[R-sig-Geo] Can't import precise GPS data

Barry Rowlingson b.rowlingson at lancaster.ac.uk
Mon Oct 6 20:03:25 CEST 2008

2008/10/6 Andrew Rayburn <drew.rayburn at aggiemail.usu.edu>:
> My problem is that I can't import precise (to 3 decimal places) Northing and
> Easting coordinates into R.  The data were taken on a ProMark3 GPS unit,
> with the intent of obtaining extremely precise GPS coordinates.
> Post-processing was done correctly, and the resulting Northings and Eastings
> were to 3 decimal places.  However, every attempt I've made to import them
> into R (scan, read.table, read.delim, read.dbf via FOREIGN package, and I
> also the tried maptools package) results in the exact same thing - the
> Northings column is shown to 1 decimal place, and the Eastings column has no
> decimal places.  In other words, I read in the data using one of many
> different import options, and then view the data after import - and all the
> precision has been eliminated.
> Has anyone else encountered this problem, and/or can anyone offer a
> solution?  I've spend an inordinate amount of time on this problem, with no
> luck.

 I suspect we'll need to see the file you are trying to import - or at
least part of it. It's possible that R is only *displaying* few
decimal places, controlled by options(digits=...), but that sounds

 Post a bit of your file and then we can have a look....


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