====== Contour Lines ====== 
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This page describes how use the extension "Contour Lines".\\
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**Feature Extraction Basic - Standard - Pro, Publisher Client**\\
{{orbitgis:how_to_find.png?25&nolink|}} [[206:desktop:workspace:main_toolbar|Main Toolbar]] > Extensions > Contour Lines\\



The "Contour Lines" extension makes it possible to create a dataset with contour lines from a point cloud dataset.



==== Concepts ====


**Contour lines vector file**\\
Creating a contour lines dataset based on an [[206:technology:supported_formats:pointcloud:opc|]] produces a vector file containing contour lines with a consecutive distance. \\
The target dataset can easily be exported to any [[206:technology:supported_formats:index|supported vector format]].


**Files & folders**\\
All created files and folders are saved in a new folder <name-of-opc-file>.contourlines inside the "pointcloud" folder of the run.

==== Sidebar ====

{{ :170:desktop_ext:contourlines_sidebar_16.png?nolink|}}

=== Project ===

**Select Pointcloud Dataset**\\
Displays the available opc files in the Dataset List, from which to choose the one on which the contour lines while be creating when pressing **Calculate**.

**File menu drop-down**\\
Choose where you want to store the Contour Lines results. A project represents an automatically created destination folder inside your runs pointcloud folder.\\
For each Contour Line extraction a new project will be created. Writing new data in an existing project will overwrite existing data in that folder.\\
Options to create a new project, open a recent project, close or delete a project are available.

=== Calculate ===

**Step**\\
Adjust consecutive distance of the contour lines (in metres).

**Start**\\
Press to start the Contour lines generation.