diff --git a/Include/nmNum/nmData/nmDataAnalyzeManager.h b/Include/nmNum/nmData/nmDataAnalyzeManager.h
index 1bf892a..603049a 100644
--- a/Include/nmNum/nmData/nmDataAnalyzeManager.h
+++ b/Include/nmNum/nmData/nmDataAnalyzeManager.h
@@ -18,6 +18,7 @@
 #include <QMap>
 #include <QVector>
 #include <QPointF>
+#include <QRectF>
 #include <QPair>
 #include <QString>
 #include <QStringList>
@@ -348,6 +349,10 @@ public:
         // 初始化边界数据
         nmDataOutline* createOutline();
         nmDataOutline* getOutlineData();
+        /** @brief 按当前数值井包围盒及四周 1500m 留量创建一次性默认矩形边界。 */
+        bool createDefaultOutlineFromWells();
+        /** @brief 计算当前数值分析全部有效井位置的包围盒。 */
+        bool calculateNumericalWellBounds(QRectF& oBounds) const;
         // 移除边界数据
         bool removeOutlineData();
         // 返回边界副本数据
diff --git a/Include/nmNum/nmData/nmDataAxis.h b/Include/nmNum/nmData/nmDataAxis.h
index 34d270a..a22d435 100644
--- a/Include/nmNum/nmData/nmDataAxis.h
+++ b/Include/nmNum/nmData/nmDataAxis.h
@@ -17,6 +17,11 @@ public:
   // 实现 nmDataBase 的抽象方法：从 RapidJSON Value 反序列化数据到当前 C++ 对象
   virtual void FromJsonValue(const rapidjson::Value& jsonValue) override;
 
+  /** @brief 返回 Map 是否已经完成首次等比例坐标轴初始化。 */
+  bool isInitialViewFitted() const;
+  /** @brief 记录 Map 的首次等比例坐标轴初始化是否完成。 */
+  void setInitialViewFitted(bool bInitialViewFitted);
+
   void setXMax(const nmDataAttribute& attr);
   nmDataAttribute& getXMax();
   void setXMin(const nmDataAttribute& attr);
@@ -37,6 +42,7 @@ public:
 
 
 private:
+  bool m_bInitialViewFitted; ///< 完成后不再因数据或窗口变化自动修改坐标轴。
   nmDataAttribute m_xMax;
   nmDataAttribute m_xMin;
   nmDataAttribute m_yMax;
diff --git a/Include/nmNum/nmPlot/nmGuiPlot.h b/Include/nmNum/nmPlot/nmGuiPlot.h
index 9bb7cce..bd0fec8 100644
--- a/Include/nmNum/nmPlot/nmGuiPlot.h
+++ b/Include/nmNum/nmPlot/nmGuiPlot.h
@@ -4,6 +4,7 @@
 #include "nmDefines.h"
 #include "nmPlot_global.h"
 #include <QPointF>
+#include <QRectF>
 
 class nmObjBase;
 class nmObjPointWell;
@@ -14,6 +15,7 @@ class nmDataAnalyzeManager;
 class nmDataWellBase;
 class nmPlotGraphicBinder;
 class QWidget;
+class QResizeEvent;
 
 // 数值试井绘图载体的样例
 class NM_PLOT_EXPORT nmGuiPlot : public iGuiPlot {
@@ -97,6 +99,8 @@ class NM_PLOT_EXPORT nmGuiPlot : public iGuiPlot {
     #endif
 
   public slots:
+	/** @brief Map 首次显示稳定后，按内容和绘图区比例初始化一次坐标轴。 */
+	void initializeAxisView();
 
     // Obj选择状态改变
     void slotObjSelChanged(bool);
@@ -219,9 +223,27 @@ class NM_PLOT_EXPORT nmGuiPlot : public iGuiPlot {
 
 	// 绘制Painter函数重载
     virtual void paintEvent(QPaintEvent*) override;
+	/** @brief 首次视图尚未完成时，等待有效绘图区后再次尝试初始化。 */
+	virtual void resizeEvent(QResizeEvent* pEvent) override;
+
+  private:
+	/** @brief 计算边界及当前可见数值对象的数据坐标包围盒。 */
+	bool calculateVisibleContentBounds(QRectF& oBounds) const;
+	/** @brief 以程序方式同时应用两个坐标轴范围，并写回当前 Manager。 */
+	void applyAxisRange(double dXMin, double dXMax,
+	                    double dYMin, double dYMax);
+	/** @brief 按当前内容完成一次等比例视图计算，成功时返回 true。 */
+	bool fitInitialAxisToContent();
+	/** @brief 将首次视图初始化延迟到本轮布局完成后执行。 */
+	void scheduleInitialAxisView();
+	/** @brief 返回当前 Map 绑定的数据管理器，避免多窗口时误用全局当前对象。 */
+	nmDataAnalyzeManager* dataManager() const;
 
 	int m_iRegionMarkCount; //记录创建了多少个标记区域对象
 
 	nmPlotGraphicBinder* m_pGraphicBinder; // 图元-数据绑定协调器
+	nmDataAnalyzeManager* m_pDataManager; // 当前 Map 借用的数据管理器，不负责销毁
+	bool m_bApplyingAxisRange; // 正在由程序设置坐标轴，防止提前完成首次初始化
+	bool m_bAxisInitializationPending; // 是否已排队一次首次坐标轴初始化
 
 };
diff --git a/Src/nmNum/nmData/nmDataAnalyzeManager.cpp b/Src/nmNum/nmData/nmDataAnalyzeManager.cpp
index 079a464..d7b6af6 100644
--- a/Src/nmNum/nmData/nmDataAnalyzeManager.cpp
+++ b/Src/nmNum/nmData/nmDataAnalyzeManager.cpp
@@ -136,6 +136,9 @@ static bool isSupportedNumericalWell(const nmDataWellBase* pWellData)
            eWellType == NM_WELL_MODEL::Horizontal_Fractured_Well;
 }
 
