New Dataset

Feature Description

Used to create point, line, region, and mosaic datasets.

Feature Entry

  • Start tab->New Dataset group.
  • Context menu of a data source in the workspace->New Dataset->dataset type item.
Tip:
  • The gallery control in the New Dataset group is only available when there is an open data source in the currently opened workspace.
  • Based on the selected dataset type for creation, the new dataset list in the New Dataset dialog will prioritize displaying the selected type. The New Dataset dialog can create multiple datasets of the same or different types at once.

Steps

Taking creating a region dataset as an example, the steps are as follows:

  1. Click Start->New Dataset group, select Polygon, and the New Dataset dialog will pop up.
  2. Set information such as the new dataset name, target data source, and type in the dialog's list.
    • Target data source: Used to set the target data source where the new dataset is located. Its drop-down button menu lists the aliases of all open data sources in the currently opened workspace. You can select one of them to specify the target data source for the new dataset.
    • Type: Defaults to the dataset type corresponding to the function control you initially clicked, here it is Polygon type. You can reselect the type of the target dataset through its drop-down button.
    • Dataset name: Used to set the name of the new dataset, you can double-click the cell to rename it. For valid dataset naming rules, see Dataset Naming Rules.
    • Add to map: By default, not added. You can select any option from the drop-down button: No, New Map, or Current Map (displayed when there is an open map in the current workspace). If you select New Map, the dataset will be added to a new map after creation; if you select Current Map, the dataset will be added to the currently open map.
  3. After setting the parameters in the list, you can select whether to use a template to create the dataset on the right side of the dialog. The specific parameter descriptions are as follows:
    • No Template: Requires setting the encode type, character set, and coordinate system for the dataset.
      • Encode type: This can only be set when the new dataset type is line or region dataset. The encode type of the dataset is the compression encode type during dataset storage. For details, see: Dataset Compression Encode Type.
      • Character set: You can select a suitable character set for the new dataset. For the standard version of the desktop product, the character set defaults to ASCII (Default); for the Unicode version of the desktop product, it defaults to UTF-8. For supported character sets and their descriptions, see: Character Set List.
      • Coordinate system settings: Supports setting the coordinate system for new datasets. The default coordinate system is consistent with the data source coordinate system. For an introduction to coordinate system settings, see: Projection Settings.
    • Use Template: After specifying a template dataset, you can create the dataset based on the template. The table structure and most properties of the created dataset are consistent with the template dataset, such as projection and character set.
      Tip:

      The bounds of the newly created dataset are 0, the spatial index is no spatial index, and the object count is zero.

    • Storage method: Displays the storage method of the dataset, which is SuperMap, a custom storage method of SuperMap.
    • SmID type: If the data source for storing the dataset is a PostGIS database data source, you can choose between int and long types.
    • Coordinates include M values: When creating a vector dataset, checking the "Coordinates include M values" option adds an independent M value attribute to the geometry, supporting the storage of non-spatial measurement data such as mileage, time, and pressure. By default, it is not checked.
      • M value (Measurement Value) is an additional coordinate dimension of geometry, used to store additional measurement information related to the geometric shape. It is usually parallel to X (longitude), Y (latitude), and Z (elevation), but independent of spatial coordinates, specifically used to represent some linear reference system (LRS) or dynamic measurement data.
      • Difference between M value and X/Y/Z
        • X/Y: Represent geographic spatial location (such as longitude and latitude or projected coordinate).
        • Z: Represents elevation or vertical dimension.
        • M: Represents dynamic measurement values related to the geometric shape (such as time, mileage, temperature, etc.), independent of location.
      • Typical application scenarios for M values:

        • Linear reference system (LRS)

          • Road management: Store highway mileage pile data (e.g., M=0, 100, 200) for accident location and facility management.

          • Railway/waterway: Record mileage markers along the route for stations or navigation marks.

        • Dynamic attribute binding

          • Pipeline monitoring: Embed pressure and flow values (M=pressure value) at pipeline vertices to support segment analysis.

          • Movement trajectory: Attach timestamps (M=time) to trajectory points to achieve spatiotemporal path analysis.

        • Engineering and geographic analysis

          • Dynamic segmentation: Map attribute data to M value intervals of line features (e.g., count pollutant concentration in a river segment with M=100-200).

          • Dynamic labeling: Display location labels based on M values (e.g., "150 meters from the start point").

  4. After completing all settings for the new dataset, click the OK button at the bottom of the New Dataset dialog to complete the operation of creating a new dataset.
Notes:
  • If you select multiple data sources in the data source node of the workspace manager, after clicking the button control in the New Dataset group, the default target data source is the topmost data source among the selected ones.
  • Dataset naming rules:
    1. Composed of Chinese characters, letters, numbers, and underscores, but cannot start with a number or underscore.
    2. The length cannot be zero and cannot exceed 59 characters, meaning 59 English letters or 59 Chinese characters. If the dataset name exceeds 59 characters, the excess part will be automatically truncated.
    3. Cannot contain illegal characters, such as spaces, parentheses, etc.
    4. Cannot conflict with reserved fields of various databases.

Related Topics

Save As/Delete/Close Dataset

Rename/Refresh Dataset

Copy Dataset