NAME
	field to map - transforms a 2D scalar field to a surface in 3D space,
		       with boundary and colour information.

SUMMARY
	Name 		field to map

	Type 		mapper

	Inputs		field 2D scalar float 2-coord uniform
			colourmap

	Outputs		geometry

	Parameters	Name		Type	Default Min	Max
			number x ticks	integer	   2	 2	20
			number y ticks	integer	   2	 2	20
			z scale		float	  0.1	  unbound
			boundary width	float 	  1.0	0.0	10.0
			text height	float	  0.05	0.0	1.0
			projection	choice	linear
DESCRIPTION
	The field to map module converts 2D scalar field into a surface
	in 3D space, represented as a GEOM-format mesh. The geometry is 
	annotated with boundaries, tick marks and a colour scale, for 
	geographic map visualisation.


PARAMETERS
	number x ticks
		number of ticks on the x boundary
	number y ticks
		number of ticks on the y boundary
	z scale
		determines the height of the mesh
	boundary width
		specifies the width of the boundary and colour scale
	text height
		specifies the height of the text
	projection 
		specifies the map projection, presently linear or mercator

INPUTS
	Data Field (field 2D scalar float 2-coord uniform)
		The input data must be a 2D field with a scalar data value 
		at each element. The extents of the field are used to 
		annotate the map.

OUTPUTS
	Geometry
		The output is an AVS geometry.


AUTHOR
	Andy Bingham 
	Dept. of Earth Sciences
	Oxford University
	andyb@uk.ac.ox.earth