.. _program_listing_file_src_navtk_geospatial_sources_ElevationSource.hpp:

Program Listing for File ElevationSource.hpp
============================================

|exhale_lsh| :ref:`Return to documentation for file <file_src_navtk_geospatial_sources_ElevationSource.hpp>` (``src/navtk/geospatial/sources/ElevationSource.hpp``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   #pragma once
   
   #include <string>
   #include <utility>
   
   #include <navtk/aspn.hpp>
   #include <navtk/geospatial/sources/SpatialMapDataSource.hpp>
   
   namespace navtk {
   namespace geospatial {
   
   class ElevationSource : public SpatialMapDataSource {
   public:
       virtual AspnMeasurementAltitudeReference get_output_vertical_reference_frame() const;
   
       virtual void set_output_vertical_reference_frame(AspnMeasurementAltitudeReference new_ref) = 0;
   
   protected:
       AspnMeasurementAltitudeReference input_reference;
       AspnMeasurementAltitudeReference output_reference;
   };
   }  // namespace geospatial
   }  // namespace navtk