title: Converting projected coordinates into decimals
body: <p>I have the following data set with coordinates in decimals:</p>
  <pre><code>ID     Longitude  Latitude
   1     -93.2552   58.0879
   1     -93.2558   58.0876
   1     -93.2555   58.0873
  </code></pre>
  <p>For a previous project, I projected the coordinates using the following code:</p>
  <pre><code>  library(rgdal)
    coordinates(data) &lt;- c(&quot;longitude&quot;, &quot;latitude&quot;)
    proj4string(data) &lt;- CRS(&quot;+init=epsg:4326&quot;)
    data &lt;- spTransform(data, CRS(&quot;+init=epsg:5321&quot;))
    data&lt;-as.data.frame(data)
  </code></pre>
  <p>Now, I need to re-use the original decimal coordinates. Could anyone tell me how to convert the projected coordinates back into decimal?</p>