/
get_local_ap.php
343 lines (318 loc) · 11.6 KB
/
get_local_ap.php
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<?PHP
/* (c) 2013-2014 Trever L. Adams
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
function distance($lat1, $lon1, $lat2, $lon2)
{
$R = 20902231.64; // circumference of the earth in feet
$lat1 = deg2rad($lat1);
$lat2 = deg2rad($lat2);
$d = acos(sin($lat1) * sin($lat2) +
cos($lat1) * cos($lat2) *
cos($lon2 - $lon1)) * $R;
return $d;
}
// This is a simple translation of a function found at:
// http://en.wikipedia.org/wiki/Maidenhead_Locator_System
// (c) 2012 Chris Ruvolo. Licensed under a 2-clause BSD license.
function latlon2gs($lat, $lon)
{
$grid = "";
$five60 = doubleval(5)/doubleval(60);
$lon = $lon + 180;
$lat = $lat + 90;
$grid .= chr(ord('A') + intval($lon / 20));
$grid .= chr(ord('A') + intval($lat / 10));
$grid .= chr(ord('0') + intval(($lon % 20)/2));
$grid .= chr(ord('0') + intval(($lat % 10)/1));
$grid .= chr(ord('a') + intval(($lon - (intval($lon/2)*2)) / ($five60)));
$grid .= chr(ord('a') + intval(($lat - (intval($lat/1)*1)) / (2.5/60)));
return $grid;
}
// This is a simple translation of a function found at:
// http://en.wikipedia.org/wiki/Maidenhead_Locator_System
// (c) 2012 Chris Ruvolo. Licensed under a 2-clause BSD license.
function gs2latlon($grid)
{
$formatter=0;
$five60 = doubleval(5)/doubleval(60);
$lon = (ord($grid[0]) - ord('A')) * 20 - 180;
$lat = (ord($grid[1]) - ord('A')) * 10 - 90;
$lon += (ord($grid[2]) - ord('0')) * 2;
$lat += (ord($grid[3]) - ord('0')) * 1;
if (strlen($grid) >= 5) {
# have subsquares
$lon += (ord($grid[4]) - ord('A')) * $five60;
$lat += (ord($grid[5]) - ord('A')) * 2.5/60;
# move to center of subsquare
$lon += 2.5/60;
$lat += 1.25/60;
} else {
# move to center of square
$lon += 1;
$lat += 0.5;
}
return array ($lat, $lon);
}
function add_blocks($top, $left, $bottom, $right)
{
$gs_used = array();
$lon_tick = doubleval(5)/doubleval(60);
// print "Lon tick $lon_tick\n";
$lat_tick = 2.5/60;
// print "Lat tick $lat_tick\n";
$lat_current = $top;
if($bottom > $top) $lat_direction = 1;
else $lat_direction = 0;
if($right > $left) $lon_direction = 1;
else $lon_direction = 0;
do {
$lon_current = $left;
do {
// print "Lon: $lon_current $right\n";
$gs_used[] = latlon2gs($lat_current, $lon_current);
if(abs($lon_current - $right) > $lon_tick)
{
if($lon_direction) $lon_current = $lon_current + $lon_tick;
else $lon_current = $lon_current - $lon_tick;
// print "Lon (inner): $lon_current $right\n";
}
} while(abs($lon_current - $right) > $lon_tick);
$gs_used = array_unique($gs_used);
$gs_used[] = latlon2gs($lat_current, $lon_current);
// print "Lat: $lat_current $bottom\n";
if(abs($lat_current - $bottom) > $lat_tick)
{
if($lat_direction) $lat_current += $lat_tick;
else $lat_current -= $lat_tick;
// print "Lat (inner): $lat_current $bottom\n";
}
} while(abs($lat_current - $bottom) > $lat_tick);
return $gs_used;
}
$gs_used = array();
$right = doubleval($_GET["r"]);
$left = doubleval($_GET["l"]);
$top = doubleval($_GET["t"]);
$bottom = doubleval($_GET["b"]);
$zoom = intval($_GET["z"]);
if(isset($_GET["mzd"]))
$min_zoom_display = intval($_GET["mzd"]);
else
$min_zoom_display = 0;
if(isset($_GET["mzp"]))
$max_zoom_prune = intval($_GET["mzp"]);
else
$max_zoom_prune = 11;
if(isset($_GET["res"]))
$res = intval($_GET["res"]);
else
$res = 0;
$members = array();
$name="";
$lat="";
$long="";
$data="";
$half_long = 2.5/60;
$half_lat = 1.25/60;
$gs_used = add_blocks($top, $left, $bottom, $right);
$gs_used[] = latlon2gs($top, $left);
$gs_used[] = latlon2gs($top, $right);
$gs_used[] = latlon2gs($bottom, $left);
$gs_used[] = latlon2gs($bottom, $right);
$gs_used = array_unique($gs_used);
// Setup icons to use
if($res <= 2) {
$icon_file = "Ol_icon_red_example.png";
$icon_size = "16,16";
$icon_mp = "8,8";
}
else if($res <= 9) {
$icon_file = "Ol_icon_red_medium_poi.png";
$icon_size = "8,8";
$icon_mp = "4,4";
}
else if($res <= 16) {
$icon_file = "Ol_icon_red_small_poi.png";
$icon_size = "2,2";
$icon_mp = "1,1";
}
else {
$icon_file = "Ol_icon_red_micro_poi.png";
