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/******************************************************************************
* $Id: OGRLayerAlg.cs 27014 2014-03-06 20:06:32Z tamas $
*
* Name: OGRLayerAlg.cs
* Project: GDAL CSharp Interface
* Purpose: A sample app to demonstrate the usage of the RFC-39 functions.
* Author: Tamas Szekeres, szekerest@gmail.com
*
******************************************************************************
* Copyright (c) 2013, Tamas Szekeres
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*****************************************************************************/
using System;
using OSGeo.OGR;
/**
* <p>Title: OGR C# OGRLayerAlg example.</p>
* <p>Description: A sample app to demonstrate the usage of the RFC-39 functions.</p>
* @author Tamas Szekeres (szekerest@gmail.com)
* @version 1.0
*/
/// <summary>
/// A sample app to demonstrate the usage of the RFC-39 functions.
/// </summary>
class OGRLayerAlg {
public static void usage()
{
Console.WriteLine("usage: ogrlayeralg {function} {Data Source 1} {layer1} {Data Source 2} {layer2} {Result Data Source Name} {Result Layer Name} [{Options}]");
Console.WriteLine("example: ogrlayeralg Union data1.shp layer1 data.shp layer2 result.shp resultlayer SKIP_FAILURES=YES");
System.Environment.Exit(-1);
}
public static void Main(string[] args)
{
if (args.Length <= 6) usage();
Console.WriteLine("");
try
{
/* -------------------------------------------------------------------- */
/* Register driver(s). */
/* -------------------------------------------------------------------- */
Ogr.RegisterAll();
/* -------------------------------------------------------------------- */
/* Open data source. */
/* -------------------------------------------------------------------- */
DataSource ds1 = Ogr.Open(args[1], 0);
if (ds1 == null)
{
Console.WriteLine("Can't open " + args[1]);
System.Environment.Exit(-1);
}
Layer layer1 = ds1.GetLayerByName(args[2]);
if (layer1 == null)
{
Console.WriteLine("FAILURE: Couldn't fetch layer " + args[2]);
System.Environment.Exit(-1);
}
DataSource ds2 = Ogr.Open(args[3], 0);
if (ds2 == null)
{
Console.WriteLine("Can't open " + args[3]);
System.Environment.Exit(-1);
}
Layer layer2 = ds2.GetLayerByName(args[4]);
if (layer2 == null)
{
Console.WriteLine("FAILURE: Couldn't fetch layer " + args[4]);
System.Environment.Exit(-1);
}
/* -------------------------------------------------------------------- */
/* Get driver for creating the result ds */
/* -------------------------------------------------------------------- */
Driver drv = Ogr.GetDriverByName("ESRI Shapefile");
if (drv == null)
{
Console.WriteLine("Can't get driver.");
System.Environment.Exit(-1);
}
/* -------------------------------------------------------------------- */
/* Creating the datasource */
/* -------------------------------------------------------------------- */
DataSource ds = drv.CreateDataSource( args[5], new string[] {} );
if (drv == null)
{
Console.WriteLine("Can't create the datasource.");
System.Environment.Exit(-1);
}
/* -------------------------------------------------------------------- */
/* Process options */
/* -------------------------------------------------------------------- */
string[] options = null;
if (args.Length > 7)
{
options = new string[args.Length - 7];
Array.Copy(args, 7, options, 0, args.Length - 7);
}
/* -------------------------------------------------------------------- */
/* Creating the layer */
/* -------------------------------------------------------------------- */
Layer layer;
int i;
for(i=0;i<ds.GetLayerCount();i++)
{
layer = ds.GetLayerByIndex( i );
if( layer != null && layer.GetLayerDefn().GetName() == args[6])
{
Console.WriteLine("Layer already existed. Recreating it.\n");
ds.DeleteLayer(i);
break;
}
}
layer = ds.CreateLayer(args[6], null, layer1.GetLayerDefn().GetGeomType(), new string[] { });
if( layer == null )
{
Console.WriteLine("Layer creation failed.");
System.Environment.Exit(-1);
}
switch(args[0])
{
case "Intersection":
layer1.Intersection(layer2, layer, options, new Ogr.GDALProgressFuncDelegate(ProgressFunc), "Intersection");
break;
case "Union":
layer1.Union(layer2, layer, options, new Ogr.GDALProgressFuncDelegate(ProgressFunc), "Union");
break;
case "SymDifference":
layer1.SymDifference(layer2, layer, options, new Ogr.GDALProgressFuncDelegate(ProgressFunc), "SymDifference");
break;
case "Identity":
layer1.Identity(layer2, layer, options, new Ogr.GDALProgressFuncDelegate(ProgressFunc), "Identity");
break;
case "Update":
layer1.Update(layer2, layer, options, new Ogr.GDALProgressFuncDelegate(ProgressFunc), "Update");
break;
case "Clip":
layer1.Clip(layer2, layer, options, new Ogr.GDALProgressFuncDelegate(ProgressFunc), "Clip");
break;
case "Erase":
layer1.Erase(layer2, layer, options, new Ogr.GDALProgressFuncDelegate(ProgressFunc), "Erase");
break;
}
}
catch (Exception e)
{
Console.WriteLine("Application error: " + e.Message);
}
}
public static int ProgressFunc(double Complete, IntPtr Message, IntPtr Data)
{
Console.Write("Processing ... " + Complete * 100 + "% Completed.");
if (Message != IntPtr.Zero)
Console.Write(" Message:" + System.Runtime.InteropServices.Marshal.PtrToStringAnsi(Message));
if (Data != IntPtr.Zero)
Console.Write(" Data:" + System.Runtime.InteropServices.Marshal.PtrToStringAnsi(Data));
Console.WriteLine("");
return 1;
}
}
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