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Drawing Settings

Use this dialog to set application layer settings that apply to individual drawings.

Where do I find the dialog?

On the toolbar in terrain model drawing, select the Drawing Settings... icon

See also

Settings related to the Gemini Terrain project can be found in the dialog Gemini Terrain Settings - Project.

Terrain Model Area

You can set the terrain model area independently of the standard terrain model area defined for the Gemini Terrain project. This is useful when the map area is large and you only need to work within a small part of it. You can then set high grid density without significantly affecting program performance.

Changing the Terrain Model Area

You define the area extent dynamically in the map.

Procedure

  1. Use the zoom functions so you can see the desired terrain model area
  2. Click Locate... and point to the upper left corner
  3. Left-click to register the point
  4. Move the mouse pointer to the lower right corner (do not hold down the left mouse button)
  5. Left-click to register the point
  6. Click OK in the dialog to activate the new terrain model area

Clip Objects Outside Area

When you select a terrain model area smaller than the extent of your data foundation, you may want to activate Clip objects outside area in 2D. This is only visual clipping on the screen - the data is not deleted. You can activate this clipping independently for 2D and 3D views. By default, clipping is deactivated in 2D and activated in 3D.

You can also activate/deactivate display of the terrain model area frame. In 3D, you can also activate/deactivate a box that shows the elevation range in the data foundation.

Clipping Limitations

When you use clipping, exact arcs in lines and polygons are split into small line segments. This means you cannot:

  • Create helper lines
  • Expand circles
  • Create circle parallels

This also applies to 3D lines regardless of whether clipping is activated or not, since there is no mathematical arc between two points with different elevations.

In 3D, the program will always split up lines and arcs since it is more important that they can be fitted to the terrain model. It is also important to be able to cut through 3D polygons to create exact sections through objects.

Height Scaling

In large or flat Gemini Terrain projects, it can be useful to exaggerate the height scale to emphasize desired elevation effects.

Visualization Only

Height scaling does not affect tasks such as mass calculation and profiling. Height scaling applies only to visualization.

Symbol Scale (Model Scale)

The scale on a map shows the relationship between distance on a physical printed map and real distance in the terrain. When the scale for a map is 1:1000, it means that all distances on the map are 1000 times longer in reality. 1 cm on the map corresponds to 1000 cm (10 m) in reality. The standard scale is set to 1:1000 since technical maps are usually drawn at this scale.

Model scale is used to adjust text heights and openings in dashed strokes so they fit for plotting at the specified scale. This is especially important for plan drawings with road and water/sewer design. Text heights specified in various setup dialogs should be specified in mm on the plot.

Texts Affected by Model Scale

  • Water/sewer plan annotations
  • Text annotations
  • Texts in application layers
  • Volume contour annotations

Model scale affects, for example, openings in dashed lines for water/sewer pipes. These are adapted so that openings should be 2 mm and stroke lengths 5 mm. When you set model scale 1:500 and insert a map excerpt at scale 1:500 into a presentation drawing, texts get the size you specify in mm. The standard model scale is 1:1000.

Model Scale in Map Excerpts

You can also activate/deactivate the use of model scale in map excerpts, but changes in model scale in drawing settings have immediate effect in the model you are working in.

Grid Density (m)

With this setting, you set the grid density for visualization in 3D view. The unit is meters. This value is normally not used for calculations. The density for calculations is set in the dialog Gemini Terrain Settings... - Project - General. You normally do not want the same density for 3D visualization as for calculations.

Detail Level in Raster

This value controls how many pixels are drawn within the terrain model area when using all types of raster images in application layers.

Predefined Values

The program has four suggested values:

  • Low: 512 px
  • Medium: 1024 px
  • High: 2048 px
  • Extreme: 4096 px

The program uses this setting for WMS in plan view when you have activated Use terrain model area instead of screen area in the properties dialog for application layers, as well as for draping BGR/WMS in 3D.

Normally it is recommended to use the predefined values, but you can override the number yourself. The predefined values correspond to common resolutions on tiles delivered from WMS servers. Advantages of lower detail levels:

  • Text on background maps may become easier to read
  • Shorter download time for images

Recommended Maximum Value

The maximum value is not locked, but do not use a value higher than 4096. Reasons for this recommendation:

  • Program memory usage can become unnecessarily high
  • Several of the Norwegian Mapping Authority's WMS services do not support pixel values higher than this

Perform Interventions

With this setting, roads and building excavations will make interventions in the terrain surface. The grid will also be adjusted to the intervention. You can activate display of this adjusted grid in the Layers dialog.

High Detail Level

This setting activates detailed display of map symbols. Low detail level is simpler and cuts out figures, hatching, dashed lines, etc. High detail level results in reduced performance - it takes longer to update the screen.

Curve Smoothing

This setting performs smoothing of line and polygon objects that are assigned a smoothing method. You set the smoothing method in the presentation setup for the application layer.

This setting controls whether hyperlink icons should be displayed in the drawings.

Alternative Render Texture

This setting is used in extended rendering to get better visualization of trees.

Show Map Grid / Show Map Sheets

These functions are active when a coordinate system is selected under Gemini Terrain Settings... - Project - General.

Regenerate Layers

This function recalculates the grid. This is relevant when you have removed an intervention from the model (road body or building excavation) and need to recalculate it.