function maps_images_for_dots(&$bag_of_dots, $more = array())
{
$defaults = array('width' => 1024, 'height' => 768, 'draw_dots' => 1, 'dot_size' => 25);
$template = $GLOBALS['cfg']['maptiles_template_url'];
# This really needs to happen in modestmaps/Providers.php
# but we'll do it here for now (20110112/straup)
$hosts = $GLOBALS['cfg']['maptiles_template_hosts'];
shuffle($hosts);
$defaults['template'] = str_replace("{S}", $hosts[0], $template);
$more = array_merge($defaults, $more);
# If $GLOBALS['cfg']['enable_feature_wscompose'] is true then the drawing of
# actual raster maps will be delegated to a wscompose server running on the
# host and port of your choosing. The advantage of doing it this way is that
# the PHP port of ModestMaps fetches tiles (for a map image) one at a time
# while the Python version fetches them in a thread. If you're going to use
# the wscompose stuff you should probably run the WSGIComposeServer under a
# not-single-threaded server like gunicorn. Note that we still use ModestMaps.php
# to draw dots. For now. (20110726/straup)
# See the $queue array, below? We're going to iterate over all the dots and for
# each one create an array of ModestMap.php objects and wscompose argument hashes.
# The first foreach loop is used to figure out the bounds of the map and zoom
# levels. The second loop is what will actually draw the maps. If wscompose is
# in the house then the code will see whether it should try to fetch all the maps
# using a multiget, using wscompose sequentially or ModestMaps.php sequentially.
# The third and final loop will iterate over $queue and $bag_of_dots in parallel
# and use the latter to draw dots on the corresponding index (image) in the former.
# (20110727/straup)
$queue = array();
foreach ($bag_of_dots as $dots) {
# null island
if (count($dots) == 0) {
$template = 'http://acetate.geoiq.com/tiles/acetate-hillshading/{Z}/{X}/{Y}.png';
$provider = new MMaps_Templated_Spherical_Mercator_Provider($template);
$centroid = new MMaps_Location(0, 0);
$dims = new MMaps_Point($more['width'], $more['height']);
$map = MMaps_mapByCenterZoom($provider, $centroid, 18, $dims);
$wscompose_args = array('provider' => $template, 'method' => 'center', 'latitude' => 0, 'longitude' => 0, 'zoom' => 18, 'height' => $more['height'], 'width' => $more['width']);
$queue[] = array($map, $wscompose_args);
} else {
if (count($dots) == 1) {
$dot = $dots[0];
$provider = new MMaps_Templated_Spherical_Mercator_Provider($template);
$centroid = new MMaps_Location($dot['latitude'], $dot['longitude']);
$dims = new MMaps_Point($more['width'], $more['height']);
$map = MMaps_mapByCenterZoom($provider, $centroid, 17, $dims);
$wscompose_args = array('provider' => $template, 'method' => 'center', 'latitude' => $dot['latitude'], 'longitude' => $dot['longitude'], 'zoom' => 17, 'height' => $more['height'], 'width' => $more['width']);
$queue[] = array($map, $wscompose_args);
} else {
$swlat = null;
$swlon = null;
$nelat = null;
$nelon = null;
foreach ($dots as $dot) {
$swlat = !isset($swlat) ? $dot['latitude'] : min($swlat, $dot['latitude']);
$swlon = !isset($swlon) ? $dot['longitude'] : min($swlon, $dot['longitude']);
$nelat = !isset($nelat) ? $dot['latitude'] : max($nelat, $dot['latitude']);
$nelon = !isset($nelon) ? $dot['longitude'] : max($nelon, $dot['longitude']);
}
$provider = new MMaps_Templated_Spherical_Mercator_Provider($template);
$sw = new MMaps_Location($swlat, $swlon);
$ne = new MMaps_Location($nelat, $nelon);
$dims = new MMaps_Point($more['width'], $more['height']);
