Date: Tue Apr 09 2013 - 11:25:40 MDT
Hi Mary.
Your current example shapefile_12 misses some of the requested highway
segments. Attached is a corrected script. Please consider using this
version on the example website. Compare your example plot
here<http://www.ncl.ucar.edu/Applications/Images/shapefiles_12_lg.png>
to
the corrected version:
[image: Inline image 1]
The problem is that this particular highway shape file contains some
complex entries in the feature_names, for example "I- 5, US 30". You need
to add a little extra string handling code to adapt to these complex name
strings.
--Dave
On Tue, Apr 9, 2013 at 9:12 AM, Mary Haley <haley@ucar.edu> wrote:
> Hi folks,
>
> I updated the example to add a simple text legend. I kept wondering which
> highway that little brown line was. :-)
>
> If you need to query a shapefile string variable in order to determine
> whether to draw a certain feature (for example to draw only highways that
> start with "I-"), then you can use the str_match_ind function (see also the
> other str_xxxx functions for more string processing).
>
> --Mary
>
> On Apr 8, 2013, at 7:57 PM, Jim Means wrote:
>
> Mary Haley was kind enough to just create an example that showed how to
> plot highways using a shapefile from NOAA:
>
> http://www.ncl.ucar.edu/Applications/shapefiles.shtml
>
> It's the last example on the page, shapefiles_12.ncl. I used code from
> that example to overlay radar data on a highway map, that sounds somewhat
> similar to what you're doing.
>
> Jim
>
> On 4/9/2013 00:55, Luo, Chao wrote:
>
> Hi,
>
> I am trying to make plot for visualization of local pollutants
> distribution overlap on main highways, and was wondering if NCL has such
> function, which can be used to do it.
>
> Very appreciate any suggestion and help!
>
> cl
>
>
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