Problem using geoshow to represent data over geographical map

Hello everyone. I am working with two vectors and a matrix; both vetors represent latitude and longitude.

Latitude goes from 70 to -40 in intervals of -0.25, it's size is 441*1 single.

Longitude goes from -125 to 45 in intervals of +0.25, it's size is 681*1 single (I have also tried with flipud for it to go from 45 to -125).

The matrix size is 681*441 double, and it has values of temperature in the region. I can plot the data easily ignoring latitude and longitude and using contourf; however, I want to put the data over a map, so that when someone sees it, the association between data and place can be made easily. I am trying to use geoshow for that as:

geoshow(latitude, longitude, matrix'), since mathworks sais: "geoshow(lat,lon,Z) projects and displays the geolocated data grid, Z. In this syntax, lat and lon are M-by-N latitude-longitude arrays. Z is an M-by-N array of class double. You can optionally display the data as a surface, mesh, texture map, or contour by using the DisplayType name-value pair argument."

The closest thing I have come to a solution is using coastline; the problem in this case is that the wole world appears, instead of just the area that I want. I would settle for information on how to remove the parts of the map that don't concern me.

The message I recive is the following: "Warning: Error creating or updating Surface Error in value of property ZData Array is wrong shape or size "

Can someone please tell me the propper way to represent my data?

Thank you very much.