oDB =& $oDB; } function setZoom($iZoom) { // Zoom to rank, this could probably be calculated but a lookup gives fine control $aZoomRank = array( 0 => 2, // Continent / Sea 1 => 2, 2 => 2, 3 => 4, // Country 4 => 4, 5 => 8, // State 6 => 10, // Region 7 => 10, 8 => 12, // County 9 => 12, 10 => 17, // City 11 => 17, 12 => 18, // Town / Village 13 => 18, 14 => 22, // Suburb 15 => 22, 16 => 26, // Street, TODO: major street? 17 => 26, 18 => 30, // or >, Building 19 => 30, // or >, Building ); $this->iMaxRank = (isset($iZoom) && isset($aZoomRank[$iZoom]))?$aZoomRank[$iZoom]:28; } // returns { place_id =>, type => '(osm|tiger)' } // fails if no place was found function lookup($fLat, $fLon, $bDoInterpolation = true) { $sPointSQL = 'ST_SetSRID(ST_Point('.$fLon.','.$fLat.'),4326)'; $iMaxRank = $this->iMaxRank; $iMaxRank_orig = $this->iMaxRank; // Find the nearest point $fSearchDiam = 0.0004; $iPlaceID = null; $aArea = false; $fMaxAreaDistance = 1; $bIsInUnitedStates = false; $bPlaceIsTiger = false; $bPlaceIsLine = false; while(!$iPlaceID && $fSearchDiam < $fMaxAreaDistance) { $fSearchDiam = $fSearchDiam * 2; // If we have to expand the search area by a large amount then we need a larger feature // then there is a limit to how small the feature should be if ($fSearchDiam > 2 && $iMaxRank > 4) $iMaxRank = 4; if ($fSearchDiam > 1 && $iMaxRank > 9) $iMaxRank = 8; if ($fSearchDiam > 0.8 && $iMaxRank > 10) $iMaxRank = 10; if ($fSearchDiam > 0.6 && $iMaxRank > 12) $iMaxRank = 12; if ($fSearchDiam > 0.2 && $iMaxRank > 17) $iMaxRank = 17; if ($fSearchDiam > 0.1 && $iMaxRank > 18) $iMaxRank = 18; if ($fSearchDiam > 0.008 && $iMaxRank > 22) $iMaxRank = 22; if ($fSearchDiam > 0.001 && $iMaxRank > 26) $iMaxRank = 26; $sSQL = 'select place_id,parent_place_id,rank_search,calculated_country_code'; $sSQL .= ' FROM placex'; $sSQL .= ' WHERE ST_DWithin('.$sPointSQL.', geometry, '.$fSearchDiam.')'; $sSQL .= ' and rank_search != 28 and rank_search >= '.$iMaxRank; $sSQL .= ' and (name is not null or housenumber is not null)'; $sSQL .= ' and class not in (\'waterway\',\'railway\',\'tunnel\',\'bridge\',\'man_made\')'; $sSQL .= ' and indexed_status = 0 '; $sSQL .= ' and (ST_GeometryType(geometry) not in (\'ST_Polygon\',\'ST_MultiPolygon\') '; $sSQL .= ' OR ST_DWithin('.$sPointSQL.', centroid, '.$fSearchDiam.'))'; $sSQL .= ' ORDER BY ST_distance('.$sPointSQL.', geometry) ASC limit 1'; if (CONST_Debug) var_dump($sSQL); $aPlace = chksql($this->oDB->getRow($sSQL), "Could not determine closest place."); $iPlaceID = $aPlace['place_id']; $iParentPlaceID = $aPlace['parent_place_id']; $bIsInUnitedStates = ($aPlace['calculated_country_code'] == 'us'); } // if a street or house was found, look in interpolation lines table if ($bDoInterpolation && $iMaxRank_orig >= 28 && $aPlace && $aPlace['rank_search'] >= 26) { // if a house was found, search the interpolation line that is at least as close as the house $sSQL = 'SELECT place_id, parent_place_id, 30 as rank_search, ST_line_locate_point(linegeo,'.$sPointSQL.') as fraction'; $sSQL .= ' FROM location_property_osmline'; $sSQL .= ' WHERE ST_DWithin('.$sPointSQL.', linegeo, '.$fSearchDiam.')'; $sSQL .= ' and indexed_status = 0 '; $sSQL .= ' ORDER BY ST_distance('.$sPointSQL.', linegeo) ASC limit 1'; if (CONST_Debug) { $sSQL = preg_replace('/limit 1/', 'limit 100', $sSQL); var_dump($sSQL); $aAllHouses = chksql($this->oDB->getAll($sSQL)); foreach($aAllHouses as $i) { echo $i['housenumber'] . ' | ' . $i['distance'] * 1000 . ' | ' . $i['lat'] . ' | ' . $i['lon']. ' | '. "
