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I have a CSV file with lat/long coordinates. I also have a custom CRS to center the map on the Indian Ocean. Is there a way for me to force the points to plot on the blank band of the map where the 180 meridian is?

My proj4 string is +proj=eqc +lon_0=90 +datum=WGS84 +units=m +no_defs +lon_wrap=90. +lon_wrap=90 doesn't appear to have done anything.

Blank band around 180 when centered on Indian Ocean


As a temporary solution, I first converted my CSV points to a points shapefile, then rasterized my shapefile at the appropriate resolution. In my case my CSV file contained lat/long coordinates every 1/2 degree, so I set my resolution to be 0.5 map units = 1 pixel, because my projection was in degrees lat/long. My raster wraps with no issues:

fixed raster map

However, as another user noted, this is only a visual solution and doesn't actually solve my original problem.

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  • @iant The question you marked this as a duplicate of was not helpful for me, nor is it a duplicate of my current question, as it applies to vector polygons and not points. You cannot split points in half.
    – srha
    May 10 '17 at 17:11
  • Did you try using the projection in the question
    – Ian Turton
    May 10 '17 at 17:12
  • Yes, unfortunately simply changing the proj4 parameters isn't an easy fix. They are simply points that are in lat/long so I'm not sure why there's an empty band while the rest of it projects correctly.
    – srha
    May 10 '17 at 17:21