Set Raster/Image Layer Properties

Instructions

The Raster/Image group in the Layer Properties panel organizes the property settings related to raster and image layers, used to adjust the display effect of raster/image data. Only when the current layer selected in the Layer Manager is an image or raster layer, can the relevant parameters be set.

Entry

  • Scene tab ->Properties group ->Layer Properties button ->Layer Properties panel ->Raster/Image section
  • Layer Manager ->Image/Raster Layer right-click menu ->Layer Properties button ->Layer Properties panel ->Raster/Image section

Steps

  1. In the Layer Manager, select a raster/image layer as the current layer.
  2. Click the Layer Properties button in the Properties group of the Scene tab, or right-click the current layer and select the Layer Properties button from the context menu. The Layer Properties settings panel will appear. In the Raster/Image section, set relevant parameters as needed.
  3. Only when the selected layer is an image dataset can the no-data settings be configured:
    • NoData (R,G,B): NoData refers to pixel values without actual meaning in the image. You can directly enter RGB values in the text box to set the specified color as NoData.
    • NoData Transparent: Used to set whether NoData is displayed transparently. When checked, NoData areas will be transparent.
    • NoData Color: When "NoData Transparent" is not checked, this option can be checked to specify the display color of NoData. Click the drop-down button on the right to select a color from the color panel, and NoData pixels will be displayed in that color.
  4. Transparent color setting: Set a certain color of the raster/image layer in the scene as a transparent color, so that the area covered by that color becomes transparent. This effect requires the use of both "Transparent Color" and "Transparent Color Tolerance" parameters.

    • Transparent Color: Specifies the color in the layer to become transparent. After checking the Transparent Color checkbox, click the drop-down button on the right and select a color from the color panel as the color to be made transparent in the layer.

    • Transparent Color Tolerance: Sets the color range (0–255) close to the transparent color. For example, if the transparent color's RGB value is (53, 99, 20) and the tolerance is set to 3, all pixels with RGB values between (50, 96, 17) and (56, 102, 23) will become transparent.
  5. Layer Transparency: Adjust the layer transparency by directly entering a value or clicking the up/down arrows. The transparency value is an integer from 0 to 100, with a default of 0 (fully opaque). The larger the value, the more transparent the layer; at 100, it is fully transparent.
  6. Multi-Resolution Rendering: Check the Multi-Resolution Rendering checkbox as needed. This function only works for map tile or image tile layers and is checked by default.
    • When checked, the system uses multi-resolution rendering to ensure smooth display of the layer; when unchecked, the system uses only one resolution to render layers in the scene, which may cause blank areas at tile seams during browsing.
  7. Color table settings: When a raster dataset layer is selected, clicking the Setting button will open the color table dialog, where you can adjust the stratified color display effect of the raster data. See the Color Table Settings Dialog document for color table settings operations.
  8. The "Auto Apply" checkbox is checked by default: After settings are made, the current layer will display the effect in real time. If not checked, click the "Apply" button for the settings to take effect.
   
Notes:
  • The layer transparency setting button is only available when the selected layer is an image layer or a raster layer loaded as an image.
  • The multi-resolution rendering checkbox can only be checked when the selected layer is map tile or image tile data.
  • The setting button is only available when the selected layer is a raster dataset.