• (a.) Of or pertaining to heliography or a heliograph; made by heliography. • (a.) Of or pertaining to a description of the sun.
He`li·o·graph'ic adjective Of or pertaining to heliography or a heliograph; made by heliography. Heliographic chart . 
heliographic 1. A reference to an apparatus that takes photographs of the sun. 2. Relating to an instrument that measures the intensity of sunlight.