+// 默认边界只在创建数值分析时计算一次，后续完全由用户编辑。
+static const double DEFAULT_OUTLINE_MARGIN_METERS = 1500.0;
+
 // 将工程井井别转换为数值模块的稳定枚举。枚举值同时就是流量大字段索引。
 static NM_WELL_CATEGORY frameworkWellCategory(const ZxDataWell* pWellData)
 {
@@ -2679,6 +2682,81 @@ nmDataOutline *nmDataAnalyzeManager::createOutline()
     return m_outlineData;
 }
 
+bool nmDataAnalyzeManager::calculateNumericalWellBounds(QRectF& oBounds) const
+{
+    bool bHasWell = false;
+    double dMinX = 0.0;
+    double dMaxX = 0.0;
+    double dMinY = 0.0;
+    double dMaxY = 0.0;
+
+    foreach(nmDataWellBase* pWellData, m_vWellData) {
+        if(pWellData == nullptr) {
+            continue;
+        }
+
+        const double dX = pWellData->getX().getValue().toDouble();
+        const double dY = pWellData->getY().getValue().toDouble();
+        if(!qIsFinite(dX) || !qIsFinite(dY)) {
+            continue;
+        }
+
+        if(!bHasWell) {
+            dMinX = dMaxX = dX;
+            dMinY = dMaxY = dY;
+            bHasWell = true;
+        } else {
+            dMinX = qMin(dMinX, dX);
+            dMaxX = qMax(dMaxX, dX);
+            dMinY = qMin(dMinY, dY);
+            dMaxY = qMax(dMaxY, dY);
+        }
+    }
+
+    if(!bHasWell) {
+        oBounds = QRectF();
+        return false;
+    }
+
+    oBounds = QRectF(QPointF(dMinX, dMinY),
+                     QPointF(dMaxX, dMaxY)).normalized();
+    return true;
+}
+
+bool nmDataAnalyzeManager::createDefaultOutlineFromWells()
+{
+    if(m_outlineData != nullptr) {
+        return false;
+    }
+
+    QRectF oWellBounds;
+    if(!calculateNumericalWellBounds(oWellBounds)) {
+        return false;
+    }
+
+    nmDataOutline* pOutlineData = createOutline();
+    if(pOutlineData == nullptr) {
+        return false;
+    }
+
+    const double dLeft = oWellBounds.left() - DEFAULT_OUTLINE_MARGIN_METERS;
+    const double dRight = oWellBounds.right() + DEFAULT_OUTLINE_MARGIN_METERS;
+    const double dTop = oWellBounds.bottom() + DEFAULT_OUTLINE_MARGIN_METERS;
+    const double dBottom = oWellBounds.top() - DEFAULT_OUTLINE_MARGIN_METERS;
+    QVector<QPointF> vecPoints;
+    vecPoints << QPointF(dLeft, dTop)
+              << QPointF(dRight, dTop)
+              << QPointF(dRight, dBottom)
+              << QPointF(dLeft, dBottom);
+
+    pOutlineData->setName("");
+    pOutlineData->setOutlineType(NM_Rect_Outline_Type);
+    pOutlineData->setOutlinePoints(vecPoints);
+    pOutlineData->setFlowTypeList(QVector<int>(vecPoints.size(), 0));
+    notifyGeometryListChanged();
+    return true;
+}
+
 nmDataOutline* nmDataAnalyzeManager::getOutlineData()
 {
     return m_outlineData;
diff --git a/Src/nmNum/nmData/nmDataAxis.cpp b/Src/nmNum/nmData/nmDataAxis.cpp
index 2f30a5a..a073e40 100644
--- a/Src/nmNum/nmData/nmDataAxis.cpp
+++ b/Src/nmNum/nmData/nmDataAxis.cpp
@@ -1,6 +1,7 @@
 #include "nmDataAxis.h"
 
 nmDataAxis::nmDataAxis()
+  : m_bInitialViewFitted(false)
 {
   m_xMax = nmDataAttribute("AxisXmax", 2800.0, "m", UNIT_TYPE_LENGTH, QStringList(), QStringList() << "ft" << "m" << "cm" << "mm" << "in" << "0.1 in" << "mile" << "km");
   m_xMin = nmDataAttribute("AxisXmin", -1100.0, "m", UNIT_TYPE_LENGTH, QStringList(), QStringList() << "ft" << "m" << "cm" << "mm" << "in" << "0.1 in" << "mile" << "km");
@@ -28,6 +29,7 @@ rapidjson::Value nmDataAxis::ToJsonValue(rapidjson::Document::AllocatorType& all
   axisObject.AddMember("AxisXmin", m_xMin.ToJsonValue(allocator), allocator);
   axisObject.AddMember("AxisYmax", m_yMax.ToJsonValue(allocator), allocator);
   axisObject.AddMember("AxisYmin", m_yMin.ToJsonValue(allocator), allocator);
+  axisObject.AddMember("InitialViewFitted", m_bInitialViewFitted, allocator);
 
   //axisObject.AddMember("MainScaleX", m_xMainScale.ToJsonValue(allocator), allocator);
   //axisObject.AddMember("SubScaleX", m_xSubScale.ToJsonValue(allocator), allocator);
@@ -40,6 +42,13 @@ rapidjson::Value nmDataAxis::ToJsonValue(rapidjson::Document::AllocatorType& all
 // 从 RapidJSON Value 反序列化数据到 nmDataAxis
 void nmDataAxis::FromJsonValue(const rapidjson::Value& jsonValue)
 {
+  // 缺少该字段的已有成果已经保存了轴范围，加载时不得擅自覆盖。
+  m_bInitialViewFitted = true;
+  if (jsonValue.HasMember("InitialViewFitted") &&
+      jsonValue["InitialViewFitted"].IsBool()) {
+    m_bInitialViewFitted = jsonValue["InitialViewFitted"].GetBool();
+  }
+
   // 反序列化 nmDataAttribute 类型的成员
   // 调用 nmDataAttribute 自身的 FromJsonValue 方法进行递归反序列化
   if (jsonValue.HasMember("AxisXmax") && jsonValue["AxisXmax"].IsObject()) {
@@ -69,6 +78,16 @@ void nmDataAxis::FromJsonValue(const rapidjson::Value& jsonValue)
   //}
 }
 
