021G10: converted and uploaded:
021g10_4_0_HD_1480009_1 - single line watercourse
021g10_4_0_HD_1480009_2 - waterbody areas
021g10_4_0_SS_1320049_2 - saturated soil a.k.a. wetland

Rules files used:
HD_1470009_1_Single_line_watercourseRULES.txt
HD_1480009_2_WaterbodyRULES.txt
SS_1320049_2_WetlandRULES.txt

Modified the HD_1480009_2_WaterbodyRULES.txt to uncomment the permanency translation. This allows intermittent water areas (i.e. seasonally exposed sandbanks) to be tagged as something other than plain natural:water.

I don't know the significance of the "french rules" and "outer rules" files.

Sam has added me to the list of viewers for the Google spreadsheets which detail the recommended approach to the Canvec features. I note that single line watercourse is a "don't" but I do not see why we should not add these, and I also noticed other tiles to N of London ON that have these; and very good they look too. So I think NB should have single line watercourses too!

Did a little bit of editing to clip a pre-existing bit of double-line river from 021G10, so learned a couple more JOSM commands.

There are closing lines remaining e.g. at W edge of 021G10, half way across Oromocto Lake. I think the best approach will be to put all the waterbodies in for all tiles, then do another pass to tidy up. I'll try that idea with an adjacent tile, when I have time.

Tomorrow? Maybe some "vegetation" i.e. forest.