[HOT] Could we get more out of our mappers by asking for less?
Florian Niel
florian.niel at gmail.com
Sun Feb 26 10:11:21 UTC 2017
I would switch it: Map buildings (and maybe residential areas) first and
then roads. Buildings or residential areas help mapping roads (if a road
is a track or unclassified) while roads are no help when mapping buildings.
Am 26.02.2017 um 03:36 schrieb Vao Matua:
> John,
>
> I think there is merit to what you are saying.
>
> The one caution I would suggest is that "If something is worth mapping
> it is worth mapping correctly". Here in Ethiopia I have spent a lot
> of time adding nodes to roads that were digitized at a coarse scale.
> Mapping quickly doesn't have to be done crudely.
> There is no troupe of magic mapping elves that clean up the rough
> mapping.
>
> The next set of HOT projects I will set up will be roads/highways only
> and then buildings only.
>
> Keep mapping,
>
> Emmor
>
> On Sun, Feb 26, 2017 at 1:16 AM, john whelan <jwhelan0112 at gmail.com
> <mailto:jwhelan0112 at gmail.com>> wrote:
>
> Just an ideal thought. It came about as I'm loading in bits of
> Nigeria by the enamel bucket at the moment then looking for
> untagged ways and crossing highways.
>
> What stands out are blocks where every track and settlement is
> mapped and blank bits of the map. I've been attempting to join
> bits of highway together to reduce the islands.
>
> Projects that ask for buildings are different but for projects
> where we are looking to map settlements and connecting highways if
> we omitted the paths and tracks leading to fields and rivers and
> mapped say two or three highways max to a cluster of three huts we
> might be able to get rid of some of the large gaps in the map and
> unless someone can think of a reason why tracks and paths leading
> to fields are essential I think many NGOs could manage without.
> In return we could make more settlements and highways available in
> the same time frame.
>
> Part of the problem is each project is looked at separately. Each
> project manager only thinks in terms of their own project rather
> than in terms of how much resources are available overall. I am
> aware that some organisations feel they are independent having
> their own mapathons but to get the quality up you need validation
> and if you don't believe me just have a look at the map after a
> mapathon. Nigeria is full of settlements wrongly tagged,
> building=residential or yes are amongst the most common incorrect
> tagging. A number of small villages have been interconnected with
> highway=primary etc. Crossing ways by the hundred.
>
> I don't know how you would write the instructions for a such a
> project but it might help the projects get completed more
> quickly. I heard an off the cuff remark about a project recently,
> "It'll take a year at that level of detail.". Off the cuff
> comments are more gut feel than accurate but there was an element
> of truth in the remark and I had the feeling the data was desired
> within a month or two. I would suggest if you want the mapping
> done quickly reduce the scope a little.
>
> Thoughts?
>
> Thanks John
>
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