Hello there, Should the limit for a road perhaps be the width of a vehicle and
under for a path? (A Land Rover's roughly 2m wide). There's a scale on JOSM and
ID. Couldn't see one on Potlatch.
Andy
On Monday, 13 June 2016, 17:48, Chad Blevins <[email protected]> wrote:
Hi John,
You're absolutely correct. When Courtney and I created theMozambique Tracing
Guide the original tasks were urban focused, and the scopehas changed to rural
areas. Currently agroup of interns are mapping those districts and I've had
severalinquiries about road classifications. Theguidance I’ve given is to tag
all rural roads as unclassified unless they are clearlylabeled/numbered as a
“major” road, or very small pathways.
The Africa roads wiki is great and was referenced whencreating the Mozambique
guide. Many road examples in this part of theworld are debatable as
"unclassified", "tracks", or"paths". It’s almostimpossible to know the use and
in some cases classifications may change basedon time of year. A subset of
internscopied here (Forrest, Julia, and Alex) have agreed to review the
Mozambique guidanceand suggest edits for the rural landscape. This could be a
good opportunity for them to reviewand comment on the Highway Tag Africa wiki
as well.
More to come.
Thanks,Chad
On Mon, Jun 13, 2016 at 8:01 AM, john whelan <[email protected]> wrote:
OSM has its roots in the UK and Germany, in the UK highways are classified A,
B, I think even C and other very minor roads were labelled unclassified by
Ordnance Survey historically so that is where the term comes from. The UK
Ordnance Survey was historically important in creating everyday maps.
By using a standardised set of tags for highways it makes the rendering systems
life easier. OSMand for example is used everywhere in the world and if it had
to know about a different set of tags for each country the software would be
much more complicated. If you’re mapping in OSM of course there is nothing to
stop you tagging highways in any manner you like. The only problem is that the
features will not be rendered by the normal systems.
If you’re mapping in a HOT project then you’re expected to follow the HOT
guidelines for tagging. ie building=yes etc.
The problem here is the instructions for a group of projects only contain a
subset of the highway types used for mapping in Africa as defined by the
African Highway Wiki and the examples shown are all urban areas so the
instructions although correct are incomplete as the project covers both urban
and rural areas.
Cheerio John
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Chad BlevinsGeoCenter
U.S. Global Development Lab USAID202-712-0464
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