}//误点
private void button1_Click(object sender, EventArgs e)
{
//define the projections
map1.Projection = KnownCoordinateSystems.Projected.UtmNad1983.NAD1983UTMZone12N;
map2.Projection = KnownCoordinateSystems.Projected.NorthAmerica.NorthAmericaAlbersEqualAreaConic;
map3.Projection = KnownCoordinateSystems.Projected.NorthAmerica.USAContiguousLambertConformalConic;
map4.Projection = KnownCoordinateSystems.Projected.World.CylindricalEqualAreaworld;
map5.Projection = KnownCoordinateSystems.Projected.Polar.NorthPoleAzimuthalEquidistant;
map6.Projection = KnownCoordinateSystems.Projected.NorthAmerica.USAContiguousAlbersEqualAreaConicUSGS;
//add the layers
OpenFileDialog fileDialog = new OpenFileDialog();
fileDialog.Filter = "Shapefiles|*.shp";
if (fileDialog.ShowDialog() == DialogResult.OK)
{
//add layer to first map
FeatureSet featureSet1 = new FeatureSet();
featureSet1.Open(fileDialog.FileName);
//Populate the FiledName dropdownlist with the help of featureset1.
//We need to pass featureset as an input paramter to FillColumnNames method.
FillColumnNames(featureSet1);
//set the projection
featureSet1.Reproject(map1.Projection);
map1.Layers.Add(featureSet1);
//add layer to second map
FeatureSet featureSet2 = new FeatureSet();
featureSet2.Open(fileDialog.FileName);
featureSet2.Reproject(map2.Projection);
map2.Layers.Add(featureSet2);
//add layer to map3
FeatureSet featureSet3 = new FeatureSet();
featureSet3.Open(fileDialog.FileName);
featureSet3.Reproject(map3.Projection);
map3.Layers.Add(featureSet3);
//add layer to map4
FeatureSet featureSet4 = new FeatureSet();
featureSet4.Open(fileDialog.FileName);
featureSet4.Reproject(map4.Projection);
map4.Layers.Add(featureSet4);
//add layer to map5
FeatureSet featureSet5 = new FeatureSet();
featureSet5.Open(fileDialog.FileName);
featureSet5.Reproject(map5.Projection);
map5.Layers.Add(featureSet5);
//add layer to map6
FeatureSet featureSet6 = new FeatureSet();
featureSet6.Open(fileDialog.FileName);
featureSet6.Reproject(map6.Projection);
map6.Layers.Add(featureSet6);
}
}//误点
public static List <IFeature> ReprojectPolygonsToWGS84(FeatureSet polygons)
{
if (polygons == null)
{
throw new ArgumentNullException("polygons");
}
polygons.Reproject(_wgs84Projection);
return(Enumerable.ToList(polygons.Features));
}
public static IGeometry Project(IGeometry geometry, ProjectionInfo pStart, ProjectionInfo pEnd)
{
var featureSet = new FeatureSet();
featureSet.AddFeature(geometry.ToDotSpatial());
featureSet.Projection = pStart;
featureSet.Reproject(pEnd);
return
(GeometryConverter.ToGeoAPI(
((featureSet.Features[0].BasicGeometry as DotSpatial.Topology.IGeometry))));
}
/// <summary>
/// Get X,Y axis expressed by longitude and latitude
/// </summary>
/// <returns>mat[2][], mat[0] is longitude, mat[1] is latitude </returns>
public float[][] GetLonLatAxis()
{
var lonlat = new float[2][];
lonlat[0] = new float[ColumnCount];
lonlat[1] = new float[RowCount];
var wgs84 = ProjectionInfo.FromEpsgCode(4326);
IFeatureSet fs_lon = new FeatureSet(FeatureType.Point);
fs_lon.Projection = this.Projection;
for (int c = 0; c < ColumnCount; c++)
{
var vertice = LocateCentroid(c + 1, 1);
Point pt = new Point(vertice);
fs_lon.AddFeature(pt);
}
if (fs_lon.Projection != null)
{
fs_lon.Reproject(wgs84);
}
for (int c = 0; c < ColumnCount; c++)
{
var fea = fs_lon.GetFeature(c).Geometry.Coordinate;
