Thanks for explaining the problems you encountered. Since those early onroerend erfgoed nodes, I have changed my mapping habits. This means that I solve the problems that you mention (1 historic item matching multiple buildings/1 building/part of a building) myself now.
At this moment I still do both building drawing and adding house numbers in 1 go, but I prefer to work more in residential areas (individual houses) than town centers (rows of houses). regards m On Tue, Nov 17, 2015 at 3:26 PM, Glenn Plas <gl...@byte-consult.be> wrote: > I agree, since there were not too many individual houses in the city, it > was a lot better (plus nominatim can find nodes addresses). They were > -for a long time- the only house numbers we had in OSM. > > Sometimes it's in fact difficult as a monument can be a facade which > encompasses 3 house numbers. So I had to check the 'onroerenderfgoed' > links to make sure what house numbers they refer to. > > Often it's a 1 on 1 downward merge , but I've seen plenty of cases where > there is a 1-house size offset. > > All in all, I would say AGIV is pretty accurate for Mechelen (I did all > of Zemst, Bonheiden and Mechelen now) but there are still issues of more > recent data not being there (and the house + number exist). New > street(names), demolished buildings still in the AGIV database etc. it's > never complete. But I believe the results OSM Mechelen vs Google > Mechelen is worth it. > http://aptum.bitless.be/?pcode=2800&loadOsm=true&collapsedSections= > > You also need a house/building to be there to work efficiently, I found > a lot of errors on corners ( that leaded me to the conclusion that most > house numbers where 'guessed' by using other sources , or by > extrapolating, not too scientific. > > I think I did a lot of them now. wish I had a decent analysis tool to > show me exactly how much crab work I've done so far, but to conclude: > > - having decent buildings before migration house numbers is almost > essential. > - mapping houses together with numbers is painstakingly slow. Better > create houses first, then later on (days, months, whatever) they will be > visible on the map when you start with phase 2: > - mapping house numbers. Sanders tool is essential, especially the > integration with JOSM remote control. > - extra care needs to be taken when you have existing data, associated > street relations will be deleted (most of them yours too ;-) once a road > is completed, all the houses are there. > - Sometimes there is NO house number attached to the 'erfgoed', So I > have to check the inventory to see what it applies to. > - Sometimes is also needed to make it more complex, like > https://inventaris.onroerenderfgoed.be/dibe/relict/88684 -> > https://www.openstreetmap.org/relation/5620662 > - There have been occasions where I used the erfgoed information to > validate a house number. > > You don't want to change the house number on the erfgoed itself, as that > would be inacurate, just to accommodate the map (or routers), hence you > need to change that single node into a site relation (which I think is > very well suited for this) > > I believe that was a good call you made by making nodes. migration that > information with the terracing plugin is as easy as doing CTRL+shift+T > > Cheers! > > Glenn > > On 17-11-15 13:30, Marc Gemis wrote: >> On Tue, Nov 17, 2015 at 1:27 PM, Glenn Plas <gl...@byte-consult.be> wrote: >>> and I encountered many >>> 'monumenten' from you, which I nicely migrated from node to buildings :) >> >> that's very kind of you. I didn't do that from the beginning, because >> it was too difficult to find the location of the house numbers back >> then. We didn't had AGIV CRAB. I thought individual nodes were easier >> to merge/reposition than badly shaped/positioned building areas. >> >> What is your opinion ? >> >> regards >> >> m >> >> _______________________________________________ >> Talk-be mailing list >> Talk-be@openstreetmap.org >> https://lists.openstreetmap.org/listinfo/talk-be >> > > > _______________________________________________ > Talk-be mailing list > Talk-be@openstreetmap.org > https://lists.openstreetmap.org/listinfo/talk-be _______________________________________________ Talk-be mailing list Talk-be@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-be
