Point

In GeoJSON, a Point is the simplest of the supported geometries, as it refers to a single point on a map - identified by it's x (longitude) and y (latitude) coordinates.

With this package, a Point is represented by the GeoJsonPoint class. It may be initialized as:

// Initialize a new point
GeoJsonPoint point = new GeoJsonPoint(9.536067, 55.708116);

The GeoJsonPoint class has a few different constructor overloads, so you may also use one of the following constructors instead:

With a third parameter for the altitude
The parameters are specified in the order of x, y and altitude:

// Initialize a new point
GeoJsonPoint point = new GeoJsonPoint(9.536067, 55.708116, 0);

Based on a double array
The array may have either two or three items depending on whether the altitude is specified. The first item is the x coordinate, the second item is the y coordinate, and the third item may be the optional altitude item.

// Initialize a new point
GeoJsonPoint point = new GeoJsonPoint(new []{ 9.536067, 55.708116 });

Based on an instance of IPoint
If you already have an instance of IPoint you can use that as the first parameter for the constructor:

// Initialize a new point
IPoint p = new Point(55.708116, 9.536067);

// Convert the IPoint to a GeoJsonPoint
GeoJsonPoint point = new GeoJsonPoint(p);

Converting

One of the main purposes of this package is being able to convert back and forth between different formats. As an example, the GeoJsonPoint.ToJson method lets you convert a Point to a JSON string:

// Initialize a new point
GeoJsonPoint point = new GeoJsonPoint(9.536067, 55.708116);

// Convert the point to a JSON string
string json = point.ToJson(Formatting.Indented);

With the example point above, the generated JSON would look like:

{
  "type": "Point",
  "coordinates": [
    9.536067,
    55.708116
  ]
}

Or if you need to save the JSON to a file on your disk instead, there is also the GeoJsonPoint.Save method:

// Initialize a new point
GeoJsonPoint point = new GeoJsonPoint(9.536067, 55.708116);

// Save the JSON to disk
point.Save("C:/MyPoint.json", Formatting.Indented);

The parameters are path and formatting respectively. The latter is used to specify the formatting of the JSON - it is optional, so if not specified, Formatting.Indented is assumed.

To go the other way around, you can use the static GeoJsonPoint.Parse and GeoJsonPoint.Load methods to parse/load a JSON string into an instance of GeoJsonPoint:

// Parse a raw JSON string into a new instance
GeoJsonPoint point = GeoJsonPoint.Parse("{\"type\":\"Point\",\"coordinates\":[9.536067,55.708116]}");

// Load the raw JSON string form the disk
GeoJsonPoint point = GeoJsonPoint.Load("C:/MyPoint.json");

Finally, you can also convert a GeoJsonPoint into an instance of IPoint:

// Initialize a new point
GeoJsonPoint point = new GeoJsonPoint(9.536067, 55.708116);

// Convert "point" to an instance of IPoint
IPoint p = point.ToPoint();