diff --git a/src/main.cpp b/src/main.cpp
index 486af9e..9383f98 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -66,7 +66,7 @@ std::tuple<double, double> local_to_projected(double* geotransform, int x, int y
 void write_output_file(std::vector<CellMap> cellmaps, const char *filepath)
 {
 
-    const char *pszDriverName = "ESRI Shapefile";
+    const char *pszDriverName = "GeoJSON";
     GDALDriver *poDriver;
 
     GDALAllRegister();
@@ -109,7 +109,7 @@ void write_output_file(std::vector<CellMap> cellmaps, const char *filepath)
     {
         CellMap* cellmap = &cellmaps[j];
         OGRFeature *feature;
-        OGRLineString *geometry;
+        OGRLineString *geometry = new OGRLineString();
         feature = OGRFeature::CreateFeature( poLayer->GetLayerDefn() );
         feature->SetField( "Name", j );
         for (int i = 0; i < cellmap->height*cellmap->width; i++) 
@@ -118,15 +118,9 @@ void write_output_file(std::vector<CellMap> cellmaps, const char *filepath)
             {
                 int x_raw = i%cellmap->width;
                 int y_raw = i/cellmap->width;
-
-                std::cout << "🤬"; std::cout.flush();
-
-
                 auto [x, y] = local_to_projected(cellmap->geotransform, x_raw, y_raw);
-                
-
-                geometry->setPoint( i, x, y );
-                
+                //std::cout << x << ", " << y << "  ";
+                geometry->setPoint( geometry->getNumPoints(), x, y );   
             }
             
         }
@@ -180,5 +174,5 @@ int main(int argc, const char* argv[])
     */
     
     auto cellmaps = vector_cellmap(&map, 5);
-    write_output_file(cellmaps, "out.shp");
+    write_output_file(cellmaps, "out.geojson");
 }
\ No newline at end of file