API Reference > imodeljs-common > Geometry > GridFileTransform GridFileTransform Class This class represents a grid files based geodetic transformation. Implements GridFileTransformProps Methods Name Description constructor(data?: GridFileTransformProps): GridFileTransform equals(other: GridFileTransform): boolean Compares two Grid File Transforms. toJSON(): GridFileTransformProps Creates a JSON from the Grid File Transform definition fromJSON(data: GridFileTransformProps): GridFileTransform Static Creates a Grid File Transform from JSON representation. Properties Name Type Description fallback Readonly undefined | PositionalVectorTransform The positional vector fallback transformation used for extents not covered by the grid files files Readonly GridFileDefinition[] The list of grid files. Defined in core/common/src/geometry/GeodeticDatum.ts Line 278 Last Updated: 12 June, 2024