Setting the centre of a world map to the international dateline

[Ian Chivers]

I've attached a pdf of a map of tsunami events and I wondered if it is possible to have the centre of the plot as the international date line, as tsunami events occur most frequently in the Pacific Ocean and Pacific rim.

[Helmut Michels]

Dear Ian,

if you scale the X-axis from 0.0 to 360.0, the international date line (180.0) will be located at the center of the X-axis.

For cylindrical equidistant projections, the scaling parameters in GRAFMP for the X-axis  can be in the range of -540 to 540

(see PROJCT).

With best regards,

Helmut

[Ian Chivers]

Thanks very much.

Ian

[Ian Chivers]

Thanks again. I've attached an updated gif and pdf. I had to adjust the latitude/longitude

pairs for the events of the west coast.