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The QGis mapcolor files page already has some palettes you can copy, save as .qml, and use.. Save your first color style .qml file Done — section updated (2012/01). Copy-paste the following color code in an empty, plain text document (using something like Notepad or TextEdit), then save it in ./QGis/Mapcolors/ as Wikicarto_2.0.qml (the palette's name + .qml).
Merge layers is based on their nature : vector or raster. This later ease later application of color style, layer management, and files/project sharing. For raster such as topographic data (SRTM, ETOPO, etc.), shaded relief, natural earth skin, ... use : QGis (1.6) > Raster > Merge > (merge window pop up)
Using the toolbar: Simply click the icon corresponding to the layer type you want to add. You can also remove a layer by selecting it in the Layers window, right clicking on it, and clicking on Remove. Since the ETOPO1 data is a raster file, go ahead and add it to your project using whichever Add Raster Layer method you prefer.
Hypsometric tints (also called layer tinting, elevation tinting, elevation coloring, or hysometric coloring) are colors placed between contour lines to indicate elevation. These tints are shown as bands of color in a graduated scheme or as a color scheme applied to contour lines themselves; either method is considered a type of Isarithmic map .
For maps of future elections, "hold" is used for "incumbent intent is known and is eligible, or incumbent is running for re-election", whereas "gain" is used for "incumbent is retiring/term-limited". Following this, there is an additional color used, which is also used when an election has taken place but not been called yet.
The layer s QGIS work like layers of Inkscape; Highly recommended reading articles Tagged Image File Format and Shapefile; Georeferenced file (either vector or raster) ≠ non-georeferenced file (either vector or raster); Graphics software (Inkscape) ≠ mapping software (QGIS can "read" the georeferencing of a file);
[3] The user provides a tolerance distance, and as the lines of the input layers are being combined topologically, any lines that are roughly parallel, consistently closer together than the fuzzy tolerance, are combined into a single line. The choice of a proper fuzzy tolerance depends on the situation, especially the scale of the data, and can ...
A five-color map: note that this map is also four-colorable. The five color theorem is a result from graph theory that given a plane separated into regions, such as a political map of the countries of the world, the regions may be colored using no more than five colors in such a way that no two adjacent regions receive the same color.