title: Changing the Projection of Shapefile
body: <p>I am trying to change or assign the projection of a Germany-Shapefile from <code>NA</code> to <code>+proj=longlat +datum=WGS84 +no_defs +ellps=WGS84 +towgs84=0,0,0</code>, but somehow it doesn't work well.</p>
  
  <p>Reproducible Example:
  Shapefile and other files can be downloaded <a href="https://www.dropbox.com/s/oqofou8dc03udh9/shapefile.zip?dl=0" rel="noreferrer">here</a>:</p>
  
  <p>What I tried is the following:</p>
  
  <pre><code>library(maptools)
  library(sp)
  library(rgeos)
  library(rgdal)
  projection.x &lt;- CRS("+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs +towgs84=0,0,0")
  mapG &lt;- readShapePoly("vg2500_lan.shp", verbose=TRUE, proj4string=projection.x)
  summary(mapG)
  mapG &lt;- spTransform(mapG, CRS("+proj=longlat +ellps=WGS84 +datum=WGS84"))
  </code></pre>
  
  <p>So, the problem is I cannot plot my observations on the map. See below</p>
  
  <p><a href="https://i.stack.imgur.com/KFR3t.png" rel="noreferrer"><img src="https://i.stack.imgur.com/KFR3t.png" alt="enter image description here"></a>
  The ponits were detected using <code>geocode</code> function from <code>ggmap</code> package.
  <a href="https://i.stack.imgur.com/Y4GB9.png" rel="noreferrer"><img src="https://i.stack.imgur.com/Y4GB9.png" alt="enter image description here"></a>
  Any idea how to change the projection of the shapefile or the projection of the google coordinates would be highly appreciated!</p>