14

This is possible in QGIS using the print composer. You'll need to both: Remove the background color from the map item. This is done by unchecking the "background" option in the map item's properties. (The default is a white background) Set the page itself to a transparent style. This is done through the composition properties tab.


13

As an alternative option, you can open Legend tab and select Opacity slider widget. It will add an opacity slider in the Layers panel.


12

You have to click on the layer rendering arrow (see the bottom of your second image) to access the slider and other option. in QGIS 2 it was on by default, in QGIS 3 it's off by default...


11

here's a better answer, use gdalbuildvrt with either srcnodata or vrtnodata flag: gdalbuildvrt -srcnodata "123 231 67" outfile.vrt input.tif If the next application in line doesn't understand .vrt, translate to a new tif: gdal_translate outfile.vrt final.tif


11

Any transparency layer gets lumped in with the images pdf layer. ESRI Help From the advanced pdf features section: Layers that cause rasterization, such as transparent layers, or layers that use a picture fill symbology consolidate all the layers below them into a single layer with the name Image .


11

The easiest way is to edit the aplha for the fill


11

This was briefly mentioned in QGIS - Developer forum where you need to use QgsMapLayer::setCustomPropertylayer to enable the embedded widget for your layer. We can then add an itemAdded event so that whenever a layer is added, it will automatically be shown with the transparency widget. So you could use something like the following in the Python Console: ...


10

I found this other thread which was helpful How do I set layer transparency in QGIS 2.0 with Python? It seems like there should be a shorter and more efficient way, but I tested this and it works: print 'Start' active_layer = qgis.utils.iface.mapCanvas().currentLayer() raster_transparency = active_layer.renderer().rasterTransparency() ltr = ...


10

Make sure to set the format option of the L.TileLayer.WMS to image/png, as explained in the documentation. The default is to use .jpg for map image tiles, which is a image format which doesn't handle transparency. Leaflet does not override the format option depending on the value of the transparent option. e.g.: var wmsLayer = L.tileLayer.wms('http://...


9

You can set the page background to transparent by creating a transparent symbol and setting the page background to use that symbol: transparent_fill = QgsFillSymbolV2.createSimple({ 'outline_style': 'no', 'style': 'no'}) c.setPageStyleSymbol( transparent_fill ) There's also a few other things wrong with your script: First, mapRenderer = iface.mapCanvas()...


8

A little python script like this would do it for layer in iface.legendInterface().layers(): layer.renderer().setOpacity(0.2) Just copy and paste that into the python console (which is shown via Plugins->Python console) and hit enter twice. The script will loop through all layers and set their opacity to 20%.


7

I just gave this a test using ArcGIS for Desktop 10.2 on Windows 7 SP1 and was able to create a PNG and GIF files that had a transparent background that I could verify by inserting them as pictures into Word 2010 as In Front Of Text. I followed the Exporting your map instructions from the ArcGIS 10.1 Online Help, using Rose Quartz as both Background and ...


7

Right-Click Layer Properties and select Transparency tab. You would have a default Row in the transparency pixel list. Delete that Row(Use Icon 3) If you just have to make the White part transparent, Create a new Row(Use Icon1). Enter 255,255,255 for Red,Green and white and Set 100 for percent transparent column. Click Apply and you are done. Some sample ...


7

You can make transparency vary for each category using a field value if you click the Advanced button in the Symbology tab (EDIT: available in 10.0). Now you have to see what's more convenient between adding and populating a field with the percentage, and duplicate the layer as @artwork proposes. The first option will surely save extra work if you need to ...


7

The following works in 10.2.1 and essentially turns the sketch hollow as suggested by Ian. As soon as you stop being in sketch mode it returns to your selected transparency. In the Editor toolbar go to Editor > Options and untick Use symbolized feature during editing.


7

ArcMap won't do that for a single layer - transparency is handled for the entire symbology as a unit, not in pieces. So, the solution is to just have two copies of the layer in your table of contents. One with the outline and no fill, the other with no outline and a colored fill with whatever transparency you are looking for. Just make sure the layer with ...


