[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[python #ELT-890167]: You Tube Tutorial MetPy Monday

This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.

  • Subject: [python #ELT-890167]: You Tube Tutorial MetPy Monday
  • Date: Mon, 28 Sep 2020 22:03:55 -0600
Greetings!

Good catch! Due to the periodic nature of latitude/longitude coordinates, 
latitudes outside +/- 90 would essentially wrap-- -94.45 is 4.45 past the south 
pole, heading back towards the north.

In *that* video, however, what you're seeing is a bug: the lat/lon variables 
are flipped from what they should be. The code should read:

    lat = 36.18
    lon = -94.45.

The code works just fine, however, because they are passed to 
`query.lonlat_point()` incorrectly. In the video, the call is 
`query.lonlat_point(lat, lon)`, when it should be:

    query.lonlat_point(lon, lat)

or put more explicitly (and avoiding the error):

    query.lonlat_point(lon=lon, lat=lat)

Demonstrating, however, that two wrongs can indeed make a right. ;)

Apologies for the confusion those errors caused, and thanks for reaching out!

Ryan

> Good Morning,
> I am trying to follow along with your tutorial
> https://youtu.be/fua3HF0PGTo
> I am looking at the code on the screen (at time 1:33 of the video) lines 15
> and 16 dealing with the latitude and longitude. I am confused how you can
> have a latitude of greater than 90 or less than -90.
> 
> Is this correct?
> 

Ticket Details
===================
Ticket ID: ELT-890167
Department: Support Python
Priority: Low
Status: Closed
===================
NOTE: All email exchanges with Unidata User Support are recorded in the Unidata 
inquiry tracking system and then made publicly available through the web.  If 
you do not want to have your interactions made available in this way, you must 
let us know in each email you send to us.