[AccessD] OT: Dynamic GoogleMaps pinned location on html pages - how to

Hi All,

I'm trying to find information how to get placed on my web page(s) a pinned
location from dynamic GoogleMaps - as this test one:

http://smsconsulting.spb.ru/test/TestGoogle.txt.html

which has this src link:

src="http://maps.google.ru/maps/ms?ie=UTF8&hl=ru&s=AARTsJokgBf8bongi
1OchWGwlaTMZzXqzA&msa=0&msid=113349423880744472763.000454cb5e67778af
29cb&ll=59.907749,30.483027&spn=0.015062,0.036478&z=14&outpu
t=embed"

which I "borrowed" for testing purposed from one of the site.

I can't find information what in the above src link are the following
attributes:

msid = ?
s = ?
spn = ?
z = ?

What are the other attributes is clear.

I guess the needed information should be somewhere in GoogleMaps API docs
but I can't find it.

msid = ? and s = ? seems to be some IDs/codes are these freely available
from google as e.g. Google Search API and GoogleMAPs API keys?

Thank you.

--
Shamil