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simplify geometry handling in details page

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Hand the WKT directly to OpenLayers and let the client do the parsing,
it will be able to handle multipolygons as well as line strings.
Simplify geometries if they have too many points.

Also limit the number of child objects listed to 500.
This commit is contained in:
Sarah Hoffmann
2012-11-08 22:21:20 +01:00
parent df3202017e
commit 4bb56d98a8
2 changed files with 30 additions and 61 deletions
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52
website/details.php
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@@ -60,7 +60,8 @@
// Get the details for this point
$sSQL = "select place_id, osm_type, osm_id, class, type, name, admin_level, housenumber, street, isin, postcode, country_code, importance, wikipedia,";
$sSQL .= " parent_place_id, rank_address, rank_search, get_searchrank_label(rank_search) as rank_search_label, get_name_by_language(name,$sLanguagePrefArraySQL) as localname, ";
$sSQL .= " ST_GeometryType(geometry) in ('ST_Polygon','ST_MultiPolygon') as isarea,ST_GeometryType(geometry) as geotype, ST_Y(ST_Centroid(geometry)) as lat,ST_X(ST_Centroid(geometry)) as lon ";
$sSQL .= " ST_GeometryType(geometry) in ('ST_Polygon','ST_MultiPolygon') as isarea, ";
$sSQL .= " ST_AsText(CASE WHEN ST_NPoints(geometry) > 5000 THEN ST_SimplifyPreserveTopology(geometry, 0.0001) ELSE geometry END) as outlinestring";
$sSQL .= " from placex where place_id = $iPlaceID";
$aPointDetails = $oDB->getRow($sSQL);
if (PEAR::IsError($aPointDetails))
@@ -69,9 +70,6 @@
}
$aPointDetails['localname'] = $aPointDetails['localname']?$aPointDetails['localname']:$aPointDetails['housenumber'];
$fLon = $aPointDetails['lon'];
$fLat = $aPointDetails['lat'];
$iZoom = 14;
$aClassType = getClassTypesWithImportance();
$aPointDetails['icon'] = $aClassType[$aPointDetails['class'].':'.$aPointDetails['type']]['icon'];
@@ -84,43 +82,6 @@
$sSQL = "select (each(extratags)).key,(each(extratags)).value from placex where place_id = $iPlaceID order by (each(extratags)).key";
$aPointDetails['aExtraTags'] = $oDB->getAssoc($sSQL);
// Get the bounding box and outline polygon
$sSQL = "select ST_AsText(geometry) as outlinestring,";
$sSQL .= "ST_YMin(geometry) as minlat,ST_YMax(geometry) as maxlat,";
$sSQL .= "ST_XMin(geometry) as minlon,ST_XMax(geometry) as maxlon";
$sSQL .= " from placex where place_id = $iPlaceID";
$aPointPolygon = $oDB->getRow($sSQL);
IF (PEAR::IsError($aPointPolygon))
{
failInternalError("Could not get bounding box of place object.", $sSQL, $aPointPolygon);
}
if (preg_match('#POLYGON\\(\\(([- 0-9.,]+)#',$aPointPolygon['outlinestring'],$aMatch))
{
preg_match_all('/(-?[0-9.]+) (-?[0-9.]+)/',$aMatch[1],$aPolyPoints,PREG_SET_ORDER);
}
elseif (preg_match('#MULTIPOLYGON\\(\\(\\(([- 0-9.,]+)#',$aPointPolygon['outlinestring'],$aMatch))
{
// TODO: this just takes the first ring
preg_match_all('/(-?[0-9.]+) (-?[0-9.]+)/',$aMatch[1],$aPolyPoints,PREG_SET_ORDER);
}
elseif (preg_match('#POINT\\((-?[0-9.]+) (-?[0-9.]+)\\)#',$aPointPolygon['outlinestring'],$aMatch))
{
$fRadius = 0.01;
if ($aPointDetails['rank_search'] > 20) $fRadius = 0.0001;
$iSteps = min(max(($fRadius * 40000)^2,16),100);
$fStepSize = (2*pi())/$iSteps;
$aPolyPoints = array();
for($f = 0; $f < 2*pi(); $f += $fStepSize)
{
$aPolyPoints[] = array('',$aMatch[1]+($fRadius*sin($f)),$aMatch[2]+($fRadius*cos($f)));
}
$aPointPolygon['minlat'] = $aPointPolygon['minlat'] - $fRadius;
$aPointPolygon['maxlat'] = $aPointPolygon['maxlat'] + $fRadius;
$aPointPolygon['minlon'] = $aPointPolygon['minlon'] - $fRadius;
$aPointPolygon['maxlon'] = $aPointPolygon['maxlon'] + $fRadius;
}
// Address
$aAddressLines = getAddressDetails($oDB, $sLanguagePrefArraySQL, $iPlaceID, $aPointDetails['country_code'], true);
@@ -133,11 +94,12 @@
$aLinkedLines = $oDB->getAll($sSQL);
// All places this is an imediate parent of
$sSQL = "select placex.place_id, osm_type, osm_id, class, type, housenumber, admin_level, rank_address, ST_GeometryType(geometry) in ('ST_Polygon','ST_MultiPolygon') as isarea, st_distance(geometry, placegeometry) as distance, ";
$sSQL = "select obj.place_id, osm_type, osm_id, class, type, housenumber, admin_level, rank_address, ST_GeometryType(geometry) in ('ST_Polygon','ST_MultiPolygon') as isarea, st_distance(geometry, placegeometry) as distance, ";
$sSQL .= " get_name_by_language(name,$sLanguagePrefArraySQL) as localname, length(name::text) as namelength ";
$sSQL .= " from placex, (select geometry as placegeometry from placex where place_id = $iPlaceID) as x";
$sSQL .= " where parent_place_id = $iPlaceID";
$sSQL .= " order by rank_address asc,rank_search asc,get_name_by_language(name,$sLanguagePrefArraySQL),housenumber";
$sSQL .= " from (select placex.place_id, osm_type, osm_id, class, type, housenumber, admin_level, rank_address, rank_search, geometry, name from placex ";
$sSQL .= " where parent_place_id = $iPlaceID order by rank_address asc,rank_search asc limit 500) as obj,";
$sSQL .= " (select geometry as placegeometry from placex where place_id = $iPlaceID) as x";
$sSQL .= " order by rank_address asc,rank_search asc,localname,housenumber";
$aParentOfLines = $oDB->getAll($sSQL);
$aPlaceSearchNameKeywords = false;