====== Dataset Legend Editor ======

[[111:orbitgis:datasets:legend:topics|{{  :orbitgis:topics.png?|}}]]

Define and save the dataset legend, the presentation of the spatial objects using the Legend Editor.

{{:orbitgis:entrance_icon_2.png?nolink&25  |}} [[111:orbitgis:datasetlist:index|Datasetlist]] > [[111:orbitgis:datasetlist:dataset:context_menu|Dataset Context Menu]] > [[111:orbitgis:datasets:index|Dataset Properties]] > Legend Edtior \\ Datasetlist > Dataset Context Menu > Legend Edtior

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===== Legend File and Concept =====

{{  legend_overview.png?nolink  |}}

<note tip>One dataset has one legend file, but each [[111:technologies:basic_concepts:dataset_structure|dataset model]] has its own legend component to be set separately. \\ 
The legend component depends on the spatial object type (points lines or areas).</note>

Spatial resources (vector, raster, image) do not include legend or layout information. Orbit stores the "layout component" in a separated [[111:technologies:resources:other:olg|Orbit Legend File]] (*.olg). \\
By default Orbit will search and use automatically the .olg file in the same folder and having the same name as the spatial resource file. We do advise this default naming, but this is not mandatory. For example it can be useful to have different presentations for one dataset. 

  * {{:43:orbitgis:data:editing:constructions:con_new.gif?20x20&nolink}}{{:43:orbitgis:data:editing:constructions:con_open.gif?20x20&nolink}}{{:43:orbitgis:data:editing:constructions:con_save.gif?20x20&nolink}}{{:43:orbitgis:data:editing:constructions:con_save_as.gif?20x20&nolink}} : Clear the dataset legend, open and apply, save or save the dataset legend as new Orbit Legend file. 
  * Edit Legend for Model : Select the dataset model for which you would like to set the legend component.


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===== Legend Components =====

<note tip>
**Basic Appearance**  = **one presentation for all objects** within the dataset model. \\
**Classification**  = **different presentation of objects** in one dataset **based on their attribute component**. 

A Classification will overrule the Basic Appearance. \\
All graphical parameters that are not defined by a Classification will be set through the Basic Appearance.
</note>

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^ [[111:orbitgis:datasets:legend:general_settings|]] ^ The appearance of models within the dataset and scale ranges for spatial or layout objects ^

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^ [[111:orbitgis:datasets:legend:basic_appearance:index|]] ^ General information and overview of the Basic Appearance ^
| [[111:orbitgis:datasets:legend:basic_appearance:point|]] | Adding symbols, choosing [[111:orbitgis:datasets:legend:parameters:symbol_library|symbol library]] for point objects |
| [[111:orbitgis:datasets:legend:basic_appearance:line|]] | Choosing a linestyle, adding symbols to line objects |
| [[111:orbitgis:datasets:legend:basic_appearance:area|]] | Appearance of outline and fill for area objects. Adding a gradient, a texture of hatchlines to the fill |
| [[111:orbitgis:datasets:legend:basic_appearance:image|]] | Transparency, adjusting colors or using a transparent color for images |
| [[111:orbitgis:datasets:legend:basic_appearance:image_bw|]] | Transparency, adjusting colors or using a transparent color for black and white images |
| [[111:orbitgis:datasets:legend:basic_appearance:raster|]] | Transparency, adjusting colors or using a transparent color for raster images |

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^ [[111:orbitgis:datasets:legend:classification:index]] ^ Adjusting the graphical appearance of spatial objects to attribute values ^
| [[111:orbitgis:datasets:legend:classification:classes|]] | Make a Classification where the graphic parameter is based on the content of the attribute, divided in classes |
| [[111:orbitgis:datasets:legend:classification:direct|]] | Make a Classification where the graphic parameter is based on the content of the attribute, that should have exactly the same value as the value(s) of the graphic parameter |

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^ [[111:orbitgis:datasets:legend:labels]] ^ Display attribute values  as text ^

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^ [[111:orbitgis:datasets:legend:pie_chart:index|Pie Charts]] ^ Visualise attribute values in a pie chart diagram ^
| [[111:orbitgis:datasets:legend:pie_chart:appearance|]] | Managing the appearance of the Pie Chart |
| [[111:orbitgis:datasets:legend:pie_chart:examples|Pie Chart Examples]] | Examples of using Pie Charts|