+bool nmDataAxis::isInitialViewFitted() const
+{
+  return m_bInitialViewFitted;
+}
+
+void nmDataAxis::setInitialViewFitted(bool bInitialViewFitted)
+{
+  m_bInitialViewFitted = bInitialViewFitted;
+}
+
 nmDataAttribute& nmDataAxis::getXMax()
 {
   return m_xMax;
diff --git a/Src/nmNum/nmPlot/nmGuiPlot.cpp b/Src/nmNum/nmPlot/nmGuiPlot.cpp
index 77df26c..37b6d99 100644
--- a/Src/nmNum/nmPlot/nmGuiPlot.cpp
+++ b/Src/nmNum/nmPlot/nmGuiPlot.cpp
@@ -64,10 +64,57 @@
 
 
 #include <QMessageBox>
+#include <QResizeEvent>
+#include <QTimer>
 #include <QWidget>
 
+namespace {
+
+void includeMapPoint(const QPointF& oPoint,
+                     bool& bHasBounds,
+                     double& dMinX,
+                     double& dMaxX,
+                     double& dMinY,
+                     double& dMaxY)
+{
+    if(!qIsFinite(oPoint.x()) || !qIsFinite(oPoint.y())) {
+        return;
+    }
+
+    if(!bHasBounds) {
+        dMinX = dMaxX = oPoint.x();
+        dMinY = dMaxY = oPoint.y();
+        bHasBounds = true;
+        return;
+    }
+
+    dMinX = qMin(dMinX, oPoint.x());
+    dMaxX = qMax(dMaxX, oPoint.x());
+    dMinY = qMin(dMinY, oPoint.y());
+    dMaxY = qMax(dMaxY, oPoint.y());
+}
+
+void includeMapPoints(const QVector<QPointF>& vecPoints,
+                      bool& bHasBounds,
+                      double& dMinX,
+                      double& dMaxX,
+                      double& dMinY,
+                      double& dMaxY)
+{
+    foreach(const QPointF& oPoint, vecPoints) {
+        includeMapPoint(oPoint, bHasBounds,
+                        dMinX, dMaxX, dMinY, dMaxY);
+    }
+}
+
+}
+
 nmGuiPlot::nmGuiPlot(bool bUseBtns, QWidget *parent) :
-    iGuiPlot(bUseBtns, parent)
+    iGuiPlot(bUseBtns, parent),
+    m_pGraphicBinder(NULL),
+    m_pDataManager(nmDataAnalyzeManager::getCurrentInstance()),
+    m_bApplyingAxisRange(false),
+    m_bAxisInitializationPending(false)
 {
     m_bUseBtns = bUseBtns;
 
@@ -86,8 +133,7 @@ nmGuiPlot::nmGuiPlot(bool bUseBtns, QWidget *parent) :
 
     m_iRegionMarkCount = 0;
 
-    m_pGraphicBinder = new nmPlotGraphicBinder(
-        nmDataAnalyzeManager::getCurrentInstance(), this);
+    m_pGraphicBinder = new nmPlotGraphicBinder(m_pDataManager, this);
 
 }
 
@@ -131,7 +177,6 @@ void nmGuiPlot::initChartView(QString sTitle, QSize szDefault)
     m_pPlot = m_pPlotScene->m_pPlot;
     m_pPlotView->setMargins(0, 0, 0, 0);
     m_pPlotView->setZoomMode(ZxRenderView::eZoomFitWindow, true);
-
     connectSignals();
 
     initDefultGeoObj();
@@ -179,68 +224,21 @@ void nmGuiPlot::cancelActiveTools()
 
 void nmGuiPlot::initDefultGeoObj()
 {
-    // 获取边界数据，来自数据中心
-    nmDataOutline* pOutlineData = nmDataAnalyzeManager::getCurrentInstance()->getOutlineData();
+    nmDataAnalyzeManager* pDataManager = dataManager();
+    if(pDataManager == nullptr) {
+        return;
+    }
 
-    nmDataAxis* pAxisData = nmDataAnalyzeManager::getCurrentInstance()->getAxisData();
+    nmDataAxis* pAxisData = pDataManager->getAxisData();
 
     if(pAxisData == nullptr)	{
         pAxisData = new nmDataAxis;
         // 将 pAxisData 存入数据中心
-        nmDataAnalyzeManager::getCurrentInstance()->setAxisData(pAxisData);
-    }
-
-    // 获取 X 最大值
-    nmDataAttribute xMaxAttr = pAxisData->getXMax();
-    double xMaxValue = xMaxAttr.getValue().toDouble();
-    m_pPlot->getMainAxisX()->setRangeMax(xMaxValue);
-
-    // 获取 Y 最大值
-    nmDataAttribute yMaxAttr = pAxisData->getYMax();
-    double yMaxValue = yMaxAttr.getValue().toDouble();
-    m_pPlot->getMainAxisY()->setRangeMax(yMaxValue);
-
-    // 获取 X 最小值
-    nmDataAttribute xMinAttr = pAxisData->getXMin();
-    double xMinValue = xMinAttr.getValue().toDouble();
-    m_pPlot->getMainAxisX()->setRangeMin(xMinValue);
-
-    // 获取 Y 最小值
-    nmDataAttribute yMinAttr = pAxisData->getYMin();
-    double yMinValue = yMinAttr.getValue().toDouble();
-    m_pPlot->getMainAxisY()->setRangeMin(yMinValue);
-
-    connect(m_pPlot->getMainAxisX(), SIGNAL(sigRangeChanged(double, double, bool, bool)),
-            this, SLOT(onRangeXChanged(double, double, bool, bool)));
-
-    connect(m_pPlot->getMainAxisY(), SIGNAL(sigRangeChanged(double, double, bool, bool)),
-            this, SLOT(onRangeYChanged(double, double, bool, bool)));
-
-    // 数据中心无边界数据，创建默认边界数据
-    if(pOutlineData == nullptr)	{
-        pOutlineData = nmDataAnalyzeManager::getCurrentInstance()->createOutline();
-
-        // 设置默认边界名称
-        pOutlineData->setName("");
-
-        // 设置边界点
-        QVector<QPointF> vecPoints;
-        vecPoints << QPointF(-1000.00, 1000.00)
-                  << QPointF(1000.00, 1000.00)
-                  << QPointF(1000.00, -1000.00)
-                  << QPointF(-1000.00, -1000.00);
-        pOutlineData->setOutlinePoints(vecPoints);
-
-        // 设置边界类型
-        pOutlineData->setOutlineType(NM_Rect_Outline_Type);
-
-        // 设置流型列表（假设全部为0）
-        QVector<int> vecFlowTypes(vecPoints.size(), 0);
-        pOutlineData->setFlowTypeList(vecFlowTypes);
+        pDataManager->setAxisData(pAxisData);
     }
 
