[R] R Output and ArcGIS

[Paul Hiemstra]

Steve Murray wrote:
> Dear all,
>
> I've been using R on a Mac to process some data for export to ArcMap GIS (which only runs on Windows). ArcMap seems to require tab-delimited data (my data are in 3 columns), so I've been using the sep="\t" argument. However, this resulted in strange end-of-line characters when displayed on a PC. I looked in the write.table help file to find that eol="\r\n" can be used to get around this problem, and it does indeed prevent these unwanted characters from appearing.
>
> However, the data still aren't properly recognised by ArcMap when created on a Mac (the exact same code works fine from a PC). In ArcMap, when I select 'Display XY Data', the X (Longitude) and Y (Latitude) columns aren't available to select. It's as if Arc isn't correctly interpreting the output from R - this is despite me using col.names=TRUE in the write.table command.
>
> Any light shed on this will be very gratefully received.
>
> Many thanks for your help,
>
> Steve
>
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Hi,

In addition to the other people. If you convert your data in R to one of 
the spatial classes (see the sp-pacakge) you can use the rgdal-package 
to dump these objects to e.g. a shapefile. This can be read by ArcGIS.

As a note, there is a special mailing list for geographic data and R, 
r-sig-geo, which might be a better place to ask these kind of specific 
questions.

good luck!

Paul

-- 
Drs. Paul Hiemstra
Department of Physical Geography
Faculty of Geosciences
University of Utrecht
Heidelberglaan 2
P.O. Box 80.115
3508 TC Utrecht
Phone:  +3130 274 3113 Mon-Tue
Phone:  +3130 253 5773 Wed-Fri
http://intamap.geo.uu.nl/~paul