On the mathematical side, coming out of his work for the Coast Survey, we mention that he was interested in conformal map projections where he invented a quincuncial map projection using elliptic functions .
Sa matematika gilid, mula sa kanyang trabaho para sa Coast Survey, namin banggitin na siya ay interesado sa conformal map projections na kung saan siya imbento ng isang quincuncial projection ng mapa gamit ang tambilugin function.