conformal

1. (mathematics, of a transformation) That preserves angles between intersecting curves.Examples: "1991 [Elsevier Science], Roland Schinzinger, Patricio A. A. Laura, Conformal Mapping: Methods and Applications, 2003, Dover, page 508, This would have been tantamount to a conformal transformation."; "Let us find all conformal transformations in d dimensions."; "In regions of S where the packings become more deeply embedded in purely hexagonal generations during refinement, the local dilatation approaches 1 and the maps become progressively more conformal."

2. (cartography, of a map projection) That preserves relative angles over small scales, at all but a limited number of distinct points.Examples: "On conformal map projections, the scale depends on location only and not direction."