On 12/01/2011 02:36, Steve Singer wrote:
Have you considered spatial matching? For each light you want to import
check to see if there is already a light within x meters (say 10-20?) if so
excluded the light from the import and leave it to be manually inspected?
Given that LoL positions are only specified to within 0.1', a duplicate
search radius would have to be more like 300m to take into account
positional inaccuracies of both. Within such a radius there would often
be more than one other light, particularly in buoyed channels and on
pierheads.
There is also the difficulty of identifying a duplicate. Matching of
names would likely result in a high error rate. Other features such as
buoy type or colour may also be problematic. Therefore framing and
writing matching criteria rules would be a huge task.
Given that the duplicate problem would be concentrated in areas that are
actively mapped, it might be easier to identify the mappers and
circulate a notification and request them to re-visit & edit their
previous mapped areas.
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