$wscompose_args = array('provider' => $template, 'height' => $more['height'], 'width' => $more['width']);
if ($swlat == $nelat && $swlon == $nelon) {
$map = MMaps_mapByCenterZoom($provider, $sw, 17, $dims);
$wscompose_args['method'] = 'center';
$wscompose_args['latitude'] = $swlat;
$wscompose_args['longitude'] = $swlon;
$wscompose_args['zoom'] = 17;
} else {
$map = MMaps_mapByExtent($provider, $sw, $ne, $dims);
$wscompose_args['method'] = 'extent';
$wscompose_args['bbox'] = implode(",", array($swlat, $swlon, $nelat, $nelon));
}
$queue[] = array($map, $wscompose_args);
}
}
}
# now we actually draw the images
$count_queue = count($queue);
# use wscompose and plow through all the images using a series of
# batched multiget request (the multiget stuff happens in lib_http)
if ($GLOBALS['cfg']['enable_feature_wscompose'] && $GLOBALS['cfg']['wscompose_enable_multigets']) {
$wscompose_args = array();
foreach ($queue as $stuff) {
list($mm, $ws_args) = $stuff;
$wscompose_args[] = $ws_args;
}
$rsp = array();
$batch_size = 25;
while (count($wscompose_args)) {
$slice = array_slice($wscompose_args, 0, $batch_size);
$wscompose_args = array_slice($wscompose_args, $batch_size);
$_rsp = wscompose_get_many($slice);
$rsp = array_merge($rsp, $_rsp);
}
# merge the results back in to $queue
for ($i = 0; $i < $count_queue; $i++) {
list($mm, $ignore) = $queue[$i];
$_rsp = $rsp[$i];
$img = $_rsp['ok'] ? $_rsp['image'] : null;
$queue[$i] = array($mm, $img);
}
} else {
if ($GLOBALS['cfg']['enable_feature_wscompose']) {
for ($i = 0; $i < $count_queue; $i++) {
list($mm, $ws_args) = $queue[$i];
$rsp = wscompose_get($ws_args);
$img = $rsp['ok'] ? $rsp['image'] : null;
$queue[$i] = array($mm, $img);
}
} else {
for ($i = 0; $i < $count_queue; $i++) {
list($mm, $ignore) = $queue[$i];
$img = $mm->draw();
$queue[$i] = array($mm, $img);
}
}
}
# Not dots! Just return here and save ourselves the
# very special Hell of another if/else block...
if (!$more['draw_dots']) {
return $queue;
}
# Carry on and draw the dots using ModestMaps.php - at some point this
# may be functionality that is also delegated to wscompose/pinwin but
# for now it is not. (20110726/straup)
$rsp = array();
$fill = imagecolorallocatealpha($img, 11, 189, 255, 96);
$stroke = imagecolorallocate($img, 255, 255, 255);
if (isset($GLOBALS['cfg']['dot_color_scheme'])) {
$red_fill_val = isset($GLOBALS['cfg']['dot_color_scheme']['fill'][0]) ? $GLOBALS['cfg']['dot_color_scheme']['fill'][0] : 11;
$green_fill_val = isset($GLOBALS['cfg']['dot_color_scheme']['fill'][1]) ? $GLOBALS['cfg']['dot_color_scheme']['fill'][1] : 189;
$blue_fill_val = isset($GLOBALS['cfg']['dot_color_scheme']['fill'][2]) ? $GLOBALS['cfg']['dot_color_scheme']['fill'][2] : 255;
# alpha value: convert alpha scale from 0,1 to 127,0
$alpha_fill_val = isset($GLOBALS['cfg']['dot_color_scheme']['fill'][3]) ? floor(abs($GLOBALS['cfg']['dot_color_scheme']['fill'][3] * 127 - 127)) : 96;
$red_stroke_val = isset($GLOBALS['cfg']['dot_color_scheme']['stroke'][0]) ? $GLOBALS['cfg']['dot_color_scheme']['stroke'][0] : 255;
$green_stroke_val = isset($GLOBALS['cfg']['dot_color_scheme']['stroke'][1]) ? $GLOBALS['cfg']['dot_color_scheme']['stroke'][1] : 255;
$blue_stroke_val = isset($GLOBALS['cfg']['dot_color_scheme']['stroke'][2]) ? $GLOBALS['cfg']['dot_color_scheme']['stroke'][2] : 255;
$fill = imagecolorallocatealpha($img, $red_fill_val, $green_fill_val, $blue_fill_val, $alpha_fill_val);
$stroke = imagecolorallocate($img, $red_stroke_val, $green_stroke_val, $blue_stroke_val);
}
for ($i = 0; $i < $count_queue; $i++) {
list($mm, $img) = $queue[$i];
$_dots = $bag_of_dots[$i];
