title: Why is PostGIS stacking all points on top of each other? (Using ST_DWithin to find all results within 1000m radius)
body: <p>New to PostGIS/PostgreSQL...any help would be greatly appreciated!</p>
  
  <p>I have two tables in a postgres db aliased as gas and ev. I'm trying to choose a specific gas station (gas.site_id=11949) and locate all EV/alternative fuel charging stations within a 1000m radius. When I run the following though, PostGIS returns a number of ev stations that are all <strong>stacked on top of each other in the map</strong> (see screenshot). </p>
  
  <p>Anyone have any idea why this is happening? How can I get PostGIS to visualize the points within a 1000m radius of the specified gas station? </p>
  
  <pre><code>with myplace as (
    SELECT gas.geom 
    from nj_gas gas 
    where gas.site_id = 11949 limit 1)
  select myplace.*, ev.* 
  from alt_fuel ev, myplace 
  where ST_DWithin(ev.geom1, myplace.geom, 1000)
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/JAYtJ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/JAYtJ.png" alt="enter image description here"></a></p>