Feature Representation

In addition to the generic FME feature attributes that FME Workbench adds to all features (see About Feature Type Attributes), this format adds the format-specific attributes described in this topic.

NGrid features specify a matrix of x, y, and z coordinates.

Attribute Name	Contents
ngrid_type	This will always be `ngrid_raster`.
ngrid_rasterID	A number that specifies the identification number for each raster.
ngrid_tableName	A string that specifies the name of the MapInfo TAB header file associated with each raster file.
ngrid_coordSys This attribute has been deprecated.	A string that specifies the MapInfo CoordSys coordinate system of each raster.
ngrid_coordSysName This attribute has been deprecated.	A string that specifies the CoordSys Name as seen in a MapInfo CoordSys string.
ngrid_rasterDesc	A string that specifies a description of the raster and its data.
ngrid_XYUnitName This attribute has been deprecated.	A string that specifies the name for the type of units used in the X and Y dimensions of the raster. Range: Any valid MapInfo coordinate string unit name
ngrid_coordUnits This attribute has been deprecated.	A number that specifies the units used in the X and Y dimensions of the raster, stored as a MapInfo unit value. Range: `miles\|kilometers\|inches\|feet\|yards\|` `millimeters\|centimeters\|meters\|` `survey_ft\|nauticalmiles\|links\|chains\|` `rods\|degrees\|user\|dB\|` `dBm\|dBW\|dBuV_m\|rad\|microsec`
ngrid_rasterVersion	A number that specifies the current version of each NGrid raster. Default: 2.0
ngrid_displayStatus	A number whose bits specify the display properties of each raster. Range: One byte Default: 0
ngrid_datatype	Specifies the data type for surface (non-paletted) NGrid files. The REAL16 data type is less precise but may have better compatibility with viewing applications. Range:`REAL16\|REAL32` Default:`REAL32`
ngrid_reserve1	A reserved value.
ngrid_reserve2	A reserved value.
ngrid_rasterModified	A number that specifies whether the raster has been modified. Range: 0\|1 Default: 0
ngrid_colorStructures	A number that specifies a pointer to the color structures in the NGrid raster handler. Default: 0
ngrid_GRDZMin	A number that specifies the minimum value for the elevation data in each raster. (Valid only for continuous rasters)
ngrid_GRDZMax	A number that specifies the maximum value for the elevation data in each raster. (Valid only for continuous rasters)
ngrid_GRDZUnitType	A number that specifies the unit type of the coordinate system of the Z dimension of each raster. (Valid only for continuous rasters)
ngrid_GRDZUnits	A string that specifies the name of the coordinate system name of the Z dimension of each raster. (Valid only for continuous rasters)
ngrid_GRDlightAzimuth	A number that specifies the azimuth of light for each raster. (Valid only for continuous rasters) Range: Any real number between 0 and 360
ngrid_GRDlightAngle	A number that specifies the angle of light for each raster. (Valid only for continuous rasters) Range: Any real number between 0 and 360
ngrid_GRDoptFlag	A number whose bits specify the continuous raster options. (Valid only for continuous rasters) Range: One byte
ngrid_GRDoptMask	A number whose bits specify the a mask for the `ngrid_GRDoptFlag` value. (Valid only for continuous rasters) Range: One byte
ngrid_GRDHSBrightness	A number that specifies the brightness of hill-shading for each raster. (Valid only for continuous rasters) Range: 0 to 255
ngrid_GRDHSContrast	A number that specifies the contrast of hill-shading for each raster. (Valid only for continuous rasters) Range: 0 to 255
ngrid_GRDnumInflectPts	A number that specifies how many valid inflection points there are for each raster. (Valid only for continuous rasters) Range: 0 to 64
ngrid_InflectionPt_ZValue	A number that specifies the Z dimension value (elevation) of the inflection points of each raster. (Valid only for continuous rasters) Range: Between `ngrid_GRDZMin` and `ngrid_GRDZMax`
ngrid_InflectionPt_Red	A number that specifies the red component of the color of the inflection points of each raster. (Valid only for continuous rasters) Range: 0 to 255
ngrid_InflectionPt_Green	A number that specifies the green component of the color of the inflection points of each raster. (Valid only for continuous rasters) Range: 0 to 255
ngrid_InflectionPt_Blue	A number that specifies the blue component of the color of the inflection points of each raster. (Valid only for continuous rasters) Range: 0 to 255
ngrid_HistZMin	A number that specifies the minimum value in the Z dimension (elevation) of the histogram for each raster. (Valid only for continuous rasters)
ngrid_HistZMax	A number that specifies the maximum value in the Z dimension (elevation) of the histogram for each raster. (Valid only for continuous rasters)
ngrid_HistNumNonNull	A number that specifies the number of Z dimension values (elevations) in each raster that are not null values. (Valid only for continuous rasters) Range: 0 up to the total number of raster elements
ngrid_HistNumValues	A number that specifies the number of values in the histogram for each raster. (Valid only for continuous rasters) Range: 0 to 65536
ngrid_HistData	A number that specifies a pointer to values in the histogram for each raster. (Valid only for continuous rasters)