[ncl-talk] shapefile woes

Fri Jun 3 10:52:49 MDT 2016

Hi Rick,

The path may have been the original issue and why I wasn't getting a file
extension error, because NCL couldn't find the file in the first place. So
that's relatively embarrassing. But now I'm sure I have the correct path.
I've attached the shapefiles that I'm using. USA_adm_shp.zip contains the
shapefiles with USA county borders, and south-dakota-latest.shp.zip
contains shapefiles with South Dakota road networks.

Thanks,
Matt
 USA_adm_shp.zip
<https://drive.google.com/file/d/0BxjU3NJc2C4dTFVBMWowREw4LVU/view?usp=drive_web>

 south-dakota-latest.shp.zip
<https://drive.google.com/file/d/0BxjU3NJc2C4dTFg1SFZTT2c3UXM/view?usp=drive_web>

On Fri, Jun 3, 2016 at 9:05 AM, Rick Brownrigg <brownrig at ucar.edu> wrote:

> 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
>>>>
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>>>>
>>>
>>
>>
>> --
>> Matthew Flournoy
>> M.S. Meteorology Student, University of Oklahoma
>> B.S. Meteorology, Penn State University
>>
>
>

-- 
Matthew Flournoy
M.S. Meteorology Student, University of Oklahoma
B.S. Meteorology, Penn State University
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