Layers Metadata

In GeoNode special importance is given to Metadata and their standard formats. You can explore the Metadata of a Layer by clicking the Metadata Detail button from the Layer Page.

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The Layer Metadata Detail button

The Layer Metadata page will be displayed.

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The Layer Metadata Details

In that page you can see the whole set of available metadata about the layer. Metadata are grouped in order to show the following types of information:

  • Identification to uniquely identify the layer (Title, Abstract, Publication Date etc.);

  • Owner, the user who owns the layer;

  • Information, the Identification Image, the Spatial Extent, Projection System and so on;

  • Features, Language, Supplemental and other Information;

  • Contact Points, the available user to get in contact;

  • References, various links to the resource information and data;

  • Metadata Author, information about the author of the metadata.

Downloading Metadata

The Download Metadata button of the Layer Page allows you to download the layer metadata in various formats.

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How to Download Metadata

The available download formats are grouped in three categories:

  • Full metadata

  • Standard Metadata - XML format

  • Attribute Information

Click on the format name that you prefer to start the download.

Metadata Wizard

Metadata contains all the information related to the layer. They provide essential information for its identification and its comprehension. Metadata also make the layer more easily retrievable through search by other users.
The Metadata of a layer can be changed through a Wizard which involves four steps, one for each type of metadata considered:

  • Basic Metadata

    The first two steps are mandatory (no layers will be published if the required information are not provided) whereas the last two are optional.

    ../../_images/basic_layer_metadata.png

    Basic Layer Metadata

    In the first step the system asks you to insert the following metadata:

    • The Thumbnail of the layer (click Edit to change it);

    • The Title of the layer, which should be clear and understandable;

    • An Abstract; brief narrative summary of the content of the Layer

      Note

      The Abstract panel allows you to insert HTML code through a wysiwyg text editor

    • The Creation/Publication/Revision Dates which define the time period that is covered by the layer;

    • The Keywords, which should be chosen within the available list. The contributor search for available keywords by clicking on the searching bar, or on the folder logo representing, or by entering the first letters of the desired word;

    • The Category which the layer belongs to;

    • The Group which the layer is linked to.

  • Location and Licenses

    ../../_images/location_licenses_layer_metadata.png

    Location and Licenses Metadata for Layers

    The following list shows what kinds of metadata you are required to enter (see also the picture below):

    • The Language of the layer;

    • The License of the dataset;

    • The DOI of the dataset; if available, this represents the Digital Object Identifier of the resource

    • The Attribution of the dataset; authority or function assigned, as to a ruler, legislative assembly, delegate, or the like

    • The Regions, which informs on the spatial extent covered by the layer. Proposed extents cover the following scales: global, continental, regional, national;

    • The Data Quality statement (general explanation of the data producer’s knowledge about the lineage of a dataset);

    • Potential Restrictions on layer sharing.

      Note

      The Data Quality statement and Restrictions panels allow you to insert HTML code through a wysiwyg text editor

  • Optional Metadata

    ../../_images/optional_layer_metadata.png

    Optional Layer Metadata

    Complementary information are:

    • The Edition to indicate the reference or the source of the layer;

    • The Purpose of the layer and its objectives;

    • Any Supplemental information that can provide a better understanding of the uploaded layer;

    • The Maintenance frequency of the layer;

    • The users who are Responsible for the layer, its Owner, and the Author of its metadata;

    • The Spatial representation type used.

      Note

      The Purpose and Supplemental information panels allow you to insert HTML code through a wysiwyg text editor

  • Dataset Attributes

    ../../_images/dataset_attributes_layer_metadata.png

    Dataset Attributes Metadata for Layers

    At this step you can enrich the dataset attributes with useful information like the following:

    • The Label displayed

    • A detailed Description

    • The Display Order

    • The Display Type; the default value is Label, which means that the value of the attribute will be rendered as a plain text. There’s the possibility to instruct GeoNode to threat the values as different media-types. As an instance, if the values of the selected attribute will contain image urls, by selecting the IMAGE Display Type you will allow GeoNode to render the image directly when querying the layer from the maps. The same for VIDEO, AUDIO or IFRAME mime types.

    • The Visibile flag; allows you to instruct GeoNode wether or not hiding an attribute from the Get Feature Type outcomes

    It is possible to define a completely custom HTML template for the Get Feature Type outcome. That is possible by enabling the Use a custom template flag as shown in the figure below.

    ../../_images/dataset_attributes_layer_metadata_custom_ft.png

    Use a custom template

    By using the keywork ${properties.<attribute_name>, you can tell to GeoNode to render the actual value of the attribute on the map.

    As an instance, the example below

    ../../_images/dataset_attributes_layer_metadata_custom_ft_html.png

    Use a custom template: HTML

    Will render an HTML Table along with values as shown here below

    ../../_images/dataset_attributes_layer_metadata_custom_ft_outcome.png

    Use a custom template: Get Feature Info outcome

Use next >> or << back to navigate through those steps. Once you have finished click on Update.

Some metadata are mandatory, if you miss any of that metadata the Completeness bar shows you a red message like the one in the picture below.

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Completeness Progress Bar

Metadata Advanced Editing

In the Layer Editing panel the Advanced Edit is also available.

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The Advanced Edit button

Click on it to display the Metadata Advanced Editing Page. That page allows you to edit all the layer metadata described in the previous paragraph. Once you have finished to edit them click on Update to save your changes.

Uploading Metadata

Users may also upload a metadata XML document (in ISO, FGDC, or Dublin Core format) to fill in key GeoNode metadata elements automatically. The picture below shows you how the page looks like.

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The Metadata Advanced Editing page

Click on Choose Files to select the document from your disk, then click on Upload files to trigger the uploading process.