[Geocoding] Take House Numbers from TIGER on Reverse Geocoding

[Silviu Simon]

On 8/23/2012 10:12 PM, Sarah Hoffmann wrote:
> On Thu, Aug 23, 2012 at 10:50:57AM +0300, Silviu Simon wrote:
>> Hello,
>> I recently did an import of USA into my nominatim server database
>> and I've noticed that my searches on reverse-geocoding do not return
>> house numbers. I found out that in order to get house numbers,
>> nominatim uses TIGER on search, so I'm trying to make the program
>> use house numbers from TIGER on reverse geocoding.
>> I've noticed that this line
>>
>> $aAddress = getAddressDetails($oDB, $sLanguagePrefArraySQL,
>> $iPlaceID, $aPlace['country_code']);
>>
>> line 153 in website/reverse.php is responsible for building
>> @aAddress which contains all information about the address and is
>> then parsed in lib/template/address-xml.php to create the result
>> xml.
>> I'm thinking I should make a sql query in the tiger database to get
>> the house numbers, and then add it to $aAddress.
>> Am I correct? I would appreciate any help you could give me on this matter.
> getAddressDetails() will get you a nicely formatted TIGER address when you
> give it a $iPlaceID that is a place_id in the TIGER address table
> (location_property_tiger). This part of the code does not need to be changed.
> The only thing you need to do is find this nearest place_id.
>
> As twain already mentionened, the easiest way would most likely be to add
> an index on the centroid column of the location_property_tiger table and
> look for the nearest place_id. Add this around 111, compare with the result
> the while loop above returned and choose whichever suits you better. That
> is pretty much all.
>
> Sarah
>
Hello,
Could you please elaborate what do you mean with adding an index on the 
centroid column ?
Thank you!