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Can a raster TIF be rendered transparent with QGIS?
Using QGIS 0.7.4 under Ubuntu Dapper, one cannot load two adjacent raster RGBA geotiffs with transparent collars and have the collars rendered transparently with QGIS. http://www.w5pny.com/download/Bland_t.tif
What are the properties of the QGIS renderer?
Style Properties¶ Band rendering¶ QGIS offers four different Render types. The renderer chosen is dependent on the data type. Multiband color – if the file comes as a multiband with several bands (e.g., used with a satellite image with several bands)
Can a grayscale image disappear in QGIS?
With this setting, the gray character of the image can disappear. With the scaling option Min/max, QGIS creates a color table with all of the data included in the original image (e.g., QGIS creates a color table with 256 values, given the fact that you have 8 bit bands).
How to get data range from image in QGIS?
First of all, you have to get the data range from your image. This can be done by choosing the Extentand pressing [Load]. QGIS can Estimate (faster)the Minand Maxvalues of the bands or use the Actual (slower)Accuracy. Now you can scale the colors with the help of the Load min/max valuessection. A lot of images have a few very low and high data.
How do you make a band Transparent on a raster?
In the transparency tab use the mouse selection tool to add a value from the screen by interactively clicking on a pixel. This will automatically add a new line in the table to the left showing the band characteristics of this pixel. Clicking on apply will then set to transparent all the pixels in the raster with the same pixel value.
How to render raster TIFS with transparent alpha channel?
QGIS renders raster tifs with transparent alpha channel as opaque. w5pny@… Using QGIS 0.7.4 under Ubuntu Dapper, one cannot load two adjacent raster RGBA geotiffs with transparent collars and have the collars rendered transparently with QGIS.
How to make the white background of an RGB raster?
This will automatically add a new line in the table to the left showing the band characteristics of this pixel. Clicking on apply will then set to transparent all the pixels in the raster with the same pixel value. See the ‘Transparent pixel list’ under the Transparency Tab.