On Sat, Jan 15, 2011 at 8:11 AM, Elizabeth Dodd <[email protected]> wrote: > > > Something like: > > flood_prone=yes > > flood_prone:height=* > > > > Obviously, we'd need to carefully define "height" (is it normally with > > respect to some marker, or with respect to sea level, etc.?) Anyway, > > the idea is that this field would describe under what conditions the > > area (or way) is flood prone. ... > ...we can mark the edge as being inundated at X+4.3metres...
Isn't that exactly what we want in this case? I.e. doesn't the following exactly describe the information that we are recording?: flood_prone=yes flood_prone:observed_river_height=4.3 flood_prone:gauge=Brisbane City Gauge This qualifies the conditions under which the area (or way) is "flood prone" (or actually..."flooded"). > there are generalised standards avail off BOM where floods are > major:moderate:minor, and those terms are defined here > http://www.bom.gov.au/hydro/flood/flooding.shtml#definitions_terminology On that page, I think only the following could be helpful for describing a "flood prone" area: * Observed River Height (see the example above, where you still need to identify the gauge) * "metres above mean sea level or Australian Height Datum (AHD)" So you could also have flood_prone:gauge=Australian Height Datum. _______________________________________________ Talk-au mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk-au