$icon_size = "1,1";
$icon_mp = "0,0";
}
print "lat\tlon\ticon\ticonSize\ticonOffset\ttitle\tdescription\tpopupSize\n";
if($min_zoom_display <= $zoom)
{
$last_used = -1;
if($max_zoom_prune > $zoom)
{
$example["long"] = doubleval(0);
$example["lat"] = doubleval(0);
$good = array_fill(0, 1000, $example);
}
foreach ($gs_used as &$value)
{
$cur_file = "gsdb/" . $value . ".csv";
if(file_exists($cur_file))
$file = fopen($cur_file, "r");
else
continue;
if(is_bool($file)) continue;
// We need to trash one line of text because it is CSV header
fgets($file);
if($max_zoom_prune < $zoom)
{
while (!feof($file))
{
$data = fgets($file);
if(strlen($data) > 2 && $data != False)
{
list($name, $lat, $long) = preg_split('/[\s]+/', $data);
$lat = doubleval($lat);
$long = doubleval($long);
if($lat >= $bottom && $lat <= $top && $long >= $left && $long <= $right)
{
printf("%lf\t%lf\t%s\t%s\t%s\t\t\t1,1\n", $lat, $long, $icon_file, $icon_size, $icon_mp);
}
}
}
fclose($file);
}
else {
if($res >= 19500)
{
list ($lat, $long) = gs2latlon($value);
$lat = doubleval($lat);
$long = doubleval($long);
$lat_plus = doubleval($lat + $half_lat);
$lat_less = doubleval($lat - $half_lat);
$long_plus = doubleval($long + $half_long);
$long_less = doubleval($long - $half_long);
if($lat >= $bottom && $lat <= $top && $long >= $left && $long <= $right) {
$temp["lat"] = $lat;
$temp["long"] = $long;
// printf("%lf\t%lf\t%s\t%s\t%s\t\t\t1,1\n", $lat, $long, $icon_file, $icon_size, $icon_mp);
}
else if($lat_plus >= $bottom && $lat_plus <= $top) {
if($long_plus >= $left && $long_plus <= $right)
{
$temp["lat"] = $lat_plus;
$temp["long"] = $long_plus;
// printf("%lf\t%lf\t%s\t%s\t%s\t\t\t1,1\n", $lat_plus, $long_plus, $icon_file, $icon_size, $icon_mp);
}
else
{
$temp["lat"] = $lat_plus;
$temp["long"] = $long_less;
// printf("%lf\t%lf\t%s\t%s\t%s\t\t\t1,1\n", $lat_plus, $long_less, $icon_file, $icon_size, $icon_mp);
}
} else {
if($long_plus >= $left && $long_plus <= $right)
{
$temp["lat"] = $lat_less;
$temp["long"] = $long_plus;
// printf("%lf\t%lf\t%s\t%s\t%s\t\t\t1,1\n", $lat_less, $long_plus, $icon_file, $icon_size, $icon_mp);
}
else
{
$temp["lat"] = $lat_less;
$temp["long"] = $long_less;
// printf("%lf\t%lf\t%s\t%s\t%s\t\t\t1,1\n", $lat_less, $long_less, $icon_file, $icon_size, $icon_mp);
}
}
if($last_used == -1)
{
$last_used++;
$good[$last_used]["lat"] = $lat;
$good[$last_used]["long"] = $long;
}
else {
$broken = 0;
for($i=$last_used; $i>=0; $i--)
{
if(distance($good[$i]["lat"], $good[$i]["long"], $temp["lat"], $temp["long"]) < $res) { $broken = 1; break; }
}
if(!$broken) {
$last_used++;
$good[$last_used]["lat"] = $lat;
$good[$last_used]["long"] = $long;
}
}
if($last_used == 1000)
{
for($i=0; $i<=$last_used; $i++)
{
printf("%lf\t%lf\t%s\t%s\t%s\t\t\t1,1\n", $good[$i]["lat"], $good[$i]["long"], $icon_file, $icon_size, $icon_mp);
}
$last_used = -1;
}
}
else {
$last_used = -1;
while (!feof($file))
{
$data = fgets($file);
if(strlen($data) > 2 && $data != False)
{
list($name, $lat, $long) = preg_split('/[\s]+/', $data);
$lat = doubleval($lat);
$long = doubleval($long);
if($last_used == -1)
{
$last_used++;
$good[$last_used]["lat"] = $lat;
$good[$last_used]["long"] = $long;
}
else if($lat >= $bottom && $lat <= $top && $long >= $left && $long <= $right)
{
$broken = 0;
for($i=$last_used; $i>=0; $i--)
{
if(distance($good[$i]["lat"], $good[$i]["long"], $lat, $long) < $res) { $broken = 1; break; }
}
if(!$broken) {
$last_used++;
$good[$last_used]["lat"] = $lat;
$good[$last_used]["long"] = $long;
}
}
}
if($last_used == 1000)
{
for($i=0; $i<=$last_used; $i++)
{
printf("%lf\t%lf\t%s\t%s\t%s\t\t\t1,1\n", $good[$i]["lat"], $good[$i]["long"], $icon_file, $icon_size, $icon_mp);
}
$last_used = -1;
}
}
for($i=0; $i<=$last_used; $i++)
{
printf("%lf\t%lf\t%s\t%s\t%s\t\t\t1,1\n", $good[$i]["lat"], $good[$i]["long"], $icon_file, $icon_size, $icon_mp);
$last_used = -1;
}
}
fclose($file);
}
}
if($last_used >= 0)
{
for($i=0; $i<=$last_used; $i++)
{
printf("%lf\t%lf\t%s\t%s\t%s\t\t\t1,1\n", $good[$i]["lat"], $good[$i]["long"], $icon_file, $icon_size, $icon_mp);
}
}
}
?>