GEOJSON to Topojson Conversion in .NET: Sample Guide

geojson_topojson_conversion_net_geojson_topojson_conversion.cs

// GEOJSON to Topojson Conversion in .NET: Sample Guide
// Read the full guide here: https://blog.aspose.com/gis/geojson-to-topojson-conversion-in-dotnet-sample-guide/

using System;
using System.Threading.Tasks;
using Aspose.GIS;
using Aspose.GIS.Geometries;
using Aspose.GIS.IO;
using Aspose.GIS.IO.GeoJson;
using Aspose.GIS.IO.TopoJson;

class Program
{
    static async Task Main(string[] args)
    {
        // Input and output file paths
        string inputPath = @"C:\Data\sample.geojson";
        string outputPath = @"C:\Data\sample.topojson";

        // Initialize reader and writer
        var geoJsonReader = new GeoJsonReader(inputPath);
        var topoJsonWriter = new TopoJsonWriter(outputPath)
        {
            // Quantization reduces file size while preserving topology
            Quantization = 1e5,
            // Preserve feature IDs if needed
            PreserveFeatureIds = true
        };

        // Asynchronously read GEOJSON and write TopoJSON
        var geometryCollection = await geoJsonReader.ReadAsync();
        await topoJsonWriter.WriteAsync(geometryCollection);

        Console.WriteLine("Conversion completed successfully.");
    }
}