
           const metersPerPx = rawMeters / barPx
-          const scaleRatio = this.calculateScaleRatio(metersPerPx)
-          const pixelsPerCm = this.getPixelsPerCm()
-          const widthPx = Math.min(120, Math.max(40, Math.round(pixelsPerCm)))
-          const text = `1:${scaleRatio}${this.currentScaleUnit}`
-          return { text, widthPx, niceMeters: rawMeters }
+          const niceMeters = this.niceScaleValue(rawMeters)
+          const widthPx = Math.round((niceMeters / rawMeters) * barPx)
+          const text = this.formatScaleText(niceMeters)
+          return { text, widthPx, niceMeters }
         }
       }
       // 2D/WebMercator 备用：用整屏宽度对应的地理范围计算（四角 pick 得到视口矩形）
@@ -2942,11 +2941,11 @@ export default {
         const widthMeters = Cesium.Cartesian3.distance(leftBottom, rightBottom)
         if (widthMeters > 0) {
           const metersPerPx = widthMeters / w
-          const scaleRatio = this.calculateScaleRatio(metersPerPx)
-          const pixelsPerCm = this.getPixelsPerCm()
-          const widthPx = Math.min(120, Math.max(40, Math.round(pixelsPerCm)))
-          const text = `1:${scaleRatio}${this.currentScaleUnit}`
-          return { text, widthPx, niceMeters: widthMeters }
+          const rawMeters = metersPerPx * barPx
+          const niceMeters = this.niceScaleValue(rawMeters)
+          const widthPx = Math.round(niceMeters / metersPerPx)
+          const text = this.formatScaleText(niceMeters)
+          return { text, widthPx, niceMeters }
         }
       }
       // 最后备用：从 2D 相机视锥估算（正交宽度 -> 米）
@@ -2954,11 +2953,11 @@ export default {
         const frustumWidth = camera.frustum.right - camera.frustum.left
         if (frustumWidth > 0) {
           const metersPerPx = frustumWidth / w
-          const scaleRatio = this.calculateScaleRatio(metersPerPx)
-          const pixelsPerCm = this.getPixelsPerCm()
-          const widthPx = Math.min(120, Math.max(40, Math.round(pixelsPerCm)))
-          const text = `1:${scaleRatio}${this.currentScaleUnit}`
-          return { text, widthPx, niceMeters: frustumWidth }
+          const rawMeters = metersPerPx * barPx
+          const niceMeters = this.niceScaleValue(rawMeters)
+          const widthPx = Math.round(niceMeters / metersPerPx)
+          const text = this.formatScaleText(niceMeters)
+          return { text, widthPx, niceMeters }
         }
       }
       return null
@@ -2991,6 +2990,15 @@ export default {
       }
       return best
     },
+    /** 格式化比例尺文本 */
+    formatScaleText(meters) {
+      if (meters >= 1000) {
+        const kmValue = (meters / 1000).toFixed(0)
+        return `${kmValue}km`
+      } else {
+        return `${meters}m`
+      }
+    },
     updateScaleBar() {
       if (this.useCustomScale && this.customScaleText) {
         this.scaleBarText = `${this.customScaleText}${this.currentScaleUnit}`
diff --git a/ruoyi-ui/src/views/dialogs/ScaleDialog.vue b/ruoyi-ui/src/views/dialogs/ScaleDialog.vue
index c4d64fb..b6650ba 100644
--- a/ruoyi-ui/src/views/dialogs/ScaleDialog.vue
+++ b/ruoyi-ui/src/views/dialogs/ScaleDialog.vue
@@ -60,8 +60,8 @@ export default {
     return {
       formData: {
         scaleNumerator: 1,
-        scaleDenominator: 1000,
-        unit: 'm'
+        scaleDenominator: 20,
+        unit: 'km'
       },
       rules: {
         scaleNumerator: [
@@ -97,8 +97,8 @@ export default {
     initFormData() {
       this.formData = {
         scaleNumerator: this.scale.scaleNumerator || 1,
-        scaleDenominator: this.scale.scaleDenominator || 1000,
-        unit: this.scale.unit || 'm'
+        scaleDenominator: this.scale.scaleDenominator || 20,
+        unit: this.scale.unit || 'km'
       };
     },
     closeDialog() {