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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4
votes
1answer
180 views

Both-sided transparency in ArcScene for extruded features

I'd like to extrude my polylines and make them transparent, but from both sides. As you can see below, the transparency works only on one side. I think it's something with the side-orientation. I can ...
1
vote
1answer
39 views

QGIS 2.14.3: I'm having problems when exporting my map to jpg

I am using QGIS 2.14.3 and I'm having problems when exporting my project to jpg (also when trying to export to pdf...). I have several shapefiles opened, they are basically polygons on a shapefile ...
0
votes
1answer
58 views

creating a new layer based on colour characteristics

I have 14 polygon layers. I have plotted them as transparent layers, so I can get a final layer with 6 different colours, which represent different categories. I want to create a new layer made by the ...
2
votes
0answers
43 views

Using the alpha channel of a GeoTIFF in Geoserver

I want to publish a map as a WMS using GeoServer. The map consists of several layers each of which is a GeoTIFF containing RGB channels and an alpha channel. The images were edited in Photoshop and ...
2
votes
0answers
56 views

Set Default Transparent Pixels in QGIS?

Is there a way to set QGIS to automatically load in images with no data values of (0,0,0) as transparent instead of black? I've looked through the forums, tried saving a .qml file out, looked through ...
2
votes
0answers
331 views

How to render a transparent raster layer on top of one or more vector layers with PyQgis?

I been trying to render a map with a 3 vector layers and one raster layer. The idea is that the raster layer should be on top of the other 3 vector layers. The problem is that even when I add the ...
2
votes
0answers
1k views

Overlaying a mbtiles tile layer produced with tilemill over another layer maintaining transperency

So using leaflet, I'm overlaying my base tile layer as google satellite imagery. I want to overlay another layer (Mbtiles layer) produced with tilemill over this satellite layer. I was successful in ...
1
vote
0answers
25 views

Atlas transparency in Pyqgis

I use atlas with PyQGIS. In my atlas i use a feature (atlas feature) with invert polygon, this feature have the transparency = 50%. When i generate atlas with composer no problem, but if I use the ...
1
vote
0answers
19 views

How to unckeck automatically the “No Data Value” predefined on raster background on QGIS 2.14?

I'm trying to import a bunch of rasters, but there is a parameter predefined on the TIFFs, where says that No Data Value should be marked. But I need this unchecked. I opened the metadata, and found ...
1
vote
0answers
96 views

OpenLayers add white background to image/png geoserver layer

i created a new wms layer in openlayers. i get the layer from geoserver as image/png and transparent=true. openlayers rotate the raster 30 deg (due to its coordinates - it's fine!) but add white ...
1
vote
0answers
60 views

ArcGIS layer transparency Issues

I'm using ArcGIS 10, working on the district boundaries of a country. I need to show certain cycles of a distribution and some of the districts are (partly/completely) covered in each cycle. Is there ...
1
vote
0answers
340 views

Using WMS layer transparency with Geoserver, Openlayers and Drupal?

I am using OpenLayers in Drupal to display Geoserver WMS data. I can get the layer to overly properly, however the raster layer (png) has a white background I cannot remove. I have created a style in ...
1
vote
0answers
165 views

Transparency on black/white raster after clipping in QGIS?

I'm new to this forum and QGIS. I'ld really appreciate it if you could help me with my problem, since I couldn't find any solution online but people experiencing the same issue. It seems as if this ...
1
vote
0answers
129 views

Gdal_translate and transparent rasters in PDF

I am trying to make an application that creates geospatial pdf's from my website, but I am encountering problems with Gdal_translate and transparency of rasters. The setup that I am working up ...
1
vote
0answers
136 views

How to prevent transparent borders (collars) of a tif wipe out overlapping regions of adjecent tif while using gdalbuildvrt

I have a set of Geotifs that have got transparent borders (collars) of irregular shapes & dimensions around them. First I created a VRT over this set of Geotifs through gdalbuildvrt. Then I ...
1
vote
0answers
75 views

QGIS 2.01 - raster transparency not working properly

I have loaded a color raster image (aerial orthoimagery) into a QGIS project. The layer is visible but very transparent (in the enclosed image the vector polygons are below the imagery), but when I ...
1
vote
0answers
127 views

How to reduce transparency for Openlayers using Map Composer?

Increasing transparency of Openlayers will increase the contrast of others layers. For sure, it will increase the esthetical aspect of maps.
0
votes
0answers
26 views

QgsMapCanvas with semi-transparent layer causes graphic artefacts

I'm trying to set a background image (in my case a google map shot) for QgsMapCanvas with semi-transparent layers upon it. Therefore, I set alpha of background color for canvas to zero and create a ...
0
votes
0answers
24 views

gdal2tiles transparency error

I'm trying to get transparent pngs by running gdal2tiles.py -p mercator -r average -s EPSG:4326 -z 0-7 -a 0,0,0 -w google iev3.tiff tiles-new I get Warning 1: ...
0
votes
0answers
15 views

Making overlapping raster catalog entries

So I'm working in ArcGIS Desktop 10.1. I have a raster catalog in a gdb that has a few hundred entries with many of them overlapping such that entries that are stacked below another cannot be seen ...
0
votes
0answers
64 views

merge tif file with No data

I have to 2 tiff files, both of file have No data values as in Image 1, when I use gdal_merge to mosaic both images to one image, the No data area turns to black, which I don't want, How to maintain ...
0
votes
0answers
33 views

Transparent layers won't display correctly, but print OK in ArcMap?

Transparent layers are not displaying correctly in ArcMap 10.2 or in exported maps, but they do print OK. They look like this: The weird thing is - the transparent layers displayed fine a few ...
0
votes
0answers
72 views

CartoCSS: raster custom transparency color value?

In QGIS (and probably other GIS tools) you can style a raster layer such that certain pixel color value(s) will be rendered as transparent. In QGIS 2.6, this can be set in Layer Properties -> ...
0
votes
0answers
30 views

What is the cheapest way to make all objects from GraphicsContainer transparent?

I am changing arcobjects 10.1 project with a lot of legacy code. I need to make all objects transparent on the map. This objects (points, different sectors, polygons, etc) are persisted in ...
0
votes
0answers
114 views

How to avoid random transparent pixels in georeferenced grayscale raster images?

I'm in the process of georeferencing some old black and white aerial pictures from 1990 in QGIS 2.4. So far, this is business as usual, no problems. Of course I get the usual black triangles, because ...
0
votes
0answers
88 views

QGIS: “No data” raster value for missing rows conflicts with data?

I’m having a problem with specifying “no data” in a raster dataset in QGIS 1.8.0-Lisboa. QGIS does fine in interpreting pixels I don’t have rows for as “no data” if I set Layer Properties -> ...