7

Your gdalinfo dump looks like the raster already has 4 bands and is interpreted as RGBA. This answer will assume you are starting from a 3-band RGB 8-bit/channel image. First create a single-band 8-bit image which has the desired alpha value (alpha 255 is fully opaque, 0 is fully transparent). You said you want about 20% transparency, so 80% opacity => ~200....


6

Similar to whuber suggestion (using geoprocessing tool) you can create this look by: Create temp polygon shp, and digitize a large feature over all features that you want to mask out. Use the Erase tool to erase the temp polygon from your AOI layer. The resulting layer, from the erase operation, you can load into ArcMap and give it a transparency. This ...


6

As @Brad already answered - not possible. Transparencies are rasterized in the PDF resulting in HUGE file sizes. Very very poor PDF engine in ArcGIS as you no doubt have realized. You can turn the transparencies off then export to PDF and open in Illustrator or CorelDRAW and apply transparencies in post processing. Time consuming but possible. Do not ...


6

You asked that ages ago but, maybe useful for some, as not answered yet... You said that you are keep your adnotation in the map but if you save them in a database You will have full control over the adnotation, including transparency is it something you have been looking for??


6

The approach you you mention does sounds unorthodox, it is, however, the only way you can do it in ArcGIS. It is actually more efficient doing this inside ArcMap as you suggest as oppose to a 3rd party image editing software outside of ArcMap. The benefit is that you don't have to post-process your cartography in a another application and it is therefore ...


6

As far as I know, there is no way to make text transparent in ArcMap. My suggestion for a workaround would be to export to PDF and then add the watermark using Adobe. That's what I do to add watermarks to my maps. The limitation of this would be that it requires Adobe Standard I believe. If you don't have Adobe Standard, here is a link with some other ...


6

Try using an annotation feature class for the 'DRAFT' text, manually editing the text, and setting the transparency for the layer at 50%. This allows you to see the features under the text, and it is not necessary to export the document for use in another program.


6

I would use the clip to shape option in the data frame properties. Have two copies of your basemap in the Data Frame one with no transparency which you clip to your town border using the option below. Then make your second one transparent and sitting below the first basemap and exclude it from the clip using the Exclude Layers button. Below is a very ...


6

Sorry for the short answer but I suppose that simply adding an alpha channel might do the trick. At least I could make an output that is semi-transparent in QGIS with the following command. gdal_rasterize -of gtiff -ot byte -co alpha=yes -burn 255 -burn 0 -burn 0 -burn 100 -ts 500 500 -l test test.shp test.tif


6

Try replacing 'color':'#ffffff' with 'color':'0,0,0,0' The last zero is the alpha chanel which controls the level of transparency. So setting it to 0 will set the fill colour with an opacity of 0%. Tested with the following code: from PyQt4 import QtGui layer = iface.addVectorLayer("path_to_vector_layer", "layer_name", "ogr") myVectorLayer = ...


6

There is a plugin called Raster Transparency, that as the name suggests, will open a dockable panel with sliders for changing the transparency of a selected raster layer. Go to Plugins > Manage and install plugins - Find it and install, a new associated icon will appear on your toolbars.


6

1. Method To remove the black border temporarily in QGIS, you can set the "Additional no data value" in Layer properties -> Transparency to 0 (or 000000). If the border is not 100% black you can use the information tool to find out which color you need to set to transparent. If the border is not evenly black, you can use the custom transparent pixel list in ...


6

In the QGIS main project area duplicate your layer. Set the style of one to be 0% transparency, and unclick the layer so it isn't visible. Set the other layer to be 60% transparency as you want it, and have that visible. Then in print composer, add your map and add the legend, you should see both layer legends with their respective styles. Turn off '...


5

Transparency is not a property of a polygon itself, rather it is a property of the layer containing the polygon (like symbology). Take your polygon data, and store it in an IFeatureLayer. From IFeatureLayer, get ILayerEffects, which is an interface of IFeatureLayer. Transparency (0% to 100%) is a property of ILayerEffects. Also, note this from ESRI ...


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