# Raster and polar stereographic (x,y) coordinates

**URL:** <https://discourse.gplates.org/t/raster-and-polar-stereographic-x-y-coordinates/296>\
**Category:** Q&A\
**Created:** [13 April 2021 02:34 UTC](https://discourse.gplates.org/t/raster-and-polar-stereographic-x-y-coordinates/296 "2021-04-13T02:34:59Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![wbm06seismo](https://discourse.gplates.org/letter_avatar_proxy/v4/letter/w/5fc32e/32.png) [@wbm06seismo](https://discourse.gplates.org/u/wbm06seismo)\
**Post date:** [13 April 2021 02:34 UTC](https://discourse.gplates.org/t/raster-and-polar-stereographic-x-y-coordinates/296/1 "2021-04-13T02:34:59Z")

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I have a raster file (grd file) for Antarctica in polar stereographic (x,y) coordinates and I would like to import the file. There is any way to import it or do I need to convert this file in Longitude,Latitude format?

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**Author:** ![john.cannon](https://discourse.gplates.org/letter_avatar_proxy/v4/letter/j/3e96dc/32.png) [@john.cannon](https://discourse.gplates.org/u/john.cannon)\
**Post date:** [13 April 2021 02:56 UTC](https://discourse.gplates.org/t/raster-and-polar-stereographic-x-y-coordinates/296/2 "2021-04-13T02:56:46Z")

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Hi Walid,

You can try to import it using `File > Import > Import Raster`. GPlates supports inbuilt raster spatial reference systems (eg, Lambert Conformal Conic) and these should be stored in your `grd` file.