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New Image

An image of a grid is a visualization of a geophysical theme, it uses a color scale to show the values of the grid.

An image node appears as a subordinate to a grid node in the Workspace Manager.

To create a new image first select a model selection or a grid node in the Workspace Manager and then select Image from the Visualization ribbon. This opens the new image dialog.

It is possible to create several images with different color scales for the same grid.

The Image Settings window for Image consists of two tabsheets. One with the grid selection and one with image settings.

The options for each tab are listed below:

Grid(s)

The grids to be included in the batch job are selected here. If Image was started from a grid, it will be preselected.

Use shift+click to select a range of grids or ctrl+click to select multiple individual grids. It is also possible to Filter on grid name or Select All grids.

Image

The image tab holds the path and a preview to the currently selected color scale. The user can:

  • Press the Open button to browse for a color scale. This opens the Color Scale Selector (ColorScaleSelector).
     
  • Press the Edit button to edit a color scale. This opens the Color Scale Wizard (ColorScaleWizard) where existing color scales can be customized or entirely new color scales can be made.

    Note that the histogram with data and the image preview in the Color Scale Wizard is based on the first selected grid. This is the case also if more than one grid was selected. 
     
  • Press the Save button to save the selected color scale to a file. By default this will be the Aarhus Workbench color scale format (*.awc), but it is also possible to save the color information to a few other standard formats like

    Geosoft TBL (*.tbl)
    ER Mapper LUT (*.lut)
    ArcGIS CLR (*.clr)

Below the standard color scale options there are a number of image creation related options:

  • When Interpolate pixels is checked, the user can interpolate the pixels of of the grid to create a smoother image than the grid spacing specified during gridding. When checked the Grid subdivision factor dropdown becomes active. Based on the used subdivision factor, the resolution of each pixel and the width and height of the image is calculated below. Odd subdivision factors will match the existing pixel border, even subdivision factors will have half a pixel on either side of the existing pixel borders.
     
  • When White as transparent color is checked (it is enabled by default) white it set as transparent in the grid.
     
  • The Translucency drop down makes it possible to created image with a degree of translucency. Higher values equals higher translucency.

When the OK button is pressed, Workbench prompts for a name of the new image. When the name has been specified, the node appears in the Workspace Explorer below the grid node it was made from. The image is also automatically created as a layer and appears in the Layer Control for the relevant map.