Working near the dateline
If you read the previous recipe about custom projections, you might have noticed the note about data that crosses the edge of projections and how it doesn't usually render properly. When working on data near -180 or 180 degrees longitude, you are going to have this issue. Maps showing far Eastern Russia, Fiji, New Zealand, and the South Pacific, to name a few places, will often contend with this issue.
The required solution really depends on what you're trying to do. If you just need a map of such areas, pick a locally suitable projection. If you have existing data from other sources, it may be cut along the edge and you might need to stitch it back together. As for worldwide maps, sometimes you have to trim .01 degrees of the edge of your data so that it doesn't display oddly.
Getting ready
To follow this recipe, you will need the honolulu-flights.shp layer and the SpatiaLite database new-zealand.sqlite from the sample data.
How to do it…
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