[ncl-talk] Antarctic map outline database

[Mary Haley]

Hi Manisha,

I believe Rick is on vacation today.

I've never seen this error before, but I think what's happening is that the
shapefile polygon you are trying to fill is simply too small to add to the
map.

The only reason you should be using gsn_add_shapefile_polygons is if you
need to fill the polygons in some color.  If you simply want to outline
them, then gsn_add_shapefile_polylines should be used.

If you really do need filled polygons, then can you point me to the
shapefile you are using?

Thanks,

--Mary




On Mon, Mar 5, 2018 at 3:31 PM, Manisha Ganeshan <
manisha.ganeshan86 at gmail.com> wrote:

> Hi Rick,
>
> Sorry for the slow follow-up. When I use *gsn_add_shapefile_polylines*,
> the map outline looks reasonable. However, when using
> *gsn_add_shapefile_polygons, * it only plots the small islands. I get the
> following error message. Any idea what might be causing this? I want to
> use the high-res Antarctic shapefile to mask out the continent and small
> islands.
>
>
> fatal:MapDataPolygon: ARSCAM - MCS TOO SMALL
>
> fatal:MapDataPolygon: ARSCAM - MCS TOO SMALL
>
>
> Thanks,
> Manisha
>
>
>
> On Tue, Aug 22, 2017 at 1:01 PM, Rick Brownrigg <brownrig at ucar.edu> wrote:
>
>> Hi,
>>
>> I'm not sure I understand the follow-on question regarding
>> cnFillDrawOrder. Examples 4 and 5 at the following link show how to mask
>> grids/data using a shapefile -- is that what you want to do?
>>
>> http://ncl.ucar.edu/Applications/shapefiles.shtml
>>
>>
>>
>> On Mon, Aug 21, 2017 at 5:58 PM, Manisha Ganeshan <
>> manisha.ganeshan86 at gmail.com> wrote:
>>
>>> Thanks, Rick! I've downloaded the shapefile, and am able to plot an
>>> accurate version of Antarctica's coastline.
>>>
>>> Presently, I use cnFillDrawOrder = predraw for masking out the
>>> continents. I'm wondering if there's a way to direct this function to use
>>> the shapefile for masking the continent instead of the default "DataBase"
>>> version.
>>>
>>> Thanks,
>>> Manisha
>>>
>>> On Mon, Aug 21, 2017 at 3:50 PM, Rick Brownrigg <brownrig at ucar.edu>
>>> wrote:
>>>
>>>> Hi Manisha,
>>>>
>>>> We generally recommend shapefiles as a source of more up-to-date,
>>>> higher-res map-data. There is a shapefile for Antarctica at:
>>>>
>>>>      gadm.org
>>>>
>>>> There are also a number of examples of using shapefiles with NCL at:
>>>>
>>>>     http://ncl.ucar.edu/Applications/shapefiles.shtml
>>>>
>>>> Hope that helps...
>>>>
>>>> Rick
>>>>
>>>> On Mon, Aug 21, 2017 at 12:55 PM, Manisha Ganeshan <
>>>> manisha.ganeshan86 at gmail.com> wrote:
>>>>
>>>>> Hello NCL'ers,
>>>>>
>>>>> I've tried plotting the Antarctic continental map outline using the
>>>>> default database, and the "MediumRes" database using mpDataBaseVersion. But
>>>>> the plot seems to be plotting the Ronne-Filchner ice-shelf in W. Antarctic,
>>>>> as part of the continent. Any idea what database I can use to plot the
>>>>> correct continental outline?
>>>>>
>>>>> Thanks,
>>>>> Manisha
>>>>>
>>>>> --
>>>>> Dr. Manisha Ganeshan
>>>>> Universities Space Research Association
>>>>> Maryland, U.S.A.
>>>>>
>>>>> _______________________________________________
>>>>> ncl-talk mailing list
>>>>> ncl-talk at ucar.edu
>>>>> List instructions, subscriber options, unsubscribe:
>>>>> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
>>>>>
>>>>>
>>>>
>>>
>>>
>>> --
>>> Dr. Manisha Ganeshan
>>> Universities Space Research Association
>>> Maryland, U.S.A.
>>>
>>
>>
>
>
> --
> Dr. Manisha Ganeshan
> Universities Space Research Association
> Maryland, U.S.A.
>
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