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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3
votes
1answer
2k 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 ...
10
votes
2answers
6k 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
10k 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,......
5
votes
3answers
2k 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
3answers
7k 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 ...
4
votes
3answers
2k 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 ...
3
votes
2answers
2k 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 ...
2
votes
2answers
7k views

GDAL: 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 ...
2
votes
1answer
664 views

How to save the Map Canvas as PNG with transparent background programmatically?

I wrote a script to create a big number of heatmaps for a given scenario. I would like to save the result of every heatmap as a png image. I have figuered it out doing it with simple Map Rendering but ...
6
votes
2answers
741 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
2answers
270 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
1answer
627 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?
1
vote
1answer
936 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 ...