pyproj returning inf for UTM

Question

I am gettin x = [inf inf inf.....] and y = [inf inf inf...]. Has anyone encountered this error before? I am attempting to convert lon and lat into xy values. I have the following code but I cannot figure out what is incorrect. This is San Diego data set.

import scipy.io;
from pyproj import Proj;

canyon = scipy.io.loadmat('INIT.MAT');
topo = canyon.get('siocanyon');

lat = tuple(topo[:, 0])
lon = tuple(topo[:, 1])
z = topo[:, 2]

myProj = Proj(proj='utm', zone=11, ellps='WGS84', preserve_units=False)
y, x = myProj(lon, lat)

Answer 1

I just tested the code with a sample position from San Diego:

from pyproj import Proj

lat = 32.715687
lon = -117.161380
#z = 100

myProj = Proj(proj='utm', zone=11, ellps='WGS84', preserve_units=False)
x, y = myProj(lon, lat)
print(x, y)

gives

484876.3791751535 3619780.206742558

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