Questions tagged [color]
The property possessed by an object of producing different sensations on the eye as a result of the way it reflects or emits light
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9 views
QGIS: RGB image file to Y'CbCr and other Luma+Chroma Representations
is it possible using QGIS on windows to convert an RGB image file to Y'CbCr and other Luma+Chroma Representations format.
I've seen various formulas for this written in MATLAB and R. I am looking to ...
2
votes
1answer
43 views
Remove edge styles on polygons
I have multiple polygons aligned next to each other. They are colorfilled with "Graduated" style. I have changed "Stroke style" to "No Pen".
How can I get the hairline between the polygons to ...
3
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0answers
50 views
Extracting GeoTIFF colours and adding to equal geometry shapefile
I have the following map in .png-format that I would like to replicate, but I cannot obtain the original data.
The map shows the current water supply vulnerability for local municipalities in South ...
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0answers
27 views
QGIS different colour in the same polygon [closed]
I utilise QGIS 3.4 Madeira. Using an imported drawing from AutoCAD (converted in Shapefile). I would like the colour to be the same in all the polygon. Unfortunately some parts are darker than the ...
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0answers
20 views
Creating and importing .txt custom singleband pseudocolor scale into QGIS?
I have a .txt file with 3 colums :
One with the pixel value,
One with the corresponding color expressed like this : #960000 and
One with the name/legend corresponding to the color
Here is how the ...
3
votes
2answers
80 views
Giving the same color to different shapefiles in QGIS
I have two shapefile consist of many dots. First shapefile's dot values are between -19.060 and 9.680, second shapefile's dot values are between -13.153 and 11.758.
I want to apply the same color ...
3
votes
1answer
78 views
Fill color and outline color with the same value [duplicate]
I made a categorized symbology on a shapefile, but the color value of outline (stroke color) is different than the color of fill color option. How can I ensure that both colors are the same for fill ...
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2answers
36 views
Applying color ramp to gradient fill in ArcMap?
I know that you cannot apply color ramps to the outline of a polygon, so essentially what I want to do is add a gradient fill with the inner color of the polygon being "no color", and then apply a ...
1
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1answer
32 views
Applying one color to many layers in QGIS 3?
I've been playing around with my QGIS Bonn (3.2.3) and I have a question regarding styles/symbology/colours.
Is it possible in QGIS to set one colour/style to multiple layers at once?
3
votes
1answer
77 views
Multi-band raster color model in QGIS. Why RGB (668, 983, 1007) in Uint16 appears green?
I created an RGB Uint16 composite raster in QGIS .
These are band designations:
Band 1 - blue
Band 2 - green
Band 3 - red
When i query value of a pixel that appears green - it shows (B3: 668, B2: ...
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1answer
35 views
KML polygon rainbow filled colors is showing only as simple color?
I draw filled color contour in Surfer application
I imported this file to Google Earth as .kml file
There is no problem so far
I tried to import the same file to QGIS 2.18.28
But the colors is not ...
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vote
1answer
35 views
QGIS 3.4.3 Color region bounded by certain lines [closed]
How do I color in the certain regions that are bounded by lines?
I'm completely new to QGIS.
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1answer
42 views
How to Save as in 1 GeoTIFF file the hillshade raster and colored raster layer in QGIS 3.4.4?
I have a raster GeoTIFF of western Mediterranean sea and i want to apply the hillshade model with colors as the tutorial explains (Create great looking hillshaded maps in QGIS). After i finished my ...
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0answers
12 views
DEM colour themes add-in for QGIS [duplicate]
Is there any plugins / add-ins for QGIS that give more of a variety than the default colour ramps?
4
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2answers
140 views
QGIS - How to differently colorize labels from two separate fields using color expression script?
I have 2 fields, I concatenate them [concat(to_string(field1), ' ', to_string(field2))] to show their labels side-by-side.
Is it possible to colorize from "text color expression" (using some scripts) ...
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0answers
44 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 ...
1
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0answers
35 views
Color-blind preview export
There are many ways to preview a map as it is seen by people with color vision impairment. ColorOracle, preview mode in QGIS, etc.
