最近偶然在網(wǎng)上搜索,，發(fā)現(xiàn)了sharpMap這個開源GIS,，其實網(wǎng)上關(guān)于sharpMap的一些講解還是比較多的,，比如GeoWeb開源社區(qū)（http://www./showforum-6.aspx）,，有專門的空間對sharpMap進(jìn)行大量的分析,，本人最近幾天也看了一些關(guān)于sharpMap的資料,，發(fā)現(xiàn)看得多了,，對其也產(chǎn)生了比較濃厚的興趣,，自己在GIS方面的知識也有了很大的提高,，不僅僅是書上純粹的理論,，通過對SharpMap這個開源GIS的學(xué)習(xí),，對以往學(xué)到的理論知識是很好的升華,，也學(xué)會了更多的實際運用。

學(xué)習(xí)一種東西,，往往是從初步的使用開始的,，這樣才能給人以直觀的印象，對于sharpMap的學(xué)習(xí)和分析,，也是一樣的,。呵呵！下面是我用sharpMap寫的一個地圖顯示的小例子,。先發(fā)效果圖：

  

此地圖是根據(jù)行政區(qū)域代碼作的專題圖,，這樣比一種顏色渲染要好看寫
以下是源代碼：

public partial class szwebgis : System.Web.UI.Page
{
    private SharpMap.Map szmap = null;
    protected void Page_Load(object sender, EventArgs e)
    {
        szmap = this.Init_map(new Size((int)this.mapImage.Width.Value , (int)this.mapImage.Height.Value ));
        if (IsPostBack)
        {
            szmap.Center = Session["mapCenter"] as SharpMap.Geometries.Point;
            szmap.Zoom = (double)Session["mapZoom"];
        }
        else
        {
            this.GenerateMap();
        }
    }
    private void GenerateMap()
    {
        //記錄地圖的中心和放大系數(shù)
        Session.Add("mapCenter", szmap.Center);
        Session.Add("mapZoom", szmap.Zoom);
        System.Drawing.Image img = szmap.GetMap();
        string imgId = SharpMap.Web.Caching.InsertIntoCache(3, img);
        this.mapImage.ImageUrl = "GetMap.aspx?ID=" + HttpUtility.UrlEncode(imgId);
    }
    private SharpMap.Map Init_map(Size mapsize)
    {
        SharpMap.Map map = new SharpMap.Map(mapsize);
        //添加區(qū)域圖層
        SharpMap.Layers.VectorLayer areaLyr = new SharpMap.Layers.VectorLayer("深圳區(qū)域");
        areaLyr.DataSource = new SharpMap.Data.Providers.ShapeFile(Context.Server.MapPath(@"App_Data\SZ\深圳區(qū)域shp.shp"), true);
        //areaLyr.Style.Fill=new SolidBrush(Color.HotPink);
        //areaLyr.Style.Outline=new Pen(Color.Black);
        //areaLyr.Style.EnableOutline = true;
        SharpMap.Styles.VectorStyle firstStyle=new SharpMap.Styles.VectorStyle();
        SharpMap.Styles.VectorStyle lastStyle=new SharpMap.Styles.VectorStyle();
        firstStyle.Outline = new Pen(Color.Black);
        firstStyle.EnableOutline = true;
        lastStyle.Outline = new Pen(Color.Black);
        lastStyle.EnableOutline = true;
        SharpMap.Rendering.Thematics.GradientTheme itheme=new SharpMap.Rendering.Thematics.GradientTheme("CLASSID",0,44,firstStyle ,lastStyle );
        itheme.FillColorBlend =SharpMap.Rendering.Thematics.ColorBlend.ThreeColors(Color.Yellow, Color.SkyBlue, Color.HotPink);
        areaLyr.Theme = itheme;
        areaLyr.SRID = 4326;
        //添加區(qū)域label層
        SharpMap.Layers.LabelLayer nameLyr = new SharpMap.Layers.LabelLayer("深圳區(qū)域名稱");
        nameLyr.DataSource = areaLyr.DataSource;
        nameLyr.LabelColumn = "Name";
        nameLyr.Style.Font = new Font(FontFamily.GenericSerif, 10);
        nameLyr.Style.ForeColor = Color.Black;
        nameLyr.Enabled = true;
        nameLyr.MaxVisible = 0.5;
        nameLyr.Style.HorizontalAlignment = SharpMap.Styles.LabelStyle.HorizontalAlignmentEnum.Center;
        nameLyr.MultipartGeometryBehaviour = SharpMap.Layers.LabelLayer.MultipartGeometryBehaviourEnum.All;
        nameLyr.SRID = 4326;

        map.Layers.Add(areaLyr);
        map.Layers.Add(nameLyr);
        //設(shè)置地圖中心
        map.Center = new SharpMap.Geometries.Point(114.18, 22.63);
        map.Zoom = 1;
        return map;
    }
    protected void mapImage_Click(object sender, ImageClickEventArgs e)
    {
        //把鼠標(biāo)點擊的地方設(shè)置為地圖中心
        SharpMap.Geometries.Point pt_center = null;
        pt_center=szmap.ImageToWorld(new PointF((float )e.X,(float )e.Y));
        szmap.Center=pt_center;
        if (this.RadioButtonList1.Items[0].Selected)  //放大
        {
            szmap.Zoom = szmap.Zoom * 0.5;
        }
        else if (this.RadioButtonList1.Items[1].Selected)  //縮小
        {
            szmap.Zoom = szmap.Zoom * 2;
        }
        //重新生成地圖
        this.GenerateMap();
    }
}
////////////////////////////////////////

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="szwebgis.aspx.cs" Inherits="szwebgis" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www./TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www./1999/xhtml" >
<head runat="server">
    <title>無標(biāo)題頁</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <table style="z-index: 100; left: 165px; position: absolute; top: 40px; font-family:Verdana; font-size:10pt; width: 506px;">
            <tr>
                <td style="width: 91px; height: 24px;">
                    <asp:RadioButtonList ID="RadioButtonList1" runat="server" RepeatDirection="Horizontal"
                        Style="z-index: 100; left: 0px; position: absolute; top: 0px" Width="236px">
                        <asp:ListItem>放大</asp:ListItem>
                        <asp:ListItem>縮小</asp:ListItem>
                        <asp:ListItem>平移</asp:ListItem>
                    </asp:RadioButtonList>
                </td>
            </tr>
            <tr>
                <td style="width: 91px; height: 273px;">
                    <asp:ImageButton ID="mapImage" runat="server" Style="z-index: 100; left: 7px;
                        position: absolute; top: 37px" Height="264px" Width="492px" OnClick="mapImage_Click" />
                </td>
            </tr>
        </table>
   
    </div>
    </form>
</body>
</html>

原文鏈接：https://www.cnblogs.com/moonvan/archive/2011/06/22/2087130.html