Custom module to provide static JSON map data

module.php

<?php
function mymod_menu() {
  $items['view/path/that/returns/the/json] = array(
    'title' => t('JSON Callback'),
    'page callback' => 'mymod_callback',
    'access callback' => TRUE,
    'type' => MENU_CALLBACK,
  );
  return $items;
}

function mymod_callback() {
  $json = "/some/file/on/disk.js";
  die(file_get_contents($json));
}

Line 3 is missing a closing single quote character.

The gist should read:

<?php
function mymod_menu() {
  $items['view/path/that/returns/the/json'] = array(
    'title' => t('JSON Callback'),
    'page callback' => 'mymod_callback',
    'access callback' => TRUE,
    'type' => MENU_CALLBACK,
  );
  return $items;
}

function mymod_callback() {
  $json = "/some/file/on/disk.js";
  die(file_get_contents($json));
}

Note that this also fixes the syntax highlighting.