What parameters should I use in a Google Maps URL to go to a lat-lon?

This should help with the new Google Maps:

https://maps.google.com/maps/place/<name>/@<lat>,<long>,15z/data=<mode-value>

• The place adds a marker.
• name could be a search term like "realtors"/"lawyers".
• lat and long are the coordinates in decimal format and in that order.
• 15z sets zoom level to 15 (must be between 1 ~ 20).
• You can enforce a particular view mode (map is default) - earth or terrain by adding these:
  • Terrain: /data=!5m1!1e4
  • Earth: /data=!3m1!1e3

E.g.: https://www.google.com/maps/place/Lawyer/@48.8187768,2.3792362,15z/data=!3m1!1e3

References:
https://moz.com/blog/new-google-maps-url-parameters http://dddavemaps.blogspot.in/2015/07/google-maps-url-tricks.html

This is current accepted way to link to a specific lat lon (rather than search for the nearest object).

http://maps.google.com/maps?z=12&t=m&q=loc:38.9419+-78.3020

• z is the zoom level (1-20)
• t is the map type ("m" map, "k" satellite, "h" hybrid, "p" terrain, "e" GoogleEarth)
• q is the search query, if it is prefixed by loc: then google assumes it is a lat lon separated by a +

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

In May 2017 Google announced the Google Maps URLs API that allows to construct universal cross-platform links. Now you can open Google maps on web, Android or iOS using the same URL string in form:

https://www.google.com/maps/search/?api=1&parameters

There are several modes that you can use: search, directions, show map and show street view.

So you can use something like

https://www.google.com/maps/search/?api=1&query=58.698017,-152.522067

to open map and place marker on some lat and lng.

For further details please refer to:

https://developers.google.com/maps/documentation/urls/guide