Add error handling for just about any case. Will always return data for

any point on Earth, but the accuracy may be lower than optimal.

terrain.php

@@ -14,10 +14,35 @@ if (!preg_match('/-?[0-9]{1,3}\.[0-9]{2,}/', $VARS['long'])) {
 }
 
 // Round to 2 digits (approx. 1.1km)
-$lat = number_format((float) $VARS['lat'], 2, '.', '');
-$long = number_format((float) $VARS['long'], 2, '.', '');
+$lat = (float) number_format((float) $VARS['lat'], 2, '.', '');
+$long = (float) number_format((float) $VARS['long'], 2, '.', '');
 
-$terrainid = $database->select('terrain', 'type', ["AND" => ["latitude" => $lat, "longitude" => $long]])[0];
+if (abs($lat) > 90.00 || abs($long) > 180.00) {
+    sendError("Coordinates out-of-bounds.  Are you sure you're on Earth?", true);
+}
+
+$finallat = $lat;
+$finallong = $long;
+
+if ($database->has('terrain', ["AND" => ["latitude" => $lat, "longitude" => $long]])) {
+    // We're good
+} else if ($database->has('terrain', ["AND" => ["latitude" => $lat + .01, "longitude" => $long]])) {
+    $finallat = $lat + 0.01;
+} else if ($database->has('terrain', ["AND" => ["latitude" => $lat, "longitude" => $long + .01]])) {
+    $finallong = $long + 0.01;
+} else {
+    // last resort
+    $tries = 0;
+    while (!$database->has('terrain', ["AND" => ["latitude" => $finallat, "longitude" => $finallong]]) && $tries < 5) {
+        $finallat = $finallat + 0.01;
+        $finallong = $finallong + 0.01;
+        $tries++;
+    }
+    if ($tries >= 5) {
+        sendError("Terrain data not found for the given coordinates or anything nearby.", true);
+    }
+}
 
-$out = ["status" => "OK", "type" => $terrainid];
-echo json_encode($out);
+$terrainid = $database->select('terrain', 'type', ["AND" => ["latitude" => $finallat, "longitude" => $finallong]])[0];
+$out = ["status" => "OK", "type" => $terrainid, "latitude" => $finallat, "longitude" => $finallong];
+echo json_encode($out);