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importGeoTab.cpp

Shows how to import geographical data in SPRING GEO/TAB 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 how to import some geographical data in
               the SPRING Geo/Tab format to a TerraLib database.

               Author: Lubia Vinhas
    */

    #include "../../src/terralib/functions/TeDriverSPRING.h"
    #include "../../src/terralib/drivers/MySQL/TeMySQL.h"

    int main()
    {
               // Datatabase server parameters
               string host = "localhost";
               string dbname = "DB320RC1";
               string user = "root";
               string password = "vinhas";

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

               // Import the SPRING geo file
               string filename = "../data/Cadastro_Escolas.geo";
               string layerName = "Cadastro_Escolas";
               TeLayer* layer = 0;
               if (db->layerExist(layerName))
               {
                          cout << "There is already a layer named \"Cadastro_Escolas\" in the TerraLib database!\n\n";
                          if (db->loadLayerSet() == true)
                          {
                                     // Get the layer named "Cadastro_Escolas" 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
               {
                          layer = new TeLayer(layerName, db);
                          if (TeImportGEO(layer, filename, layerName))
                                     cout << "The SPRING GEO/TAB file was imported successfully to the TerraLib database!\n\n";
                          else
                          {
                                     cout << "Fail to import the SPRING GEO/TAB file!\n\n";
                                     db->close();
                                     delete db;
                                     cout << "Press Enter\n";
                                     getchar();
                                     return 1;
                          }
               }

               // Show some information about the new layer created
               cout << "Layer created: " << 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;

               // Attributes information
               TeAttrTableVector tableVec;
               layer->getAttrTables(tableVec);
               cout << "Attribute tables: " << tableVec.size() << endl;
               if (tableVec.size() > 0)
               {
                          TeAttrTableVector::iterator it = tableVec.begin();
                          while (it != tableVec.end())
                          {
                                     cout << (*it).name() << ": ";
                                     cout << layer->nObjects((*it).name()) << " objects\n" << endl;
                                     ++it;
                          }
               }

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

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