# How to generate a lat/long geotiff with grdimage

**URL:** <https://forum.generic-mapping-tools.org/t/how-to-generate-a-lat-long-geotiff-with-grdimage/4780>\
**Category:** Q&A\
**Created:** [April 9, 2024, 12:42am UTC](https://forum.generic-mapping-tools.org/t/how-to-generate-a-lat-long-geotiff-with-grdimage/4780 "2024-04-09T00:42:47Z")\
**Posts on this page:** 1\
**Showing post:** 24

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**Author:** ![mkononets](https://yyz1.discourse-cdn.com/flex047/user_avatar/forum.generic-mapping-tools.org/mkononets/32/4029_2.png) [@mkononets](https://forum.generic-mapping-tools.org/u/mkononets)\
**Post date:** [April 10, 2024, 11:09am UTC](https://forum.generic-mapping-tools.org/t/how-to-generate-a-lat-long-geotiff-with-grdimage/4780/24 "2024-04-10T11:09:49Z")

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I did exactly like I posted above with `01m` data. Those two examples, one assigning CRS using `gdal_edit.py`, the other using `gmt grdedit`. I’ve got exactly the same results, so not posting anything here. `gdal_edit.py` assigned CRS correctly, `gmt grdedit` quietly failed

`gmt grdimage @earth_gebco_01m_p -n+a -Aworld.tiff -J4326` produces error messages like below which seems like gdal errors (gdal seems to be called by `grdimage` internally to produce the .tiff?). However, the resulting images are totally fine.

```auto
ERROR 10: Pointer 'hTransform' is NULL in 'OCTTransform'.

ERROR 10: Pointer 'hTransform' is NULL in 'OCTTransform'.

ERROR 10: Pointer 'hTransform' is NULL in 'OCTTransform'.

More than 1000 errors or warnings have been reported. No more will be reported from now.

```

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