[HOT] HOT/HDM web rendering

[Eric SIBERT]

Hi all,

 > It's time to introduce the work being done on a humanitarian (HDM)
 > specific rendering.
 >
 > TL;DR: http://umap.fluv.io/en/map/hdm-first-draft_728

It is a pleasure to discover this work.

So, i decided to have a close look at the HDM. And also compare to the 
MDM (my Madagascar Data Model :-p ) that I just updated:

http://wiki.openstreetmap.org/wiki/FR:WikiProject_Madagascar#.C3.89l.C3.A9ments_courants.2C_sp.C3.A9cifiques_ou_utiles_.C3.A0_Madagascar

I'm a little bit surprise by the large number of elements in the HDM. I 
was expecting it to focus on specific aspects of humanitarian. 
golf_course? motorcycle parking? pub, biergarten, brothel... More 
generally, with JOSM presets, I don't understand the need to duplicate 
objects that already exists in default presets.

Concerning the roads:
- for smoothness, you define it as other or under 40 km/h. It's not in 
accordance with wiki which is talking about the kind of vehicle that may 
use the road.
- but you also added practicability:*=. There was already attempts to 
define smoothness or whatever for different type of vehicle. Maybe, we 
have to try again.
In Madagascar, for path (or damaged road), they also use wheelbarrow to 
carry goods. I don't know how to indicate it. practicability:wheelbarrow=?
- one can also conditional restrictions:
smoothness=horrible
smoothness:conditional=very_horrible @ Dec-Apr
i.e. 4wd from May to November and "charrette à zébu" from December to April.
- I'm also using seasonal=yes(/no) in conjunction with 
access:conditional=no @ Dec-Apr for instance to indicate that the road 
is seasonal and that it is usually closed from December to April. I 
would appreciate to see at least the seasonal aspect on rendering (color 
is already used for surface, shape for smoothness...).

For river crossing, I'm using two cases.
- if the road is usually flooded: ford=yes
- if the road is usually dry: flood_prone=yes
Indicating the surface is also important. After a cyclone, it should be 
easier to cross a river if the corresponding part of the road is made of 
concrete instead of ground.
It is interesting to see river crossing in render even more important 
than bridges. By a quick look at the map, you may answer questions like:
how many rivers to cross?

Where is dispensary?
Also, in the "Proposed features/Healthcare 2.0", it is not easy to see 
the limit between health_facility:type dispensary and health_centre.


Eric