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importShape.cpp

Shows how to import geographical data in shapefile format

    /************************************************************************************
    TerraLib - a library for developing GIS applications.
    Copyright © 2001-2004 INPE and Tecgraf/PUC-Rio.

    This code is part of the TerraLib library.
    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    You should have received a copy of the GNU Lesser General Public
    License along with this library.

    The authors reassure the license terms regarding the warranties.
    They specifically disclaim any warranties, including, but not limited to,
    the implied warranties of merchantability and fitness for a particular purpose.
    The library provided hereunder is on an "as is" basis, and the authors have no
    obligation to provide maintenance, support, updates, enhancements, or modifications.
    In no event shall INPE and Tecgraf / PUC-Rio be held liable to any party for direct,
    indirect, special, incidental, or consequential damages arising out of the use
    of this library and its documentation.
    *************************************************************************************/
    /*
               This file shows an example of importing a shapefile that will create
               an attribute and a geometry table in a TerraLib database.

               Author: Lubia Vinhas
    */

    #include "../../src/terralib/drivers/shapelib/TeDriverSHPDBF.h"
    #include "../../src/terralib/drivers/MySQL/TeMySQL.h"

    using namespace std;
    #include <string>

    int main()
    {
               // Open a connection to the "DB320RC1" TerraLib database
               // Datatabase server parameters
               string host = "localhost";
               string dbname = "DB320RC1";
               string user = "root";
               string password = "vinhas";

               TeMySQL* db = new TeMySQL();
               if (!db->connect(host, user, password, dbname))
               {
                          cout << "Error: " << db->errorMessage() << endl;
                          cout << "Press Enter\n";
                          getchar();
                          return 1;
               }

               string layerName = "Brasil";

               // Check whether there is a layer with the name Brasil in the database
               TeLayer *layer = 0;
               if (db->layerExist(layerName))
               {
                          cout << "The database already has an infolayer with the name \"";
                          cout << layerName << "\" !" << endl << endl;
                          if (db->loadLayerSet() == true)
                          {
                                     // Get the layer named "Brasil" from the cache
                                     TeLayerMap& layerMap = db->layerMap();
                                     map<int, TeLayer*>::iterator it;
                                     for (it = layerMap.begin(); it != layerMap.end(); ++it)
                                     {
                                                layer = it->second;
                                                if (layer->name() == layerName)
                                                           break;
                                     }
                          }
               }
               else
               {
                          // Import the shape file
                          // Define a projection. It cannot be decoded from a shapefile
                          TeDatum sad69 = TeDatumFactory::make("SAD69");
                          TePolyconic* proj = new TePolyconic(sad69, -54.0*TeCDR);
                          layer = new TeLayer(layerName, db, proj);

                          string filename = "../data/EstadosBrasil.shp";         // Shapefile path
                          string tablename = "BrasilIBGE"; // Name of the attribute table
                          string linkcolumn = "SPRROTULO"; // Column that will link the attributes and geometry tables

                          if (TeImportShape(layer, filename, tablename, linkcolumn))
                                     cout << "The shapefile was imported successfully into the TerraLib database!\n" << endl;
                          else
                          {
                                     cout << "Error: Fail to import the shapefile!\n" << endl;
                                     db->close();
                                     delete db;
                                     cout << "Press Enter\n";
                                     getchar();
                                     return 1;
                          }
               }

               // Show some information about the layer associated to the shape file
               cout << "Layer: " << layer->name() << ", id: " << layer->id() << endl;

               // Geometries information
               cout << "Projection: " << layer->projection()->name();
               cout << "/" << layer->projection()->datum().name();
               TeBox bb = layer->box();
               char message[255];
               sprintf(message,"[%.15f,%.15f,%.15f,%.15f]\n",bb.x1_, bb.y1_, bb.x2_, bb.y2_);
               cout << "\nBounding box: " << message;
               cout << "Number of polygons: " << layer->nGeometries(TePOLYGONS) << endl;
               cout << "Number of lines: "    << layer->nGeometries(TeLINES) << endl;
               cout << "Number of points: "   << layer->nGeometries(TePOINTS) << endl;

               // Information of the Tables of Attributes of the Layer
               TeAttrTableVector tableVec;
               layer->getAttrTables(tableVec);
               cout << "Number of Attribute Tables: " << tableVec.size() << endl;

               for (unsigned int i = 0; i < tableVec.size(); ++i)
               {
                          cout << "Attribute Table " << "\"" << tableVec[i].name() << "\": ";
                          cout << layer->nObjects(tableVec[i].name()) << " objects" << endl << endl;
               }

               db->close();
               delete db;
               cout << "Press Enter\n";
               getchar();
               return 0;
    }

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