[ncl-talk] Antarctic map outline database

[Rick Brownrigg]

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:
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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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>
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