第01章：SharpMap 概述与入门

using System;
using System.Drawing;
using SharpMap;
using SharpMap.Layers;
using SharpMap.Data.Providers;

class Program
{
    static void Main()
    {
        // 创建地图对象
        var map = new Map(new Size(800, 600));
        
        // 设置背景色
        map.BackColor = Color.White;
        
        Console.WriteLine($"SharpMap 版本验证成功！");
        Console.WriteLine($"地图大小: {map.Size.Width} x {map.Size.Height}");
        Console.WriteLine($"背景颜色: {map.BackColor}");
        Console.WriteLine($"图层数量: {map.Layers.Count}");
    }
}

using SharpMap;
using System.Drawing;

// 创建地图对象
var map = new Map(new Size(800, 600));

// 主要属性
map.BackColor = Color.LightBlue;      // 背景颜色
map.SRID = 4326;                       // 空间参考 ID
map.MinimumZoom = 0.1;                 // 最小缩放比例
map.MaximumZoom = 100000;              // 最大缩放比例

// 图层集合
map.Layers.Add(vectorLayer);           // 添加图层
map.BackgroundLayer.Add(tileLayer);    // 添加背景图层

// 渲染地图
Image mapImage = map.GetMap();

// 1. 矢量图层
var vectorLayer = new VectorLayer("States");
vectorLayer.DataSource = new ShapeFile("states.shp");

// 2. 标注图层
var labelLayer = new LabelLayer("State Labels");
labelLayer.DataSource = vectorLayer.DataSource;
labelLayer.LabelColumn = "STATE_NAME";

// 3. 瓦片图层（需要 BruTile 扩展）
var tileLayer = new TileLayer(tileSource, "OSM");

// 4. 栅格图层（需要 Extensions）
var rasterLayer = new GdalRasterLayer("Raster", "image.tif");

// Shapefile 提供者
var shpProvider = new ShapeFile("data.shp", true);

// PostGIS 提供者
var pgProvider = new PostGIS(connectionString, "tablename", "geom", "gid");

// OGR 提供者（支持多种格式）
var ogrProvider = new Ogr("data.geojson");

// WMS 提供者
var wmsProvider = new WmsClient("http://wms-service-url");

using SharpMap.Styles;
using System.Drawing;

// 矢量样式
var style = new VectorStyle
{
    Fill = new SolidBrush(Color.LightGreen),
    Outline = new Pen(Color.DarkGreen, 1),
    EnableOutline = true
};

// 线样式
var lineStyle = new VectorStyle
{
    Line = new Pen(Color.Blue, 2)
};

// 点样式
var pointStyle = new VectorStyle
{
    PointColor = Brushes.Red,
    PointSize = 10
};

// 应用样式到图层
vectorLayer.Style = style;

// 常用 SRID
// 4326 - WGS84 经纬度
// 3857 - Web Mercator
// 4490 - CGCS2000

// 设置地图坐标系
map.SRID = 4326;

// 设置坐标转换
var ctFactory = new ProjNet.CoordinateSystems.Transformations
    .CoordinateTransformationFactory();
var csFactory = new ProjNet.CoordinateSystems.CoordinateSystemFactory();

// 定义源和目标坐标系
var sourceCS = csFactory.CreateFromWkt(wgs84Wkt);
var targetCS = csFactory.CreateFromWkt(webMercatorWkt);

// 创建转换
var transform = ctFactory.CreateFromCoordinateSystems(sourceCS, targetCS);
vectorLayer.CoordinateTransformation = transform;

using System;
using System.Drawing;
using SharpMap;
using SharpMap.Layers;
using SharpMap.Data.Providers;
using SharpMap.Styles;

class Program
{
    static void Main()
    {
        // 1. 创建地图
        var map = new Map(new Size(800, 600));
        map.BackColor = Color.White;
        
        // 2. 创建矢量图层
        var layer = new VectorLayer("Countries");
        layer.DataSource = new ShapeFile("countries.shp", true);
        
        // 3. 设置样式
        layer.Style = new VectorStyle
        {
            Fill = new SolidBrush(Color.LightYellow),
            Outline = new Pen(Color.Black, 1),
            EnableOutline = true
        };
        
        // 4. 添加图层到地图
        map.Layers.Add(layer);
        
        // 5. 缩放到全图
        map.ZoomToExtents();
        
        // 6. 渲染并保存
        var image = map.GetMap();
        image.Save("output.png");
        