     // 获取井数据，来自数据中心
-    QVector<nmDataWellBase*> vecWellDatas = nmDataAnalyzeManager::getCurrentInstance()->getWellDataList();
+    QVector<nmDataWellBase*> vecWellDatas = pDataManager->getWellDataList();
 
     // 数据中心没有一口井数据，添加默认井数据
     if(vecWellDatas.isEmpty()) {
@@ -248,7 +246,7 @@ void nmGuiPlot::initDefultGeoObj()
         ZxDataWell* pWellData = zxCurWell;
 
         if(pWellData == nullptr) {
-            this->setPlotsByDataManger(nmDataAnalyzeManager::getCurrentInstance());
+            this->setPlotsByDataManger(pDataManager);
             return;
         }
 
@@ -258,8 +256,7 @@ void nmGuiPlot::initDefultGeoObj()
                 static_cast<NM_WELL_CATEGORY>(
                     pWellData->getWellTypeIndex());
         if(!nmIsValidWellCategory(eWellCategory)) {
-            this->setPlotsByDataManger(
-                        nmDataAnalyzeManager::getCurrentInstance());
+            this->setPlotsByDataManger(pDataManager);
             return;
         }
 
@@ -327,11 +324,11 @@ void nmGuiPlot::initDefultGeoObj()
 
         if(ZxBaseUtil::isSameStr(wellClass, "VerticalWell")) {
             // 初始化直井默认参数
-            nmDataWellBase* pWell = nmDataAnalyzeManager::getCurrentInstance()->createWell(NM_WELL_MODEL::Vertical_Well);
+            nmDataWellBase* pWell = pDataManager->createWell(NM_WELL_MODEL::Vertical_Well);
             nmDataVerticalWell* m_VerticalWell = dynamic_cast<nmDataVerticalWell*>(pWell);
 
             if(m_VerticalWell == nullptr) {
-                this->setPlotsByDataManger(nmDataAnalyzeManager::getCurrentInstance());
+                this->setPlotsByDataManger(pDataManager);
                 return;
             }
 
@@ -353,7 +350,7 @@ void nmGuiPlot::initDefultGeoObj()
             m_VerticalWell->setFlowPoints(vecPtsF);
 
             // TODO: 计算井的历史双对数/半对数数据
-            nmDataAnalyzeManager::getCurrentInstance()->calculationLogData(m_VerticalWell, vvecHistoryPressureData, vvecHistoryLogData, vvecHistorySemiLogData);
+            pDataManager->calculationLogData(m_VerticalWell, vvecHistoryPressureData, vvecHistoryLogData, vvecHistorySemiLogData);
 
             // 存储历史数据到井对象
             m_VerticalWell->setHistoryPressure(vvecHistoryPressureData);
@@ -361,15 +358,15 @@ void nmGuiPlot::initDefultGeoObj()
             m_VerticalWell->setHistorySemiLog(vvecHistorySemiLogData);
 
             // 设置为当前查看的井
-            nmDataAnalyzeManager::getCurrentInstance()->setCurWellData(m_VerticalWell);
+            pDataManager->setCurWellData(m_VerticalWell);
         } else if(ZxBaseUtil::isSameStr(wellClass, "VerticalFracturedWell")) {
 
             // 初始化垂直裂缝井默认参数
-            nmDataWellBase* pWell = nmDataAnalyzeManager::getCurrentInstance()->createWell(NM_WELL_MODEL::Vertical_Fractured_Well);
+            nmDataWellBase* pWell = pDataManager->createWell(NM_WELL_MODEL::Vertical_Fractured_Well);
             nmDataVerticalFracturedWell* m_VFracturedWell = dynamic_cast<nmDataVerticalFracturedWell*>(pWell);
 
             if(m_VFracturedWell == nullptr) {
-                this->setPlotsByDataManger(nmDataAnalyzeManager::getCurrentInstance());
+                this->setPlotsByDataManger(pDataManager);
                 return;
             }
 
@@ -391,7 +388,7 @@ void nmGuiPlot::initDefultGeoObj()
             m_VFracturedWell->setFlowPoints(vecPtsF);
 
             // TODO: 计算井的历史双对数/半对数数据
-            nmDataAnalyzeManager::getCurrentInstance()->calculationLogData(m_VFracturedWell, vvecHistoryPressureData, vvecHistoryLogData, vvecHistorySemiLogData);
+            pDataManager->calculationLogData(m_VFracturedWell, vvecHistoryPressureData, vvecHistoryLogData, vvecHistorySemiLogData);
 
