How can I choose or modify World Mercator projection to display eastern part of Chucotka region in the right part of the map? I have already tried to change the parametr +lon_0, but the map looks like in the picture.
user projection parameters
+proj=merc +lon_0=+10 +k=1 +x_0=0 +y_0=0 +datum=WGS84 +units=m +no_defs
