[mapguide-users] re; Google and mapguide scales

[Kori Maleski]

Google Maps scales differ depending on latitude.

Here is a javascript example to roughly gauge the approximate scale based on
the Google Zoom Factor:
i.e. Google Zoom factor of 1 would be approximately 1:204800000


switch(this.map.getZoom())
  {
  case 1:
    sScale = "204 800 000"
    fScale = 204800000

    break;
  case 2:
    sScale = "102 400 000"
    fScale = 102400000

    break;
  case 3:
    sScale = "51 200 000"
    fScale = 51200000

    break;
  case 4:
    sScale = "25 600 000"
    fScale = 25600000

    break;
  case 5:
    sScale = "12 800 000"
    fScale = 12800000
    mousefactor = 0;
    break;
  case 6:
    sScale = "6 400 000"
    fScale = 6400000

    break;
  case 7:
    sScale = "3 200 000"
    fScale = 3200000

    break;
  case 8:
    sScale = "1 600 000"
    fScale = 1600000

    break;
  case 9:
    sScale = "800 000"
    fScale = 800000

    break;
  case 10:
    sScale = "400 000"
    fScale = 400000

    break;
  case 11:
    sScale = "200 000"
    fScale = 200000

    break;
  case 12:
    sScale = "100 000"
    fScale = 100000

    break;
  case 13:
    sScale = "50 000"
    fScale = 50000
        break;
  case 14:
    sScale = "25 000"
    fScale = 25000

    break;
  case 15:
    sScale = "12 500"
    fScale = 12500

    break;
  case 16:
    sScale = "6 250"
    fScale = 6250

    break;
  case 17:
    sScale = "3 125"
    fScale = 3125
    break;



  }



Again this is just for a rough approximation.  MapGuide Maestro's MgCooker
can generate or seed tiles.



Cheers,






On Sun, Apr 19, 2009 at 11:13 AM, girish kumar bv
<girish778 at rediffmail.com>wrote:

> Hi,
>
> Can anyone help me out in relating mapguide scales with those of google
> maps scale.
>
> Is it possible to generate tiles automatically for all scale ranges in
> mapguide studio, in our apps we are suppose to generate tiles from the
> composed  thematic map .
>
> Is there an apps to generate tiles from thematic layer of mapguide studio
> corresponding to google map scales.
>
> Any help is appreciated.
>
> regards,
> girish
>
>
> <http://sigads.rediff.com/RealMedia/ads/click_nx.ads/www.rediffmail.com/signatureline.htm@Middle?>
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