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using System;

using System.Linq;

using System.Reflection;

namespace WinFormSamples.Samples

{

public static class GdalSample

{

private static int _num;

private static string _gdalSampleDataset;

public static string GdalSampleDataSet

{

get { return _gdalSampleDataset; }

}

public static SharpMap.Map InitializeMap(float angle)

{

_num %= 9;

int num = _num;

_num++;

switch (num)

{

case 0:

case 1:

case 2:

case 3:

return InitializeGeoTiff(num, angle);

default:

return InitializeVRT(num, angle);

}

}

private static SharpMap.Map InitializeGeoTiff(int index, float angle)

{

try

{

//Sample provided by Dan Brecht and Joel Wilson

var map = new SharpMap.Map();

map.BackColor = System.Drawing.Color.White;

const string relativePath = "GeoData/GeoTiff/";

SharpMap.Layers.GdalRasterLayer layer;

switch (index)

{

case 0:

layer = new SharpMap.Layers.GdalRasterLayer("GeoTiff", relativePath + "utm.tif");

map.Layers.Add(layer);

break;

case 1:

layer = new SharpMap.Layers.GdalRasterLayer("GeoTiff", relativePath + "utm.jp2");

map.Layers.Add(layer);

break;

case 2:

layer = new SharpMap.Layers.GdalRasterLayer("GeoTiff", relativePath + "world_raster_mod.tif");

map.Layers.Add(layer);

break;

default:

if (!System.IO.File.Exists(relativePath + "format01-image_a.tif"))

{

throw new System.Exception("Make sure the data is in the relative directory: " + relativePath);

}

layer = new SharpMap.Layers.GdalRasterLayer("GeoTiffA", relativePath + "format01-image_a.tif");

map.Layers.Add(layer);

layer = new SharpMap.Layers.GdalRasterLayer("GeoTiffB", relativePath + "format01-image_b.tif");

map.Layers.Add(layer);

layer = new SharpMap.Layers.GdalRasterLayer("GeoTiffC", relativePath + "format01-image_c.tif");

map.Layers.Add(layer);

layer = new SharpMap.Layers.GdalRasterLayer("GeoTiffD", relativePath + "format01-image_d.tif");

map.Layers.Add(layer);

SharpMap.Layers.VectorLayer shapeLayer;

if (!System.IO.File.Exists(relativePath + "outline.shp"))

{

throw new System.Exception("Make sure the data is in the relative directory: " + relativePath);

}

shapeLayer = new SharpMap.Layers.VectorLayer("outline", new SharpMap.Data.Providers.ShapeFile(relativePath + "outline.shp"));

shapeLayer.Style.Fill = System.Drawing.Brushes.Transparent;

shapeLayer.Style.Outline = System.Drawing.Pens.Black;

shapeLayer.Style.EnableOutline = true;

shapeLayer.Style.Enabled = true;

map.Layers.Add(shapeLayer);

break;

}

//if (layer != null)

// layer.UseRotation = true;

map.ZoomToExtents();

System.Drawing.Drawing2D.Matrix mat = new System.Drawing.Drawing2D.Matrix();

mat.RotateAt(angle, map.WorldToImage(map.Center));

map.MapTransform = mat;

_gdalSampleDataset = "GeoTiff" + _num;

return map;

}

catch (System.TypeInitializationException ex)

{

if (ex.Message == "The type initializer for 'OSGeo.GDAL.GdalPINVOKE' threw an exception.")

{

var asm = Assembly.GetAssembly(typeof(OSGeo.GDAL.Gdal)).GetName();

throw new System.Exception(

string.Format(

"The application threw a PINVOKE exception. You probably need to copy the unmanaged dll's to your bin directory. " +

"They are a part of the GDAL NuGet package v{0}.",

asm.Version.ToString(3)));

}

throw;

}

}

private static readonly string[] Vrts =

{

@"..\DEM\Golden_CO.dem",

"contours_sample_polyline_play_polyline.asc",

"contours_sample_polyline_play1_polyline.vrt",

"contours_sample_polyline_play2_polyline.vrt",

"contours_sample_polyline_play3_polyline.vrt"

};

private const string RelativePath = "GeoData/VRT/";

private static SharpMap.Map InitializeVRT(int index, float angle)

{

SharpMap.Map map = new SharpMap.Map();

int ind = index - 4;

if (ind >= Vrts.Length) ind = 0;

if (!System.IO.File.Exists(RelativePath + Vrts[ind]))

{

throw new System.Exception("Make sure the data is in the relative directory: " + RelativePath);

}

SharpMap.Layers.GdalRasterLayer layer = new SharpMap.Layers.GdalRasterLayer("VirtualRasterTable", RelativePath + Vrts[ind]);

var ext = System.IO.Path.GetExtension(layer.Filename);

map.Layers.Add(layer);

_gdalSampleDataset = string.Format("'{0}'", ext != null ? ext.ToUpper() : string.Empty);

map.ZoomToExtents();

System.Drawing.Drawing2D.Matrix mat = new System.Drawing.Drawing2D.Matrix();

mat.RotateAt(angle, map.WorldToImage(map.Center));

map.MapTransform = mat;

return map;

}

public static SharpMap.Map InitializeMap(int angle, string[] filenames)

{

if (filenames == null || filenames.Length == 0) return null;

var map = new SharpMap.Map();

for (int i = 0; i < filenames.Length; i++)

{

if (filenames[i].StartsWith("PG:"))

{

SharpMap.Layers.ILayer lyr = null;

try

{

lyr = new SharpMap.Layers.GdalRasterLayer($"PG_RASTER{i}", filenames[i]);

}

catch (Exception)

{

return null;

}

map.Layers.Add(lyr);

}

else

map.Layers.Add(new SharpMap.Layers.GdalRasterLayer(System.IO.Path.GetFileName(filenames[i]), filenames[i]));

}

var mat = new System.Drawing.Drawing2D.Matrix();

mat.RotateAt(angle, map.WorldToImage(map.Center));

map.MapTransform = mat;

map.ZoomToExtents();

return map;

}

}

}