yeah I had the same question for a long time and I found the perfect one. here are some parameters from it.
https://maps.google.com?parameter = value
q=
is used to specify the search query in Google maps search.
eg :
https://maps.google.com?q=newyork or
https://maps.google.com?q=51.03841,-114.01679
near=
is used to specify the location alternative to q=
. Also has the added effect of allowing you to increase the AddressDetails Accuracy value by being more precise. Mostly only useful if query is a business or suchlike.
z=
Zoom level. Can be set 19 normally, but in certain cases can go up to 23.
ll=
Latitude and longitude of the map centre point. Must be in that order.
Requires decimal format. Interestingly, you can use this without q, in
which case it doesn’t show a marker.
sll=
Similar to ll, only this sets the lat/long of the centre point for a business search. Requires the same input criteria as ll.
t=
Sets the kind of map shown. Can be set to:
m – normal map,
k – satellite,
h – hybrid,
p – terrain
saddr=
Sets the starting point for directions searches. You can also add text into this in brackets to bold it in the directions sidebar.
daddr=
Sets the end point for directions searches, and again will bold any text added in brackets.You can also add "+to:" which will set via points. These can be added multiple times.
via=
Allows you to insert via points in directions. Must be in CSV format. For example, via=1,5 addresses 1 and 5 will be via points without entries in the sidebar. The start point (which is set as 0), and 2, 3 and 4 will all show full addresses.
doflg=
Changes the units used to measure distance (will default to the standard unit in country of origin). Change to ptk for metric or ptm for imperial.
msa=
Does stuff with My Maps. Set to 0 show defined My Maps, b to turn the My Maps sidebar on, 1 to show the My Maps tab on its own, or 2 to go to the new My Map creator form.
dirflg=
can set miscellaneous values below:
h - Avoid highway
t - Avoid tolls
reference
http://moz.com/ugc/everything-you-never-wanted-to-know-about-google-maps-parameters
q=
withll=
andz=
is the ONLY way I've gotten lat/lon to work with a zome factor. – Pleinair