Re: [netcdf-java] Subsetting with getRangesFromLatLonRect

• To: Antonio Rodriges <antonio.rrz@xxxxxxxxx>
• Subject: Re: [netcdf-java] Subsetting with getRangesFromLatLonRect
• From: Christian Ward-Garrison <cwardgar@xxxxxxxx>
• Date: Wed, 29 Jul 2015 16:48:47 -0600

Hi Antonio,

There are many longstanding issues concerning grids that cross the date
line, and this is one of them. It's actually a very hard problem to solve
in a way that doesn't break existing clients (e.g. the IDV), but we finally
have a solution for it in the upcoming NetCDF-Java v5.0. Until then,
hopefully you can work around the date line weirdness.

Cheers,
Christian

On Mon, Jul 27, 2015 at 6:27 AM, Antonio Rodriges <antonio.rrz@xxxxxxxxx>
wrote:

> Hello,
>
> Am I doing smth wrong? -
>
> When I call GridCoordSystem.getRangesFromLatLonRect
> I always get two-element List<Range> regardless of whether the given
> LatLonRect crosses dateline or not.
>
> There are some datasets with longitudes 0..360 and others with
> -180..-180, so we have index breaks at 0 and +/-180 correspondingly.
> When I call getRangesFromLatLonRect for box containing 0 it returns me
> the range for values > 0 and if crossing +180 it returns range
> containing positive lons < 180.
>
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  • [netcdf-java] Subsetting with getRangesFromLatLonRect
    • From: Antonio Rodriges