[ncl-talk] Plotting climate division and counties at the same time

[Ling Huang]

Hi Rick,

As pointed by Alan, the climate division boundaries should align with the
county boundaries, IF both were from NCL's default settings.

I guess the problem lies in the "climdiv_polygon.nc" file that I downloaded
from NCL's website. The latitude and longitude provided by this file seem
mismatched with the default NCL setting as shown below. Maybe there is
another file that is more consistent with NCL's default setting?

Thanks

Ling

[image: Displaying image.png]

On Thu, Apr 16, 2015 at 8:51 AM, Rick Brownrigg <brownrig at ucar.edu> wrote:

> Hi Ling,
>
> This is a tough one -- off hand it looks like a classic issue of mixing
> two disparate geodata sources of very different scales/resolutions, which
> typically incur alignment/registration issues. If that's what is going on,
> I don't think there's much you can really do about it. Do you know what are
> the relative scales of the different sources?   Is there a reason to
> believe the climate division boundaries would align with the county
> (political) boundaries? (e.g., are they semi-arbitrarily defined that way
> for convenience?)
>
> Rick
>
> On Wed, Apr 15, 2015 at 9:43 PM, Ling Huang <hlbutterflyut at gmail.com>
> wrote:
>
>> Dear NCL talk,
>>
>> I want to show boundaries of climate division and counties over the same
>> plot. But the boundaries of climate divisions and counties are provided by
>> different map dataset, which means I can only draw each at a time. Is there
>> a way that I can show them at the same time? For example, I want to combine
>> the following two plots into one plot.
>>
>> The left one shows the boundaries of climate divisions and the right one
>> shows county.
>>
>> [image: Inline image 1][image: Inline image 2]
>>
>> I tried to load counties boundaries while reading the "
>> climdiv_polygons.nc" to plot a polyline for the climate division. But it
>> seems the boundaries do not match, like below:
>>
>> [image: Inline image 3]
>>
>> Is there a way that I can do this?
>>
>> Thank you very much!
>>
>> Ling
>>
>> _______________________________________________
>> ncl-talk mailing list
>> List instructions, subscriber options, unsubscribe:
>> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
>>
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mailman.ucar.edu/pipermail/ncl-talk/attachments/20150416/3c872083/attachment-0001.html 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image.png
Type: image/png
Size: 32078 bytes
Desc: not available
Url : http://mailman.ucar.edu/pipermail/ncl-talk/attachments/20150416/3c872083/attachment-0004.png 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image.png
Type: image/png
Size: 47653 bytes
Desc: not available
Url : http://mailman.ucar.edu/pipermail/ncl-talk/attachments/20150416/3c872083/attachment-0005.png 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image.png
Type: image/png
Size: 67526 bytes
Desc: not available
Url : http://mailman.ucar.edu/pipermail/ncl-talk/attachments/20150416/3c872083/attachment-0006.png 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image.png
Type: image/png
Size: 38157 bytes
Desc: not available
Url : http://mailman.ucar.edu/pipermail/ncl-talk/attachments/20150416/3c872083/attachment-0007.png