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
307
questions
0
votes
1answer
23 views
High resolution and reasonable cost RGB satellite images
I want to obtain high-resolution RGB satellite images with reasonable cost for Pakistan. The objective is to guide tourist on high-resolution GIS maps. Google Earth does not have very high resolution ...
0
votes
0answers
8 views
Color range in palettes [on hold]
How to set color range for specific NDVI values?
like: -1 to -0.8 = red, -0.8 to 0 = green, 0 to 1 = blue .. etc?
1
vote
0answers
45 views
Seeking comprehensive information on how to create beautiful and artistic cartography? [closed]
In many circumstances I experienced how powerful maps can be because a key decision maker just enjoys looking at a beautiful representation of facts instead of reading 10 pages of text. I have a ...
3
votes
1answer
30 views
How to create a saved, consistently available value/color key when styling a choropleth map in QGIS?
I've created a simple choropleth map representing birthplace data for the US, by PUMAs, for a particular shapefile (e.g., the layer shapefile_1):
I've categorized the value for each of the PUMAs ...
2
votes
0answers
30 views
Convert bitmap image to adjacency [closed]
I have a map in a bitmap image format (.bmp) where each region is assigned an RGB colour. What I want is a list of every adjacent region, for every region.
So if region1 is adjacent to region2 and ...
2
votes
0answers
25 views
Unifying color scale of different tiles in Google Earth Engine?
I found some other posts asked the similar questions but in different tools like ArcGIS, GDAL, QGIS etc. What I want to ask is how to do this in GEE.
Now I have removed the bad observation pixels (...
1
vote
1answer
35 views
How to crop raster in R without losing the colors?
I have a 2x3 raster in R, with values 1 to 6.
library(raster)
r <- raster(nrows=3,ncols=2,xmn=0,xmx=2,ymn=0,ymx=3,vals=1:6)
colors <- c('red','orange','yellow','green','blue','purple')
plot(r,...
0
votes
1answer
52 views
GeoServer polygon transparency (SLD style file)
I am trying to add transparency to a set of polygons (city bounds) within a .sld style file for OSM. Please see below:
As you can see the city bounds are overlapping Montana State University. My ...
2
votes
1answer
38 views
Using multiple colors for labelling that depend on values in QGIS?
I would like to do labelling like this (3 rows):
Location_name
Time
People
My csv has 5 features
Location_name Time AM/PM People A/K
Based on the value of "AM/PM", I want the ...
0
votes
0answers
54 views
Changing color of GeoTIFF using GDAL and Mapbox?
I have a geotiff that I am importing to a mapping software that I want in the color pink. It is currently a white image, and I would like a GDAL option to change the color.
I am using Mapbox, which ...
0
votes
1answer
70 views
QGIS color map format
What is the correct color map format (.txt) for a color map I want to load in the Raster Layer Properties/Symbology menu of QGIS (v. 3.6.0)
0
votes
1answer
50 views
Forcing color ramps to center around zero in QGIS
I have several columns of data that have percentage values. Some are positive and some are negative. In one particular column, the values range from -0.70 to +0.20. The mean value of the column is ...
2
votes
2answers
168 views
Adjacent DEM color matching in QGIS?
I have four 15 arc second resolutions DEM files (15-C.tif, 15-D.tif, 15-I.tif, 15-J.tif) downloaded from viewfinderpanoramas.org. When I input them in QGIS I noticed that the 15-J.tif layer differs a ...
0
votes
2answers
33 views
Commandline tool to change RGB value of GeoTIFF
I would like to change the rgb-value of raster-tiffs from 0,0,0 to 1,1,1.
Is there a commandline-tool that can change the rgb-values of GeoTIFF files?
At the moment I use irfanview to change the ...
2
votes
1answer
77 views
Change color of part of the line in QGIS
Imagine a few km long pipeline. Pipeline consists of 4 types of pipe. Those types are alternating.
0 - 200m A type of pipe go. (Green color)
200 - 230m B type of pipe etc..(RED color)
230 - 380m C ...
0
votes
0answers
20 views
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
51 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
votes
0answers
66 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 ...
0
votes
0answers
26 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
83 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
121 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 ...
1
vote
2answers
128 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
vote
1answer
53 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
147 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: ...
0
votes
1answer
80 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 ...
1
vote
1answer
37 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.
0
votes
1answer
65 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 ...
0
votes
0answers
15 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
votes
2answers
169 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) ...
0
votes
0answers
143 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
vote
0answers
36 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
221 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
87 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
854 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
147 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 ...
-1
votes
2answers
177 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
votes
1answer
83 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
230 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
149 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
109 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
votes
0answers
57 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
428 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
85 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
73 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
479 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 ...
1
vote
1answer
164 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, ...
1
vote
2answers
551 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
334 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
53 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
vote
1answer
338 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 ...
