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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.

32 questions with no upvoted or accepted answers
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151 views

How to display a line with fading transparency in qgis?

I have a straight line with two vertices, which I'd like to style. I want the style to be a fading line from start to end, so the transparency is gradually increasing from start to the end of the line....
3
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0answers
555 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 ...
3
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0answers
2k 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 ...
2
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1answer
35 views

QGIS 3.4 set transparency only for some layers below

I‘m working on a geomorphological map of a river and its sourroundings. As a base I have a topographic map and a DEM for the pre-mapping. The topographic map is not accurate enough in the river gulley,...
2
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0answers
35 views

Setting transparent to color for raster layer using ArcMap?

I'm working on a map where I'm overlaying a topographic map on a hillshade map (from ALS data). With the right levels of transparency, those maps tend to be the best base for all kinds of stuff. ...
2
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0answers
107 views

How to use FeatureLayer's opacity settings?

I'm pretty new to GIS development and I'm trying to load a FeatureLayer that has opacity set (layer is outlined areas that are color-filled and translucent). However, when the layer is displayed in my ...
2
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0answers
296 views

Transparency not working right in GeoServer layer group

I have two image mosaic layers of geotiffs. One contains aerial photos, the other contains rasterized vector data, meant as an overlay. Creating a layer group of these two produces an unpleasant ...
2
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0answers
532 views

Remove black borders when converting GeoTiff to MBTile with gdal_translate

I am using gdal_translate to convert a fairly large geoTiff to MBTiles. As the geoTiff is reprojected, it is not square anymore in Google Mercator and the parts that are not covered appear black when ...
2
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0answers
579 views

Make “Nodata” transparent in raster - Mapfile/Mapserver

I have a raster and I'm trying to make it display in Openlayers2, using Mapserver 7.0 in backend. My problem is, I think, that because the online map is not the same projection as my data, Mapserver (...
2
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0answers
386 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
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0answers
124 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 ...
1
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0answers
25 views

Displaying rendered layers in 3D Maps in QGIS 3.8.x with variable transparency/opacity

I am looking at using QGIS to help facilitate conversations/do some thinking in 3D. I have tried both QGis2threejs and the native 3D Map available in QGIS 3.x and both have their strengths. The ...
1
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1answer
25 views

ArcScene transparency per feature

I am working with some data that needs to be visualized in different transparencies levels. I know how to do it in ArcMap: Symobology --> Advanced --> Transparency. Now I am working a 3D project and I ...
1
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0answers
25 views

CentOS 7, Mapnik, and Tilestache: Seems like image assets are ignored by Mapnik's point/pattern symbolizers

[Update 6.6.2019] Ok...new detail. I checked a different Apache error log and discovered that it's littered with these errors, generically corresponding to.. failed to allocate png_ptr Actual ...
1
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1answer
56 views

QGIS geo referencing - black background transparency

I georeferenced a raster file and ended up with a black background (exact 000000) The raster file contains a lot of black, so setting black to be a transparent color is not a good solution since I ...
1
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0answers
423 views

Google Earth transparent weather KML file overlay

I am unable to make any of the weather overlays from the website below transparent/opaque once they are loaded into Google Earth. I have attempted to modify the KML file directly by using the ...
1
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0answers
58 views

Problem with overlapping transparency

I am making an Android app that has bathymetric lake data on a google map. I am new to GIS work. I get this info from the state of nebraska as an already formatted kml file. In the file they simply ...
1
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0answers
79 views

Combine two raster maps with transparency

I have two maps in geotiff format for exactly the same area with exactly the same geoinformation. The first one is a real land map, the second one is a satellite picture with clouds (rgba where alpha ...
1
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0answers
52 views

Trying to deal with pure whites, and transparency of orthomosaic in MapInfo

I'm hoping to deal with this using the raster calculator in QGIS. But, here's my issue (and I'm a pretty novice GIS user); when you bring a raster image into MI, it turns all the null ("no data") ...
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0answers
119 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
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0answers
628 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 ...
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0answers
1k 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
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0answers
279 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 ...
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0answers
202 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
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0answers
227 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
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0answers
130 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
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0answers
176 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
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1answer
55 views

QGIS transparency as 4th input layer

I have a file that contains four rows. The first row indicates the longitude, the second row indicates the latitude, the third row indicates the colour of a specific longitude and latitude and the ...
0
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0answers
223 views

Transparent color settings in ArcMap?

I would like to know are there any (relatively) easy options to adjust color transparency (alpha value) in ArcMap (any version, any license)? I think that's easy to do in ArcGIS Pro because, as you ...
0
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0answers
137 views

Is a TIFF with a 1-byte/px band and RGBA(?) palette and a 1-byte/px Alpha band valid?

I have a process (see how to preserve color-interpretation when merging TIFFs and adding alpha band) which produces a TIFFs (download example image1 17.6 MB) with the following gdalinfo output: ...
0
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0answers
85 views

Setting transparency of feature class in ModelBuilder in ArcMap?

I've made a model which yields an output feature class using ModelBuilder in ArcMap 10.4 I can set the symbology for the output layer by specifying a layer file. Is there any way I can set the ...
0
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0answers
184 views

Adjust polygon fill transparency via ArcGIS cartographic representations?

This is my first experience with ArcGIS representations (10.3.1, advanced). I would like to adjust polygon fill transparency by editing the representation (via Layer Properties>Symbology>...