How to make a world map centered on the pacific ocean?

[saishikawa]

Hello,

I'm trying to visualize the virus phylogeography and transmissions among South-East Asia and pacific ocean islands (fiji, french polynesia, etc...). I used /data/geoJSON_maps/world.geojson to plot our MCC tree from BEAST. The problem on the result (attached) is that the pacific ocean region is splitted by the international date line and put at both edge of the map, so that there is a lot of lines jumping from the left to right (right to left) on the map. The problem remains if I use the subregion maps, e.g. /data/geoJSON_maps/region_wb_East_Asia_and_Pacific_subunits.geojson.

I want to make a map centered on the pacific ocean. It seems that I need to modify the javascript code generated by SpreaD3, main.js to change the coordinate of the map-center but I'm not clear which points should be modified. I very appreciate if you could give me some comments on this issue.

Best,