ARCEngine中定义投影：WGS1984，Beijing1954

我不是女神ヾ 2021-09-17 09:10 426阅读 0赞

**目录**

WGS1984：

Beijing1954：

--------------------

# WGS1984： #

private void wGS1954ToolStripMenuItem_Click(object sender, EventArgs e)
            {
                ChoseLayer Choseform = new ChoseLayer();
                int layerName;
    
                IFeatureLayer pFeatureLayer;
                if (Choseform.ShowDialog() == DialogResult.OK)
                {
                    layerName = Choseform.layerindex;
                    pFeatureLayer = axMapControl1.get_Layer(layerName) as IFeatureLayer;
                    try
                    {
                        IFeatureClass pFeatureClass = pFeatureLayer.FeatureClass;
                        IGeoDataset pGeoDataset = pFeatureClass as IGeoDataset;
                        IGeoDatasetSchemaEdit pGeoDatasetSchemaEdit = pGeoDataset as IGeoDatasetSchemaEdit;
                        if (pGeoDatasetSchemaEdit.CanAlterSpatialReference == true)
                        {
                            ISpatialReferenceFactory2 pSpaRefFactory = new SpatialReferenceEnvironmentClass();
                            IGeographicCoordinateSystem pNewGeoSys = pSpaRefFactory.CreateGeographicCoordinateSystem((int)esriSRGeoCSType.esriSRGeoCS_WGS1984);
                            pGeoDatasetSchemaEdit.AlterSpatialReference(pNewGeoSys);
                        }
                        Choseform.Dispose();
                        MessageBox.Show("已将图层坐标系定义为WGS1984", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    }
                    catch (Exception Err)
                    {
                        MessageBox.Show(Err.Message, "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    }
                }
            }

# Beijing1954： #

private void beijing1954ToolStripMenuItem_Click(object sender, EventArgs e)
            {
                ChoseLayer Choseform = new ChoseLayer();
                int layerName;
    
                IFeatureLayer pFeatureLayer;
                if (Choseform.ShowDialog() == DialogResult.OK)
                {
                    layerName = Choseform.layerindex;
                    pFeatureLayer = axMapControl1.get_Layer(layerName) as IFeatureLayer;
                    try
                    {
                        IFeatureClass pFeatureClass = pFeatureLayer.FeatureClass;
                        IGeoDataset pGeoDataset = pFeatureClass as IGeoDataset;
                        IGeoDatasetSchemaEdit pGeoDatasetSchemaEdit = pGeoDataset as IGeoDatasetSchemaEdit;
                        if (pGeoDatasetSchemaEdit.CanAlterSpatialReference == true)
                        {
                            ISpatialReferenceFactory2 pSpaRefFactory = new SpatialReferenceEnvironmentClass();
                            IGeographicCoordinateSystem pNewGeoSys = pSpaRefFactory.CreateGeographicCoordinateSystem((int)esriSRGeoCSType.esriSRGeoCS_Beijing1954);
                            pGeoDatasetSchemaEdit.AlterSpatialReference(pNewGeoSys);
                        }
                        Choseform.Dispose();
                        MessageBox.Show("已将图层坐标系定义为Beijing1954", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    }
                    catch (Exception Err)
                    {
                        MessageBox.Show(Err.Message, "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    }
                }
            }