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world map problem

October 15 2008 | 0 comments
Categories: ArcGIS Methods

I am trying to make a map of the world with a top-left corner with longitude starting at -170 degrees and a top-right corner with longitude of 180 + 10 degrees. Hard to explain for a non native speaker. Basically, I want make a world map to cover 360 degrees of longitude but not starting at -180 degrees and not finishing at 180 degrees. How can I do that? If I just adjust the extent of the of my data frame my data gets clipped.

Mapping Center Answer:

If changing the central meridian parameter in your data frame's coordinate system doesn't show the data in the way you are asking, have a look at this question we recently answered:

http://mappingcenter.esri.com/index.cfm?fa=ask.answers&q=454

To change the central meridian property:

Open your data frame's properties and show the Coordinate System tab.  In order to do this, you must be using a projected coordinate system (not just a geographic coordinate system).  Many projected coordinate systems have a central meridian projection parameter that you can edit.  To edit it, click the Modify button, click on the current parameter value and type a new value.   In your case it would be -10 (which would signify 10 degrees west).

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