Differences

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--- en:help:v2:elevations [2018/01/25 17:30] – alpinequest
+++ en:help:v2:elevations [2018/12/07 17:44] – alpinequest
@@ Line 1: / Line 1: @@
-<sub>[[en:help|Online Help]] > [[en:help:v2|AlpineQuest 2.x]] > [[en:help:v2:maps|Maps & Layers]]</sub>
+<sub>[[en:help|Online Help]] > [[en:help:v2|AlpineQuest 2.x]] > [[en:help:v2:maps|Maps & Layers]] > Digital Elevation Model (DEM)</sub>
 ====== Digital Elevation Model (DEM) ======
@@ Line 5: / Line 5: @@
 The application is able to download and store elevation values of remote locations and let you use them in various ways, even while being offline.
-Those elevations come from various sources including the SRTMGL1(v3) database and are currently available between latitude 56°S and 60°N with a precision of 1″ (arc-second).
+Those elevations come from various sources including the SRTMGL1(v3) database and are currently available between latitude 56°S and 60°N with a precision of 1″ (1 arc-second).
 \\
@@ Line 57: / Line 57: @@
 \\
 When [[en:help:v2:landmarks:local-track-create|manually drawing a path]] or [[en:help:v2:landmarks:auto-routing|automatically drawing a path along roads]] over an area with elevation values stored, you can get the elevation profile and gain of that path:
-  * Click anywhere on the path {{:icon_01.png?nolink}} and select its name {{:icon_02.png?nolink}};
+  * Tap anywhere on the path {{:icon_01.png?nolink}} and select its name {{:icon_02.png?nolink}};
   * Select ''"**Details**"'' {{:icon_03.png?nolink}} and check the ''"**Statistics**"'' {{:icon_04.png?nolink}} part.
 {{ :en:help:v2:landmarks:auto-routing-4.jpg?nolink }}
+\\
+===== How to delete stored elevation data? =====
+\\
+In order to delete the elevation data stored on your device:
+  * Tap on the "''**Elevation data coverage**''" menu icon {{:icon_01.png?nolink}};
+  * Select "''**Clear data**''" {{:icon_03.png?nolink}};
+  * Tap "''**Ok**''" {{:icon_04.png?nolink}} to confirm;
+Independently, you can delete the data used by maps and layers generated from the stored elevation data. To do so, select the menu icon {{:icon_02.png?nolink}} of the map you want to delete the data.
+{{ :en:help:v2:maps:elevations-clear.jpg?nolink }}
 \\
@@ Line 76: / Line 89: @@
 {{:icon_help.png?nolink}} If your own data doesn't cover a requested area, the application will automatically download the missing data in its own format which may interfere with your own data. Be sure to turn off the automatic download of elevation data (see first paragraph).
+\\
+===== Problems with elevation data =====
+\\
+**What if I get error messages when using elevation data?**\\
+It's likely because the elevation data storage is corrupted. Most of the time, this is due to "cleaning/optimizing" applications that delete parts of the storage (usually the biggest files) and claim to have freed space. If you use such application, be sure to correctly setup it. To fix the errors, you need to [[en:help:v2:elevations#how_to_delete_stored_elevation_data|clean up the stored elevation data]].