From fe649c81ebc19d972eea1d3cc5285c504f981e5b Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Mon, 23 Mar 2026 22:05:57 +0000
Subject: [PATCH] Change region to use top-left and bottom-right coordinates

Replace center+delta region representation with a bounding box defined
by topLeft and bottomRight coordinate pairs, which maps more directly
to the visible map area.

https://claude.ai/code/session_0162emnCi1KxW5FkTNn2ZrvH
---
 schema.graphqls                                |  6 ++----
 src/entities/SharedEntities.ts                 |  6 ++----
 src/index.ts                                   |  6 ++----
 .../__tests__/SystemResolverTests.test.ts      | 18 ++++++++++--------
 testHelpers/apolloTestServerHelpers.ts         |  6 ++----
 5 files changed, 18 insertions(+), 24 deletions(-)

diff --git a/schema.graphqls b/schema.graphqls
index d114e1a..54a2de4 100644
--- a/schema.graphqls
+++ b/schema.graphqls
@@ -18,10 +18,8 @@ type System {
 }
 
 type Region {
-  latitude: Float!
-  longitude: Float!
-  latitudeDelta: Float!
-  longitudeDelta: Float!
+  topLeft: Coordinates!
+  bottomRight: Coordinates!
 }
 
 type ParkingSystem {
diff --git a/src/entities/SharedEntities.ts b/src/entities/SharedEntities.ts
index e24f31a..af7b090 100644
--- a/src/entities/SharedEntities.ts
+++ b/src/entities/SharedEntities.ts
@@ -12,9 +12,7 @@ export interface ICoordinates {
 }
 
 export interface IRegion {
-  latitude: number;
-  longitude: number;
-  latitudeDelta: number;
-  longitudeDelta: number;
+  topLeft: ICoordinates;
+  bottomRight: ICoordinates;
 }
 
diff --git a/src/index.ts b/src/index.ts
index 24bfeb3..d709b1d 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -26,10 +26,8 @@ const supportedSystems: InterchangeSystemBuilderArguments[] = [
     useSelfUpdatingEtas: true,
     shuttleStopArrivalDegreeDelta: 0.001,
     initialRegion: {
-      latitude: 33.7937,
-      longitude: -117.8531,
-      latitudeDelta: 0.01,
-      longitudeDelta: 0.01,
+      topLeft: { latitude: 33.7987, longitude: -117.8581 },
+      bottomRight: { latitude: 33.7887, longitude: -117.8481 },
     },
   }
 ]
diff --git a/src/resolvers/__tests__/SystemResolverTests.test.ts b/src/resolvers/__tests__/SystemResolverTests.test.ts
index a345469..502ed92 100644
--- a/src/resolvers/__tests__/SystemResolverTests.test.ts
+++ b/src/resolvers/__tests__/SystemResolverTests.test.ts
@@ -40,10 +40,14 @@ describe("SystemResolvers", () => {
     query GetSystemInitialRegion($systemId: ID!) {
       system(id: $systemId) {
         initialRegion {
-          latitude
-          longitude
-          latitudeDelta
-          longitudeDelta
+          topLeft {
+            latitude
+            longitude
+          }
+          bottomRight {
+            latitude
+            longitude
+          }
         }
       }
     }
@@ -56,10 +60,8 @@ describe("SystemResolvers", () => {
       expect(response.body.singleResult.errors).toBeUndefined();
       const initialRegion = (response.body.singleResult.data as any).system.initialRegion;
       expect(initialRegion).toEqual({
-        latitude: 33.7937,
-        longitude: -117.8531,
-        latitudeDelta: 0.01,
-        longitudeDelta: 0.01,
+        topLeft: { latitude: 33.7987, longitude: -117.8581 },
+        bottomRight: { latitude: 33.7887, longitude: -117.8481 },
       });
     });
   });
diff --git a/testHelpers/apolloTestServerHelpers.ts b/testHelpers/apolloTestServerHelpers.ts
index e8d721c..4d0e8ad 100644
--- a/testHelpers/apolloTestServerHelpers.ts
+++ b/testHelpers/apolloTestServerHelpers.ts
@@ -27,10 +27,8 @@ const systemInfoForTesting: InterchangeSystemBuilderArguments = {
   useSelfUpdatingEtas: false,
   shuttleStopArrivalDegreeDelta: 0.001,
   initialRegion: {
-    latitude: 33.7937,
-    longitude: -117.8531,
-    latitudeDelta: 0.01,
-    longitudeDelta: 0.01,
+    topLeft: { latitude: 33.7987, longitude: -117.8581 },
+    bottomRight: { latitude: 33.7887, longitude: -117.8481 },
   },
 };