====== TDV Dataset ======

A TDV Dataset represents a group of TDV (Two Dimensional Vertical) geophysical resistivity models. The dataset is defined with a query that consists of a rectangular extent and optional SQL. TDV Datasets are used in the [[:geoscene3d:project_content:objects:tdv_models_2d_geophysics_object|]].

==== Source Types ====

[[:geoscene3d:project_content:sources:access_database_source|]] in GERDA Database Format\\
[[:geoscene3d:project_content:sources:firebird_database_source|]] in GERDA Database Format

==== Configuration ====

Regardless of source a TDV Dataset is defined in the same way

__Fixed Extent:__ By default the dataset extent is identical to the current scene extent. However, this option makes it is possible to fix the extent to any area.\\
__Extent:__ Defines a rectangular area where data are extracted from the source.\\
__Additional "WHERE" conditions (optional):__ The dataset may be refined further using SQL. This is an advanced option that can be used for users that has an in depth knowledge of the GERDA Database Format.\\
__Preview SQL…:__ Shows a preview of the resulting query. Advanced users can use this option to analyze the resulting query.\\
__Preview Data…:__ Shows a preview of the data resulting from the query using the Dataset Viewer.