[R-sig-Geo] rgdal readOGR() problem

[Roger Bivand]

On Thu, 28 Jan 2016, Philip Greenwood wrote:

> I am trying to compute distance spatial weight matrices using rgdal. 
> This works fine in my local test system, but when I deploy my code to 
> our production system I receive the following error when readOGR is 
> executed:
>
> Source: "/tmp/geojson_writer2529085113493086718.json", layer: "OGRGeoJSON"
> with 195 features
> It has 26 fields, of which 1 list fields
> Error : length(fldnms1) == nflds is not TRUE

Pleaase run traceback() after the error.

Please run ogrInfo() on both systems, and compare the output.

Please check that GDAL is the same version on both systems (I guess it 
isn't - if the file is the same on both systems, it is the only other 
variable element). The GDAL version can be shown by:

getGDALVersionInfo()

and compare with:

getGDALCheckVersion()

to ensure that rgdal was installed using the same version as the GDAL 
shared object that is loaded (this is shown when rgdal is loaded unless 
startup messages are suppressed).

If you check the source code - traceback() shows which function to look in 
- you'll see that this is about the names of list fields (data fields that 
include a list of fields of the same type). Does your input file include 
such list fields?

Hope this helps,

Roger

>
> Any ideas about what the error means?
>
> My local system and the production system are using the same version of 
> rgdal. Here is the sessionInfo for the system that is having trouble:
>
>> sessionInfo()
> R version 3.1.3 (2015-03-09)
> Platform: x86_64-redhat-linux-gnu (64-bit)
> Running under: CentOS release 6.5 (Final)
>
> locale:
> [1] LC_CTYPE=en_AU.UTF-8       LC_NUMERIC=C
> [3] LC_TIME=en_AU.UTF-8        LC_COLLATE=en_AU.UTF-8
> [5] LC_MONETARY=en_AU.UTF-8    LC_MESSAGES=en_AU.UTF-8
> [7] LC_PAPER=en_AU.UTF-8       LC_NAME=C
> [9] LC_ADDRESS=C               LC_TELEPHONE=C
> [11] LC_MEASUREMENT=en_AU.UTF-8 LC_IDENTIFICATION=C
>
> attached base packages:
> [1] grid      stats     graphics  grDevices utils     methods   base
>
> other attached packages:
> [1] log4r_0.2          PBSmapping_2.69.76 rgeos_0.3-8        gpclib_1.5-5
> [5] maptools_0.8-36    gdata_2.16.1       RJSONIO_1.3-0      spdep_0.5-88
> [9] Matrix_1.1-5       rgdal_0.9-2        sp_1.1-0           Hmisc_3.16-0
> [13] ggplot2_1.0.1      Formula_1.2-1      survival_2.38-1    lattice_0.20-30
> [17] psych_1.5.4        classInt_0.1-22
>
> loaded via a namespace (and not attached):
> [1] acepack_1.3-3.3     boot_1.3-15         class_7.3-12
> [4] cluster_2.0.1       coda_0.17-1         colorspace_1.2-6
> [7] deldir_0.1-9        digest_0.6.8        e1071_1.6-4
> [10] foreign_0.8-63      gridExtra_0.9.1     gtable_0.1.2
> [13] gtools_3.4.2        latticeExtra_0.6-26 LearnBayes_2.15
> [16] magrittr_1.5        MASS_7.3-39         mnormt_1.5-2
> [19] munsell_0.4.2       nlme_3.1-120        nnet_7.3-9
> [22] parallel_3.1.3      plyr_1.8.2          proto_0.3-10
> [25] RColorBrewer_1.1-2  Rcpp_0.11.6         reshape2_1.4.1
> [28] rpart_4.1-9         scales_0.2.4        splines_3.1
>
> Thanks.
> Phil
>
> ---
> Philip Greenwood
> Senior Software Developer
> Australian Urban Research Infrastructure Network (AURIN)
> Level 2 West, Alice Hoy Building, University of Melbourne
> T: +61-(0)3-9035-8549
> E: philip.greenwood at unimelb.edu.au
>
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>

-- 
Roger Bivand
Department of Economics, Norwegian School of Economics,
Helleveien 30, N-5045 Bergen, Norway.
voice: +47 55 95 93 55; fax +47 55 95 91 00
e-mail: Roger.Bivand at nhh.no
http://orcid.org/0000-0003-2392-6140
https://scholar.google.no/citations?user=AWeghB0AAAAJ&hl=en
http://depsy.org/person/434412