title: how to upgrade proj4 for rgdal
body: <p>I use the R packages rgdal and rgeos extensively (currently with R v3.2.2). Recently, on my ubuntu machine (ubuntu v15.10), when I load the rgdal package, I see the following:</p>
  
  <pre><code>&gt; library(rgdal)
  Loading required package: sp
  rgdal: version: 1.0-7, (SVN revision 559)
   Geospatial Data Abstraction Library extensions to R successfully loaded
   Loaded GDAL runtime: GDAL 1.11.1, released 2014/09/24
   Path to GDAL shared files: /usr/local/share/gdal
   Loaded PROJ.4 runtime: Rel. 4.9.1, 04 March 2015, [PJ_VERSION: 491]
   Path to PROJ.4 shared files: (autodetected)
  WARNING: no proj_defs.dat in PROJ.4 shared files
   Linking to sp version: 1.2-1 
  </code></pre>
  
  <p>I have seen on a <a href="http://r-sig-geo.2731867.n2.nabble.com/rgdal-1-0-7-td7588869.html">recent r-sig-geo posting</a> that this is a known issue, and that an update to the rgdal package has been released to fix this issue. However, despite reinstalling the rgdal package, reinstalling gdal and proj4 with the following:</p>
  
  <pre><code>sudo apt-get update &amp;&amp; sudo apt-get install libgdal-dev libproj-dev
  </code></pre>
  
  <p>I see no difference. This problem generates hundreds of warning messages when I use the functions of these packages. </p>
  
  <p>In comparison, on my mac, if I load the rgdal package, I see</p>
  
  <pre><code>&gt; library(rgdal)
  Loading required package: sp
  rgdal: version: 1.0-7, (SVN revision 559)
   Geospatial Data Abstraction Library extensions to R successfully loaded
   Loaded GDAL runtime: GDAL 1.11.3, released 2015/09/16
   Path to GDAL shared files: /usr/local/Cellar/gdal/1.11.3/share/gdal
   Loaded PROJ.4 runtime: Rel. 4.9.2, 08 September 2015, [PJ_VERSION: 491]
   Path to PROJ.4 shared files: (autodetected)
   Linking to sp version: 1.2-0 
  </code></pre>
  
  <p>So there are clearly updates to gdal and proj.4 that are not making it onto my linux machine. </p>
  
  <p>Does anybody have any ideas how I can get the updates?</p>
  
  <p>Thanks!</p>