Using gmaps4rails my long and lat co-ords are out a little and I'm not sure why

Question

I'm setting some locations on the map in my website. I go to google maps and get co-ordinates of the places I want. Then I put these numbers into my longitude and latitude fields to position the marker. I check the map on my site and the markers are out by a small amount and I don't understand it.

I hold the values for longitude and latitude in floats.

this is the difference in location

Here is google maps

and this is where my marker is placed

you can see that its out by a good bit but I have put the longitude and latitude directly from google maps, so it should appear here.

here is my controller code

def show
@store = Store.all
@json = Store.all.to_gmaps4rails do |store, marker|
  marker.infowindow render_to_string(:partial => "/stores/infowindow", :locals => { :store => store})
  marker.json ({:title => store.title})
  marker.json ({:latitude => store.latitude})
  marker.json ({:longitude => store.longitude})
  marker.json ({:street_line_one => store.street_line_one})
  marker.json ({:street_line_two => store.street_line_two})
  marker.json ({:town => store.town})
  marker.json ({:county => store.county})
  marker.json ({:opening_hours=>store.opening_hours})
  marker.json ({:phone_no=>store.phone_no})
  marker.json ({:email=>store.email})
  marker.picture ({
    'picture'=>view_context.image_path("map_marker.png"),
    'width'=>79,
    'height'=>74
    })
end

and here is the model code

class Store < ActiveRecord::Base
  acts_as_gmappable

  attr_accessible :id, :street_line_one, :latitude, :longitude, :street_line_two, :town, :county, :country, :gmaps, :title, :opening_hours, :mainpage_images, :phone_no, :email

  def gmaps4rails_address
      "#{latitude}, #{longitude}"
  end
end

I don't understand why my markers aren't falling in exactly the same place as google maps.

any help is very much appreciated, thanks.

Answer 1

Either:

• use the latest version of the gem where default offset is null

• or: handler = Gmaps.build('Google', { markers: { maxRandomDistance: null } });