[HOT] Could we get more out of our mappers by asking for less?

john whelan jwhelan0112 at gmail.com
Sun Feb 26 13:18:29 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.

I would agree that mapping highways without settlements is more difficult.
If its a building project then mapping the residential highways first makes
it a bit easier and divides the tiles up.

Cheerio John

On 26 February 2017 at 05:11, Florian Niel <florian.niel at gmail.com> wrote:

> 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>
> 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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