hans/Nominatim
1
0
Fork 1
mirror of https://github.com/osm-search/Nominatim.git synced 2026-02-16 15:47:58 +00:00
Code Issues Packages Projects Releases Wiki Activity

added comments and improved geOutline function

Browse Source
This commit is contained in:
gemo1011
2018-06-26 15:16:19 +02:00
parent 97b6656182
commit 1d7ed6737e
2 changed files with 18 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
lib/ReverseGeocode.php
View File

@@ -75,11 +75,14 @@ class ReverseGeocode
protected function polygonFunctions($sPointSQL, $iMaxRank)
{
// starts the nopolygonFound function if no polygon is found with the lookupPolygon function
$oResult = null;
$aPlace = $this->lookupPolygon($sPointSQL, $iMaxRank);
if ($aPlace) {
$oResult = new Result($aPlace['place_id']);
// if no polygon which contains the searchpoint is found,
// the noPolygonFound function searches in the country_osm_grid table for a polygon
} elseif (!$aPlace && $iMaxRank > 4) {
$aPlace = $this->noPolygonFound($sPointSQL, $iMaxRank);
if ($aPlace) {
@@ -92,6 +95,7 @@ class ReverseGeocode
protected function noPolygonFound($sPointSQL, $iMaxRank)
{
// searches for polygon in table country_osm_grid which contains the searchpoint
// and searches for the nearest place node to the searchpoint in this polygon
$sSQL = 'SELECT * FROM country_osm_grid';
$sSQL .= ' WHERE ST_CONTAINS (geometry, '.$sPointSQL.' )';
@@ -127,11 +131,14 @@ class ReverseGeocode
protected function lookupPolygon($sPointSQL, $iMaxRank)
{
// searches for polygon where the searchpoint is within
// if a polygon is found, placenodes with a higher rank are searched inside the polygon
// polygon search begins at suburb-level
if ($iMaxRank > 25) $iMaxRank = 25;
// no polygon search over country-level
if ($iMaxRank < 4) $iMaxRank = 4;
// search for polygon
$sSQL = 'SELECT * FROM';
$sSQL .= '(select place_id,parent_place_id,rank_address, rank_search, country_code, geometry';
$sSQL .= ' FROM placex';
@@ -150,6 +157,7 @@ class ReverseGeocode
'Could not determine polygon containing the point.'
);
if ($aPoly) {
// if a polygon is found, search for placenodes begins ...
$iParentPlaceID = $aPoly['parent_place_id'];
$iRankAddress = $aPoly['rank_address'];
$iRankSearch = $aPoly['rank_search'];
@@ -225,7 +233,10 @@ class ReverseGeocode
public function lookupPoint($sPointSQL, $bDoInterpolation = true)
{
// starts if the search is on POI or street level,
// searches for the nearest POI or street,
// if a street is found and a POI is searched for,
// the nearest POI which the found street is a parent of is choosen.
$iMaxRank = $this->iMaxRank;
// Find the nearest point
@@ -322,7 +333,7 @@ class ReverseGeocode
// In the US we can check TIGER data for nearest housenumber
if (CONST_Use_US_Tiger_Data && $aPlace['country_code'] == 'us' && $this->iMaxRank >= 28) {
$fSearchDiam = $aPlace['rank_search'] > 28 ? $aPlace['distance'] : 0.001;
$fSearchDiam = $aPlace['rank_address'] > 28 ? $aPlace['distance'] : 0.001;
$sSQL = 'SELECT place_id,parent_place_id,30 as rank_search,';
$sSQL .= 'ST_LineLocatePoint(linegeo,'.$sPointSQL.') as fraction,';
$sSQL .= 'ST_distance('.$sPointSQL.', linegeo) as distance,';