        Console.WriteLine("地图已保存到 output.png");
    }
}

using System.Drawing;
using SharpMap;
using SharpMap.Layers;
using SharpMap.Data.Providers;
using SharpMap.Styles;

// 创建地图
var map = new Map(new Size(1024, 768));
map.BackColor = Color.LightBlue;

// 添加面图层（底图）
var polygonLayer = new VectorLayer("Countries");
polygonLayer.DataSource = new ShapeFile("countries.shp", true);
polygonLayer.Style = new VectorStyle
{
    Fill = new SolidBrush(Color.FromArgb(200, 144, 238, 144)),
    Outline = new Pen(Color.DarkGreen, 1),
    EnableOutline = true
};

// 添加线图层（道路）
var lineLayer = new VectorLayer("Roads");
lineLayer.DataSource = new ShapeFile("roads.shp", true);
lineLayer.Style = new VectorStyle
{
    Line = new Pen(Color.Gray, 2)
};

// 添加点图层（城市）
var pointLayer = new VectorLayer("Cities");
pointLayer.DataSource = new ShapeFile("cities.shp", true);
pointLayer.Style = new VectorStyle
{
    PointColor = Brushes.Red,
    PointSize = 8
};

// 按顺序添加图层（先添加的在底部）
map.Layers.Add(polygonLayer);
map.Layers.Add(lineLayer);
map.Layers.Add(pointLayer);

// 缩放到全图并渲染
map.ZoomToExtents();
var image = map.GetMap();
image.Save("multi_layers.png");

using System.Drawing;
using SharpMap;
using SharpMap.Layers;
using SharpMap.Data.Providers;
using SharpMap.Styles;

var map = new Map(new Size(800, 600));

// 添加矢量图层
var vectorLayer = new VectorLayer("States");
vectorLayer.DataSource = new ShapeFile("states.shp", true);
vectorLayer.Style = new VectorStyle
{
    Fill = new SolidBrush(Color.LightGreen),
    Outline = new Pen(Color.DarkGreen, 1),
    EnableOutline = true
};

// 创建标注图层
var labelLayer = new LabelLayer("State Labels");
labelLayer.DataSource = vectorLayer.DataSource;
labelLayer.LabelColumn = "STATE_NAME";  // 标注字段
labelLayer.Style = new LabelStyle
{
    Font = new Font("Arial", 10, FontStyle.Bold),
    ForeColor = Color.Black,
    BackColor = new SolidBrush(Color.FromArgb(150, 255, 255, 255)),
    HorizontalAlignment = LabelStyle.HorizontalAlignmentEnum.Center,
    VerticalAlignment = LabelStyle.VerticalAlignmentEnum.Middle
};
labelLayer.Enabled = true;

// 添加图层
map.Layers.Add(vectorLayer);
map.Layers.Add(labelLayer);

map.ZoomToExtents();
var image = map.GetMap();
image.Save("labeled_map.png");

using System.Drawing;
using SharpMap;
using SharpMap.Layers;
using SharpMap.Data.Providers;
using SharpMap.Styles;
using SharpMap.Rendering.Thematics;

var map = new Map(new Size(800, 600));

// 创建矢量图层
var layer = new VectorLayer("States");
layer.DataSource = new ShapeFile("states.shp", true);

// 创建唯一值主题
var theme = new UniqueValuesTheme<string>("REGION", 
    new VectorStyle { Fill = new SolidBrush(Color.Gray) });

// 添加不同区域的样式
theme.AddStyle("Northeast", new VectorStyle 
{ 
    Fill = new SolidBrush(Color.LightBlue),
    Outline = new Pen(Color.Blue, 1),
    EnableOutline = true
});
theme.AddStyle("Southeast", new VectorStyle 
{ 
    Fill = new SolidBrush(Color.LightGreen),
    Outline = new Pen(Color.Green, 1),
    EnableOutline = true
});
theme.AddStyle("Midwest", new VectorStyle 
{ 
    Fill = new SolidBrush(Color.LightYellow),
    Outline = new Pen(Color.Orange, 1),
    EnableOutline = true
});
theme.AddStyle("West", new VectorStyle 
{ 
    Fill = new SolidBrush(Color.LightPink),
    Outline = new Pen(Color.Red, 1),
    EnableOutline = true
});

// 应用主题
layer.Theme = theme;

map.Layers.Add(layer);
map.ZoomToExtents();
var image = map.GetMap();
image.Save("themed_map.png");