diff --git a/doc/rst/source/explain_-Jproj_full.rst_ b/doc/rst/source/explain_-Jproj_full.rst_
index d5e31789d36..55f8d42bf05 100644
--- a/doc/rst/source/explain_-Jproj_full.rst_
+++ b/doc/rst/source/explain_-Jproj_full.rst_
@@ -10,8 +10,7 @@
    **-J**\ "*+proj=merc +ellps=WGS84 +units=m*\ " or just glue all parameters like in
    **-J**\ *+proj=merc+ellps=WGS84+units=m*.
 
-   Using `EPSG codes <https://spatialreference.org>`_ is also possible (but need the setting of the **GDAL_DATA**
-   environment variable to point to the GDAL's *data* sub-directory). For example **-JEPSG:4326** sets
+   Using `EPSG codes <https://spatialreference.org>`_ is also possible. For example **-JEPSG:4326** sets
    the WGS-84 system.
 
    For :doc:`mapproject </mapproject>` and :doc:`grdproject </grdproject>` we can go directly from the