BMAPXY

A map of Bx and By vs x and y.

Parameter Name	Units	Type	Default	Description
L	$M$	double	0.0	length
STRENGTH	$NULL$	double	0.0	factor by which to multiply field
ACCURACY	$NULL$	double	0.0	integration accuracy
METHOD	$NULL$	STRING	NULL	integration method (runge-kutta, bulirsch-stoer, modified-midpoint, two-pass modified-midpoint, leap-frog, non-adaptive runge-kutta
FILENAME	$NULL$	STRING	NULL	name of file containing columns (x, y, Fx, Fy) giving normalized field (Fx, Fy) vs (x, y)