             // 存储历史数据到井对象
             m_VFracturedWell->setHistoryPressure(vvecHistoryPressureData);
@@ -402,15 +399,15 @@ void nmGuiPlot::initDefultGeoObj()
             m_VFracturedWell->setFracs();
 
             // 设置为当前查看的井
-            nmDataAnalyzeManager::getCurrentInstance()->setCurWellData(m_VFracturedWell);
+            pDataManager->setCurWellData(m_VFracturedWell);
         } else if(ZxBaseUtil::isSameStr(wellClass, "HorizontalMultiFracturedWell")) {
 
             // 初始化多段压裂水平井默认参数
-            nmDataWellBase* pWell = nmDataAnalyzeManager::getCurrentInstance()->createWell(NM_WELL_MODEL::Horizontal_Fractured_Well);
+            nmDataWellBase* pWell = pDataManager->createWell(NM_WELL_MODEL::Horizontal_Fractured_Well);
             nmDataHorizontalFracturedWell* m_HFracturedWell = dynamic_cast<nmDataHorizontalFracturedWell*>(pWell);
 
             if(m_HFracturedWell == nullptr) {
-                this->setPlotsByDataManger(nmDataAnalyzeManager::getCurrentInstance());
+                this->setPlotsByDataManger(pDataManager);
                 return;
             }
 
@@ -432,7 +429,7 @@ void nmGuiPlot::initDefultGeoObj()
             m_HFracturedWell->setFlowPoints(vecPtsF);
 
             // TODO: 计算井的历史双对数/半对数数据
-            nmDataAnalyzeManager::getCurrentInstance()->calculationLogData(m_HFracturedWell, vvecHistoryPressureData, vvecHistoryLogData, vvecHistorySemiLogData);
+            pDataManager->calculationLogData(m_HFracturedWell, vvecHistoryPressureData, vvecHistoryLogData, vvecHistorySemiLogData);
 
             // 存储历史数据到井对象
             m_HFracturedWell->setHistoryPressure(vvecHistoryPressureData);
@@ -443,17 +440,21 @@ void nmGuiPlot::initDefultGeoObj()
             m_HFracturedWell->setFracs();
 
             // 设置为当前查看的井
-            nmDataAnalyzeManager::getCurrentInstance()->setCurWellData(m_HFracturedWell);
+            pDataManager->setCurWellData(m_HFracturedWell);
         }
 
         // 重新获取添加后的井数据
-        nmDataAnalyzeManager::getCurrentInstance()->appendNmWellData(
-            nmDataAnalyzeManager::getCurrentInstance()->getCurWellData());
-        vecWellDatas = nmDataAnalyzeManager::getCurrentInstance()->getWellDataList();
+        pDataManager->appendNmWellData(pDataManager->getCurWellData());
+        vecWellDatas = pDataManager->getWellDataList();
+    }
+
+    // 极端兼容入口没有预先建立边界时，也按当前井位置创建一次性默认边界。
+    if(pDataManager->getOutlineData() == nullptr) {
+        pDataManager->createDefaultOutlineFromWells();
     }
 
     // 根据数据中心的数据渲染所有的图元，上面只是为了保证打开时有一口井和边界
-    this->setPlotsByDataManger(nmDataAnalyzeManager::getCurrentInstance());
+    this->setPlotsByDataManger(pDataManager);
 }
 
 void nmGuiPlot::initAxisFromData(nmDataAnalyzeManager* pDataManager)
@@ -461,33 +462,39 @@ void nmGuiPlot::initAxisFromData(nmDataAnalyzeManager* pDataManager)
     Q_ASSERT(nullptr !=  pDataManager);
     // 0.坐标轴
     // 0.1 获取坐标轴数据，来自数据中心
-    nmDataAxis* pAxisData = nmDataAnalyzeManager::getCurrentInstance()->getAxisData();
+    nmDataAxis* pAxisData = pDataManager->getAxisData();
     Q_ASSERT(nullptr !=  pAxisData);
 
     // 0.2 获取 X 最大值
     nmDataAttribute xMaxAttr = pAxisData->getXMax();
     double xMaxValue = xMaxAttr.getValue().toDouble();
-    m_pPlot->getMainAxisX()->setRangeMax(xMaxValue);
 
     // 0.3 获取 Y 最大值
     nmDataAttribute yMaxAttr = pAxisData->getYMax();
     double yMaxValue = yMaxAttr.getValue().toDouble();
-    m_pPlot->getMainAxisY()->setRangeMax(yMaxValue);
 
     // 0.4 获取 X 最小值
     nmDataAttribute xMinAttr = pAxisData->getXMin();
     double xMinValue = xMinAttr.getValue().toDouble();
-    m_pPlot->getMainAxisX()->setRangeMin(xMinValue);
 
     // 0.5 获取 Y 最小值
     nmDataAttribute yMinAttr = pAxisData->getYMin();
     double yMinValue = yMinAttr.getValue().toDouble();
-    m_pPlot->getMainAxisY()->setRangeMin(yMinValue);
+
+    if(qIsFinite(xMinValue) && qIsFinite(xMaxValue) &&
+       qIsFinite(yMinValue) && qIsFinite(yMaxValue) &&
+       xMaxValue > xMinValue && yMaxValue > yMinValue) {
+        applyAxisRange(xMinValue, xMaxValue, yMinValue, yMaxValue);
+    } else {
+        pAxisData->setInitialViewFitted(false);
+    }
 
     connect(m_pPlot->getMainAxisX(), SIGNAL(sigRangeChanged(double, double, bool, bool)),
-            this, SLOT(onRangeXChanged(double, double, bool, bool)));
+            this, SLOT(onRangeXChanged(double, double, bool, bool)),
+            Qt::UniqueConnection);
     connect(m_pPlot->getMainAxisY(), SIGNAL(sigRangeChanged(double, double, bool, bool)),
-            this, SLOT(onRangeYChanged(double, double, bool, bool)));
+            this, SLOT(onRangeYChanged(double, double, bool, bool)),
+            Qt::UniqueConnection);
 }
 
 void nmGuiPlot::initBoundaryObjFromData(nmDataAnalyzeManager* pDataManager)
@@ -785,13 +792,17 @@ void nmGuiPlot::initRegionMarkObjsFromData(nmDataAnalyzeManager* pDataManager)
 
 void nmGuiPlot::deleteAllPlotObjs()
 {
-    QVector<nmObjBase*> vecObjs = this->getAllPlots();
+    if(m_pPlot == nullptr) {
+        return;
+    }
 
