SURFLIB_CALC_OUTPUT_GRID - Calculate the grid required to contain data given the X,Y positions

Description:

Finds the extent of the data (given X and Y) and then reports back the size of the grid that is necessary to contain the data. Also returns the reference pixel position.

Invocation:

CALL SURFLIB_CALC_OUTPUT_GRID (N_FILES, N_PTS, PIXEL_SZ, X_PTR, Y_PTR, NX, NY, I_CENTRE, J_CENTRE, STATUS )

Arguments:

N_FILES = INTEGER (Given)

Number of data sets (ie files)

N_PTS = INTEGER (Given)

Number of X,Y pairs supplied

PIXEL_SZ = REAL (Given)

Size of each pixel (radians)

X_PTR( N_FILES ) = INTEGER (Given)

Pointers to arrays containing DOUBLE PRECISION X positions

Y_PTR( N_FILES ) = INTEGER (Given)

Pointers to arrays containing DOUBLE PRECISION Y positions

NX = INTEGER (Given)

Required number of points in X in output grid

NY = INTEGER (Given)

Required number of points in Y in output grid

I_CENTRE = INTEGER (Given)

Location of reference pixel in X

J_CENTRE = INTEGER (Given)

Location of reference pixel in Y

STATUS = INTEGER (Given & Returned)

Global Status

Notes:

• This routine requires double precision arguments for the X and Y coordinates.

Copyright

Copyright ©1995,1996,1997,1998,1999 Particle Physics and Astronomy Research Council. All Rights Reserved.