====== Chem5 Dataset ======

A Chem5 Dataset is a specialized [[:geoscene3d:project_content:datasets:tabular_dataset|]] containing columnar water chemistry data. A Chem5 Dataset may contain analysis of a single chemical parameter in multiple samples over a period of time. Each row in the dataset represents one analysis in time for one parameter from one screen.

The dataset is defined with a query that consists of a rectangular extent, settings for time period and chemical parameter. Chem5 Datasets are used in the [[:geoscene3d:project_content:objects:chem5_water_chemistry_object|]].

==== Source Types ====

[[:geoscene3d:project_content:sources:access_database_source|]] in [[:geoscene3d:project_content:dataformats:chem5_database_format|]].

==== Configuration ====

__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.

__Limit Time Period:__ Limits the dataset to contain analysis within a specified time period. If not checked all samples in the database i included.\\
__Begin Data:__ Starting data in the time period.\\
__End Data:__ Ending date in the time period.

__Parameter:__ Selects the chemical parameter for the time period. The list contains only parameters that have been analyzed within the extent.\\
__Update List From Extent:__ Refreshes the parameters list from extent selected above.

__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 [[:geoscene3d:project_content:dataformats:chem5_database_format|]].