-    foreach(nmObjBase* pObj, vecObjs) {
-        // 1、移除图元
-        m_pPlot->removeObjByName(pObj->getName());
-        // 2、清理数据
-        //pObj->removeData();
+    // 这里只清理显示对象，不能调用removeData()删除DataManager中的业务数据。
+    // 先解除全部绑定，再倒序删除图元，避免重名对象残留或Binder保存悬空指针。
+    if(m_pGraphicBinder != nullptr) {
+        m_pGraphicBinder->updateDataMgr(dataManager());
+    }
+    for(int nIndex = m_pPlot->getObjCount() - 1; nIndex >= 0; --nIndex) {
+        m_pPlot->removeObjByIndex(nIndex);
     }
 }
 
@@ -1493,9 +1504,222 @@ void nmGuiPlot::deleteAllDFNPlots()
     }
 }
 
+nmDataAnalyzeManager* nmGuiPlot::dataManager() const
+{
+    return m_pDataManager != nullptr
+            ? m_pDataManager
+            : nmDataAnalyzeManager::getCurrentInstance();
+}
+
+bool nmGuiPlot::calculateVisibleContentBounds(QRectF& oBounds) const
+{
+    nmDataAnalyzeManager* pDataManager = dataManager();
+    if(pDataManager == nullptr) {
+        return false;
+    }
+
+    bool bHasBounds = false;
+    double dMinX = 0.0;
+    double dMaxX = 0.0;
+    double dMinY = 0.0;
+    double dMaxY = 0.0;
+
+    nmDataOutline* pOutlineData = pDataManager->getOutlineData();
+    if(pOutlineData != nullptr && pOutlineData->getPlotVisible()) {
+        if(pOutlineData->getOutlineType() == NM_Round_Outline_Type) {
+            const QPointF oCenter = pOutlineData->getCenter();
+            const double dRadius = qAbs(pOutlineData->getRadius());
+            includeMapPoint(QPointF(oCenter.x() - dRadius,
+                                    oCenter.y() - dRadius),
+                            bHasBounds, dMinX, dMaxX, dMinY, dMaxY);
+            includeMapPoint(QPointF(oCenter.x() + dRadius,
+                                    oCenter.y() + dRadius),
+                            bHasBounds, dMinX, dMaxX, dMinY, dMaxY);
+        } else {
+            includeMapPoints(pOutlineData->getOutlinePoints(),
+                             bHasBounds, dMinX, dMaxX, dMinY, dMaxY);
+        }
+    }
+
+    const QVector<nmDataWellBase*> vecWells = pDataManager->getWellDataList();
+    foreach(nmDataWellBase* pWellData, vecWells) {
+        if(pWellData != nullptr && pWellData->getPlotVisible()) {
+            includeMapPoint(QPointF(
+                    pWellData->getX().getValue().toDouble(),
+                    pWellData->getY().getValue().toDouble()),
+                    bHasBounds, dMinX, dMaxX, dMinY, dMaxY);
+        }
+    }
+
+    const QVector<nmDataFault*> vecFaults = pDataManager->getFaultDataList();
+    foreach(nmDataFault* pFaultData, vecFaults) {
+        if(pFaultData != nullptr && pFaultData->getPlotVisible()) {
+            includeMapPoints(pFaultData->getFaultPoints(),
+                             bHasBounds, dMinX, dMaxX, dMinY, dMaxY);
+        }
+    }
+
+    const QVector<nmDataFracture*> vecFractures =
+            pDataManager->getFractureDataList();
+    foreach(nmDataFracture* pFractureData, vecFractures) {
+        if(pFractureData != nullptr && pFractureData->getPlotVisible()) {
+            includeMapPoints(pFractureData->getFracturePoints(),
+                             bHasBounds, dMinX, dMaxX, dMinY, dMaxY);
+        }
+    }
+
+    const QVector<nmDataRegion*> vecRegions = pDataManager->getRegionDataList();
+    foreach(nmDataRegion* pRegionData, vecRegions) {
+        if(pRegionData != nullptr && pRegionData->getPlotVisible()) {
+            includeMapPoints(pRegionData->getVecPts(),
+                             bHasBounds, dMinX, dMaxX, dMinY, dMaxY);
+        }
+    }
+
+    const QVector<nmDataRegionMark*> vecRegionMarks =
+            pDataManager->getRegionMarkDataList();
+    foreach(nmDataRegionMark* pRegionMarkData, vecRegionMarks) {
+        if(pRegionMarkData != nullptr && pRegionMarkData->getPlotVisible()) {
+            includeMapPoint(pRegionMarkData->getPtPos(),
+                            bHasBounds, dMinX, dMaxX, dMinY, dMaxY);
+        }
+    }
+
+    if(!bHasBounds) {
+        return false;
+    }
+
+    oBounds = QRectF(QPointF(dMinX, dMinY),
+                     QPointF(dMaxX, dMaxY)).normalized();
+    return true;
+}
+
+void nmGuiPlot::applyAxisRange(double dXMin, double dXMax,
+                               double dYMin, double dYMax)
+{
+    if(m_pPlot == nullptr ||
+       !qIsFinite(dXMin) || !qIsFinite(dXMax) ||
+       !qIsFinite(dYMin) || !qIsFinite(dYMax) ||
+       dXMax <= dXMin || dYMax <= dYMin) {
+        return;
+    }
+
+    const bool bOldApplying = m_bApplyingAxisRange;
+    m_bApplyingAxisRange = true;
