# Grdtrack problem whit coordinates in 0

**URL:** <https://forum.generic-mapping-tools.org/t/grdtrack-problem-whit-coordinates-in-0/5130>\
**Category:** Q&A\
**Tags:** gmt\
**Created:** [August 1, 2024, 5:11pm UTC](https://forum.generic-mapping-tools.org/t/grdtrack-problem-whit-coordinates-in-0/5130 "2024-08-01T17:11:46Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![camuz](https://avatars.discourse-cdn.com/v4/letter/c/c2a13f/32.png) [@camuz](https://forum.generic-mapping-tools.org/u/camuz)\
**Post date:** [August 1, 2024, 5:11pm UTC](https://forum.generic-mapping-tools.org/t/grdtrack-problem-whit-coordinates-in-0/5130/1 "2024-08-01T17:11:46Z")

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Hello, I have a problem in region=164E/173W/20S/20N or region= 164/193/-16/16. When using the grdtrack in those regions, the sample doesn’t occur after 180°. I can verify this because I excluded the Nan sample from the image, as it shows

 ![test-1](https://canada1.discourse-cdn.com/flex047/uploads/gmt/original/2X/b/b2266045ba886aec7eec33beca223c2f45e65ad7.jpeg)