Thanks for the feedback Andy, I'll tackle each point below, @Kevin hopefully #3 should address your concerns about accuracy
1) The source data appears to be heavily overprocessed. This only applies to data other than the postcode centroids, such as the Census Output Areas and other categorizations The postcode centroid is accurate in the data, the OSM wiki[1] even says the data matches the Code Point centroids (not sure who did that analysis), so I'm not sure how much more accurate you would require it to be? 2) The license is unclear I think this has been visited several times before, but I based my decision to use this dataset by the information on the wiki[1] which states: "Office of National Statistics Postcode centroids. The ONS have released postcode centroids under the standard Open Goverment License (OGL). These centroids match (to a few cm) those in the Code-Point Open data and can be used in OpenStreetMap" If that is incorrect, then I'm happy to work with another data set that is compatible with OSM. 3) We don't want to import this stuff anyway I'm getting a contradictory message from you on this one, but I think we're on the same page. Let me explain how the data is filtered to *ensure* the postcode is mapped to a correct building which you say should be the aim. I am not simply using the centroid, I am combining it with the quality indicator in the ONS data. I've only included the highest quality data which is postcode centroids that fall within a building within the area of the postcode. The only time I've seen an issue with postcodes that fall in this category is when there are multiple postcodes that map to the same building, and I am filtering all of those cases out. Does that allay any concerns about the import? [1] http://wiki.openstreetmap.org/wiki/Ordnance_Survey_Opendata On 27 February 2013 09:46, Kevin Peat <[email protected]> wrote: > Aidan, > > On 27 Feb 2013 09:04, "Andy Allan" <[email protected]> wrote: > > > > Please don't load this data into OpenStreetMap. It's not a good idea. > > > > 100% agree with Andy. To be acceptable your script would need to do at > least as good a job as mappers could do by hand which I don't think is > possible with only centroids being available. It's easy for a person to > look at a postcode overlay and spot that a postcode just applies to one > side of a street but I don't see how your script can do this with any > degree of confidence. > > What I would like to see is a tool (similar to ITO's OS Locator > reconciliation) to encourage people to add more postcodes. > > Kevin >
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