PoleMethod(value, names=None, module=None, type=None, start=1)¶
Indicates which type of artificial pole to construct on the source
NONE= <PoleMethod.NONE: 0>¶
No pole. Destination points which lie above the top or below the bottom row of the source
Gridwon’t be mapped.
ALLAVG= <PoleMethod.ALLAVG: 1>¶
Construct an artificial pole placed in the center of the top (or bottom) row of nodes, but projected onto the sphere formed by the rest of the grid. The value at this pole is the average of all the source values surrounding the pole.
NPNTAVG= <PoleMethod.NPNTAVG: 2>¶
Construct an artificial pole placed in the center of the top (or bottom) row of nodes, but projected onto the sphere formed by the rest of the grid. The value at this pole is the average of the N source nodes next to the pole and surrounding the destination point (i.e. the value may differ for each destination point). Here N is set by using the regridPoleNPnts parameter and ranges from 1 to the number of nodes around the pole. This option is useful for interpolating values which may be zeroed out by averaging around the entire pole (e.g. vector components).
TEETH= <PoleMethod.TEETH: 3>¶
No new pole point is constructed, instead the holes at the poles are filled by constructing triangles across the top and bottom row of the source
Grid. This can be useful because no averaging occurs, however, because the top and bottom of the sphere are now flat, for a big enough mismatch between the size of the destination and source pole holes, some destination points may still not be able to be mapped to the source