[ncl-talk] Unable to read shapefile attribute table correctly

[Dave Allured - NOAA Affiliate]

Never mind, it looks like you already used one of the print statements to
find that COMID is a defined file variable.

--Dave

On Tue, Aug 5, 2014 at 3:19 PM, Dave Allured - NOAA Affiliate <
dave.allured at noaa.gov> wrote:

> Peirong,
>
> You should start debugging something like this with printVarSummary (f)
> and print(f), not getfilevarnames (f).
>
> --Dave
>
>
> On Tue, Aug 5, 2014 at 3:13 PM, Peirong Lin <peironglinlin at gmail.com>
> wrote:
>
>> Dear NCL,
>>
>> I am using the following NCL code to read a shapefile attribute table
>> (which allows further computation), but when I printed out all the
>> "COMIDs", they are all "0". But when I open the shapefile in ArcGIS, the
>> COMIDs can be correctly shown. Can anybody provide some hints to resolve
>> this?
>>
>>
>> *begin*
>>
>> *shp_file        = "./NHDFlowline.shp"*
>>
>> *f       = addfile(shp_file,"r")*
>>
>> *varnames        = getfilevarnames(f)*
>>
>> *print("varnames = "+varnames)*
>>
>> *COMIDs  = f->COMID*
>>
>> *print(COMIDs)*
>>
>> *end*
>>
>> I've already made sure the COMID is a variable in the shapefile, but the
>> values just cannot be read correctly. Thank you in advance for replying!!
>>
>> Best,
>> Peirong
>>
>>
>> --
>> *Peirong Lin* (Ms.)
>> Graduate Research Assistant (JGB 5.322)
>> Jackson School of Geosciences
>> The University of Texas at Austin
>> Contact: 512-201-3731
>> prlin at utexas.edu; peironglinlin at gmail.com
>>
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>
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