CoreSpatial是基于.NET Standard v2.1实现的用以读写shapefile的类库，支持投影文件.prj的读写。
| 类库 | nuget |
|---|---|
| CoreSpatial |  |
| CoreSpatial.Converter |  |
- .NET Standard v2.1
- 支持shapefile的读写
- 使用ProjNet支持对.prj文件的读写
读:
IFeatureSet fs = FeatureSet.Open(shpPath);
...写：
fs.Save(shpPath);创建新的shapefile:
void CreatePoint()
{
IFeatureSet fs = new FeatureSet(FeatureType.Point);
var point1 = new GeoPoint(133, 30);
var point2 = new GeoPoint(133, 32);
var point3 = new GeoPoint(134, 30);
var feature1 = new Feature(new Geometry(point1));
var feature2 = new Feature(new Geometry(point2));
var feature3 = new Feature(new Geometry(point3));
fs.Features.Add(feature1);
fs.Features.Add(feature2);
fs.Features.Add(feature3);
fs.Crs = Crs.Wgs84Gcs;
var dataTable = new DataTable();
dataTable.Columns.Add("名称", typeof(string));
dataTable.Columns.Add("id", typeof(int));
var row1 = dataTable.NewRow();
var row2 = dataTable.NewRow();
var row3 = dataTable.NewRow();
row1[0] = "点1";
row1[1] = 1;
row2[0] = "点2";
row2[1] = 2;
row3[0] = "点3";
row3[1] = 3;
dataTable.Rows.Add(row1);
dataTable.Rows.Add(row2);
dataTable.Rows.Add(row3);
fs.AttrTable = dataTable;
fs.Save("../createNew/point.shp");
}
void CreateMultiPoint()
{
IFeatureSet fs = new FeatureSet(FeatureType.MultiPoint);
var point1 = new GeoPoint(133, 30);
var point2 = new GeoPoint(133, 32);
var point3 = new GeoPoint(134, 30);
var point4 = new GeoPoint(134, 34);
var point5 = new GeoPoint(135, 35);
var multiPoint1 = new MultiPoint(new List<GeoPoint>()
{
point1,point2,point3
});
var multiPoint2 = new MultiPoint();
multiPoint2.Points.Add(point4);
multiPoint2.Points.Add(point5);
var feature1 = new Feature(new Geometry(multiPoint1));
var feature2 = new Feature(new Geometry(multiPoint2));
fs.Features.Add(feature1);
fs.Features.Add(feature2);
fs.Crs = Crs.Wgs84Gcs;
var dataTable = new DataTable();
dataTable.Columns.Add("名称", typeof(string));
dataTable.Columns.Add("id", typeof(int));
var row1 = dataTable.NewRow();
var row2 = dataTable.NewRow();
row1[0] = "多点1";
row1[1] = 1;
row2[0] = "多点2";
row2[1] = 2;
dataTable.Rows.Add(row1);
dataTable.Rows.Add(row2);
fs.AttrTable = dataTable;
fs.Save("../createNew/multipoint.shp");
}
void CreatePolyLine()
{
IFeatureSet fs = new FeatureSet(FeatureType.PolyLine);
var point1 = new GeoPoint(133, 30);
var point2 = new GeoPoint(133, 32);
var point3 = new GeoPoint(134, 30);
var point4 = new GeoPoint(134, 34);
var point5 = new GeoPoint(135, 35);
//line ring
var polyLine1 = new PolyLine(new List<GeoPoint>()
{
point1,point2,point3,point1
});
var isLineRing = polyLine1.IsLineRing;
var polyLine2 = new PolyLine(new List<GeoPoint>()
{
point4,point5
});
var feature1 = new Feature(new Geometry(polyLine1));
var feature2 = new Feature(new Geometry(polyLine2));
fs.Features.Add(feature1);
fs.Features.Add(feature2);
fs.Crs = Crs.Wgs84Gcs;
var dataTable = new DataTable();
dataTable.Columns.Add("名称", typeof(string));
dataTable.Columns.Add("id", typeof(int));
var row1 = dataTable.NewRow();
var row2 = dataTable.NewRow();
row1[0] = "线1";
row1[1] = 1;
row2[0] = "线2";
