title: Hi, I have problems to make proj4string projection(raster())
body: <p>I have problems to make proj4string  projection(raster())
  MY CODE WAS AS THIS</p>
  <pre><code>library(maptools)
  library(rgeos)
  library(raster)
  library(rgdal)
  library(dismo)
  library(mapview)
  lan &lt;- r3_xls
  head(lan)
  coordinates(lan) &lt;- ~lon + lat 
  class(lan)
  head(lan)
  bio &lt;- raster::getData('worldclim', var=&quot;bio&quot;, res=&quot;10&quot;)
  library(usdm)
  v1 &lt;- vifstep(bio)
  v2 &lt;- vifcor(bio, th=0.9)
  v1
  v2
  biom &lt;- exclude(bio, v2)
  plot(biom[[1]])
  points(lan)
  points(lan, cex=0.5, pch=16)
  library(maptools)
  data(wrld_simpl)
  plot(wrld_simpl, xlim=c(65,70), ylim=c(38,39), axes=TRUE,
       col=&quot;light yellow&quot;)
  points(lan, cex=0.5, pch=16)
  R&gt; area_lan &lt;- sf::read_sf(&quot;uzb.shp&quot;)
  R&gt; tm_shape(area_dnipro) + tm_polygons()
  proj4string(lan) &lt;- projection(raster())
  </code></pre>
  <p>Then I got such warning
  Warning message:</p>
  <pre><code>*In proj4string(obj) :
    CRS object has comment, which is lost in output; in tests, see
  https://cran.r-project.org/web/packages/sp/vignettes/CRS_warnings.html*
  </code></pre>
  <p>can somebody help me?</p>