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Questions tagged [transparency]

The ability to make a GIS layer transparent. That is, the ability to adjust the opacity or transparency of a layer to allow information below the layer to be visible.

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6
votes
2answers
12k views

Convert specific RGB (GeoTIFF) color to transparent

I have an RGB GeoTIFF file and I want to convert a specific RGB colour to transparent. I would like to use GDAL for doing this, but external Python scripts are also an option (though I haven't learned ...
6
votes
1answer
3k views

Saving Map Canvas as PNG with transparent background programmatically with QGIS?

I wrote a script to create a big number of heat maps for a given scenario. I would like to save the result of every heat map as an PNG image. I have figured it out doing it with simple Map Rendering ...
4
votes
1answer
3k views

Exporting Graphic with transparency in layout to PDF using ArcGIS for Desktop?

I'm using ArcGIS 10.1 for Desktop. I am trying to export a pretty simple map to PDF and finding the results are not what I expect. I have inserted two graphics on top in Layout. One is just a ...
8
votes
4answers
9k views

How to set the transparency for multiple layers or add a global transparancy preference?

How can I set the transparency to 27 % for all 245 layers in QGIS? The only way I know of is by right clicking on the layer name, selecting Properties, then Transparency and then moving the ...
6
votes
2answers
9k views

Exporting mxd to image with transparent background from ArcGIS for Desktop?

I cannot get ArcMap 10.0 or 10.1 to "Export Map" to a png or gif with a transparent background -- no matter what I set the background and transparent colors to. Thus, I created the following script, ...
4
votes
3answers
3k views

Transparency for PDFs in Arc

Trying to generate a vector-based PDF map, which includes transparencies, for quality purposes. However, I'm finding that transparencies get rasterized instead and is lower quality. Is there any ...
13
votes
2answers
1k views

Showing transparency slider by default in Layers Panel of QGIS?

Is it possible to have a transparency slider shown by default in the Layer window, i.e. directly after adding a new layer, instead of having it to enable for each layer manually via layer-properties?
11
votes
3answers
11k views

Displaying transparent overlapping polygons in ArcGIS for Desktop?

I'm trying to draw home range maps in ArcGIS 10.1 and am having difficulty displaying them as I would like. The home ranges are in the form of polygons and many of them overlap. I'm trying to get a ...
6
votes
6answers
11k views

ArcObjects - Create and Draw a Transparent Polygon

I'm trying to create a transparent Polygon in ArcMap; however, it's never transparent. Here's the code I have. // Create polygon IPolygon polygon = new PolygonClass(); // create & add points,......
7
votes
1answer
3k views

QGIS Raster Layer - Black rectangle appears as background

I have looked at solutions to what seem to be somewhat similar problems but they don't seem to solve my problem. A georeferenced raster layer loads into the correct location in relation to other ...
4
votes
1answer
915 views

How to set opacity with gdal_rasterize

I am using gdal_rasterize to create a raster of a huge file containing polygons. I managed to generate the raster file with the right color and with the minimum size to tile it after with the ...
8
votes
4answers
13k views

How to make transparent the background of a topographic map in QGis 1.8.0?

I'm starting to use QGis 1.8.0. I have a raster topographic map, i.e. white background and black contour lines, houses, roads and so on. I want to make transparent the white background, so if I ...
5
votes
2answers
6k views

Exporting GIS Images with Transparency

I'm trying to export some images of Gulf of Mexico infrastructure that will later be used for non-GIS purposes as overlays onto sea current/weather maps (likely in photoshop). I have no clue how to ...
6
votes
1answer
4k views

Make WMS layer background transparent in Leaflet

I have inserted the following layer from a GeoServer WMS in the following Leaflet map : var nexrad = new L.TileLayer.WMS("URL", { layers: 'Wrecks:WrecksGreaterNorthSea', format: 'image/png', ...
11
votes
2answers
732 views

How to set transparency to multiple raster values with Python

With the following code I can set 100% transparency to raster value 0: map=None for lyr in QgsMapLayerRegistry.instance().mapLayers().values(): if lyr.name() == "some_layer": map= lyr tr=None ...
4
votes
2answers
1k views

How to surround a clipped raster with transparency? (gdalwarp)

I am trying to perform the following task, but it does not seem to work: I have got a raster file (raster.tif) containing an aerial photo, which I want to clip using a shapefile (clip.shp) that ...
4
votes
1answer
982 views

How to add alpha chanel to mbtiles in gdal_translate?

I have lots of 16bit 3-band .tif from one sattelite. In batch processing i've made them 8-bit 4-band (RGBA) with LZW compression (.tif). Now i'm trying using gdal_translate (gdal 2.1 from QGIS 2.16) ...
6
votes
2answers
1k views

How to alter transparency by spatial location

I'm trying to create a map that has a all layers within a subject area having 0% transparency (full opaque), while features outside that area (defined by a polygon shapefile) having a reduced ...
4
votes
1answer
933 views

How to make a transparent background image using r.out.png?

Can the white background of the r.out.png of GRASS be changed to transparent?
3
votes
2answers
11k views

how to create translucent objects in KML?

I've been able to create a KML file that shows a circle on my (Google Earth) map. Now I would like to have a translucent fill on the circle. I'm new to KML, so I'm learning by trial-and-error with ...
3
votes
3answers
608 views

Making empty parts of aerial imagery transparent in QGIS?

I have a raster file (ECW format) that covers a very large area, however the contents comprise a thin strip of aerial imagery (100m strip centered over the rail line). The bounding box for the image ...
2
votes
1answer
2k views

MapServer - Show Polygon Layer with non-transparent border and transparent background

In MapServer, I want to show a polygon WMS layer (watersheds). I want to show the boundaries (outlines) of the polygons as a non-transparent thick line. And I want to show the inside (fill) of the ...
2
votes
1answer
301 views

QGIS: Is it possible to merge two stacked raster layers keeping color rendering and transparency?

Extremely new to QGIS and was hoping to merge 2 layers and maintain an "overlay" keeping layer transparency and color rendering? I seem to loose the top layers layer properties when merging and it ...
1
vote
1answer
409 views

Setting multiple colors transparent in raster map in ArcMap?

I have an aerial scene in jpeg2000 Format in which I would like the black and white areas to be transparent: In QGIS I can set transparent pixels in the layer properties by simply adding colors ...
1
vote
1answer
2k views

Overlapping transparent polygons won't darken

A client of ours wanted a map showing the 5-mile and 10-mile radius around business locations today and specifically requested that the overlapping transparent buffer radii grow darker with each other ...
1
vote
3answers
747 views

GDAL merge warp has black block can't remove

I have been using the gdal to merger a lot of *.tif files to get one big arear, I always get the blackblocks I tried GDAL merge and GDAL warp but none of them seems working. Does anyone know where ...
1
vote
1answer
413 views

Removing black region in published ECW file in GeoServer?

I had published an ECW file in geoserver 2.11.2 with SLD generated from QGIS. After publishing the layer i could see some black region in layers preview with the SLD generated from QGIS as below. This ...