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geoscene3d:project_content:datasets:vector_theme_dataset [2020/02/12 16:28] – created rebecca130301_gmail.comgeoscene3d:project_content:datasets:vector_theme_dataset [2020/03/22 18:17] (current) – external edit 127.0.0.1
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 ====== Vector Theme Dataset ====== ====== Vector Theme Dataset ======
  
-A Vector Theme Dataset is a specialized  [[Tabular Dataset|]] +A Vector Theme Dataset is a specialized [[:geoscene3d:project_content:datasets:tabular_dataset|]] containing columnar data from an [[:geoscene3d:project_content:dataformats:esri_shape_file_format|ESRI Shape File]] or possibly other formats in future versions. In addition to columnar data as in Tabular Datasets Vector Theme Dataset also contain geometric data or features. Features may be points, lines or polygons. The tabular dataset may contain any number of columns (fields).
- containing columnar data from an  [[ESRI Shape File|]] +
- or possibly other formats in future versions. In addition to columnar data as in Tabular Datasets Vector Theme Dataset also contain geometric data or features. Features may be points, lines or polygons. The tabular dataset may contain any number of columns (fields).+
  
-==== +==== Source Types ====
-Source Types   ====+
  
-[[ESRI Shape File|]] +[[:geoscene3d:project_content:dataformats:esri_shape_file_format|ESRI Shape File]] and [[:geoscene3d:project_content:dataformats:mapinfo_tab_file_format|MapInfo Tab File]] from a [[:geoscene3d:project_content:sources:file_source|]].
- and  [[MapInfo Tab File|]] +
- from a  [[File Source|]].+
  
-==== +==== Configuration ====
-Configuration  ====+
  
 Regardless of source a vector theme dataset is defined as a SQL query containing the three usual sections: SELECT, FROM, and WHERE. The configuration dialog reflects these three sections. Regardless of source a vector theme dataset is defined as a SQL query containing the three usual sections: SELECT, FROM, and WHERE. The configuration dialog reflects these three sections.
  
-** +**SELECT ** \\ 
-SELECT  ** \\ +__ID (Optional):__ Field or column name for ID.\\ 
-__ID (Optional):__ Field or column name for ID.  \\ +__Z (Optional):__ Field or column name for Z coordinates. Be sure to check the "Z = Elevation" and "Z = Depth" radio buttons. Note: If Z = Depth the Z values are converted to elevation using the designated scene terrain model surface. See [[:geoscene3d:application:project_settings|]].\\ 
-__Z (Optional):__ +__Additional fields (Optional):__ List the names of the fields that should be included in the resulting dataset. The default "*" means that all fields will be included. Warning: In joins including multiple tables this may result in a large number of fields. If this box is left blank all fields are included.
-Field or column name for Z coordinates. Be sure to check the "Z = Elevation" and "Z = Depth" radio buttons. Note: If Z = Depth the Z values are converted to elevation using the designated scene terrain model surface. See  [[Project Settings|]]. \\ +
-__Additional fields (Optional):__ +
-List the names of the fields that should be included in the resulting dataset. The default "*" means that all fields will be included. Warning: In joins including multiple tables this may result in a large number of fields. If this box is left blank all fields are included.+
  
-** +**FROM ** \\
-FROM ** \\+
 List the tables that contain the fields listed above in the SELECT box. Note: For Shape File Sources this is always the filename. List the tables that contain the fields listed above in the SELECT box. Note: For Shape File Sources this is always the filename.
  
-** +**WHERE ** \\ 
-WHERE ** \\ +__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.
-__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.
-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 makes it possible to use regular SQL to query the source within the extent. This is an advanced option that can be used for users that has an in depth knowledge of the source format.
-Additional "WHERE" conditions (optional): __ +
-The dataset may be refined further using SQL. This makes it possible to use regular SQL to query the source within the extent. This is an advanced option that can be used for users that has an in depth knowledge of the source format.+
  
-** +**Preview Buttons ** \\ 
-Preview Buttons ** \\ +__Preview SQL…:__ Shows a preview of the resulting query. Advanced users can use this option to analyze the resulting query.\\ 
-__Preview SQL...:__ +__Preview Data…:__ Shows a preview of the data resulting from the query using the [[:geoscene3d:application:data_management:dataset_viewer|]].
-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|]].+
  
  

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