Setting Map Projection

Instructions for use

The Earth is an ellipsoid, while a map is a flat entity. Map projection is the process of converting a three-dimensional entity into a two-dimensional plane. Map projection defines methods and rules for this conversion. SuperMap supports setting and managing the coordinate projection of maps in the current workspace.

Function Entry

  • Map Tab -> Properties -> Map Properties button -> Coordinate System node.
  • Map Context Menu -> Properties -> Coordinate System node.

Operation Steps

You can set the map coordinate system through the toolbar, as detailed below:

  1. Reset Coordinate System: Click the "Reset Coordinate System" button, select "More" from the dropdown menu, and set the target projection in the "Coordinate System Settings" dialog. For detailed operations on coordinate system settings, refer to Projection Settings.
  2. Copy Coordinate System: Click the "Copy Coordinate System" button, and the "Copy Coordinate System" dialog pops up. You can choose to copy from a data source or from a dataset:
    • From Data Source: Select the "From Data Source" radio button, click the drop-down button of the combo box, select a data source, and set the coordinate system settings of the data source as the target coordinate system.
    • From Dataset: Select the "From Dataset" radio button, click the drop-down button of the combo box, select a dataset, and set the coordinate system settings of the dataset as the target coordinate system.
  3. Import Coordinate System: Click the "Import Coordinate System..." button, in the pop-up "Select" window, select a projection info file and import it. Supports importing Shapefile projection info files (*.shp;*.prj), MapInfo Exchange Format (*.mif), MapInfo TAB File (*.tab), image format projection info files (*.tif;*.img;*.sit), and projection info files (*.xml).
  4. Export Coordinate System: Click the "Export Coordinate System..." button to export the coordinate information of the current map as a projection info file (*.xml).
  5. Transformation Parameters: Click the "Transformation Parameters" button, in the pop-up "Parameter Settings" window, set transformation parameters to project the current map projection. For details, refer to the description of Projection Transformation Parameters.
  6. Dynamic Projection: Check the "Dynamic Projection" checkbox to enable dynamic projection for the current map. Refer to Enable Dynamic Projection.

Related Topics

About Map Projection

Map Projection Types

Commonly Used Map Projections

How to Select Map Projection

Enable Dynamic Projection