super rough block + js + drupal.settings

gistfile1.txt

/**
 * Implements hook_block_info().
 *
 * This hook declares what blocks are provided by the module.
 */
function block_example_block_info() {

  // This sample shows how to provide default settings. In this case we'll
  // enable the block in the first sidebar and make it visible only on
  // 'node/*' pages. See the hook_block_info() documentation for these.
  $blocks['example_empty'] = array(
    // info: The name of the block.
    'info' => t('Example: configurable text string'),
    // Block caching options (per role, per user, etc.)
    // DRUPAL_CACHE_PER_ROLE is the default.
    'cache' => DRUPAL_CACHE_PER_ROLE,
  );

  return $blocks;
}

/**
 * Implements hook_block_view().
 *
 * This hook generates the contents of the blocks themselves.
 */
function block_example_block_view($delta = '') {
  // The $delta parameter tells us which block is being requested.
  switch ($delta) {

    case 'example_empty':
      $block['subject'] = t('Title of second block (example_empty)');
      $block['content'] = block_example_contents($delta);
      $block['content'] = array(
        '#markup' => '<>',
        '#attached' => array(
          'js' => array(
            'data' => get_map_data(),
            'type' => 'settings'
          )
        )
       );
      break;

  }
  return $block;
}

function get_map_data(){
  //something like this : https://bitbucket.org/domain7/drupal-humanitas/src/df84fc24c3a9096092aa031b31ef774ad2dc61bd/sites/all/modules/humanitas_api/humanitas_api.module?at=master&fileviewer=file-view-default

  $data = array();

  $nodes = node_load_multiple(array(), array('type' => 'my_typ'));
  foreach($nodes as $node){
    $data[] = node_map_info($node);
  }

  return $data;
}

function node_map_info($node){
  $node_data = array();

  $node_data['lat'] = ....;
  $node_data['lon'] = ....;
  $node_data['title'] = ....;
  $node_data['teaser'] = ....;

  return $node_data;
}