[OSM-dev] Fw: DBF files (shapefile) and OSM tags

[Nick Whitelegg]

>The columns in a shapefile's attributes have a fixed width, and that
>width is reserved for each shape. So the space usage will be
>approximately equal between using a single, concatenated column and
>multiple columns.

>What did you intend to gain by concatenating the columns?

What I was wondering about in particular was how to make the shapefile DBF file fit in with OSM's data format (where there is technically a limitless number of valid tags). Having one attribute column per OSM tag would presumably mean that any shapefile generating application would only be able to use a particular subset of
 tags. Has anyone else thought of this issue? I guess the best solution would just be to use the most commonly-used tags.

Nick

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