I have saved Google Maps image (not Google Earth) of area at latlon(17.692437,83.218689) by some method in jpeg format. It is an exact snapshot of the Google Maps. Now I need to geo-reference it to use it as base map for my digitization. What projection or coordinate system shall I use? Some says its WGS-84 Mercator projection. But I see no Mercator projection in GCS list in ArcGIS. Please help! I am confused.
I want to georeference it by assigning exact latlon values to the points as in google maps.
Extend : Now I got another question. Is Google Maps in Projected Coordinate system or Geographic Coordinate system. Though it displays LatLon values, I think it is projected coordinate system. Am I right?
I set the projection of ArcMap Dataframe to Projected Coordinate System ( Web Mercator) and changed the display values from Meters to Decimal Degrees. Then I added the Google Map with no geo-referenced data to dataframe. Then I took some common control points in my ArcMap image and Google Maps, set the Latitude and Longitude values from Google Maps in ArcMap image points, After assigning latlon values to 4 points, I click on update georeferencing. Then my image is transformed very strange. Is the procedure I did correct?