[ncl-talk] Antarctic map outline database

[Manisha Ganeshan]

Hi Rick and Mary,

At this point, I've worked around it. I used a topography map to plot the
surface elevation as colored contours filling the Antarctic continent and
surrounding islands/ice-shelves. Then I used
*gsn_add_shapefile_polylines *function
to create the outline. So I won't be needing to the function
*gsn_add_shapefile_polygons* anymore.

But to answer your question, Rick, the wsMaximumSize in my .hluresfile is
500000000.

Thanks,
Manisha

On Thu, Mar 8, 2018 at 4:10 PM, Rick Brownrigg <brownrig at ucar.edu> wrote:

> HI Manisha,
>
> I've not seen this error before, but looking at the code, it suggests some
> internal work arrays might be too small. The function ARSCAM is used to
> extract boundaries of regions. You say only islands are getting drawn -- I
> can well imagine that the continent itself might be a rather large polygon
> composed of many segments.
>
> Do you have a file named ".hluresfile" in your home directory (note the
> leading "."), and if so, does it contain a line that starts with
> "*wsMaximumSize"? If so, what is the value given there?
>
> Rick
>
>
>
> On Tue, Mar 6, 2018 at 10:55 AM, Mary Haley <haley at ucar.edu> wrote:
>
>> 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.
>>>
>>> _______________________________________________
>>> ncl-talk mailing list
>>> ncl-talk at ucar.edu
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>>>
>>
>


-- 
Dr. Manisha Ganeshan
Universities Space Research Association
Maryland, U.S.A.
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