> In an interpolation, the number of houses is unknown.
The wiki page for the Karlsruhe Schema on interpolation has said this since the day it was created; "For missing house-numbers (e.g. missing "12") two ways need to be drawn (e.g. "1-11" and "13-25"). " I.e. if you have the first house #1 and last house #25, but there is no #12, then you should have two interpolation ways - 1-11 and 13-25. Something similar would apply if you only had even numbers or odd numbers. That's how I've been using it and I thought others were. This makes it explicit exactly how many houses are present. Interpolation allows editors to edit large quantities of address data without needing to add many hundreds of POIs - or indeed needing to take waypoints for every single building (yet). The wiki for the Karlsruhe Schema suggests that interpolation is intended as a temporary feature - with eventually house numbers being tagged explicitly as individual nodes or building outlines. You still have to do the survey to find any missing numbers (or as is quite common here to find extra numbers i.e. those with A or B etc. suffixes which are quite common here) - but interpolation allows a huge speed up of the process of entering data and surveying, without actually losing much information (you lose the exact position of each building - which is not so important if buildings are roughly regularly spaced). Where there is a big gap between houses, I tend to use two separate interpolation ways. You mention about commercial maps just interpolating between first and last; If you go to G**gle maps and type in a house number with street name which doesn't exist - it takes you to a location somewhere near the middle of the street. If you type in a house number on the same street that does exist, it takes you to the interpolated position of that house. E.g. one I entered on OSM the other day; 8 Lindow Fold Drive http://tinyurl.com/yjhyhfa But there is no 18 or 20 Lindow Fold Drive (despite every other even number being present between 2 and 32) Try typing 18 or 20 in and it just takes you to the street, not a specific part of the street. (OSM location http://osm.org/go/eu15MCjuj--) _______________________________________________ Tagging mailing list [email protected] http://lists.openstreetmap.org/listinfo/tagging
