[talk-au] Brisbane Flooding on NearMap

[waldo000000 at gmail.com]

On Sat, Jan 15, 2011 at 8:11 AM, Elizabeth Dodd <edodd at billiau.net> 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.