Regional service coverage

Create a console project, add the ChartForgeX package, and replace Program.cs with this source. Run it to write SVG, PNG and HTML with the default system fonts.

For the same typography as the gallery, download the gallery-font recipe and copy the gallery’s fonts directory beside your program.

using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using ChartForgeX.Core;
using ChartForgeX.Primitives;
using ChartForgeX.Rendering;
using ChartForgeX.Themes;
using ChartForgeX.Topology;
using ChartForgeX.Typography;
using ChartForgeX.VisualArtifacts;
using ChartForgeX.VisualBlocks;

var mode = VisualThemeMode.Light;
var theme = VisualTheme.Graphite();
var model = RegionMapRecipe.Create("wide", mode);
var context = new VisualRenderContext(
    new VisualLayoutOptions(new VisualSize(800, 440)), theme, mode,
    new VisualFrame("Regional service coverage", "Explore the data, then download the chart", showLegend: null, showSurface: false));
var prepared = model.Prepare(context);
File.WriteAllText("visual.svg", prepared.ToSvg());
File.WriteAllBytes("visual.png", prepared.ToPng());
File.WriteAllText("visual.html", prepared.ToArtifact("example", VisualArtifactKind.Chart).ToHtmlPage());

/// <summary>Creates a geographic map of regional service coverage.</summary>
public static class RegionMapRecipe {
    /// <summary>Creates the source model for a gallery variant without choosing an export backend.</summary>
    public static Chart Create(string variant = "wide", VisualThemeMode mode = VisualThemeMode.Light) {
        if (variant is not ("wide" or "compact" or "sparse" or "options" or "compact-options"))
            throw new ArgumentOutOfRangeException(nameof(variant));

        var chart = Chart.Create().AddRegionMap("Observations", ChartMapCatalog.Get("us-states"), RegionValues(),
            id: new ChartSeriesId("regional-observations")).WithMapLabels(false);
        if (variant == "options") {
            var colors = VisualTheme.Graphite().Resolve(mode);
            chart.WithMapColorScale(ChartColorScale.Diverging(colors.Status.Critical.Fill, colors.Surface, colors.Status.Pass.Fill, 50)
                    .WithValueRange(0, 100).WithLabels("Below target", "Target", "Above target").WithNoDataColor(colors.Border))
                .WithMapScaleLegendPosition(ChartMapScaleLegendPosition.Right);
        }
        return chart.WithValueFormat(ChartValueFormat.Number("0.##", System.Globalization.CultureInfo.InvariantCulture));
    }

    private static ChartRegionMapItem[] RegionValues() => new[] {
        new ChartRegionMapItem("CA", 82), new ChartRegionMapItem("TX", 64),
        new ChartRegionMapItem("NY", 91), new ChartRegionMapItem("FL", 47),
        new ChartRegionMapItem("WA", 74), new ChartRegionMapItem("IL", 58),
        new ChartRegionMapItem("CO", 39), new ChartRegionMapItem("NC", 66)
    };
}

using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using ChartForgeX.Core;
using ChartForgeX.Primitives;
using ChartForgeX.Rendering;
using ChartForgeX.Themes;
using ChartForgeX.Topology;
using ChartForgeX.Typography;
using ChartForgeX.VisualArtifacts;
using ChartForgeX.VisualBlocks;

var mode = VisualThemeMode.Dark;
var theme = VisualTheme.Graphite();
var model = RegionMapRecipe.Create("wide", mode);
var context = new VisualRenderContext(
    new VisualLayoutOptions(new VisualSize(800, 440)), theme, mode,
    new VisualFrame("Regional service coverage", "Explore the data, then download the chart", showLegend: null, showSurface: false));
var prepared = model.Prepare(context);
File.WriteAllText("visual.svg", prepared.ToSvg());
File.WriteAllBytes("visual.png", prepared.ToPng());
File.WriteAllText("visual.html", prepared.ToArtifact("example", VisualArtifactKind.Chart).ToHtmlPage());

/// <summary>Creates a geographic map of regional service coverage.</summary>
public static class RegionMapRecipe {
    /// <summary>Creates the source model for a gallery variant without choosing an export backend.</summary>
    public static Chart Create(string variant = "wide", VisualThemeMode mode = VisualThemeMode.Light) {
        if (variant is not ("wide" or "compact" or "sparse" or "options" or "compact-options"))
            throw new ArgumentOutOfRangeException(nameof(variant));

        var chart = Chart.Create().AddRegionMap("Observations", ChartMapCatalog.Get("us-states"), RegionValues(),
            id: new ChartSeriesId("regional-observations")).WithMapLabels(false);
        if (variant == "options") {
            var colors = VisualTheme.Graphite().Resolve(mode);
            chart.WithMapColorScale(ChartColorScale.Diverging(colors.Status.Critical.Fill, colors.Surface, colors.Status.Pass.Fill, 50)
                    .WithValueRange(0, 100).WithLabels("Below target", "Target", "Above target").WithNoDataColor(colors.Border))
                .WithMapScaleLegendPosition(ChartMapScaleLegendPosition.Right);
        }
        return chart.WithValueFormat(ChartValueFormat.Number("0.##", System.Globalization.CultureInfo.InvariantCulture));
    }

    private static ChartRegionMapItem[] RegionValues() => new[] {
        new ChartRegionMapItem("CA", 82), new ChartRegionMapItem("TX", 64),
        new ChartRegionMapItem("NY", 91), new ChartRegionMapItem("FL", 47),
        new ChartRegionMapItem("WA", 74), new ChartRegionMapItem("IL", 58),
        new ChartRegionMapItem("CO", 39), new ChartRegionMapItem("NC", 66)
    };
}