diff --git a/web/src/data/activities.ts b/web/src/data/activities.ts
new file mode 100644
index 0000000..a05d767
--- /dev/null
+++ b/web/src/data/activities.ts
@@ -0,0 +1,24 @@
+import type { Activity } from '../types/activity';
+
+export const activities: Activity[] = [
+  {
+    id: 'walking',
+    name: 'Gåtur',
+    description: 'En rolig tur utendørs.',
+  },
+  {
+    id: 'cycling',
+    name: 'Sykkeltur',
+    description: 'En tur på sykkel.',
+  },
+  {
+    id: 'running',
+    name: 'Løping',
+    description: 'Løping eller jogging utendørs.',
+  },
+  {
+    id: 'skiing',
+    name: 'Skitur',
+    description: 'Langrenn eller annen aktivitet på ski.',
+  },
+];
\ No newline at end of file
diff --git a/web/src/data/cities.ts b/web/src/data/cities.ts
new file mode 100644
index 0000000..df23203
--- /dev/null
+++ b/web/src/data/cities.ts
@@ -0,0 +1,34 @@
+import type { City } from '../types/city';
+
+export const cities: City[] = [
+  {
+    id: 'oslo',
+    name: 'Oslo',
+    latitude: 59.9139,
+    longitude: 10.7522,
+  },
+  {
+    id: 'bergen',
+    name: 'Bergen',
+    latitude: 60.3913,
+    longitude: 5.3221,
+  },
+  {
+    id: 'trondheim',
+    name: 'Trondheim',
+    latitude: 63.4305,
+    longitude: 10.3951,
+  },
+  {
+    id: 'stavanger',
+    name: 'Stavanger',
+    latitude: 58.97,
+    longitude: 5.7331,
+  },
+  {
+    id: 'tromso',
+    name: 'Tromsø',
+    latitude: 69.6492,
+    longitude: 18.9553,
+  },
+];
\ No newline at end of file
diff --git a/web/src/type/activity.ts b/web/src/type/activity.ts
new file mode 100644
index 0000000..65280d1
--- /dev/null
+++ b/web/src/type/activity.ts
@@ -0,0 +1,11 @@
+export type ActivityId =
+  | 'walking'
+  | 'cycling'
+  | 'running'
+  | 'skiing';
+
+export interface Activity {
+  id: ActivityId;
+  name: string;
+  description: string;
+}
\ No newline at end of file
diff --git a/web/src/type/city.ts b/web/src/type/city.ts
new file mode 100644
index 0000000..fca4ad6
--- /dev/null
+++ b/web/src/type/city.ts
@@ -0,0 +1,6 @@
+export interface City {
+  id: string;
+  name: string;
+  latitude: number;
+  longitude: number;
+}
\ No newline at end of file
diff --git a/web/src/type/weather.ts b/web/src/type/weather.ts
new file mode 100644
index 0000000..eb38e1e
--- /dev/null
+++ b/web/src/type/weather.ts
@@ -0,0 +1,11 @@
+export interface WeatherData {
+  cityId: string;
+  time: string;
+  temperature: number;
+  apparentTemperature: number;
+  humidity: number;
+  precipitation: number;
+  weatherCode: number;
+  windSpeed: number;
+  isDay: boolean;
+}
\ No newline at end of file