[postgis-users] Geocoding Issues with Route, ##-## house numbers; upgrade questions

[Stephen Woodbridge]

On 7/28/2011 2:31 AM, Paragon Corporation wrote:
> Steve,
>
> Thanks.  I would be interested in this once I get to tackling street
> numbers, but battling some other issues at the moment on various other
> fronts so I'm a bit distracted and only focusing on low hanging fruit aside
> from the critical stuff I'm working on.

Regina,

No problem, when you want to tackle this let me know. I have down a lot 
of work on this already. I attached a zip file with the distinct left 
side patterns. These are no quite the abstract patterns I mention below 
but they are useful. I can also look into generating those patterns, but 
first I think we need to think the problem through.

The way I generated these format strings was to classify the numbers in 
the from-to ranges and identify which part of the complex number was 
varying over the length of the segment. Then saved that part as the 
from-to address numbers for that range and saved the formatting to 
reconstitute the whole number. This was used in my reverse geocoder and 
does not exactly work for geocoding but I think a similar trick can be 
devised for geocoding. This has a basic assumption that only one part 
can vary otherwise I'm not sure how one would interpolate a distance 
over the range. You will notice toward the end of the list that there 
are two {} escape patterns which means there are two components that are 
varying over the range so those are probably broken.

Anyway, give me a shout when you have time to look into this and I'm 
happy to discuss it with you and see if we can work out a strategy that 
will work for geocoding.

Thanks,
   -Steve

> Thanks,
> Regina
>
>> This is a harder problem because there are a great many different house
>> number range patterns and most geocoders assume only simple house
>> numbers. This problem is compounded by the fact that you need to match
>> even if one or more of the components are missing. For example, if the
>> street has an address range does the 112 or the 31 component vary over
>> the range?
>
>> Regina, If you want all the various patterns I have what so other docs
>> that have all the patterns described. We might also want to load all the
>> Tiger data and run a pattern classifier on all the Tiger house numbers.
>> We could convert the actual house number into something like:
>
>> n - a string of digits
>> a - a string of letters
>> p - punctuation
>> s - space(s)
>
>
>
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