[PROJ] setting default transformation NAD83 CSRS to / from NAD83 Original

[Travis Kirstine]

Hi All,

I've been struggling with trying to set proj to use ca_nrc_ON27CSv1.tif grid as the default transformation when transforming between UTM NAD83 CSRS (epsg:2958) and UTM NAD83 (epsgL26917) Original.

In the past I've specified the +nadgrids=./ON83CSv1.gsb in the cs2cs command but was hoping that I could just set the default value in the proj.db to apply the gridshift.

Is this possible?  I've run the projsync to pull the new version of the grid but still no luck.

Regards
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