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Use GB postcode table as definitive source. resort by pressence of search word in output address and other misc very minor changes not commited from MQ servers

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Brian Quinion
2012-03-22 00:33:28 +00:00
committed by Brian Quinion
parent ad125a9913
commit b99a043c78
11 changed files with 106 additions and 108 deletions
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50
lib/lib.php
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@@ -40,9 +40,9 @@
function byImportance($a, $b)
{
/*
if ($a['importance'] != $b['importance'])
return ($a['importance'] > $b['importance']?-1:1);
/*
if ($a['aPointPolygon']['numfeatures'] != $b['aPointPolygon']['numfeatures'])
return ($a['aPointPolygon']['numfeatures'] > $b['aPointPolygon']['numfeatures']?-1:1);
if ($a['aPointPolygon']['area'] != $b['aPointPolygon']['area'])
@@ -173,60 +173,12 @@
exit;
}
if (sizeof($aNearPostcodes))
{
return array(array('lat' => $aNearPostcodes[0]['lat'], 'lon' => $aNearPostcodes[0]['lon'], 'radius' => 0.005));
}
return false;
/* partial search disabled because it sequentially scans placex
$sSQL = 'select substring(upper(postcode) from \'^[A-Z][A-Z]?[0-9][0-9A-Z]? [0-9]([A-Z][A-Z])$\'),ST_X(ST_Centroid(geometry)) as lon,ST_Y(ST_Centroid(geometry)) as lat from placex where country_code::text = \'gb\'::text AND substring(postcode from \'^([A-Z][A-Z]?[0-9][0-9A-Z]? [0-9])[A-Z][A-Z]$\') = \''.$sPostcodeSector.'\' and class=\'place\' and type=\'postcode\' ';
$sSQL .= ' union ';
$sSQL .= 'select substring(upper(postcode) from \'^[A-Z][A-Z]?[0-9][0-9A-Z]? [0-9]([A-Z][A-Z])$\'),ST_X(ST_Centroid(geometry)) as lon,ST_Y(ST_Centroid(geometry)) as lat from gb_postcode where substring(postcode from \'^([A-Z][A-Z]?[0-9][0-9A-Z]? [0-9])[A-Z][A-Z]$\') = \''.$sPostcodeSector.'\'';
$aNearPostcodes = $oDB->getAll($sSQL);
if (PEAR::IsError($aNearPostcodes))
{
var_dump($sSQL, $aNearPostcodes);
exit;
}
if (!sizeof($aNearPostcodes))
{
return false;
}
$fTotalLat = 0;
$fTotalLon = 0;
$fTotalFac = 0;
foreach($aNearPostcodes as $aPostcode)
{
$iDiff = gbPostcodeAlphaDifference($sPostcodeEnd, $aPostcode['substring'])*2 + 1;
if ($iDiff == 0)
$fFac = 1;
else
$fFac = 1/($iDiff*$iDiff);
$fTotalFac += $fFac;
$fTotalLat += $aPostcode['lat'] * $fFac;
$fTotalLon += $aPostcode['lon'] * $fFac;
}
if ($fTotalFac)
{
$fLat = $fTotalLat / $fTotalFac;
$fLon = $fTotalLon / $fTotalFac;
$fRadius = min(0.1 / $fTotalFac, 0.02);
return array(array('lat' => $fLat, 'lon' => $fLon, 'radius' => $fRadius));
}
return false;
*/
/*
$fTotalFac is a suprisingly good indicator of accuracy
$iZoom = 18 + round(log($fTotalFac,32));
$iZoom = max(13,min(18,$iZoom));
*/
}
function usPostcodeCalculate($sPostcode, &$oDB)