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97 рядки
3.6 KiB
PHP
97 рядки
3.6 KiB
PHP
<?php
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/**
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* Takes the latitude and longitude and gets nearby places from OSM.
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*
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* Uses WGS84 in the DD.DD format, because I say so.
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*/
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require 'required.php';
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use AnthonyMartin\GeoLocation\GeoLocation as GeoLocation;
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if (is_empty($VARS['lat'])) {
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sendError("Missing required latitude (lat) variable.", true);
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}
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if (is_empty($VARS['long'])) {
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sendError("Missing required longitude (long) variable.", true);
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}
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if (!preg_match('/-?[0-9]{1,3}\.[0-9]{1,}/', $VARS['lat'])) {
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sendError("Latitude (lat) is in the wrong format, or does not have enough precision (DD.DD, at least 2 decimal places.", true);
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}
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if (!preg_match('/-?[0-9]{1,3}\.[0-9]{1,}/', $VARS['long'])) {
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sendError("Longitude (long) is in the wrong format, or does not have enough precision (DD.DD, at least 2 decimal places.", true);
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}
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$lat = number_format((float) $VARS['lat'], 5, '.', '');
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$long = number_format((float) $VARS['long'], 5, '.', '');
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$radius = 5;
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if (!is_empty($VARS['radius']) && is_numeric($VARS['radius'])) {
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$radius = floatval($VARS['radius']);
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}
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$userlocation = GeoLocation::fromDegrees($VARS['lat'], $VARS['long']);
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$searchbounds = $userlocation->boundingCoordinates($radius, 'miles');
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// Get the points halfway between the bounds
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$lathalf = abs($searchbounds[1]->getLatitudeInDegrees() - $searchbounds[0]->getLatitudeInDegrees()) / 2;
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$lonhalf = abs($searchbounds[1]->getLongitudeInDegrees() - $searchbounds[0]->getLongitudeInDegrees()) / 2;
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$places1 = $database->select('places', '*', ['AND' => [
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'latitude[>]' => $searchbounds[0]->getLatitudeInDegrees(),
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'latitude[<]' => $searchbounds[1]->getLatitudeInDegrees() - $lathalf, // 0 - .5
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'longitude[>]' => $searchbounds[0]->getLongitudeInDegrees(),
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'longitude[<]' => $searchbounds[1]->getLongitudeInDegrees() - $lonhalf], // 0 - .5
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"LIMIT" => 50]);
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$places2 = $database->select('places', '*', ['AND' => [
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'latitude[>]' => $searchbounds[0]->getLatitudeInDegrees() + $lathalf, // .5 - 1
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'latitude[<]' => $searchbounds[1]->getLatitudeInDegrees(),
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'longitude[>]' => $searchbounds[0]->getLongitudeInDegrees() + $lonhalf, // .5 - 1
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'longitude[<]' => $searchbounds[1]->getLongitudeInDegrees()],
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"LIMIT" => 50]);
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$places3 = $database->select('places', '*', ['AND' => [
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'latitude[>]' => $searchbounds[0]->getLatitudeInDegrees(),
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'latitude[<]' => $searchbounds[1]->getLatitudeInDegrees() - $lathalf, // 0 - .5
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'longitude[>]' => $searchbounds[0]->getLongitudeInDegrees() + $lonhalf, // .5 - 1
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'longitude[<]' => $searchbounds[1]->getLongitudeInDegrees()],
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"LIMIT" => 50]);
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$places4 = $database->select('places', '*', ['AND' => [
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'latitude[>]' => $searchbounds[0]->getLatitudeInDegrees() + $lathalf, // .5 - 1
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'latitude[<]' => $searchbounds[1]->getLatitudeInDegrees(),
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'longitude[>]' => $searchbounds[0]->getLongitudeInDegrees(),
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'longitude[<]' => $searchbounds[1]->getLongitudeInDegrees() - $lonhalf], // 0 - .5
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"LIMIT" => 50]);
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$places = array_merge($places1, $places2, $places3, $places4);
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$geo['name'] = "Places";
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$geo['type'] = 'FeatureCollection';
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$geo['features'] = [];
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foreach ($places as $place) {
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$geo['features'][] = array("type" => "Feature",
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"geometry" => [
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"type" => "Point",
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"coordinates" => [
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floatval($place['longitude']),
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floatval($place['latitude'])
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]
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],
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"properties" => [
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"osm_id" => intval($place['osmid']),
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"name" => ($place['name'] == '' ? null : $place['name'])
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]
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);
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}
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$out = json_encode($geo);
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if ($out == false) {
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sendError("Server error.");
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} else {
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echo $out;
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} |