[Geocoding] Take House Numbers from TIGER on Reverse Geocoding

[Sarah Hoffmann]

On Thu, Sep 06, 2012 at 10:43:58AM +0300, Silviu Simon wrote:
> 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 ?

CREATE INDEX idx_tiger_centroid ON location_property_tiger USING GIST(centroid);

Regards

Sarah