https://github.com/zxyao145/corespatial

Based on .Net Standard v2.1, for reading and writing esri shapefile files. 基于.Net Standard v2.1, 用于shapefile文件读写。
https://github.com/zxyao145/corespatial

csharp dotnet-core dotnet-library dotnet-standard gis shapefile

Last synced: 5 months ago
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Based on .Net Standard v2.1, for reading and writing esri shapefile files. 基于.Net Standard v2.1, 用于shapefile文件读写。

Host: GitHub
URL: https://github.com/zxyao145/corespatial
Owner: zxyao145
License: mit
Created: 2020-03-25T14:56:17.000Z (over 5 years ago)
Default Branch: master
Last Pushed: 2021-04-02T06:57:48.000Z (over 4 years ago)
Last Synced: 2025-03-31T21:28:09.602Z (6 months ago)
Topics: csharp, dotnet-core, dotnet-library, dotnet-standard, gis, shapefile
Language: C#
Homepage:
Size: 1.29 MB
Stars: 6
Watchers: 1
Forks: 4
Open Issues: 2
Metadata Files:
- Readme: README-en.md
- License: LICENSE

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README

          # CoreSpatial

[中文](./README.md)

### Purpose

CoreSpatial is a class library based on .Net Standard v2.1 to read and write shapefiles. It supports the reading and writing of projection file .prj (support by ProjNet).

### nuget

|  Library   | nuget  |

|  ----  | ----  |

| CoreSpatial | [![NuGet Status](https://img.shields.io/nuget/v/CoreSpatial)](https://www.nuget.org/packages/CoreSpatial) |

| CoreSpatial.Converter | [![NuGet Status](https://img.shields.io/nuget/v/CoreSpatial.Converter?style=plastic)](https://www.nuget.org/packages/CoreSpatial.Converter) |

### Project information

+ .NET Standard v2.1

+ Supports the reading and writing of shapefile

+ Using **ProjNet** to support reading and writing .prj files

### Usage

read:

```c#

IFeatureSet fs = FeatureSet.Open(shpPath);

...

```

write:

```c#

fs.Save(shpPath);

```

create new shapefile:

```c#

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()

	{

		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()

	{

		point1,point2,point3,point1

	});

	var isLineRing = polyLine1.IsLineRing;

	var polyLine2 = new PolyLine(new List()

	{

		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()

	{

		point1,point2

	});

	var polyLine2 = new PolyLine(new List()

	{

		point3,point4

	});

	var multiPolyLine1 = new MultiPolyLine(new List()

	{

		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()

	{

		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()

	{

		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()

	{

		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()

	{

		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 refers to **DotSpatial**. Some of its usage is similar. See CoreSpatial.Test for details.

Convert to GeoJSON (You need to add reference **CoreSpatial.Converter** first):

```c#

fs.ToGeoJSON();

```

Convert to KML/KMZ (You need to add reference **CoreSpatial.Converter** first):

```c#

fs.ToKML(kmlName);

fs.ToKMZ(kmlName, KmzSavePath);

```

See CoreSpatial.Converter.Test for usage, Geojson can be verified at http://geojson.io/.

### Attention

+ Cannot read SHP file of M value and Z value

### Reference 

[DotSpatial](https://github.com/DotSpatial/DotSpatial "DotSpatial")

[NetTopologySuite.IO.ShapeFile](https://github.com/NetTopologySuite/NetTopologySuite.IO.ShapeFile "NetTopologySuite.IO.ShapeFile")

### Developer

zxyao145

### License

See LICENSE.txt

ecosyste.ms

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https://github.com/zxyao145/corespatial

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README