[ncl-talk] Antarctic map outline database

[Manisha Ganeshan]

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.
>>>>
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>>>>
>>>
>>
>>
>> --
>> 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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