# because GD images get passed around as 'null' values...
if ($img) {
foreach ($_dots as $dot) {
$loc = new MMaps_Location($dot['latitude'], $dot['longitude']);
$pt = $mm->locationPoint($loc);
imagefilledellipse($img, $pt->x, $pt->y, $more['dot_size'], $more['dot_size'], $fill);
imagesetthickness($img, 3);
imagearc($img, $pt->x, $pt->y, $more['dot_size'], $more['dot_size'], 0, 359.9, $stroke);
}
}
$rsp[] = array($mm, $img);
}
return $rsp;
}
/**
* Convert a string of GeoJSON data to an atlas composition and queue it up.
*/
function compose_from_geojson(&$dbh, $data)
{
$json = json_decode($data, true);
if (!is_geojson($json)) {
return null;
}
//
// Move on to the actual business of converting GeoJSON to an atlas.
// Start with a global paper size and orientation for the full document.
//
$p = $json['properties'];
$paper_size = is_array($p) && isset($p['paper_size']) ? $p['paper_size'] : 'letter';
$orientation = is_array($p) && isset($p['orientation']) ? $p['orientation'] : 'portrait';
$layout = is_array($p) && isset($p['layout']) ? $p['layout'] : 'full-page';
//
// "orientation" above refers to the *map*, so if we want half-size
// we'll need to flip the orientation of the overall printed sheet
// to accommodate it.
//
if ($orientation == 'landscape' && $layout == 'half-page') {
$orientation = 'portrait';
} elseif ($orientation == 'portrait' && $layout == 'half-page') {
$orientation = 'landscape';
}
list($printed_width, $printed_height) = get_printed_dimensions($paper_size, $orientation, $layout);
$printed_aspect = $printed_width / $printed_height;
$paper_type = "{$orientation}, {$paper_size}";
$message = array('action' => 'compose', 'paper_size' => $paper_size, 'orientation' => $orientation, 'layout' => $layout, 'pages' => array());
//
// Iterate over each feature and determine an appropriate extent and zoom.
// Each feature in the GeoJSON becomes a single page in the atlas.
//
foreach ($json['features'] as $f => $feature) {
$number = $f + 1;
//
// Check the properties for a provider and explicit zoom.
//
$p = $feature['properties'];
$provider = is_array($p) && isset($p['provider']) ? new MMaps_Templated_Spherical_Mercator_Provider($p['provider']) : new MMaps_OpenStreetMap_Provider();
$explicit_zoom = is_array($p) && is_numeric($p['zoom']);
$zoom = $explicit_zoom ? intval($p['zoom']) : 16;
$mark = is_array($p['mark']) ? $p['mark'] : null;
$fuzzy = is_array($p['fuzzy']) ? $p['fuzzy'] : null;
$text = isset($p['text']) ? $p['text'] : null;
//
// Determine extent based on geometry type and zoom level.
//
$extent = null;
if ($feature['geometry']['type'] == 'Point') {
$extent = geojson_point_extent($feature['geometry'], $zoom);
} elseif ($feature['geometry']['type'] == 'Polygon') {
$extent = geojson_polygon_extent($feature['geometry']);
} else {
die_with_code(500, "I don't know how to do this yet, sorry.");
}
//
// If we got this far, we know we have a meaningful zoom and extent
// for this page, now adjust it to the known aspect ratio of the page.
