> Dear Friends,
> As I mentioned in my post in last December: National Land Survey of Finland
> (later on: NLSF) has open all their topographic datasets on 1st of May.
> We have had lively discussion here in Finland among OSM activists about
> these datasets. Mainly this discussion has been in encrypted mode (ie. in
> Finnish). So as non-Finnish-speaking persons it might be difficult to
> understand what's going on. Here short summary about discussion and current
> plan of plan:
> NLSF datasets are very good. Finland is very big country with very few
> people (338k km2 / 5.4m inhabitans, Germany: 357k km2 / 81.8M inhabitants).
> So it's obvious that we can get enough OSM mappers (No, we don't want
> Germans here!).
> NLSF data is collected wit tax payers money. Every OSM activist has already
> paid smaller or bigger amount of taxes, VAT is 23%. So, NLSF data is our
> data.
> NLSF terms of use is very open
> (http://www.maanmittauslaitos.fi/en/NLS_open_data_licence_version1_201...)
> .
> DISCLAIMER: NO, WE ARE NOT PLANNING TO IMPORT NLSF DATA TO OSM! To be sure
> that everybody will understand: NO, WE ARE NOT PLANNING TO IMPORT NLSF DATA
> TO OSM! I hope everybody understood by message ;-)
> So, what's the plan? After several meetings, f2f discussion, forums and IRC
> chats, we have common understanding: we have to benefit NLSF data in our
> OpenStreetMap data collection. NLSF data is not perfect, in some areas OSM
> data is better. Thas's why NLSF is planning to use OSM as hint data source.
> Now there is several Finnish OSM activists who analysize NSLF data and try
> to understand how we can benefit it. You can found their documentation here:
> http://wiki.openstreetmap.org/wiki/Maastotietokanta. Some work is also done
> here: http://wiki.openstreetmap.org/wiki/Fi:Maastotietokanta/Luokat (this is
> classification cross check table between NLFS topographic database and OSM
> tags.
> Here are some principles in our planning:
> - we don't overwrite anything from OSM
> - if NLSF feature is intersection OSM feature, OSM Feature will win
> (usually)
> - if OSM feature has worst data source (like Landsat waters, Corine
> Land Data Cover forests), it can be replaced by NLSF feature
> - NLSF data can be imported to OSM with semi-automated method: with
> human interaction. Like NLSF buildings has been exported to osm-file, user
> open file in JOSM and decide feature by feature what to do.
> - Automated imports are possible in the areas where we don't active
> OSM mappers
> - NLSF orthophotos and raster maps are used to background
> information to leverage OSM quality in various places.
> All comments are welcomed!
> If you like really test your GIS systems, you can download already NLSF
> datasets via our torrent services. More information here:
> http://paikkatieto.com/2012/05/08/downloading-national-land-survey-da...
> Pekka
> ps. DISCLAIMER2: http://wiki.openstreetmap.org/wiki/Import/Guidelines is
> mandatory reading in Finnish schools ;-)
> ps2. it seems that first post has vanished.
> --
> Pekka Sarkola
> Gispo Oy
> <mailto:pekka.sark...@gispo.fi> pekka.sark...@gispo.fi - GSM +358 40 725
> 2042
> <http://www.gispo.fi> www.gispo.fi - <http://www.paikkatieto.com>
> www.paikkatieto.com
