diff --git a/include/Data/DataSeries.h b/include/Data/DataSeries.h
index 8bdabac..9e5586c 100644
--- a/include/Data/DataSeries.h
+++ b/include/Data/DataSeries.h
@@ -319,7 +319,7 @@ public:
             std::make_unique<dataseries_detail::IteratorValue<Dim, true> >(*this, false)}};
     }
 
-    void erase(DataSeriesIterator first, DataSeriesIterator last)
+    virtual void erase(DataSeriesIterator first, DataSeriesIterator last)
     {
         auto firstImpl
             = dynamic_cast<dataseries_detail::IteratorValue<Dim, false> *>(first->impl());
@@ -331,7 +331,7 @@ public:
         }
     }
 
-    void insert(DataSeriesIterator first, DataSeriesIterator last, bool prepend = false)
+    virtual void insert(DataSeriesIterator first, DataSeriesIterator last, bool prepend = false)
     {
         auto firstImpl = dynamic_cast<dataseries_detail::IteratorValue<Dim, true> *>(first->impl());
         auto lastImpl = dynamic_cast<dataseries_detail::IteratorValue<Dim, true> *>(last->impl());
diff --git a/include/Data/SpectrogramSeries.h b/include/Data/SpectrogramSeries.h
index 7155b3e..79e649e 100644
--- a/include/Data/SpectrogramSeries.h
+++ b/include/Data/SpectrogramSeries.h
@@ -33,7 +33,26 @@ public:
 
     inline double xResolution() const noexcept { return m_XResolution; }
 
+    void erase(DataSeriesIterator first, DataSeriesIterator last) override
+    {
+        DataSeries<2>::erase(first,last);
+        updateResolution();
+    }
+
+    void insert(DataSeriesIterator first, DataSeriesIterator last, bool prepend = false) override
+    {
+        DataSeries<2>::insert(first,last, prepend);
+        updateResolution();
+    }
+
+    void merge(IDataSeries *dataSeries) override
+    {
+        DataSeries<2>::merge(dataSeries);
+        updateResolution();
+    }
+
 private:
+    void updateResolution();
     double m_XResolution; ///< Resolution used on x-axis to build the spectrogram
 };
 
diff --git a/src/Data/SpectrogramSeries.cpp b/src/Data/SpectrogramSeries.cpp
index 81b8500..9345879 100644
--- a/src/Data/SpectrogramSeries.cpp
+++ b/src/Data/SpectrogramSeries.cpp
@@ -25,7 +25,7 @@ SpectrogramSeries::SpectrogramSeries(std::shared_ptr<ArrayData<1> > xAxisData,
 {
     if(std::isnan(m_XResolution))
     {
-        //m_XResolution = DataSeriesUtils::resolution(xAxisData->begin(), xAxisData->end()).m_Val;
+        updateResolution();
     }
 }
 
@@ -53,3 +53,9 @@ std::shared_ptr<IDataSeries> SpectrogramSeries::subDataSeries(const DateTimeRang
         std::make_shared<ArrayData<2> >(subValuesData.toStdVector(), yAxis.size()),
         this->valuesUnit(), std::move(yAxis));
 }
+
+void SpectrogramSeries::updateResolution()
+{
+    auto xAxisData = this->xAxisData()->cdata();
+    m_XResolution = DataSeriesUtils::resolution(xAxisData.begin(), xAxisData.end()).m_Val;
+}
diff --git a/src/pybind11_wrappers/CoreWrappers.cpp b/src/pybind11_wrappers/CoreWrappers.cpp
index 26620ce..3b3c2dd 100644
--- a/src/pybind11_wrappers/CoreWrappers.cpp
+++ b/src/pybind11_wrappers/CoreWrappers.cpp
@@ -90,6 +90,9 @@ PYBIND11_MODULE(pysciqlopcore,m){
     }, py::keep_alive<0, 1>())
             .def("__repr__",__repr__<IDataSeries>);
 
+    py::class_<ArrayData<1>, std::shared_ptr<ArrayData<1>> >(m,"ArrayData1d")
+            .def("cdata", [](ArrayData<1>& array) {return array.cdata();});
+
     py::class_<ScalarSeries, std::shared_ptr<ScalarSeries>, IDataSeries>(m, "ScalarSeries")
             .def("nbPoints", &ScalarSeries::nbPoints);
 
@@ -97,10 +100,12 @@ PYBIND11_MODULE(pysciqlopcore,m){
             .def("nbPoints", &VectorSeries::nbPoints);
 
     py::class_<DataSeries<2>, std::shared_ptr<DataSeries<2>>, IDataSeries>(m,"DataSeries2d")
+            .def_property_readonly("xAxis", py::overload_cast<>(&DataSeries<2>::xAxisData, py::const_))
             .def_property_readonly("yAxis", py::overload_cast<>(&DataSeries<2>::yAxis, py::const_));
 
     py::class_<SpectrogramSeries, std::shared_ptr<SpectrogramSeries>, DataSeries<2>>(m, "SpectrogramSeries")
-            .def("nbPoints", &SpectrogramSeries::nbPoints);
+            .def("nbPoints", &SpectrogramSeries::nbPoints)
+            .def("xRes", &SpectrogramSeries::xResolution);
 
 
     py::class_<IDataProvider, std::shared_ptr<IDataProvider>>(m, "IDataProvider");