Concept of Dataset
A dataset is one of the basic organizational units of spatial data in SuperMap GIS. It is the smallest unit of data organization. A dataset can be visualized as a layer in a map. Visual editing of a dataset is also achieved through the map, such as editing the spatial position and shape of geometry in the dataset or obtaining a new dataset through vectorization.
All datasets opened in the workspace are stored in the data source, independent of the workspace.
For raster and image datasets, they are displayed as images in the map based on their stored pixel values.
A data source can contain multiple datasets of various types. You can manage the datasets in the data source through the data source in the workspace, including creating datasets or importing data from other sources as datasets, as well as other operations.
For more information on GIS data, please refer to Introduction to GIS Data.
Types of Dataset
The dataset types in SuperMap GIS include: point dataset (Point), multipoint dataset (MultiPoint), line dataset (Line), region dataset (Region), tabular dataset (Tabular), network dataset (Network), CAD Dataset (CAD), text dataset (Text), route dataset (LineM), image dataset (Image), raster dataset (Grid), model dataset (Model), video dataset (Video), mosaic dataset (Mosaic), LAS dataset, and 3D point, line, and region datasets.
Notes:When using a multipoint dataset, the applicable functions and limitations are detailed below:
- Data management and editing: Supports operations such as creation, deletion, modification of dataset properties, query, import/export, but does not support editing operations.
- Data processing and analysis: Supports the calculate geometry attributes function, but does not support others.
- Cartography: Supports adding the multipoint dataset to the map for display, with layer capabilities consistent with regular point layers. Multipoint datasets only support creating unique value thematic maps, graduated color thematic maps, and uniform label thematic maps.
- Map tiles: Supports generating raster tiles, but does not support generating vector tiles. If there is a multipoint layer in the map, it must be removed when generating vector tiles.
- 3D display: Supports adding to the scene, displayed in solid color.
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