Start doing it with OTB classes

mapnikOTBClasses.cxx

+#include "otbVectorDataFileReader.h"
+#include "otbVectorData.h"
+#include "otbVectorDataProjectionFilter.h"
+#include <fstream>
+#include <iostream>
 
+#include "itkRGBAPixel.h"
+#include "otbImage.h"
+#include "otbVectorDataToImageFilter.h"
 
 int main(int argc, char * argv[])
 {
 
+  //Read the vector data
+  typedef otb::VectorDataFileReader<VectorDataType> VectorDataFileReaderType;
+  VectorDataFileReaderType::Pointer reader = VectorDataFileReaderType::New();
+
+  reader->SetFileName(argv[1]);
+
+  //Reproject the vector data in the proper projection
+  typedef otb::VectorDataProjectionFilter<VectorDataType, VectorDataType> ProjectionFilterType;
+  ProjectionFilterType::Pointer projection = ProjectionFilterType::New();
+  projection->SetInput(reader->GetOutput());
+//   projection->Update();
+
+  //Convert the vector data into an image
+  typedef itk::RGBAPixel< unsigned char > PixelType;
+  typedef otb::Image<PixelType> ImageType;
+  typedef otb::VectorDataToImageFilter<VectorDataType, ImageType> VectorDataToImageFilterType;
+  VectorDataToImageFilterType::Pointer vectorDataRendering = VectorDataToImageFilterType::New();
+  vectorDataRendering->SetInput(projection->GetOutput());
+
+  //Save the image in a file
+  typedef otb::ImageFileWriter<ImageType> WriterType;
+  WriterType::Pointer writer = WriterType::New();
+  writer->SetInput(vectorDataRendering);
+  writer->SetFileName(argv[2]);
+  writer->Update();
+
+
 
   return EXIT_SUCCESS;
 }
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