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Propriedades a partir do menu de contexto. Raster Layers Properties Dialog. Na parte inferior, pode-se ver uma miniatura da camada, a simbologia da legenda e o mapa de cores. QGIS offers four different Render types. The renderer chosen is dependent on the data type. Raster Renderer - Multiband color. This selection offers you a wide range of options to modify the appearance of your raster layer. First of all, you have to get the data range from your image.
This can be done by choosing the Extent and pressing [Load]. A lot of images have a few very low and high data. These outliers can be eliminated using the Cumulative count cut setting.
With this setting, the gray character of the image can disappear. Then, only the values within the standard deviation or combinacao de cores verde com azul multiple standard deviations are considered for the color table.
This is useful when you have one or two cells with abnormally high values in a raster grid that are having a negative impact on the rendering of the raster. All calculations can also be made for the Current extent. This is the standard render option for singleband files that already include a color table, where each pixel value is assigned to a certain color. In that case, the palette is rendered automatically. If you want to change colors assigned to certain values, just double-click on the color and the Select color dialog appears.
Also, in QGIS 2. The label appears in the legend of the raster layer then. Raster Renderer - Paletted. When adding GRASS rasters, the option Contrast enhancement will always be set automatically to stretch to min maxregardless of if this is set to another value in the QGIS general options. This renderer allows you to render a single band layer with a Color gradient: You can define a Min and a Max value by choosing the Extent first and then pressing [Load]. Raster Renderer - Singleband gray.
Outliers can be eliminated using the Cumulative count cut setting. While the first one creates a color table with all combinacao de cores verde com azul the data included in the original image, the second creates a color table that only considers values within the standard deviation or within multiple standard deviations.
This is a render option for single-band files, including a continous palette. You can also create individual color maps for the single bands here. Raster Renderer - Singleband pseudocolor. In the left block, the button Add values manually adds a value to the individual color table.
The button Remove selected row deletes a value from the individual color table, and the Sort colormap items button sorts the color table according to the pixel values in the value column. Double clicking on the value column lets you insert a specific value. Double clicking on the color column opens the dialog Change colorwhere you can select a color to apply on that value.
You can also click on the button Load color map from bandwhich tries to load the table from the band if it has any. And you can use the buttons Load color map from file or Export color map to file to load an existing color table or to save the defined color table for other combinacao de cores verde com azul. In the right block, Generate new color map allows you to create newly categorized color maps. You can invert the colors of the color map by clicking the Invert checkbox.
Further settings can be made in modifiying the Combinacao de cores verde com azulthe Saturation and the Contrast. Raster Rendering - Resampling. QGIS has the ability to display each raster layer at a different transparency level. Use the transparency slider to indicate to what extent the underlying layers if any should be visible though the current raster layer.
This is very useful if you like to overlay more than one raster layer e. Combinacao de cores verde com azul will make the look of the map more three dimensional. As an example, we want to set the water of our example raster file landcover. The following steps are neccessary:. Propriedades do menu pop-up. As you can combinacao de cores verde com azul, it is quite easy to set custom transparency, but it can be quite a lot of work. Therefore, you can use the button Export to file to save your transparency list combinacao de cores verde com azul a file.
The button Import from file loads your transparency settings and applies them to the current raster layer. Large resolution raster layers can slow navigation in QGIS. By creating lower resolution copies of the data pyramidsperformance can be considerably improved, as QGIS selects the most suitable resolution to use depending on the level of zoom.
The Histogram menu allows you to view the distribution of the bands or colors in your raster. The histogram is generated automatically when you open the Histogram menu.
All existing bands will be displayed together. You can save the histogram as an image with the button. You will need to select the option Show selected band. The following steps are neccessary: Carregar o arquivo raster: Click the Add values manually button.
A new row will appear in the pixel list.