lonlat[0][c] = (float)fea.X;
}
IFeatureSet fs_lat = new FeatureSet(FeatureType.Point);
fs_lat.Projection = this.Projection;
for (int r = 0; r < RowCount; r++)
{
var vertice = LocateCentroid(1, r + 1);
Point pt = new Point(vertice);
fs_lat.AddFeature(pt);
}
if (fs_lat.Projection != null)
{
fs_lat.Reproject(wgs84);
}
for (int r = 0; r < RowCount; r++)
{
var fea = fs_lat.GetFeature(r).Geometry.Coordinate;
lonlat[1][r] = (float)fea.Y;
}
return(lonlat);
}
public static System.Data.Entity.Spatial.DbGeometry Project(System.Data.Entity.Spatial.DbGeometry source,
ProjectionInfo pStart, ProjectionInfo pEnd)
{
var wkt = source.WellKnownValue.WellKnownText;
var wktReader = new WKTReader();
var geometry = wktReader.Read(wkt);
var featureSet = new FeatureSet();
featureSet.Features.Add(geometry.ToDotSpatial());
featureSet.Projection = pStart;
featureSet.Reproject(pEnd);
var projected =
(featureSet.Features.First().BasicGeometry as IGeometry).ToGeoAPI();
var wktWriter = new WKTWriter();
var projectedWkt = wktWriter.Write(projected);
return(System.Data.Entity.Spatial.DbGeometry.FromText(projectedWkt));
}
public static List <IGeometry> Project(List <IGeometry> toList, ProjectionInfo pStart, ProjectionInfo pEnd)
{
var geometryCollection = new GeometryCollection(toList.ToArray());
var collection = geometryCollection.ToDotSpatial();
var featureSet = new FeatureSet();
foreach (var geo in collection.Geometries)
{
featureSet.Features.Add(geo);
}
featureSet.Projection = pStart;
featureSet.Reproject(pEnd);
var dotSpatialProjectedGeos =
featureSet.Features.Select(x => x.BasicGeometry as DotSpatial.Topology.IGeometry).ToList();
var result =
dotSpatialProjectedGeos.Select(
dotSpatialProjectedGeo => GeometryConverter.ToGeoAPI((dotSpatialProjectedGeo)))
.ToList();
return(result);
}
private void button2_Click(object sender, EventArgs e)
{
// Iterate through each properties of shapefiles
foreach (CropProperties property in _properties)
{
// Test if checked or not
foreach (ListViewItem item in listView1.CheckedItems)
{
if (item.Text.Contains(property.shp.Name))
{
// Get original shapefile and reproject to WGS84
Shapefile file = property.shp;
ProjectionInfo originalPrj = file.Projection;
ProjectionInfo WGS84 = ProjectionInfo.FromProj4String(KnownCoordinateSystems.Geographic.World.WGS1984.ToProj4String());
file.Reproject(WGS84);
// Create new shapefile & set projection
FeatureSet result = new FeatureSet(FeatureType.Polygon);
result.Projection = file.Projection;
// Set new extent
Extent extent = new Extent();
extent.SetValues(property.minCrop.Lng, property.minCrop.Lat, property.maxCrop.Lng, property.maxCrop.Lat);
// Copy feature data
result.CopyTableSchema(file);
foreach (Feature f in file.Features)
{
// Test to see if coord is within extent
Shape shp = f.ToShape();
IGeometry geom = shp.ToGeometry();
IList <Coordinate> coords = geom.Coordinates;
int hit = 0;
foreach (Coordinate coord in coords)
{
if (extent.Contains(coord))
{
hit++;
}
else
{
continue;
}
}
if (hit != 0)
{
// Iterate through coords in list
Polygon poly = new Polygon(coords);
result.AddFeature(poly).CopyAttributes(f);
}
else
{
continue;
}
}
// Project pts back to original and save
result.Reproject(originalPrj);
if (property.path.Contains(".shp"))
{
result.SaveAs(property.path, true);
}
else
{
result.SaveAs(property.path + ".shp", true);
}
}
}
}
this.Close();
}