The Layer Properties dialog box contains a wide range of settings to control the visual appearance of a map layer.
This dialog box is organized into two panels:
The content of panels depends on a type of layer and is lightly different for:
This fragment covers operations that are common to all kind of layers, regardless of being a vector, pixel or grid layer.
The most important concept here is a section. The section always contains information about the minimum and maximum scale of visibility. If the map scale is outside such a defined scope, then the section will not be visible. This option provides an opportunity to set different rendering and visibility based on the actual map scale.
By using a toolbar over the left panel, a user can add, delete, delete all, and change the order of the section. Deleting all will leave one section with default parameters.
By using a toolbar below the left panel, a user can save and load all layer properties from/into
.ttkstyle file. Thanks to that feature a user can create a library of reusable styles.
The General node covers general information about the layer like path, name, coordinate system, etc.
|Path|| Path or URL to the layer.
|Name|| Unique layer names.
|Coordinate System||Current coordinate system for the layer, changeable with Coordinate System|
|Basemap||If checked turns layer(s) at the bottom of the project to basemaps. This means that such layer(s) will be drawn continually upon dragging a map.|
|Cached paint||If un-checked turns-of caching layers(s) at the top of the map. Such a layer will be then repainted upon each map repaint (even if the visible extent remains intact. Generally, it is an option for handling trackable layers like live GPS positions etc.|
|Transparency||Factor defining the proportions in which the color of the foreground layer is mixed with the color of the background layer, Useful for creating anaglyph.|
|Info|| Information about the layer, File format, resolution, etc.
|User comments||User-provided information about the layer.|
The Sections node summarizes information about sections visibility (active scale, additional query-based visibility for a vector layer).
The Section node contains subnodes for specific layer properties.
|Visible||Defines if parameters in the panel constitute visibility or invisibility of the section.|
|Minimum scale||Minimum scale of section activity. If empty then the parameter is ignored.|
|Maximum scale||Maximum scale of section activity. If empty then the parameter is ignored.|