Re: [python-users] MetPy NEXRAD Level 2 - Can get lat, lon out to usefor plotting map?

  • To: Ryan Connelly <rconne01@xxxxxxxxx>
  • Subject: Re: [python-users] MetPy NEXRAD Level 2 - Can get lat, lon out to usefor plotting map?
  • From: Brian Blaylock <blaylockbk@xxxxxxxxx>
  • Date: Tue, 25 Apr 2017 17:30:13 -0600
Nice!
As for your error, I took a quick look at your script. If you use Basemap, you 
should draw the coastlines on the map object, m. Not the axis object, ax.

m.drawcoatlines()

Sent from Mail for Windows 10

From: Ryan Connelly
Sent: Tuesday, April 25, 2017 4:39 PM
To: Brian Blaylock
Cc: python-users@xxxxxxxxxxxxxxxx
Subject: Re: [python-users] MetPy NEXRAD Level 2 - Can get lat, lon out to 
usefor plotting map?

Hi Kevin and Brian,

I used Brian's script, which successfully georeferences the radar data.  But 
I'm still not getting my Cartopy features to show up.  I would just use 
Basemap, except that that throws an error: 
AttributeError: 'GeoAxesSubplot' object has no attribute 'drawcoastlines'.

I've attached my modified version of the code, as well as an example plot.

Thanks,
Ryan

On Tue, Apr 25, 2017 at 11:06 AM, Brian Blaylock <blaylockbk@xxxxxxxxx> wrote:
Hi Ryan,

I was just about to reply, when I saw Kevin's email. I did what he suggested 
(using pyproj to convert the range and azimuth to a latitude longitude). I 
documented my method here: 
http://kbkb-wx-python.blogspot.com/2016/07/plotting-radar-data-with-metpy-pyproj.html



 Brian

On Mon, Apr 24, 2017 at 4:36 PM, Ryan Connelly <rconne01@xxxxxxxxx> wrote:
Hi,

Using this code: 
https://unidata.github.io/MetPy/examples/formats/NEXRAD_Level_2_File.html#sphx-glr-examples-formats-nexrad-level-2-file-py

Ideally, I should be able to just extract a lat and a lon variable from the 
file, except that I don't know if they exist, and if they do, what their names 
are.

>From there, I'd like to plot the georeferenced data over a base map using 
>CartoPy.  Is this possible?  (I just happen to already have some shapefiles on 
>hand that I want to use that I know CartoPy can read in.)

Thanks,
Ryan


-- 
Ryan Connelly
M.S. Student in Atmospheric Sciences, Stony Brook University
B.S. in Meteorology with Minors in Mathematics and GIS, Valparaiso University
rconne01@xxxxxxxxx
ryan.connelly@xxxxxxxxxxxxxx

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-- 
Ryan Connelly
M.S. Student in Atmospheric Sciences, Stony Brook University
B.S. in Meteorology with Minors in Mathematics and GIS, Valparaiso University
rconne01@xxxxxxxxx
ryan.connelly@xxxxxxxxxxxxxx

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