[Imports] Tanzania roads manual import

Paul Norman penorman at mac.com
Wed Aug 19 00:32:00 UTC 2015

On 8/17/2015 3:16 PM, Rafael Avila Coya wrote:
> As the license gives permission only for the import to OSM (before Sept.
> 2016), we can't put it freely available (in a Dropbox link for example),
> as anyone accessing it must accept the license before downloading.

You are proposing to make it available with your proposed workflow, 
where someone can download it.
>> - if you advise the mappers to always run line simplifications on the
>> ways first it would be better to do this on the whole data set in
>> advance, this would avoid unnecessary work for the mappers.
> Running the Simplify Way plugin for each task takes just seconds, when
> each task can take an average of one hour. It's true that running the
> Simplify way for the whole data would avoid this step for mappers, and I
> obviously thought about it, but it seemed to freeze my JOSM when
> applying the plugin to too many segments at the same time. I will check
> if I can find a command line script that applies the algorithm and that
> it works fine for all segments altogether.

Experience has shown that users will inconsistently simplify the data. 
The best time to simplify is generally *before* converting to OSM 
format, if using a format that supports topology.

If you must simplify a large number of ways in JOSM, first try giving it 
more memory and launching with a console, and giving it tens of minutes 
to complete. If that's still too much, only simplify a portion at a 
time. Don't forget to adjust the simplify-way.max-error advanced 
preference to be suitable for the data quality.
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