Schema for Grid Exchange File (GXF) format, revision 3. Based on GML2.1.1 A GXFGrid element represents the root for a GXF grid. Captures the simple and complex properties (e.g. associations) of a GXF grid. As GXF data may store objects in any order, the GXFGrid properties are contained within an xsd:all group. Title of the grid. This corresponds to the #TITLE object in GXF3. Number of points in a grid row. This corresponds to the #POINTS object in GXF3. Number of rows in the grid. This corresponds to the #ROWS object in GXF3. Sense of the grid. This corresponds to the #SENSE object in GXF3. Origin of the grid. The coordinates of the point correspond to #XORIGIN and #YORIGIN objects in GXF3. Rotation of the grid. This corresponds to the #ROTATION object in GXF3. Separation between points in the grid. This corresponds to the #PTSEPARATION object in GXF3. Separation between rows in the grid. This corresponds to the #RWSEPARATION object in GXF3. zMinimum of the grid. This corresponds to the #ZMINIMUM object in GXF3. zMaximum of the grid. This corresponds to the #ZMAXIMUM object in GXF3. A specified 'dummy' value in the grid. This corresponds to the #DUMMY object in GXF3. gType for the grid. This corresponds to the #GTYPE object in GXF3. The gType is used to specify the number of digits to use for base-90 compression of the grid data. This type acts as like an association class, such that it may contain or point to a remote object. It is a base type for other specialized association types (e.g. UnitLengthReferenceType). The value of the gml:remoteSchema attribute can be used to locate a schema fragment that constrains the target instance. An association property that contains a Transform object. Transformation parameters. This type corresponds to the #TRANSFORM object in GXF3. Association property that contains or points to a Unit object. Describes the grid units. This type corresponds to the #UNIT_LENGTH object in GXF3. Association property that contains or points to a GeographicCoordinateSystem or ProjectedCoordinateSystem object. Models the geographic coordinate system. This type corresponds to the #MAP_PROJECTION object in GXF3. Models the projected coordinate system. This type corresponds to the #MAP_PROJECTION object in GXF3. Association property that contains or points to a ProjectionMethod object. Models a generic projection method. Association property that contains or points to a DatumTransform object. Models the datum transformation. This corresponds to the #MAP_DATUM_TRANSFORM object in GXF3. Type for the gridValue property The value for the grid. This corresponds to the #GRID object in GXF3. Captures the grid data. It is simply a string list. Enumerated list of possible values for the Sense property.