+    m_pPlot->getMainAxisX()->setRangeMinMax(dXMin, dXMax, true, false);
+    m_pPlot->getMainAxisY()->setRangeMinMax(dYMin, dYMax, true, false);
+
+    nmDataAnalyzeManager* pDataManager = dataManager();
+    nmDataAxis* pAxisData = pDataManager != nullptr
+            ? pDataManager->getAxisData() : nullptr;
+    if(pAxisData != nullptr) {
+        pAxisData->getXMin().setValue(dXMin);
+        pAxisData->getXMax().setValue(dXMax);
+        pAxisData->getYMin().setValue(dYMin);
+        pAxisData->getYMax().setValue(dYMax);
+    }
+    m_bApplyingAxisRange = bOldApplying;
+}
+
+bool nmGuiPlot::fitInitialAxisToContent()
+{
+    if(m_pPlot == nullptr) {
+        return false;
+    }
+
+    QRectF oBounds;
+    if(!calculateVisibleContentBounds(oBounds)) {
+        return false;
+    }
+
+    QRectF oPlotRect = m_pPlot->getInnerRectF();
+    if(oPlotRect.width() <= 0.0 || oPlotRect.height() <= 0.0) {
+        return false;
+    }
+
+    double dCenterX = (oBounds.left() + oBounds.right()) * 0.5;
+    double dCenterY = (oBounds.top() + oBounds.bottom()) * 0.5;
+    double dRangeX = oBounds.width();
+    double dRangeY = oBounds.height();
+
+    // 退化为点或直线时补足基础跨度，避免产生零范围坐标轴。
+    if(dRangeX <= 0.0) {
+        dRangeX = 1500.0;
+    }
+    if(dRangeY <= 0.0) {
+        dRangeY = 1500.0;
+    }
+
+    // 内容四周各增加最大边长的 5%，边界本身不因此发生变化。
+    const double dPadding = qMax(dRangeX, dRangeY) * 0.05;
+    dRangeX += dPadding * 2.0;
+    dRangeY += dPadding * 2.0;
+
+    const double dViewRatio = oPlotRect.width() / oPlotRect.height();
+    const double dContentRatio = dRangeX / dRangeY;
+    if(dContentRatio < dViewRatio) {
+        dRangeX = dRangeY * dViewRatio;
+    } else {
+        dRangeY = dRangeX / dViewRatio;
+    }
+
+    applyAxisRange(dCenterX - dRangeX * 0.5,
+                   dCenterX + dRangeX * 0.5,
+                   dCenterY - dRangeY * 0.5,
+                   dCenterY + dRangeY * 0.5);
+    return true;
+}
+
+void nmGuiPlot::scheduleInitialAxisView()
+{
+    if(m_bAxisInitializationPending) {
+        return;
+    }
+
+    m_bAxisInitializationPending = true;
+    QTimer::singleShot(0, this, SLOT(initializeAxisView()));
+}
+
+void nmGuiPlot::initializeAxisView()
+{
+    m_bAxisInitializationPending = false;
+    nmDataAnalyzeManager* pDataManager = dataManager();
+    nmDataAxis* pAxisData = pDataManager != nullptr
+            ? pDataManager->getAxisData() : nullptr;
+    if(pAxisData == nullptr || pAxisData->isInitialViewFitted()) {
+        return;
+    }
+
+    // 只有真实绘图区和图元均准备好后才封闭初始化，失败时等待下一次显示尺寸变化。
+    if(fitInitialAxisToContent()) {
+        pAxisData->setInitialViewFitted(true);
+    }
+}
+
+void nmGuiPlot::resizeEvent(QResizeEvent* pEvent)
+{
+	nmDataAnalyzeManager* pDataManager = dataManager();
+	nmDataAxis* pAxisData = pDataManager != nullptr
+			? pDataManager->getAxisData() : nullptr;
+	const bool bWaitingForInitialView =
+			pAxisData != nullptr && !pAxisData->isInitialViewFitted();
+	const bool bOldApplying = m_bApplyingAxisRange;
+	if(bWaitingForInitialView) {
+		// 布局阶段可能触发轴信号，不能把它误认为用户已经设置了范围。
+		m_bApplyingAxisRange = true;
+	}
+    iGuiPlot::resizeEvent(pEvent);
+	m_bApplyingAxisRange = bOldApplying;
+	if(bWaitingForInitialView) {
+		scheduleInitialAxisView();
+	}
+}
+
 void nmGuiPlot::onRangeXChanged(double dMin, double dMax, bool bRecalTicks, bool bAdjustRectZoomRatio)
 {
-    nmDataAxis* pAxisData = nmDataAnalyzeManager::getCurrentInstance()->getAxisData();
+    nmDataAnalyzeManager* pDataManager = dataManager();
+    nmDataAxis* pAxisData = pDataManager != nullptr
+            ? pDataManager->getAxisData() : nullptr;
 
     if(pAxisData == nullptr) {
         return;
@@ -1506,11 +1730,18 @@ void nmGuiPlot::onRangeXChanged(double dMin, double dMax, bool bRecalTicks, bool
 
     // 获取 X 最小值
     pAxisData->getXMin().setValue(dMin);
+
+    if(!m_bApplyingAxisRange) {
+        // 任一用户轴操作都终止首次初始化，后续范围完全由用户控制。
+        pAxisData->setInitialViewFitted(true);
+    }
 }
 
 void nmGuiPlot::onRangeYChanged(double dMin, double dMax, bool bRecalTicks, bool bAdjustRectZoomRatio)
 {
-    nmDataAxis* pAxisData = nmDataAnalyzeManager::getCurrentInstance()->getAxisData();
+    nmDataAnalyzeManager* pDataManager = dataManager();
+    nmDataAxis* pAxisData = pDataManager != nullptr
+            ? pDataManager->getAxisData() : nullptr;
 
     if(pAxisData == nullptr) {
         return;
@@ -1521,6 +1752,10 @@ void nmGuiPlot::onRangeYChanged(double dMin, double dMax, bool bRecalTicks, bool
 