//
$_mmap = MMaps_mapByExtentZoom($provider, $extent[0], $extent[1], $zoom);
$dim = $_mmap->dimensions;
$_mmap_center = $_mmap->pointLocation(new MMaps_Point($dim->x / 2, $dim->y / 2));
$_mmap_aspect = $dim->x / $dim->y;
if ($printed_aspect > $_mmap_aspect) {
// paper is wider than the map
$dim->x *= $printed_aspect / $_mmap_aspect;
} else {
// paper is taller than the map
$dim->y *= $_mmap_aspect / $printed_aspect;
}
$mmap = MMaps_mapByCenterZoom($provider, $_mmap_center, $zoom, $dim);
$provider = join(',', $mmap->provider->templates);
$northwest = $mmap->pointLocation(new MMaps_Point(0, 0));
$southeast = $mmap->pointLocation($mmap->dimensions);
$bounds = array($northwest->lat, $northwest->lon, $southeast->lat, $southeast->lon);
$message['pages'][] = compact('number', 'provider', 'bounds', 'zoom', 'text', 'mark', 'fuzzy');
}
//
// Make room in the database for the new print and all its pages.
//
$print = add_print($dbh, 'nobody');
$print['paper_size'] = $message['paper_size'];
$print['orientation'] = $message['orientation'];
$print['layout'] = $message['layout'];
$print['north'] = $message['pages'][0]['bounds'][0];
$print['south'] = $message['pages'][0]['bounds'][2];
$print['west'] = $message['pages'][0]['bounds'][1];
$print['east'] = $message['pages'][0]['bounds'][3];
foreach ($message['pages'] as $_page) {
$page = add_print_page($dbh, $print['id'], $_page['number']);
$page['text'] = $_page['text'];
$page['provider'] = $_page['provider'];
$page['zoom'] = $_page['zoom'];
$page['north'] = $_page['bounds'][0];
$page['south'] = $_page['bounds'][2];
$page['west'] = $_page['bounds'][1];
$page['east'] = $_page['bounds'][3];
set_print_page($dbh, $page);
$print['north'] = max($print['north'], $page['north']);
$print['south'] = min($print['south'], $page['south']);
$print['west'] = min($print['west'], $page['west']);
$print['east'] = max($print['east'], $page['east']);
}
$print['progress'] = 0.1;
// the first 10% is getting it queued
set_print($dbh, $print);
$message['print_id'] = $print['id'];
// queue the task
queue_task("tasks.composePrint", array("http://" . SERVER_NAME, API_PASSWORD), $message);
return $print;
}
function test_map_by_center_zoom()
{
$c = new MMaps_Location(37.804274, -122.26294);
$z = 12;
$d = new MMaps_Point(800, 600);
$m = MMaps_mapByCenterZoom(new MMaps_OpenStreetMap_Provider(), $c, $z, $d);
$this->assertEquals('(800.000, 600.000)', $m->dimensions->toString(), 'Map dimensions');
$this->assertEquals('(1582.000, 656.000 @12.000)', $m->coordinate->toString(), 'Map coordinate');
$this->assertEquals('(-235.000, -196.000)', $m->offset->toString(), 'Map offset');
}
<?php
require_once 'ModestMaps.php';
$p = new MMaps_Templated_Spherical_Mercator_Provider('http://tile.openstreetmap.org/{Z}/{X}/{Y}.png,http://osm.stamen.com/gridtile/tilecache.cgi/1.0/mgrs/{Z}/{X}/{Y}.png');
$m = MMaps_mapByCenterZoom($p, new MMaps_Location(37.804969, -122.257662), 14, new MMaps_Point(500, 500));
$i = $m->draw();
imagepng($i, '/tmp/out.png');