diff --git a/common/glfw_view.cpp b/common/glfw_view.cpp
index 9590cc5e7..3cc50b591 100644
--- a/common/glfw_view.cpp
+++ b/common/glfw_view.cpp
@@ -273,5 +273,9 @@ void show_color_debug_image(std::string name, const char *data, size_t logical_w
     glfwMakeContextCurrent(current_window);
 }
 
+void notify_map_change() {
+    // no-op
+}
+
 }
 }
diff --git a/include/llmr/platform/platform.hpp b/include/llmr/platform/platform.hpp
index 62fa1badc..972e7db6b 100644
--- a/include/llmr/platform/platform.hpp
+++ b/include/llmr/platform/platform.hpp
@@ -32,6 +32,9 @@ std::shared_ptr<Request> request_http(const std::string &url,
 // Cancels an HTTP request.
 void cancel_request_http(const std::shared_ptr<Request> &req);
 
+// Notifies a watcher of map x/y/scale/rotation changes.
+void notify_map_change();
+
 // Shows an alpha image with the specified dimensions in a named window.
 void show_debug_image(std::string name, const char *data, size_t width, size_t height);
 
diff --git a/ios/MVKMapKit b/ios/MVKMapKit
index 38fabc640..8b7e61545 160000
--- a/ios/MVKMapKit
+++ b/ios/MVKMapKit
@@ -1 +1 @@
-Subproject commit 38fabc640b3311d45a06aa746f9106db7c7630dd
+Subproject commit 8b7e61545a504e71c59bc22b9f5bad22248c8980
diff --git a/src/map/transform.cpp b/src/map/transform.cpp
index 2382cac88..996117bfa 100644
--- a/src/map/transform.cpp
+++ b/src/map/transform.cpp
@@ -35,6 +35,7 @@ bool Transform::resize(const uint16_t w, const uint16_t h, const float ratio,
         current.framebuffer[1] = final.framebuffer[1] = fb_h;
         if (!canRotate()) _setAngle(0);
         constrain(current.scale, current.y);
+        platform::notify_map_change();
         return true;
     } else {
         return false;
@@ -74,6 +75,8 @@ void Transform::_moveBy(const double dx, const double dy, const time duration) {
         transitions.emplace_front(
             std::make_shared<util::ease_transition<double>>(current.y, final.y, current.y, start, duration));
     }
+
+    platform::notify_map_change();
 }
 
 void Transform::setLonLat(const double lon, const double lat, const time duration) {
@@ -290,6 +293,8 @@ void Transform::_setScaleXY(const double new_scale, const double xn, const doubl
     zc = s / 2;
     Bc = s / 360;
     Cc = s / (2 * M_PI);
+
+    platform::notify_map_change();
 }
 
 #pragma mark - Constraints
@@ -390,6 +395,8 @@ void Transform::_setAngle(double new_angle, const time duration, bool disable_in
             transitions.emplace_front(interaction_timeout);
         }
     }
+
+    platform::notify_map_change();
 }
 
 double Transform::getAngle() const {