1 GRID_EXTEND Grid into a cube irregularly sampled data from an input table
        GRID_EXTEND

    This task makes a cube from a table containing irregularly sampled data.
    The data is interpolated/extrapolated using a  convolution  taking  into
    account the beam size of the observing telescope.

    In mode NATURAL, a convolution kernel is used to interpolate the irregu-
    larly sampled data using the weight of each individual point.

    In mode UNIFORM, the same convolution process is used but the individual
    points are assumed to have equal weight.

    The  pixel size is specified by the user, but the map size is determined
    by the task.  The input table can be created by command GRID  in  CLASS,
    or using task TABLE from a formatted file.

2 TABLE$
        TASK\CHARACTER "Input TABLE name" TABLE$

    Specify the name of the input table.

2 MAP$
        TASK\CHARACTER "Output MAP name" MAP$

    Specify  the name of the output map. The output map will be in VLM order
    (Velocity, X coordinate, Y coordinate).

2 XCOL$
        TASK\INTEGER "Column of X coordinates" XCOL$

    Specify the column of the table containing the X coordinates

2 YCOL$
        TASK\INTEGER "Column of Y coordinates" YCOL$

    Specify the column of the table containing the Y coordinates

2 WCOL$
        TASK\INTEGER "Column for weights" WCOL$

    Specify the column containing the weights

2 MCOL$
        TASK\INTEGER "First and last column to grid" MCOL$[2]

    Specify the first and last column to be regridded. Note that the  weight
    column can be included in order to produce a weight image.  This can al-
    low further processing based on Signal-to-Noise ratio.

2 WEIGHT_MODE$
        TASK\CHARACTER "Gridding Mode (NAtural or UNiform)" WEIGHT_MODE$

    Indicate the weight mode. NATURAL indicates a  convolution  with  proper
    weighting, UNIFORM a convolution without weighting.

2 TOLE$
        TASK\REAL "X-Y position tolerance" TOLE$

    Positional  tolerance.  Points  separated less than TOLE$ (on each axis)
    are added together before resampling.

2 BEAM$
        TASK\REAL "Primary Beam Size" BEAM$

    Size of the beam used to obtain the data (in user units, not in pixels)

2 SPACING$
        TASK\REAL "Pixel separation" SPACING$

    Desired pixel size in user units.

1 ENDOFHELP



























































