Thanks Suzan.
Andy
On Tuesday, 14 June 2016, 7:50, Suzan Reed <su...@suzanreed.com> wrote:
The phrase “mainly by pedestrians” can mean a path can also be use by a car,
horses, or a motorbike as well.
A mapper has to use good judgment, hopefully based on well written, clear and
complete instructions, and in this case, the Africa wiki. If the instructions
aren’t clear, it just takes much more time to get a project completed. Someone
maps incorrectly because the instructions aren’t well written, then a second
person has to clean it up or invalidate it, and so on and so on, and this
causes a lot of wasted time by a lot of people. The original mapper feels badly
because the work is invalidated and so on it goes. So whomever writes the
instructions has a responsibility to all the other mappers who come to their
project to help them do a good job the first time through. Rewriting the
instructions when it’s discovered they aren’t clear should be easy.
I really don’t like having to fix other people’s work when the Instructions
could have been written more clearly and thats what I’m hearing from other
people, too.
Hope this is helpful.
Suzan
On Jun 13, 2016, at 1:36 PM, andy Gardner <andygardnerm...@yahoo.co.uk> wrote:
It says on the highway tag Africa wiki for highway=path "Paths not large enough
for cars and mainly for pedestrians".
I take your point about motorbikes Suzan but how do you tell from the image
that a path sized way is being used as a road? would you go by density of
buildings?
On Monday, 13 June 2016, 20:35, john whelan <jwhelan0...@gmail.com> wrote:
>so limiting to a certain size vehicle is putting too much of a restriction on
>mapping in Africa, in my opinion.
and I think that was the conclusion of the people who created the African
Highway wiki, if the highway is wide enough for two trucks side by side you can
guess its not a path, but other than that it is difficult to know, especially
as the visible width may change with the seasons.
Cheerio John
On 13 June 2016 at 15:14, Suzan Reed <su...@suzanreed.com> wrote:
In some rural areas people have a lot of different vehicles for transport. Some
adapt motorbikes with cargo carriers making them into little trucks and
motorbikes can be loaded in various ways and are used as transport, and these
can travel on many tracks and minor/unclassified roads, so limiting to a
certain size vehicle is putting too much of a restriction on mapping in Africa,
in my opinion.
Suzan
On Jun 13, 2016, at 11:54 AM, andy Gardner <andygardnerm...@yahoo.co.uk> wrote:
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 <cblev...@usaid.gov> wrote:
Hi John,
You're absolutely correct. When Courtney and I created the Mozambique Tracing
Guide the original tasks were urban focused, and the scope has changed to rural
areas. Currently a group of interns are mapping those districts and I've had
several inquiries about road classifications. The guidance I’ve given is to
tag all rural roads as unclassified unless they are clearly labeled/numbered as
a “major” road, or very small pathways.
The Africa roads wiki is great and was referenced when creating the Mozambique
guide. Many road examples in this part of the world are debatable as
"unclassified", "tracks", or "paths". It’s almost impossible to know the use
and in some cases classifications may change based on time of year. A subset
of interns copied here (Forrest, Julia, and Alex) have agreed to review the
Mozambique guidance and suggest edits for the rural landscape. This could be a
good opportunity for them to review and 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 <jwhelan0...@gmail.com> 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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GeoCenter
U.S. Global Development Lab
USAID
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