[ncl-talk] shapefile woes

[Rick Brownrigg]

That's odd -- what has changed to now introduce the file-extension error?
In any case, are you able to send me the shapefiles in question so that I
can check it out -- perhaps they are corrupt or something?



On Fri, Jun 3, 2016 at 7:18 AM, Matt Flournoy <mflournoy37 at gmail.com> wrote:

> Hi Rick,
>
> Thanks! I'm absolutely sure it's the correct path, and I now get a file
> extension error as well:
>
> ---
>
> fatal:["FileSupport.c":4159]:(/home/matt.flournoy/PECAN/overview/July06/new_shp/USA_county_shps/USA_adms2.shp)
> has no file extension, can't determine type of file to open
>
> (0) Error: gsn_add_shapefile_polylines: Can't open shapefile
> '/home/matt.flournoy/PECAN/overview/July06/new_shp/USA_county_shps/USA_adms2.shp'
>
> (0)       No shapefile information will be added.
>
> ---
>
> The .shp, .shx, and .dbf files are all in the same directory
> (.../USA_county_shps/), and all of them have the "USA_adm2" prefix.
>
> Thanks,
>
> Matt
>
> On Thu, Jun 2, 2016 at 4:29 PM, Rick Brownrigg <brownrig at ucar.edu> wrote:
>
>> Hi Matt,
>>
>> The error says "...can't open shapefile...", so I'm not sure its a
>> projection issue. Are you absolutely positive you've got the correct path?
>> And you have the requisite 3 files at that path -- the .shp, the .shx, and
>> the .dbf file,  all with the same "USA_adm2" prefix.
>>
>> Rick
>>
>> On Thu, Jun 2, 2016 at 2:56 PM, Matt Flournoy <mflournoy37 at gmail.com>
>> wrote:
>>
>>> Hi Kacie!!
>>>
>>> Thanks for the suggestions. I tried gsn_add_shapefile_polygons, but got
>>> the same error as when I used polylines. I'm not sure how to check the map
>>> projections for the shapefiles, but I'll look into that.
>>>
>>> Thanks!
>>> Matt
>>>
>>> On Thu, Jun 2, 2016 at 3:37 PM, Kacie Shourd <Kacie.Shourd at dri.edu>
>>> wrote:
>>>
>>>> Hi Matty (<3),
>>>>
>>>>
>>>>
>>>> I’ve never plotted shapefiles in NCL before, so bear with me. Looking
>>>> at your code, I would suggest you try using gsn_add_shapefile_polygons like
>>>> you use gsn_add_shapefile_polylines. Similar to how you are attempting to
>>>> add the road polylines, try to add the polygons in this way as well?? The
>>>> map you are calling in the create_SD_map function you have defined doesn’t
>>>> draw these as far as I can tell.
>>>>
>>>>
>>>>
>>>> Another thing to check would be that your map projections are matching
>>>> between the shapefiles and the map you have called using NCL.
>>>>
>>>>
>>>>
>>>> Hopefully this helps, or someone else can guide you further.
>>>>
>>>>
>>>>
>>>> Best,
>>>>
>>>> Kacie
>>>>
>>>>
>>>>
>>>> ---
>>>>
>>>> Kacie N. Shourd
>>>>
>>>> 드림
>>>>
>>>>
>>>>
>>>> Graduate Research Assistant
>>>>
>>>> Desert Research Institute
>>>>
>>>> Kacie.Shourd at dri.edu
>>>>
>>>> Work: (775) 674-7049
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> *From:* ncl-talk-bounces at ucar.edu [mailto:ncl-talk-bounces at ucar.edu] *On
>>>> Behalf Of *Matt Flournoy
>>>> *Sent:* Thursday, June 02, 2016 12:59 PM
>>>> *To:* ncl-talk at ucar.edu
>>>> *Subject:* [ncl-talk] shapefile woes
>>>>
>>>>
>>>>
>>>> Hi all,
>>>>
>>>>
>>>>
>>>> I'm trying to plot a simple map of a few counties and roads in South
>>>> Dakota using NCL 6.3.0. To do this, I've downloaded USA county shapefiles
>>>> (from "http://www.gadm.org/country") and SD road network shapefiles
>>>> (from "http://download.geofabrik.de/north-america.html"). Then, I use
>>>> gsn_add_shapefile_polylines to add the USA counties to an existing map in
>>>> my code, but I get this error message:
>>>>
>>>>
>>>>
>>>> (0) Error: gsn_add_shapefile_polylines: Can't open shapefile
>>>> '/home/matt.flournoy/PECAN/overview/July06/new_shp/USA_adm_shp/USA_adm2.shp'
>>>>
>>>> (0)       No shapefile information will be added.
>>>>
>>>>
>>>>
>>>> I get the same error if I try inputing the road network shapefile,
>>>> except that the directory in the first error message is the directory where
>>>> the road network shapefile is. The map is plotted when I run the code, but
>>>> the shapefile information is not on them.
>>>>
>>>> Does anyone know what may be causing this issue? I've attached the code
>>>> that I'm using, which is very similar to the NCL example online about
>>>> reading in USA county shapefiles from the same site as above.
>>>>
>>>> Thank you,
>>>>
>>>> Matt
>>>>
>>>>
>>>>
>>>> --
>>>>
>>>> Matthew Flournoy
>>>>
>>>> M.S. Meteorology Student, University of Oklahoma
>>>>
>>>> B.S. Meteorology, Penn State University
>>>>
>>>> PUBLIC RECORDS NOTICE: In accordance with NRS Chapter 239, this email
>>>> and responses, unless otherwise made confidential by law, may be subject to
>>>> the Nevada Public Records laws and may be disclosed to the public upon
>>>> request.
>>>>
>>>
>>>
>>>
>>> --
>>> Matthew Flournoy
>>> M.S. Meteorology Student, University of Oklahoma
>>> B.S. Meteorology, Penn State University
>>>
>>> _______________________________________________
>>> ncl-talk mailing list
>>> ncl-talk at ucar.edu
>>> List instructions, subscriber options, unsubscribe:
>>> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
>>>
>>>
>>
>
>
> --
> Matthew Flournoy
> M.S. Meteorology Student, University of Oklahoma
> B.S. Meteorology, Penn State University
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mailman.ucar.edu/pipermail/ncl-talk/attachments/20160603/6c78ef54/attachment.html