![]() When you have a data connection, caching tiles greatly improves your experience because it increases the speed at which tiles load, providing a more consistent result as you move around the map. Cached tiles are tiles that are temporarily stored in CalTopo’s cache so that they can be quickly retrieved as you zoom in and out and pan around the map. This is because you are viewing cached layer tiles. ![]() Sometimes you may be able to view layers offline without downloading them first. However, when you don't have a data connection, you need to download layers for the map area to your mobile device in order to view and navigate around that particular map. When you have a data connection, you can access those base layers and overlays in the Map Layers menu. Whether you have a data connection or not, you need to view those map objects on top of base layers and overlays (such as the MapBuilder Topo base layer or the Public Lands overlay) in order to provide geographic reference. ![]() The reason that you need to download layers is because what we call a “map” in CalTopo is actually just saved map objects at specific coordinates. If you are looking for instructions on how to download layers for offline use on the desktop app, those can be found in the Download and Sync lesson in the CalTopo Desktop chapter. Please note: Downloading layers on the mobile app is a completely different process from downloading layers on the desktop app. Why Do I Want to Delete Downloaded Layers?.The purpose of this lesson is to walk you through the steps for setting up the mobile app for offline use. However, if you wish to use the mobile app offline (which means in an area with no cell service or WiFi) then you will need a paid subscription. You can download and use the mobile app for free from the Apple or Google Play Store. Mutual Aid Incidents (Formerly Events) Quick Guidesīuilt with Grav - The Modern Flat File CMS.Course: CalTopo (SARTopo) for Incident Response. ![]()
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