\n"; } } $aPlaceLine = chksql($this->oDB->getRow($sSQL), "Could not determine closest housenumber on an osm interpolation line."); if ($aPlaceLine) { if (CONST_Debug) var_dump('found housenumber in interpolation lines table', $aPlaceLine); if ($aPlace['rank_search'] == 30) { // if a house was already found in placex, we have to find out, // if the placex house or the interpolated house are closer to the searched point // distance between point and placex house $sSQL = 'SELECT ST_distance('.$sPointSQL.', house.geometry) as distance FROM placex as house WHERE house.place_id='.$iPlaceID; $aDistancePlacex = chksql($this->oDB->getRow($sSQL), "Could not determine distance between searched point and placex house."); $fDistancePlacex = $aDistancePlacex['distance']; // distance between point and interpolated house (fraction on interpolation line) $sSQL = 'SELECT ST_distance('.$sPointSQL.', ST_LineInterpolatePoint(linegeo, '.$aPlaceLine['fraction'].')) as distance'; $sSQL .= ' FROM location_property_osmline WHERE place_id = '.$aPlaceLine['place_id']; $aDistanceInterpolation = chksql($this->oDB->getRow($sSQL), "Could not determine distance between searched point and interpolated house."); $fDistanceInterpolation = $aDistanceInterpolation['distance']; if ($fDistanceInterpolation < $fDistancePlacex) { // interpolation is closer to point than placex house $bPlaceIsLine = true; $aPlace = $aPlaceLine; $iPlaceID = $aPlaceLine['place_id']; $iParentPlaceID = $aPlaceLine['parent_place_id']; // the street $fFraction = $aPlaceLine['fraction']; $iMaxRank = 30; } // else: nothing to do, take placex house from above } else { $bPlaceIsLine = true; $aPlace = $aPlaceLine; $iPlaceID = $aPlaceLine['place_id']; $iParentPlaceID = $aPlaceLine['parent_place_id']; // the street $fFraction = $aPlaceLine['fraction']; $iMaxRank = 30; } } } // Only street found? If it's in the US we can check TIGER data for nearest housenumber if (CONST_Use_US_Tiger_Data && $bDoInterpolation && $bIsInUnitedStates && $iMaxRank_orig >= 28 && $iPlaceID && ($aPlace['rank_search'] == 26 || $aPlace['rank_search'] == 27 )) { $fSearchDiam = 0.001; $sSQL = 'SELECT place_id,parent_place_id,30 as rank_search, ST_line_locate_point(linegeo,'.$sPointSQL.') as fraction'; //if (CONST_Debug) { $sSQL .= ', housenumber, ST_distance('.$sPointSQL.', centroid) as distance, st_y(centroid) as lat, st_x(centroid) as lon'; } $sSQL .= ' FROM location_property_tiger WHERE parent_place_id = '.$iPlaceID; $sSQL .= ' AND ST_DWithin('.$sPointSQL.', linegeo, '.$fSearchDiam.')'; //no centroid anymore in Tiger data, now we have lines $sSQL .= ' ORDER BY ST_distance('.$sPointSQL.', linegeo) ASC limit 1'; if (CONST_Debug) { $sSQL = preg_replace('/limit 1/', 'limit 100', $sSQL); var_dump($sSQL); $aAllHouses = chksql($this->oDB->getAll($sSQL)); foreach($aAllHouses as $i) { echo $i['housenumber'] . ' | ' . $i['distance'] * 1000 . ' | ' . $i['lat'] . ' | ' . $i['lon']. ' | '. "
\n"; } } $aPlaceTiger = chksql($this->oDB->getRow($sSQL), "Could not determine closest Tiger place."); if ($aPlaceTiger) { if (CONST_Debug) var_dump('found Tiger housenumber', $aPlaceTiger); $bPlaceIsTiger = true; $aPlace = $aPlaceTiger; $iPlaceID = $aPlaceTiger['place_id']; $iParentPlaceID = $aPlaceTiger['parent_place_id']; // the street $fFraction = $aPlaceTiger['fraction']; $iMaxRank = 30; } } // The point we found might be too small - use the address to find what it is a child of if ($iPlaceID && $iMaxRank < 28) { if (($aPlace['rank_search'] > 28 || $bPlaceIsTiger || $bPlaceIsLine) && $iParentPlaceID) { $iPlaceID = $iParentPlaceID; } $sSQL = 'select address_place_id'; $sSQL .= ' FROM place_addressline'; $sSQL .= " WHERE place_id = $iPlaceID"; $sSQL .= " ORDER BY abs(cached_rank_address - $iMaxRank) asc,cached_rank_address desc,isaddress desc,distance desc"; $sSQL .= ' LIMIT 1'; $iPlaceID = chksql($this->oDB->getOne($sSQL), "Could not get parent for place."); if (!$iPlaceID) { $iPlaceID = $aPlace['place_id']; } } return array('place_id' => $iPlaceID, 'type' => $bPlaceIsTiger ? 'tiger' : ($bPlaceIsLine ? 'interpolation' : 'osm'), 'fraction' => ($bPlaceIsTiger || $bPlaceIsLine) ? $fFraction : -1); } } ?>