[OSM-talk-be] BE Quarterly Project (Schools) - Go !

[Jo]

About that CRAB import. In The Netherlands they already created a tool to
assist with that for their BAG import. I think we should look into reusing
that, adapted to the data we have available.

Polyglot

2016-01-21 5:35 GMT+01:00 Marc Gemis <marc.gemis at gmail.com>:

>
> On Wed, Jan 20, 2016 at 5:19 PM, Jasper Michels <jaspermichels at gmail.com>
> wrote:
>
>> It was mentioned that there exist free datasets for the flemish part.
>> (and cant we import the building outlines of Agiv?)
>>
>
> At this moment someone is working on converting the GRB data into
> something that can be "easily" imported.
>
> I've put "easily" between quotes, because it will still be a lot of work
> in areas where there are already buildings. The reason is that we should
> try to keep the history and data of the existing buildings. With data I
> mean POI info, heritage information, house name, 3D, building type, etc.
> Even when there is no information, it is polite to keep the names of the
> previous mappers in the history of the OSM way. I do not like an approach
> where all existing data is deleted.
>
> I have been replacing old AND data and buildings that I had traced from
> Bing imagery with data based on AGIV aerial images and recently with GRB
> data. It is labor intensive.
>
> The scenario  that I follow is
>
> * move the old house out of the way
> * redraw based on GRB
> * replace geometry of old building with new (from utilsplugin2). this
> keeps the history
> * drop source=AND
> * add building type based on aerial images and add address (address from
> AGIV) using housenumbertool
>
> Sometimes (with a lot of connected houses), I just try to reshape the old
> building way, because moving all houses out of the way is more difficult.
>
> With an import you do not have to do the drawing, but you still need to do
> the replace geometry. The other steps that you have to perform depends on
> the import data: is the building type correct ? is the address data already
> merged ?
>
> Since this is so much work to correct, it's a pitty to see that some power
> mappers are rushing through the current address data and only add rough
> approximations of the buildings. L-shaped buildings become rectangles, in
> terraces half of the buildings are ignored. Correcting this afterwards,
> might take more time than trying to do it correctly the first time around.
>
> In conclusion, you can already draw the buildings based on GRB now. No
> need to wait until the import is ready. For most buildings this is not too
> difficult. Churches and similar buildings with a lot of extrusions might be
> left until the import data is ready.
>
> just my .5 cents
>
> regards
>
> m
>
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