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This is the map that I tried to georeference using its coordinates, e. g. -98.00 E and 16.00 N

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Both maps are on the same projection. However, no matter what coordinates I enter, they always correspond to a location in the Gulf of Guinea:

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Even though it should be in Mexico!

What am I doing wrong?

I'm new to QGIS.

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    Why Gulf of Guinea? Because it's Null Island. See here for details and better understand the background and why you must change CRS as mentioned in the answer by @swiss_knight gis.stackexchange.com/a/383437/88814
    – Babel
    Commented Dec 29, 2022 at 14:28

1 Answer 1

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Maybe you want to change your target CRS to EPSG:4326 because your target coordinates are given in latitudes and longitudes, not as web Mercator coordinates (EPSG:3857) which you are currently using in your "Transformation Settings" window.

As a dummy illustration, this is a PostGIS equivalent of what you are currently doing:

enter image description here

Whereas you want this:

enter image description here

The difference lies in the CRS of the input point. In the first case, it is set to EPSG:3857 and the result on a WGS84 (EPSG:4326) map is in the Gulf of Guinea. But in the second case, the CRS of the input point is EPSG:4326, and well, this is useless, but I kept the reprojection step, it's displayed where it must lie, in central America.

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