title: Plotting of coordinates in R
body: <p>I have a number of coordinates and I want to plot them in a gridded interface by using R.
  The problem is that the relative distance between observations is large. Coordinates are in a geographic coordinate system and the study area is Switzerland. Moreover, id of the points is required to be plotted. </p>
  
  <p>The problem is that two clusters of the points are dense and some other points are separated with a large distance. How I can plot them in a proper way to have readable presentation? Any suggestion for plotting the data? </p>
  
  <p>Preferably, do not use <code>ggplot</code> as I used it before and it did not present proper results.</p>
  
  <p>Data:</p>
  
  <pre><code>id x y
  2 7.1735 45.86880001
  3 7.17254 45.86887001
  4 7.171636 45.86923601
  5 7.18018 45.87158001
  6 7.17807 45.87014001
  7 7.177229 45.86923001
  8 7.17524 45.86808001
  9 7.181409 45.87177001
  10 7.179299 45.87020001
  11 7.178359 45.87070001
  12 7.175189 45.86974001
  13 7.179379 45.87081001
  14 7.175509 45.86932001
  15 7.176839 45.86939001
  17 7.18099 45.87262001
  18 7.18015 45.87248001
  19 7.18122 45.87355001
  20 7.17491 45.86922001
  25 7.15497 45.87058001
  28 7.153399 45.86954001
  29 7.152649 45.86992001
  31 7.154419 45.87004001
  32 7.156099 45.86983001
  GSBi_1 7.184 45.896
  GSBi__1 7.36 45.901
  GSBj__1 7.268 45.961
  GSBj_1 7.276 45.836
  GSB 7.272 45.899
  GSB_r 7.166667 45.866667
  </code></pre>
  
  <p>Location of points:</p>
  
  <p><img src="https://i.stack.imgur.com/TXZqs.png" alt="enter image description here"></p>
  
  <p>As you can see in the plot, the points' ids are not readable both for the dense parts and others.</p>