====== Flightplan Wizard : Define Area to Cover ======

Defining the area to cover is done in a few steps :
  - Move to the area in interest
  - Draw a "construction line" that can be used as strip orientation.
  - Define an area to fly.

===== Define Strip Orientation =====

Define the strip orientation by using the construction line function.

{{select_orientation_line_feature.jpg|Select the strip orientation line feature}}

Create the line by selectiong two points.\\ 
As a result you will see a blue line representing the strip orientation:

{{map_with_flight_or_strip_direction.jpg|Map showing the flight or strip orientation.}}

===== Define an Area to fly =====


==== Irregular Areas ====

To define an irregular area, press the first button and define the closed area by selecting different points:

{{define_irregular_area.jpg|Define irregular area.}}

{{the_irregular_area_in_orbitgis.jpg|The irregular area in OrbitGIS.}}

To finish the creation of the area press the right mouse button on the last point, and select 'Stop' in the mouse menu:

{{how_to_end_the_area_defintion.jpg|How to end the creation of the irregulra area.}}


==== Rectangular Areas ====

To define a rectangular area: 
  - first delete the previsously created area using {{delete_fence_area.jpg|:orbitgis:coverage:delete_fence_area.jpg}}
  - press the second button and define the area by creating a rectangle that will be exactly parallel to the given strip orientation. 

{{define_rectangle_area.jpg|Define a rectangle area.}}

Select the first point and drag the mouse while the left mouse button is pressed to define the rectangle.
<note>If you made a very small area by mistake, please clear that area first before continuing the creation of a new area. It is prohibited to have more than one area defined for further calculations.</note>

{{the_rectangle_area_in_orbitgis.jpg|OrbitGIS with a rectangle area.}}

===== Clearing =====

To recreate the strip orientation or coverage area use the next buttons to delete

{{delete_strip_orientation_or_area.jpg|Delete Strip Orientation or Area.}}

<note important>It is especially important to remove all areas when re-creating the area to fly.  Having multiple areas will lead problems because they will all be used.  When areas overlap, they effectively create gaps. </note>