Validate half_sat > 0

[tomsaleeba]

migrated from JIRA

Steps:
-set half_sat == 0
-run the model

Expected:
Either the run works or we receive a message saying we can't use that value.

Actual:
The web server gives a 500 and the reason behind the scenes is a divide by 0 error.
We should probably add validation to all values to keep them in the 0...1 range.

/usr/local/lib/python2.7/dist-packages/natcap/invest/pollination.py:1267: RuntimeWarning: invalid value encountered in divide
  pat_array[valid_mask]))
/usr/local/lib/python2.7/dist-packages/numpy/core/_methods.py:29: RuntimeWarning: invalid value encountered in reduce
  return umr_minimum(a, axis, None, out, keepdims)
/usr/local/lib/python2.7/dist-packages/numpy/core/_methods.py:26: RuntimeWarning: invalid value encountered in reduce
  return umr_maximum(a, axis, None, out, keepdims)
/usr/local/lib/python2.7/dist-packages/natcap/invest/pollination.py:1267: RuntimeWarning: invalid value encountered in divide
  pat_array[valid_mask]))
/usr/local/lib/python2.7/dist-packages/numpy/core/_methods.py:29: RuntimeWarning: invalid value encountered in reduce
  return umr_minimum(a, axis, None, out, keepdims)
/usr/local/lib/python2.7/dist-packages/numpy/core/_methods.py:26: RuntimeWarning: invalid value encountered in reduce
  return umr_maximum(a, axis, None, out, keepdims)
/usr/local/lib/python2.7/dist-packages/natcap/invest/pollination.py:1267: RuntimeWarning: invalid value encountered in divide
  pat_array[valid_mask]))
/usr/local/lib/python2.7/dist-packages/numpy/core/_methods.py:29: RuntimeWarning: invalid value encountered in reduce
  return umr_minimum(a, axis, None, out, keepdims)
/usr/local/lib/python2.7/dist-packages/numpy/core/_methods.py:26: RuntimeWarning: invalid value encountered in reduce
  return umr_maximum(a, axis, None, out, keepdims)
/usr/local/lib/python2.7/dist-packages/natcap/invest/pollination.py:1293: RuntimeWarning: invalid value encountered in greater
  min_mask = valid_mask & (result > 1.0)
/usr/local/lib/python2.7/dist-packages/natcap/invest/pollination.py:1320: RuntimeWarning: invalid value encountered in less
  max_mask = valid_mask & (result < 0.0)
/usr/local/lib/python2.7/dist-packages/natcap/invest/pollination.py:1293: RuntimeWarning: invalid value encountered in greater
  min_mask = valid_mask & (result > 1.0)
/usr/local/lib/python2.7/dist-packages/natcap/invest/pollination.py:1320: RuntimeWarning: invalid value encountered in less
  max_mask = valid_mask & (result < 0.0)
/usr/local/lib/python2.7/dist-packages/natcap/invest/pollination.py:1267: RuntimeWarning: invalid value encountered in divide
  pat_array[valid_mask]))
/usr/local/lib/python2.7/dist-packages/numpy/core/_methods.py:29: RuntimeWarning: invalid value encountered in reduce
  return umr_minimum(a, axis, None, out, keepdims)
/usr/local/lib/python2.7/dist-packages/numpy/core/_methods.py:26: RuntimeWarning: invalid value encountered in reduce
  return umr_maximum(a, axis, None, out, keepdims)
/usr/local/lib/python2.7/dist-packages/natcap/invest/pollination.py:1293: RuntimeWarning: invalid value encountered in greater
  min_mask = valid_mask & (result > 1.0)
/usr/local/lib/python2.7/dist-packages/natcap/invest/pollination.py:1320: RuntimeWarning: invalid value encountered in less
  max_mask = valid_mask & (result < 0.0)
/usr/local/lib/python2.7/dist-packages/natcap/invest/pollination.py:1293: RuntimeWarning: invalid value encountered in greater
  min_mask = valid_mask & (result > 1.0)
/usr/local/lib/python2.7/dist-packages/natcap/invest/pollination.py:1320: RuntimeWarning: invalid value encountered in less
  max_mask = valid_mask & (result < 0.0)
DEBUG:natcap_wrapper:execution time 3754ms