Have done a lot of work on cliff lines along the Wolgan River and Capertee Valley Canyon.

HELP please - the Wollemi National Park Boundary is no longer showing. FIXED 7 Apr 16

I have added a note. This is a large park and it has just disappeared in the last couple of weeks I believe. I don’t have the skills to fix this.

The boundary is shown on the LPI NSW Base Map which can appear as a layer.

Out of interest this is widely reported to be the second largest canyon (in terms of width) in the world but the map was pretty poor. OSM contours are problematic, I understand that OSM uses NASA’s Shuttle Radar Topography Mission (SRTM) data for contours. The Space Shuttle radar was only sensitive to about 30 metres, so any cliff smaller than 30m will not show on the map. But many of these cliffs are over 200m tall, and some almost 300m tall and they still don’t show up on the contour maps.

So to compensate I have been adding cliff lines and canyon names where they exist.

I cleaned up the Kirribilli foreshore, mostly from local knowledge and aerial imagery. My GPS traces were problematic, wild variation. I walk this section of shoreline every week, sometimes almost every day so I know it very well.