Added get_lmp_loc() method to caiso for retrieving geographic locations of lmp nodes.

[dzimmanck]

I added a simple method to caiso that grabs LMP location data from CAISO's online interactive price map. This can be used to generate geo maps from the LMP data pulled using pyiso.

[aschn]

This looks great! Can you add these lines to the bottom of tests.test_caiso? Then we'll be good to merge.

    def test_lmp_loc(self):
        c = client_factory('CAISO')
        loc_data = c.get_lmp_loc()

        # one entry for each node
        # expected count is 4238
        self.assertGreater(len(loc_data), 4000)

        # check keys
        self.assertItemsEqual(loc_data[0].keys(),
                              ['node_id', 'latitude', 'longitude', 'area'])

[dandxy89]

Fails due to Authorization

[aschn]

Hi @dandxy89 ! Did you try adding environment variables for these accounts when you run the tests? http://pyiso.readthedocs.org/en/latest/configuration.html#accounts

[dandxy89]

The variables are only for New England ISO and European ISO. Not why they would help? :S

[ndavis6]

@dandxy89 Did you ever figure out the environment variable problem?

[dandxy89]

Not sure anymore, this was almost a year ago I was working on ISO consumers.