Collected Hints, Difficulties and Issues with ISOM2017 Symbol Conversions


This page was installed by Convenor of the ONZ Mapping Committee, and last updated on 29 May 18. It consists of snippets harvested from mapper discussions from 2018. Just a temporary page and not a pretty one, we'll revise or supplement the ONZ website stuff in due course. Send us your successes, failures, by email or posting on Maptalk.

Recent additions: Finding all the slope ticks that need to be changed; symbols that are no longer available; yellow might be too bright on farm maps. Latest items are at the top of each section.

Small detailed things that need a tooth-comb inspection

  • Michael W: When changing form-line slope ticks in sand-dune terrain, even with Dave Fisher's trick below I still miss some. I temporarily change the formline tag to another colour to make them stand out from tags not to be changed. If you have "auto select symbol" in your preferences as I have, then dragging a window round two or more to be changed reduces the number of clicks.
  • Michael: Here's a list of symbols that disappear. Requires human (as opposed to automatic) action. Firing range, Grave, Boulder field type B, Blue cross. My CRT changes these into a fat purple line or a First Aid cross so I can inspect and deal. The grave is the one I miss, am discussing with some others what to do with graveyards at ISOM scales - perhaps a cairn.
  • Linley: Was having trouble with converting the PAPO logo with non-standard symbols and colours. Decided that its easier to delete before map conversion; and to import a redrawn logo afterwards.
  • Selwyn: The thinner slope lines for form lines need to be changed one by one. Took a couple of hours for Temu Rd map. Still to do Hedley Dunes. Michael W: You could take the opportunity to put a dash point in the form lines at the slope tick, it looks nicer than having a gap there. Dave Fisher: Hide all symbols except formlines and both types of slope tags, that makes it easier to see them.
  • Michael W: Depending on your conversion routine (OCAD 12, or using a CRT) water body blue might be converted into "water-body with a border". Down the track you'll be trying to edit a lake and wondering why there are two borders. You could possibly get a border across a river:-))
  • Selwyn: We had used some of our own symbol numbers; a blue track hidden symbol for old m/c tracks no longer visible enough. Our symbol number happened to be the same as the new number for a track with yellow background. Took a visit by course planner to spot it. Similar occurrence with old-style slope ticks made with contour symbol. Michael W: for your own "special" symbols I recommend a number like xxx.900 to keep clear of future IOF number changes.
  • Malcolm Ingham: Small earth banks upside down. Can occur when early mappers have created their own symbols "the other way up".
  • Michael W: I think the fence ticks slope the other way don't they? (Mr OCAD claimed they went the "wrong" way before!) Only an occasional problem where the tick now pokes into some tight detail. A dash point will adjust the tick positions.
  • Michael W: North line spacing now 300m I think. We should really change the grid spacing, and if the map has north lines in it, regenerate them and re-examine the result for places which might call for gaps.

Broader map-wide issues

  • Michael W: The new yellow has 20% more "Y" in the CMYK recipe, so mostly-farmland maps may look too bright. The new symbol set provides a reduced yellow (75%) but it may still be too bright. See item below about maintaining the distinction between 401 and 403 yellows.
  • Michael C: All maps should be clearly marked to indicate the mapping standard used.
  • Selwyn: Have done a test print with our printer and colours look okay which is exactly what should happen because they use a Fuji Versant 3100 as suggested by IOF. Michael W: Ken Dowling an ex-kiwi who lives in Australia and has also owned a printery, has done some printing experiments with new colours set up by OCAD to go with ISOM2017. Here are his conclusions.
  • Michael W: My impression from looking at the CMYK numbers is that the new colours may be more intense (higher CMYK numbers) That could be good. Except perhaps for olive green?
  • Michael W: If you've used a cut-down yellow for farmland maps, you may have ALSO cut down pale yellow. The new OCAD default lacks a cut-down PALE yellow (eg 30%) and there may be insufficient contrast between symbol 401 and 403. Numbers for new colours (or for new symbols for that matter) - see suggestions in www.mapsport.co.nz/OHVISOM2017symbolextensions.html to keep clear of numbers that OCAD might use.
  • Jim: The asterisk symbol was introduced to give a clear distinction between a tree and water trough on a yellow background. So far, so good, but if a water trough is on a fenceline (shared between two paddocks) the symbol may be hidden by the black fenceline. A solution is to create a new blue colour (above black) for and use it for water troughs
  • Selwyn: Our course planners/controllers are still pondering the course setting symbols. I think they were released in January which didnít give much time for us to come to grips with. Michael W: feel that's a matter for the TC, we've got enough to do.
  • Michael W: It may have been lost in the mists of time, but many maps have undersize symbols and conversion will enlarge them. (Eg dot knolls and U depressions in sand dunes) If you're seeing overlap and/or insufficient gaps, you're in for a painful dot-by-dot tweaking. Neil Barr (Oz MC Convenor) says many mining terrains are going to have to be re-mapped..