ShapefileSample.cs :  » GIS » SharpMap » WinFormSamples » Samples » C# / CSharp Open Source

using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Text;
using SharpMap;
using SharpMap.Data.Providers;
using SharpMap.Layers;
using SharpMap.Rendering;
using SharpMap.Styles;
using PointSharpMap.Geometries.Point;

namespace WinFormSamples.Samples{
    public static class ShapefileSample
    {
        public static Map InitializeMap()
        {
            //Initialize a new map of size 'imagesize'
            Map map = new Map();

            //Set up the countries layer
            VectorLayer layCountries = new VectorLayer("Countries");
            //Set the datasource to a shapefile in the App_data folder
            layCountries.DataSource = new ShapeFile("GeoData/World/countries.shp", true);
            //Set fill-style to green
            layCountries.Style.Fill = new SolidBrush(Color.Green);
            //Set the polygons to have a black outline
            layCountries.Style.Outline = Pens.Black;
            layCountries.Style.EnableOutline = true;
            layCountries.SRID = 4326;

            //Set up a river layer
            VectorLayer layRivers = new VectorLayer("Rivers");
            //Set the datasource to a shapefile in the App_data folder
            layRivers.DataSource = new ShapeFile("GeoData/World/rivers.shp", true);
            //Define a blue 1px wide pen
            layRivers.Style.Line = new Pen(Color.Blue, 1);
            layRivers.SRID = 4326;

            //Set up a cities layer
            VectorLayer layCities = new VectorLayer("Cities");
            //Set the datasource to a shapefile in the App_data folder
            layCities.DataSource = new ShapeFile("GeoData/World/cities.shp", true);
            layCities.Style.SymbolScale = 0.8f;
            layCities.MaxVisible = 40;
            layCities.SRID = 4326;

            //Set up a country label layer
            LabelLayer layLabel = new LabelLayer("Country labels");
            layLabel.DataSource = layCountries.DataSource;
            layLabel.Enabled = true;
            layLabel.LabelColumn = "Name";
            layLabel.Style = new LabelStyle();
            layLabel.Style.ForeColor = Color.White;
            layLabel.Style.Font = new Font(FontFamily.GenericSerif, 12);
            layLabel.Style.BackColor = new SolidBrush(Color.FromArgb(128, 255, 0, 0));
            layLabel.MaxVisible = 90;
            layLabel.MinVisible = 30;
            layLabel.Style.HorizontalAlignment = LabelStyle.HorizontalAlignmentEnum.Center;
            layLabel.SRID = 4326;
            layLabel.MultipartGeometryBehaviour = LabelLayer.MultipartGeometryBehaviourEnum.Largest;

            //Set up a city label layer
            LabelLayer layCityLabel = new LabelLayer("City labels");
            layCityLabel.DataSource = layCities.DataSource;
            layCityLabel.Enabled = true;
            layCityLabel.LabelColumn = "Name";
            layCityLabel.Style = new LabelStyle();
            layCityLabel.Style.ForeColor = Color.Black;
            layCityLabel.Style.Font = new Font(FontFamily.GenericSerif, 11);
            layCityLabel.MaxVisible = layLabel.MinVisible;
            layCityLabel.Style.HorizontalAlignment = LabelStyle.HorizontalAlignmentEnum.Left;
            layCityLabel.Style.VerticalAlignment = LabelStyle.VerticalAlignmentEnum.Bottom;
            layCityLabel.Style.Offset = new PointF(3, 3);
            layCityLabel.Style.Halo = new Pen(Color.Yellow, 2);
            layCityLabel.TextRenderingHint = TextRenderingHint.AntiAlias;
            layCityLabel.SmoothingMode = SmoothingMode.AntiAlias;
            layCityLabel.SRID = 4326;
            layCityLabel.LabelFilter = LabelCollisionDetection.ThoroughCollisionDetection;
            layCityLabel.Style.CollisionDetection = true;

            //Add the layers to the map object.
            //The order we add them in are the order they are drawn, so we add the rivers last to put them on top
            map.Layers.Add(layCountries);
            map.Layers.Add(layRivers);
            map.Layers.Add(layCities);
            map.Layers.Add(layLabel);
            map.Layers.Add(layCityLabel);


            //limit the zoom to 360 degrees width
            map.MaximumZoom = 360;
            map.BackColor = Color.LightBlue;

            map.Zoom = 360;
            map.Center = new Point(0, 0);

            return map;
        }
    }
}