     // 获取 Y 最小值
     pAxisData->getYMin().setValue(dMin);
+
+    if(!m_bApplyingAxisRange) {
+        pAxisData->setInitialViewFitted(true);
+    }
 }
 
 // ============================== 可见性设置方法实现 ==============================
@@ -1762,6 +1997,25 @@ void nmGuiPlot::finishMeasure()
 
 bool nmGuiPlot::setPlotsByDataManger(nmDataAnalyzeManager* pDataManager)
 {
+    if(pDataManager == nullptr || m_pPlot == nullptr) {
+        return false;
+    }
+
+    // 本函数按DataManager完整重建Map，重复调用也只能保留一套图元。
+    // 清理过程不删除业务数据，因此同一分析刷新和跨分析切换可使用同一路径。
+    deleteAllPlotObjs();
+    if(m_pGraphicBinder != nullptr) {
+        m_pGraphicBinder->updateDataMgr(pDataManager);
+    }
+    m_pDataManager = pDataManager;
+	nmDataAxis* pAxisData = pDataManager->getAxisData();
+	const bool bWaitingForInitialView =
+			pAxisData != nullptr && !pAxisData->isInitialViewFitted();
+	const bool bOldApplying = m_bApplyingAxisRange;
+	if(bWaitingForInitialView) {
+		// 图元创建过程可能发出轴范围信号，首次适配完成前统一按内部更新处理。
+		m_bApplyingAxisRange = true;
+	}
     // 0.坐标轴
     this->initAxisFromData(pDataManager);
     // 1.边界
@@ -1776,6 +2030,12 @@ bool nmGuiPlot::setPlotsByDataManger(nmDataAnalyzeManager* pDataManager)
     this->initRegionObjsFromData(pDataManager);
     // 6.区域标记
     this->initRegionMarkObjsFromData(pDataManager);
+	m_bApplyingAxisRange = bOldApplying;
+
+    if(pAxisData != nullptr && !pAxisData->isInitialViewFitted()) {
+        // 等本轮布局和坐标轴内边距稳定后只初始化一次。
+        scheduleInitialAxisView();
+    }
 
     return true;
 }
diff --git a/Src/nmNum/nmSubWnd/nmSubWndMain.cpp b/Src/nmNum/nmSubWnd/nmSubWndMain.cpp
index f1b04b8..6798e82 100644
--- a/Src/nmNum/nmSubWnd/nmSubWndMain.cpp
+++ b/Src/nmNum/nmSubWnd/nmSubWndMain.cpp
@@ -2893,14 +2893,6 @@ void nmSubWndMain::updateMapByDataManager(nmDataAnalyzeManager* pDataManager)
     // 更新对应的Plot成员变量
     pDataManager->setPlot(m_pWxPlot);
 
-    m_pWxPlot->deleteAllPlotObjs();
-
-    // 切换分析时更新 Binder 绑定的 DataManager，
-    // 确保用户新画断层时添加到正确的 DataManager
-    if(m_pWxPlot->graphicBinder()) {
-        m_pWxPlot->graphicBinder()->updateDataMgr(pDataManager);
-    }
-
-    // 根据数据中心内容绘制新图元
+    // 完整清理、Binder切换和快照刷新均由Map重建入口统一完成。
     m_pWxPlot->setPlotsByDataManger(pDataManager);
 }
diff --git a/Src/nmNum/nmSubWnd/nmSubWndUtils.cpp b/Src/nmNum/nmSubWnd/nmSubWndUtils.cpp
index e7ab2eb..a04ce78 100644
--- a/Src/nmNum/nmSubWnd/nmSubWndUtils.cpp
+++ b/Src/nmNum/nmSubWnd/nmSubWndUtils.cpp
@@ -518,7 +518,7 @@ bool nmSubWndUtils::fillNmDockWxs(iSubWnd* pSubWnd)
     if(pAxisData == nullptr)	{
         pAxisData = new nmDataAxis;
         // 将 pAxisData 存入数据中心
-        nmDataAnalyzeManager::getCurrentInstance()->setAxisData(pAxisData);
+        pDataManager->setAxisData(pAxisData);
     }
 
     // 读取解析解的参数
@@ -659,28 +659,11 @@ bool nmSubWndUtils::fillNmDockWxs(iSubWnd* pSubWnd)
             pOutlineData->setOutlinePoints(vecPoints);
         }
     } else {
-        // 如果解析解这里没有设置边界，数值解设置默认边界
-        // 创建默认矩形边界数据对象
-        nmDataOutline* pDefaultOutlineData = pDataManager->createOutline();
-        if(pDefaultOutlineData == nullptr) {
+        // 解析解未提供边界时，按当前数值井位置创建一次性默认边界。
+        if(!pDataManager->createDefaultOutlineFromWells()) {
             return showNmDockInitializationError(
                 tr("The default numerical boundary could not be created."));
         }
-        Q_ASSERT(pDefaultOutlineData);
-        // 默认名称留空，由界面根据边界类型进行翻译显示。
-        pDefaultOutlineData->setName("");
-        // 设置边界点
-        QVector<QPointF> vecPoints;
-        vecPoints << QPointF(-1000.00, 1000.00)
-                  << QPointF(1000.00, 1000.00)
-                  << QPointF(1000.00, -1000.00)
-                  << QPointF(-1000.00, -1000.00);
-        pDefaultOutlineData->setOutlinePoints(vecPoints);
-        // 设置边界类型
-        pDefaultOutlineData->setOutlineType(NM_Rect_Outline_Type);
-        // 设置流型列表（假设全部为0）
-        QVector<int> vecFlowTypes(vecPoints.size(), 0);
-        pDefaultOutlineData->setFlowTypeList(vecFlowTypes);
     }
 
     // 1.6 创建时间步设置相关数据