public void CopySubsetWithAttributes()
{
IFeatureSet fs = BuildFeatureSet();
IFeatureSet res = fs.CopySubset(string.Empty);
Assert.AreEqual(res.Features.Count, 3);
Assert.AreEqual(res.Features[0].DataRow["Test"], "hello");
IFeatureSet res2 = fs.CopySubset("[Test] = 'hello'");
Assert.AreEqual(res2.Features.Count, 2);
Assert.AreEqual(res2.Features[0].DataRow["Test"], "hello");
}
public void CopySubsetWithoutAttributes()
{
IFeatureSet fs = BuildFeatureSet();
IFeatureSet res3 = fs.CopySubset(string.Empty, false);
Assert.AreEqual(res3.Features.Count, 3);
Assert.AreEqual(res3.Features[0].DataRow.ItemArray.Length, 0);
IFeatureSet res4 = fs.CopySubset("[Test] = 'hello'", false);
Assert.AreEqual(res4.Features.Count, 2);
Assert.AreEqual(res4.Features[0].DataRow.ItemArray.Length, 0);
}
/// <summary>
/// Spatial query using OGR
/// </summary>
/// <param name="featureSet">FeatureSet</param>
/// <param name="region">Spatial region</param>
/// <returns>Selected features</returns>
public static IFeatureSet OgrSpatialQuery(IFeatureSet featureSet, IFeatureSet region)
{
List <int> featureList = OgrSpatialFilter(featureSet, region);
IFeatureSet result = featureSet.CopySubset(featureList);
return(result);
}
/// <summary>
/// Spatial query using DotSpatial
/// </summary>
/// <param name="featureSet">FeatureSet</param>
/// <param name="region">Spatial region</param>
/// <returns>Selected features</returns>
public static IFeatureSet SpatialQuery(IFeatureSet featureSet, IFeatureSet region)
{
List <int> indexList = SpatialFilter(featureSet, region);
IFeatureSet resultSet = featureSet.CopySubset(indexList);
return(resultSet);
}
/// <summary>
/// Executes the ReprojectFeatureSet Operation tool programmatically.
/// </summary>
/// <param name="featureSet">The input FeatureSet.</param>
/// <param name="sourceProjection">The input Expression string to select features to Delete.</param>
/// <param name="destProjection">The target projected coordinate system to reproject the featureset to</param>
/// <param name="output">The output FeatureSet.</param>
/// <param name="cancelProgressHandler">The progress handler.</param>
/// <returns>True, if executed successfully.</returns>
public bool Execute(IFeatureSet featureSet, ProjectionInfo sourceProjection, ProjectionInfo destProjection, IFeatureSet output, ICancelProgressHandler cancelProgressHandler)
{
string filename = output.Filename;
output = featureSet.CopySubset(string.Empty);
if (sourceProjection != null)
{
output.Projection = sourceProjection;
}
output.Reproject(destProjection);
output.SaveAs(filename, true);
return(true);
}
private IFeatureSet CorrectFeatures(IFeatureSet featureSet)
{
IFeatureSet corFeatureSet = featureSet;
List <int> corList = new List <int>();
for (int i = 0; i < featureSet.ShapeIndices.Count; i++)
{
try
{
IFeature feature = featureSet.GetFeature(i);
IFeatureSet reFeatureSet = new FeatureSet();
reFeatureSet.Features.Add(feature);
//有待检验能否检测出其他异常
reFeatureSet.SelectByAttribute("");
corList.Add(i);
}
catch
{
//featureSet.Features.RemoveAt(i);
}
}
corFeatureSet = corFeatureSet.CopySubset(corList);
return(corFeatureSet);
}
/// <summary>
/// Spatial filter using DotSpatial
/// </summary>
/// <param name="featureSet">FeatureSet</param>
/// <param name="region">Spatial region</param>
/// <param name="filterExpression">SQL expression</param>
/// <returns>Indexs of selected features</returns>
public static List <int> Filter(IFeatureSet featureSet, IFeatureSet region, string filterExpression)
{
IGeometry geometry = GetGeometry(region);
return(SpatialFilter(featureSet.CopySubset(filterExpression), geometry));
}
/// <summary>
/// Spatial query using DotSpatial
/// </summary>
/// <param name="featureSet">FeatureSet</param>
/// <param name="geometry">Spatial geometry</param>
/// <param name="filterExpression">SQL expression</param>
/// <returns>Selected features</returns>
public static IFeatureSet Query(IFeatureSet featureSet, IGeometry geometry, string filterExpression)
{
return(SpatialQuery(featureSet.CopySubset(filterExpression), geometry));
}
/// <summary>
/// Spatial query using DotSpatial
/// </summary>
/// <param name="featureSet">FeatureSet</param>
/// <param name="region">Spatial region</param>
/// <param name="filterExpression">SQL expression</param>
/// <returns>Selected features</returns>
public static IFeatureSet Query(IFeatureSet featureSet, IFeatureSet region, string filterExpression)
{
return(SpatialQuery(featureSet.CopySubset(filterExpression), region));
}