New: tools/srtm/download_all.php to download all SRTM files from cmd …

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tools/.htaccess

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+Deny from all

tools/srtm/download_all.php

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+#!/usr/bin/env php
+<?php
+
+/**
+ * Returns absolute path to srtm direactory based on configuration.
+ * @return string
+ */
+function get_srtm_directory() {
+	global $config;
+
+	$srtm_directory = $config['srtm']['path'];
+	if ($srtm_directory[0] != '/') {
+		// It is relative folder so we have to resolve relatively
+		// to website root
+
+		$srtm_directory = dirname(__FILE__) . '/../../' . $srtm_directory;
+	}
+
+	return $srtm_directory;
+}
+
+/**
+ * Get bounds from configuration file
+ */
+function get_bounds() {
+	global $config;
+	return $config['gmap']['bounds'];
+}
+
+
+/**
+ * Get all SRTM regions
+ */
+function get_regions() {
+	return array(
+			'Africa',
+			'Australia',
+			'Eurasia',
+			'Islands',
+			'North_America',
+			'South_America'
+	);
+}
+
+/**
+ * Get the list with all SRTM files to be downloaded 
+ */
+function srtm_files($bound_sw, $bound_ne) {
+	// Calculate needed files
+	$needed_files = array();
+
+	for($lat = floor($bound_sw['lat']); $lat <= ceil($bound_ne['lat']);$lat += 1) {
+		// Clamp
+		if ($lat > 90)
+			$lat = -90;
+		for($lon = floor($bound_sw['lon']); $lon <= ceil($bound_ne['lon']);$lon += 1) {
+			// clamp
+			if ($lon > 180)
+				$lon = -180;
+
+			$fname = srtm::get_filename($lat, $lon);
+			$needed_files[$fname] = array(
+					'exists' => file_exists(get_srtm_directory() . "/" . $fname),
+					'lat' => $lat,
+					'lon' => $lon
+			);
+		}
+	}
+	return $needed_files;
+}
+
+/**
+ * Download srtm files for a specific latitude and longitude.
+ * @param int $lat
+ * @param int $lng
+ */
+function download_srtm_for($lat, $lon) {
+	global $config;
+	$base_url = 'http://dds.cr.usgs.gov/srtm/version2_1/SRTM3/';
+	$srtm_directory = get_srtm_directory() . "/";
+	$fname = srtm::get_filename($lat, $lon);
+	$zip_fname = $fname . '.zip';
+	$regions = array(
+			'Africa',
+			'Australia',
+			'Eurasia',
+			'Islands',
+			'North_America',
+			'South_America'
+	);
+
+	/*
+	 * Search file in all regions
+	*/
+	foreach($regions as $region) {
+
+		if (!($srtm_data = @file_get_contents($base_url . '/' . $region .'/' . $zip_fname)))
+			continue;
+
+		file_put_contents($srtm_directory . $zip_fname, $srtm_data);
+		if (!($zip = zip_open($srtm_directory . $zip_fname))){
+			die("Cannot unzip file \"" . $srtm_directory . $zip_fname . "\"\n");
+		}
+		while($e = zip_read($zip)) {
+			if (zip_entry_name($e) !== $fname)
+				continue;
+
+			zip_entry_open($zip, $e, "r");
+
+			$uncompressed = zip_entry_read($e, zip_entry_filesize($e));
+			file_put_contents($srtm_directory . $fname, $uncompressed);
+			zip_close($zip);
+			unlink($srtm_directory . $zip_fname);
+			return true;
+		}
+	}
+	die("Cannot find tile for {$lat},{$lon}\" in any region.\n");
+}
+
+//-------------------------------------------------------------------------
+// STEP 1: System validation
+
+//## Check php capabilities
+if (!extension_loaded('zip') || !function_exists('zip_open')) {
+	die("You need \"zip\" extension to download srtm files.\n");
+}
+
+//## Configuration checks
+$config_file = dirname(__FILE__) . '/../../config/config.php';
+
+if (! file_exists($config_file)) {
+	die("Cannot find configuration file.\n");
+}
+require($config_file);
+
+require_once dirname(__FILE__) . '/../../globals/classes/srtm.php';
+
+//## SRTM path checks
+if (! is_dir(get_srtm_directory())) {
+	die("SRTM path (".get_srtm_directory().") does not exists.\n");
+}
+
+if (! is_writable(get_srtm_directory())) {
+	die("SRTM path (".get_srtm_directory().") is not writable.\n");
+}
+print ("System is OK.\n");
+
+//-------------------------------------------------------------------------
+// STEP 2: Bounds checkings
+$bounds = get_bounds();
+$bound_sw = array('lat' => floatval($bounds['min_latitude']), 'lon' => floatval($bounds['min_longitude']));
+$bound_ne = array('lat' => floatval($bounds['max_latitude']), 'lon' => floatval($bounds['max_longitude']));
+
+if ($bound_sw['lat'] == $bound_ne['lat']) {
+	die("North and south boundaries have same value of latitude\n");
+}
+if ($bound_sw['lon'] == $bound_ne['lon']) {
+	die("West and east boundaries have same value of longitude\n");
+}
+print ("South West boundary at " . $bound_sw['lat'] . ",  ". $bound_sw['lon'] . "\n");
+print ("North East boundary at " . $bound_ne['lat'] . ",  ". $bound_ne['lon'] . "\n");
+
+
+//-------------------------------------------------------------------------
+// STEP 3: Download files
+foreach(srtm_files($bound_sw, $bound_ne) as $fname => $info) {
+	print $fname . " ";
+
+	// Skip existing
+	if ($info['exists']) {
+		print "SKIP (already exists)\n";
+		continue;
+	}
+	print "downloading... ";
+
+	if (download_srtm_for($info['lat'], $info['lon'])) {
+		print "OK\n";
+	}
+}
+print "Download of all needed srtm files, finshed succesfully!\n";