But none of these options allow exporting the modified image, only ...
2
votes
1answer
93 views
Change color of polygon (country) in QGIS
I have a txt file added like a layer to QGIS 3.4.2. File number 1. It is an attribute table.
I have a shapefile (a map) added to QGIS 3.4.2. This shapefile has all the countries of the world.
Both ...
1
vote
1answer
45 views
QGIS raster color selection
I'm working with a raster map that looks like this:
Do you know any way to select the red/blue spots or ideally put a points on them? I've been browsing web and qgis help for a while now, but I haven'...
2
votes
3answers
470 views
Changing colour of imported SVG icon in QGIS 3.4
I have imported my customised icon (which was obtained through the .jpeg image conversion) for point layers using an SVG file.
This works well except for the fact that the original colour was ...
1
vote
0answers
64 views
How to export shapefile with colours from QGIS
I want to export shapefiles from QGIS. The shapefiles have been colored by category, but when i export them, the exported files does not have colors, but only the lines that divide the categories. I ...
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2answers
116 views
Can QGIS do color transformation from RGB to IHS (Intensity,Hue,Saturation)?
I need to transform RGB map to IHS is that feature available in QGIS?
3
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1answer
53 views
Filling or splitting polygons proportionally based on variables using QGIS?
I want to divide each country into three separately coloured areas, like this:
The proportions of the three coloured areas must based on three columns of attribute data in the country shapefile's ...
2
votes
3answers
155 views
Multiple overriding rules for styling in QGIS 3.4.0
I am a total beginner to QGIS and still struggling with the basics. After a quick research on this forum I could not find the answer to my current issue.
What I am trying to do is to colour the ...
2
votes
2answers
76 views
Custom color palettes not visible to other layers?
Full-disclosure: fairly new to QGIS (v3.4), and I am currently styling a map for presentation. I'm trying to match colors within data contained on a layer using "Categorized" styling, so that I can ...
2
votes
2answers
62 views
Heatmap-no data vs Zero
I am new to QGIS. I am working on creating heat map of bird diversity(data downloaded from ebird.org). The issue I face is that how to differentiate between:
There areas where data is not available (...
2
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0answers
33 views
Changing color according to attribute from another layer using PyQGIS?
I have township polygons on a first layer and landmark points on a second layer.
I would like change the color of each township polygons when landmarks points are missing.
I can already select one ...
0
votes
1answer
249 views
Changing color scale in KML files?
I want to work with kml/kmz files in the Google Maps API, but I want to remap the color scales.
Is that possible?
Here are example kml/kmz files where I'd like to change the color representation ...
5
votes
1answer
57 views
QGIS rendering TIFF color with wrong color
When I try to display a GeoTIFF image with single band pseudocolor, the style seems to be wrong for values out of the range 255.
The legend is shown as
The green pixels have a value larger than 255....
2
votes
1answer
60 views
Coloration of orthophoto different between QGIS and ArcGIS
I have an orthophoto created with Agisoft Photoscan that I would like to use for a map.
Why is there a difference in coloration between QGIS and ArcGIS?
For the record, the color showing in QGIS is ...
2
votes
1answer
370 views
Change Layers Panel background color in QGIS
In QGIS it's easy to change background color of the map canvas, but is there a way to do the same for the Layers Panel ? In cases of very light colored styles these appear not so clear (if at all) on ...
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1answer
108 views
Why does gdalinfo -hist give values outside of [0 - 65535]?
I am running gdalinfo -hist on a 3 band tif file and am getting the following output (see below). Notice it says 256 buckets from -78 to 40184. That's fine, but then when it shows the histogram, ...
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2answers
381 views
How to assign raster layer's colors to polygons in QGIS?
I have a georeferenced raster file showing parcels of a town with different colors (yellow for the category single-household residential, green for agricultural areas, etc.). I also have the shapes of ...
2
votes
2answers
222 views
Same colour palettes for two different maps in ggplot2
I am constructing two ion concentration maps in the UK using ggplot2. The dataset used for mapping are lzn.kriged1 and lzn.kriged2 which basically has the same structure:
> str(lzn.kriged1)
Formal ...
