Ngl.gc_interp

Interpolates points along a great circle between two specified points on the globe.

Prototype

lat,lon = Ngl.gc_interp(lat1, lon1, lat2, lon2, npts)

Arguments

Latitude and longitude, in degrees, of the first point on the globe.

Latitude and longitude, in degrees, of second point on the globe.

The number of equally-spaced points you want to interpolate to.

Return values

The returned latitudes and longitudes are returned as NumPy arrays in degrees in the interval [0.,360) if npts is positive and in the interval [-180.,180.) if npts is negative.

Description

This function interpolates points along a great circle between two specified points on the globe. The arguments lat1 and lon1 specify the latitude and longitude of the first point; the arguments lat2 and lon2 specify the latitude and longitude of the second point. The argument npts specifies the number of points you want to interpolate - this number includes the original two points (the number of points actually interpolated is npts-2).

See Also

Ngl.gc_convert, Ngl.gc_dist, Ngl.gc_inout, Ngl.gc_interp, Ngl.gc_qarea, Ngl.gc_tarea

Examples

The following Python code snippet:

  npts = 10
  lat,lon = Ngl.gc_interp(0.,300.,0.,310.,-npts)
  for i in range(npts):
    print "%3d %10.5f %10.5f" % (i,lat[i],lon[i])

  0    0.00000  -60.00000
  1    0.00000  -58.88889
  2    0.00000  -57.77778
  3    0.00000  -56.66667
  4    0.00000  -55.55556
  5    0.00000  -54.44445
  6    0.00000  -53.33334
  7    0.00000  -52.22223
  8    0.00000  -51.11111
  9    0.00000  -50.00000