Generate DOMDSM Data

Instructions for use

DOM (Digital Orthophoto Map), namely digital orthophoto map, is a kind of Image Data generated by using data technology to process aerial photographs or Remote Sensing Imagery to eliminate topographic relief images and crop them according to a certain Map Range. DSM (Digital Surface Model) refers to the Model Data that contains the elevation information of all the elements on the ground, such as buildings, bridges, trees, etc.

The Generate DOMDSM function can generate the S3MTile Data in the current scene into DOM and DSM Data at the same time, that is, generate DOM and DSM Data according to the data indexed by the *.scp file.

Function entrance

  • 3D Analysis Tab-> OSGB Group-> Generate DOMDSM

Operation steps

  1. New scene or open the existing scene, load S3MTile Data that needs to Generate DOM and DSM through the Load 3D Tiles function.
  2. On the OSGB group of the 3D Analysis tab, click the Generate DOMDSM button to bring up the Generate DOMDSM "dialog.
  3. Set the scope in the Select Range "in the dialog box, including Layer Bounds and Custom Bounds. The specific operations are as follows:
    • Layer Bounds: Click to select the Layer Bounds "radio box to set the union of the All Layers range in the current scene as the Result Data range;
    • Custom Bounds: Click and select the Custom Bounds "radio box to set the Result Data range by drawing faces. Click the drawing surface button, move the mouse to the current Scene, click the left mouse button and drag to draw a rectangle as the Result Data range, click the left mouse button after confirmation to complete the setting and return to the dialog box.
  4. The upper left and lower right at the Result Range "are used to display the range of Result Data.
  5. In the "Result Settings" of the dialog box, you can set the resolution, camera height, additional height, Result Datasource, Result Dataset and other parameters. The specific instructions are as follows:
    • Resolution: Set the resolution of the generated DOM and DSM Data. The default is 1, and the unit is meter/pixel.
    • Camera Height: Set the camera height for generating DOM and DSM Data, and the unit is meter. The lower the camera height is, the more detailed the buildings can be seen. The default value is 50 meters, which means that the generated DOM data is the surface conditions seen at the camera height of 50 meters. It is recommended that this parameter value not be less than maximum height of the objects in the scene.
    • Additional height: Set the additional height of Generate DSM Data. You can enter a positive or negative value as the additional height. The additional height value adjusts the data elevation as a whole.
    • Datasource: Select the Datasource where the Result Dataset is stored. All the Datasources in the Current Workspace are listed in the drop-down menu. The default is the same as the Source Datasource.
    • Dataset: Displays and sets the name of the resulting DSM Dataset. The default Dataset Name is DatasetDSM.
    • DOM File: Used to set the Save path and name of the result TIFF Dataset. You can directly enter the save path and name of the *.tiff file in the text box, or click the Open button on the right to set the save path and name of the Result Data in the pop-up Save dialog box.
  6. After setting the above parameters, click the OK button to execute the operation of generating DOM and DSM Data.
Hint:
    Result Dataset obtained by
  • Generate DSM Data is Raster Dataset.
    • The default coordinate system of DSM Data generated
  • based on Spherical Scene is GCS _ WGS 1984 (EPSG Code: 4326), which can be customized and modified.