Discover forestry research datasets
The Trees4Future Clearinghouse supports the discovery of forestry research data through a semantic search function. The result list shows the discovered datasets and its most relevant properties, sorted by relevance. The full details can be accessed through the link implemented under the dataset’s name field. If the dataset supports access to the data, links are supplied that allow a user to access the dataset either by download of the dataset itself, visualisation of the dataset (e.g. a spatial map) or access to a reference of a contact person.
The following search options are available:
Keyword search (What?)
The keyword search field allows to enter one or more keywords that will be used to perform a semantic search query. Multi-word terms can be entered between quotes to be handled as a single term instead of separate terms. The function also provides an auto complete option, providing a list of available terms matching with the string typed by the user.
Spatial search (Where?)
The spatial search option allows the user to define a geographic extent through the map interface of the GUI. The selected map extent is automatically translated to the geographical coordinates of the extent. The provided condition will result in selection of datasets that “match” with the extent. Depending on the selection of the option overlap or within, a match is either a dataset with an extent (or coordinate in case of point data) which is fully included in the search extent or (partly) overlaps the search extent.
Temporal search (When?)
Temporal search allows adding a temporal condition as part of the semantic query. Either a time period or a single (start)date can be entered. In the case of a time period, the search will return the datasets that are either fully inside the defined time period or that have a temporal overlap. Entering a start date only will return all datasets that have a start date earlier than the provided start date and an end date later than the provided start date, so datasets that contain data on the provided date.
**** Entering an end date only will return all datasets that have a start date earlier than the provided end date and an end date later than the provided start date.
Matching datasets are displayed in the result list. The result list shows the most relevant properties of the discovered datasets. The full details of the provided metadata are available through the link implemented under the name field. Moreover If the dataset supports access to the data, links are supplied that allow a user to access the dataset either by download of the dataset itself, visualisation of the dataset (e.g. a spatial map) or access to a reference of a contact person.