API Reference > core-common > Geometry > GridFileFormat GridFileFormat Type alias Type indicating the file format of the grid files. extensions GridFileFormat = "NONE" | "NTv1" | "NTv2" | "NADCON" | "FRENCH" | "JAPAN" | "ATS77" | "GEOCN" | "OSTN02" | "OSTN15" Defined in core/common/src/geometry/GeodeticDatum.ts Line 190 Last Updated: 20 June, 2023