row2[1] = 2;
dataTable.Rows.Add(row1);
dataTable.Rows.Add(row2);
fs.AttrTable = dataTable;
fs.Save("../createNew/polyline.shp");
}
void CreateMultiPolyLine()
{
IFeatureSet fs = new FeatureSet(FeatureType.PolyLine);
var point1 = new GeoPoint(132, 30);
var point2 = new GeoPoint(136, 30);
var point3 = new GeoPoint(134, 28);
var point4 = new GeoPoint(134, 32);
var polyLine1 = new PolyLine(new List<GeoPoint>()
{
point1,point2
});
var polyLine2 = new PolyLine(new List<GeoPoint>()
{
point3,point4
});
var multiPolyLine1 = new MultiPolyLine(new List<PolyLine>()
{
polyLine1,polyLine2
});
var feature1 = new Feature(new Geometry(multiPolyLine1));
fs.Features.Add(feature1);
fs.Crs = Crs.Wgs84Gcs;
var dataTable = new DataTable();
dataTable.Columns.Add("名称", typeof(string));
dataTable.Columns.Add("id", typeof(int));
var row1 = dataTable.NewRow();
row1[0] = "十字多线";
row1[1] = 1;
dataTable.Rows.Add(row1);
fs.AttrTable = dataTable;
fs.Save("../createNew/multiPolyLine.shp");
}
void CreatePolygon()
{
IFeatureSet fs = new FeatureSet(FeatureType.Polygon);
var point1 = new GeoPoint(132, 30);
var point2 = new GeoPoint(136, 30);
var point3 = new GeoPoint(132, 35);
var edge = new PolyLine(new List<GeoPoint>()
{
point1, point2, point3, point1
});
var polygon = new Polygon(edge);
//edge，Clockwise
var point4 = new GeoPoint(140, 30);
var point5 = new GeoPoint(140, 35);
var point6 = new GeoPoint(150, 35);
var point7 = new GeoPoint(150, 30);
var edge2 = new PolyLine(new List<GeoPoint>()
{
point4, point5, point6, point7, point4
});
//points sketch
// .(point9)
//
// .(point8) .(point10)
//
var point8 = new GeoPoint(142, 31);
var point9 = new GeoPoint(145, 33);
var point10 = new GeoPoint(148, 31);
//hole, need Counterclockwise,
//if Counterclockwise, sequence should be:
//point8, point10, point9
//It will be handled inside the library.
//It will be a line ring inside the library too
var hole = new PolyLine(new List<GeoPoint>()
{
point8,point9,point10
});
var polygon2 = new Polygon(edge2, hole);
var feature1 = new Feature(new Geometry(polygon));
var feature2 = new Feature(new Geometry(polygon2));
fs.Features.Set(new List<IFeature>()
{
feature1,
feature2
});
fs.Crs = Crs.Wgs84Gcs;
var dataTable = new DataTable();
dataTable.Columns.Add("名称", typeof(string));
dataTable.Columns.Add("id", typeof(int));
var row1 = dataTable.NewRow();
var row2 = dataTable.NewRow();
row1[0] = "简单面";
row1[1] = 1;
row2[0] = "带洞面";
row2[1] = 2;
dataTable.Rows.Add(row1);
dataTable.Rows.Add(row2);
fs.AttrTable = dataTable;
fs.Save("../createNew/polygon.shp");
}
//for using GB2312
Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
CreatePoint();
CreateMultiPoint();
CreatePolyLine();
CreateMultiPolyLine();
CreatePolygon();CoreSpatial参考于DotSpatial，部分用法类似，详见 CoreSpatial.Test。
转为GeoJSON（需要先引用 CoreSpatial.Converter）：
fs.ToGeoJSON();转为KML/KMZ（需要先引用 CoreSpatial.Converter）：
fs.ToKML(kmlName);
fs.ToKMZ(kmlName, KmzSavePath);使用方法见 CoreSpatial.Converter.Test，可在http://geojson.io/校验GeoJSON。
- 暂不能读取M值、Z值shp文件
zxyao145
有关许可条款的更多信息，请参阅LICENSE.txt。