Differences

This shows you the differences between two versions of the page.

--- en:help:v2:maps:file-based-calibrate [2019/10/17 13:34] – alpinequest
+++ en:help:v2:maps:file-based-calibrate [2019/10/17 14:23] – alpinequest
@@ Line 19: / Line 19: @@
 For each calibration point:
   * Tap the button of this calibration point {{:icon_06.png?nolink}} to select the arrows icon. In this state, you'll be able to move the calibration within the image to calibrate;
-  * Tap and old the arrows icon on the map, and move the calibration point over a map feature that is clearly visible on both the base map and the image to calibrate. Here for example, we choose a railroad crossing.
+  * Tap and old the arrows icon on the map {{:icon_07.png?nolink}}, and move the calibration point over a map feature that is clearly visible on both the base map and the image to calibrate. Here for example, we choose a railroad crossing;
+  * Tap the button of this calibration point {{:icon_06.png?nolink}} again to select the padlock icon. In this state, you'll be able to move the image over the base map;
+  * Reduce the opacity of the image to calibrate using the opacity slider {{:icon_08.png?nolink}} to make the base map visible, and move the calibration point to the correct location {{:icon_08.png?nolink}} on this one. Only pay attention to the point to calibrate and ignore other features around: they will only match when the four calibration points are correctly placed.
-{{:icon_help.png?nolink}} Be careful to choose a map feature that is stable and small enough: a railroad crossing, a church, an historical building, etc. Note that some features like riverbeds are not stable enough: they can move with the time.
+Repeat those steps for the three other calibration points.
+{{:icon_help.png?nolink}} Be careful to choose a map feature that is stable across the two maps and small enough: a railroad crossing, a church, an historical building, etc. Note that some features like riverbeds are not stable: they can move with time.
 {{ :en:help:v2:maps:file-based-calibrate-3.jpg?nolink }}
+In case you make a change by inadvertence, you can use the ''"**Undo**"'' {{:icon_10.png?nolink}} icon to cancel the last action.
+When the four calibration points are correctly placed, tap the ''"**Close**"'' {{:icon_11.png?nolink}} icon to terminate the calibration process.