self->viewer = viewer;
GisMarker *marker = gis_marker_new("St. Charles");
- gis_point_set_lle(gis_object_center(marker), 38.841847, -90.491982, 0);
+ gis_point_set_lle(gis_object_center(GIS_OBJECT(marker)), 38.841847, -90.491982, 0);
gis_viewer_add(self->viewer, GIS_OBJECT(marker));
return self;