DuckDb.Spatial.IO.Net

This library provides a seamless way to convert geometries between DuckDB's internal geometry format and NetTopologySuite (NTS) geometries in C#. It supports reading and writing geometries from/to byte arrays and streams, making it easy to integrate with DuckDB databases and work with spatial data in .NET applications.

Installation

You can install the library via NuGet:

dotnet add package DuckDb.Spatial.IO.Net

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Usage

Below are examples demonstrating how to use the library for common operations: reading from and writing to byte arrays and streams.

1. Reading Geometry from a Byte Array

To convert a DuckDB geometry stored as a byte array into an NTS geometry:

using DuckDb.Spatial.IO.Net;

...

var reader = new GeometryReader();
var geometry = reader.Read(bytes);

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2. Reading Geometry from a Stream

If your DuckDB geometry is stored in a stream, you can read it directly:

using DuckDb.Spatial.IO.Net;

...

var reader = new GeometryReader();
var geometry = reader.Read(stream);

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3. Writing Geometry to a Byte Array

To convert an NTS geometry into a DuckDB-compatible byte array:

using DuckDb.Spatial.IO.Net;

...

var writer = new GeometryWriter();
var bytes = writer.Write(geometry);

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4. Writing Geometry to a Stream

If you need to write an NTS geometry to a stream in DuckDB-compatible format:

using DuckDb.Spatial.IO.Net;

...

var writer = new GeometryWriter();
writer.Write(geometry, stream);

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Supported Geometry Types

The library supports all geometry types compatible with both DuckDB and NetTopologySuite, including:

• Point
• LineString
• Polygon
• MultiPoint
• MultiLineString
• MultiPolygon
• GeometryCollection

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Contributing

Contributions are welcome! If you find any issues or have suggestions for improvements, please open an issue or submit a pull request.

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License

This project is licensed under the MIT License. See the LICENSE file for details.