1
vote
1answer
49 views
Highlighting using distinct color where features overlap in QGIS?
I have two species on my map and right now they are different colors. However, what I want to happen is when they overlap in the same spot, the color is a distinct difference from the other two colors....
1
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1answer
205 views
How to display a bright and realistic GeoTIFF using GDAL?
I am using GDAL (gdal_merge) to put together some landsat photos using the proper bands. When I open the GeoTIFF that is created using gdal_merge (in Windows), the GeoTIFF is super dark. Now, when I ...
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0answers
67 views
QGIS raster image leaving original colors intact
I'm using a program that generates a map using a set of colors (radio signal strength ranges, to be specific). It outputs the file as a jpg image with KML, so it displays perfectly well in Google ...
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0answers
37 views
Set Color Ramp of Raster using Arcpy
I have a script which creates multiple Raster layers (sometimes more than 100). By default, these are created with the gray-scale color ramp, which for the purposes of my users is almost worthless. A ...
1
vote
1answer
197 views
Color Correction from two nearby Landsat8 Rasters in QGIS?
I have two Landsat8 images and they are side by side, but they are from different Dates. They look similar, but the color of the same forest is a bit different.
I tried a color correction in QGIS ...
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0answers
32 views
Grass Transparent Heatmap
I made a heatmap raster layer in GRASS 7.0.3 and am trying to change the color table so that the lower end is transparent and the higher end is red. Right now if I put the heatmap raster as the top ...
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votes
1answer
87 views
Pansharpened Raster Color Changes After Clipping
I have a mosaic raster of an agricultural area. In the mosaic raster, a specific agricultural field (field no. 5) looks just like this
When I clip the raster with the field's shapefile (shapefile of ...
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0answers
37 views
Same color point and line [duplicate]
I want to have same color for point and line, example:
The road(line) and the street name signs(point) that has any same atribute, for example, name or unique code, to have and same color on ...
3
votes
0answers
170 views
QGIS 3 heatmap, on screen color ramp with data scale
When making heatmaps in qgis 3.0.1 i would like to place the color ramp with percentage and actual numbers for the bin borders on the map.
Each marker under the color ramp represent a percentage of ...
1
vote
2answers
897 views
Displaying different attributes within layer with individual colors in QGIS 3? [duplicate]
I am trying to display different soil types within a geological soil layer with individual colors per each type of soil. As of now it is displaying all as the same color.
1
vote
2answers
255 views
Merging LiDAR tiles without losing data in QGIS?
I'm trying to merge some LiDAR tiles together but when I do, the clarity of the image drops, so I think that means I am losing some data.
How do I merge the tiles and keep all of the data and the ...
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0answers
221 views
Convert GeoTIFF to DWG
I like to convert a georeferenced tif-file into a dwg-drawing.
At first I convert the raster into a polygon. The result is Grey-coloured picture
When I "Export to CAD" the polygon it is still Grey.
...
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0answers
49 views
Batch colour rasters in MapInfo 16
I have say 50 raster files in .ascii
I know I can colour them using the raster -> advanced colour tab. I have saved the colour legend in a .color file.
Is there a way I can apply this .color file to ...
4
votes
1answer
85 views
Creating QGIS map that can be exported and used for 2-colour (spot) printing?
I can produce black and white maps from raster images, with areas blocked out with a single 'Pantone' colour. Provided I use the 'multiply' blending mode, I can overlay the black and white map layer ...
4
votes
1answer
410 views
Adjusting color of raster in QGIS?
Is there a plugin or function in QGIS that allows for RGB raster color adjustments to enhance visibility of specific features captured on a map?
Example:
I'd like to enhance contrast and saturation ...
0
votes
0answers
58 views
In QGIS print composer, pdf in CMY/RGB, dosen't show correct colore after print [duplicate]
By color setting in QGIS, I can only set RGB color but not CMY, so I've taken the cmy color from FreeHand, converted to RGB in Adobe Photoshop. Then exported the map as PDF (in QGIS). Before printing ...
