diff --git a/getterrain.php b/getterrain.php
new file mode 100644
index 0000000..ddd8cef
--- /dev/null
+++ b/getterrain.php
@@ -0,0 +1,20 @@
+<?php
+
+require 'required.php';
+require 'onlyloggedin.php';
+require 'latlong_validate.php';
+
+$terrain = json_decode(file_get_contents("http://gis.terranquest.net/terrain.php?key=" . GIS_API_KEY . "&lat=" . $VARS['lat'] . "&long=" . $VARS['long']));
+
+if (!is_empty($terrain['error'])) {
+    sendError($terrain['error'], true);
+} else {
+    $out = [
+        "status" => "OK",
+        "typeid" => $terrain['type'],
+        "latitude" => $terrain['latitude'],
+        "longitude" => $terrain['longitude'],
+        "typename" => $terrain['name']
+    ];
+    die(json_encode($out));
+}
\ No newline at end of file
diff --git a/latlong_validate.php b/latlong_validate.php
new file mode 100644
index 0000000..2da79ad
--- /dev/null
+++ b/latlong_validate.php
@@ -0,0 +1,12 @@
+<?php
+
+// Validate input
+if (is_empty($VARS['lat']) || is_empty($VARS['long'])) {
+    sendError("Missing information.", true);
+}
+if (!preg_match('/-?[0-9]{1,3}\.[0-9]{2,}/', $VARS['lat'])) {
+    sendError("Latitude (lat) is in the wrong format.", true);
+}
+if (!preg_match('/-?[0-9]{1,3}\.[0-9]{2,}/', $VARS['long'])) {
+    sendError("Longitude (long) is in the wrong format.", true);
+}
\ No newline at end of file
diff --git a/response.php b/response.php
index ec26082..57cc308 100644
--- a/response.php
+++ b/response.php
@@ -1,5 +1,10 @@
 <?php
 
+/**
+ * Send an OK message.
+ * @param type $message the message
+ * @param type $die to die or not to die?
+ */
 function sendOK($message = "", $die = false) {
     if (!is_empty($message) && JSON) {
         echo '{ "status": "OK", "message": "'.$message.'" }';
@@ -15,6 +20,11 @@ function sendOK($message = "", $die = false) {
     }
 }
 
+/**
+ * Send an error message.
+ * @param type $message the message
+ * @param type $die to die or not to die?
+ */
 function sendError($error, $die = false) {
     if (JSON) {
         echo '{ "status": "ERROR", "message": "' . $error . '" }';
diff --git a/settings.template.php b/settings.template.php
index bdf5064..45e8ad3 100644
--- a/settings.template.php
+++ b/settings.template.php
@@ -23,6 +23,11 @@ define("GEOCACHE_KEY", "");
 define("MUNZEE_KEY", "");
 define("MUNZEE_SECRET", "");
 
+// API key for the TerranQuest GIS server.
+// Has global terrain data and other large sets.
+// Get instructions for requesting a key at gis.terranquest.net.
+define("GIS_API_KEY", "");
+
 define("GOOGLEPLAY_PUBLICKEY", "");
 define("APP_STORE_SANDBOX", true);
 
diff --git a/weather_inc.php b/weather_inc.php
index 8ff878c..c4d5acd 100644
--- a/weather_inc.php
+++ b/weather_inc.php
@@ -5,24 +5,14 @@
  * Get the contents of the current weather with $currently
  */
 
-
-// Validate input
-if (is_empty($VARS['lat']) || is_empty($VARS['long'])) {
-    sendError("Missing information.", true);
-}
-if (!preg_match('/-?[0-9]{1,3}\.[0-9]{2,}/', $VARS['lat'])) {
-    sendError("Latitude (lat) is in the wrong format.", true);
-}
-if (!preg_match('/-?[0-9]{1,3}\.[0-9]{2,}/', $VARS['long'])) {
-    sendError("Longitude (long) is in the wrong format.", true);
-}
+require 'latlong_validate.php';
 
 // Round to 2 digits (approx. 1.1km)
 $lat = number_format((float) $VARS['lat'], 2, '.', '');
 $long = number_format((float) $VARS['long'], 2, '.', '');
 
 // Delete old records
-$database->delete('weathercache', ["date[<]" => date('Y-m-d H:i:s', strtotime('-1 hour'))]);
+$database->delete('weathercache', ["date[<]" => date('Y-m-d H:i:s', strtotime('-30 minutes'))]);
 
 // If we don't get a cache hit, request from the API
 if (!$database->has('weathercache', ["AND" => ["latitude" => $lat, "longitude" => $long]])) {