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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2
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1answer
29 views

If I selected (highlight) a feature or points would I be able to color that feature as as it is being highlighted?

The points on purple and lightgreen area I want to maintain them reds. The points outside that I want to color them yellow not just the highlighted ones. How can I do that?
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0answers
40 views

Using pyshp to create line shapefiles with color

I am using PyShp to create line shapefile in Python. w = shapefile.Writer('shapefiles/line') w.field('name', 'C') w.line([ [[3,2],[2,6]] ]) w.record('linestring1') w.close() Is there a way to ...
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2answers
79 views

How to change the color of a feature with pyQGIS?

I want to iterate through a field and based on the attributes, assign a color to the feature. I can find how to change colors of a layer, but not for a single feature. Code below. from PyQt5.QtGui ...
2
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1answer
28 views

Adjusting brightness/contrast for XYZ Tile Data

Is there a way to adjust brightness and contrast for XYZ tile data in QGIS 3.4? Specifically, I'd like to adjust the settings for the Google Imagery Hybrid XYZ tile. I'm running QGIS on Windows 10.
2
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1answer
29 views

Outputting colour associated with category in text format

I've written a plugin which randomly generates fill colours for differing categories. I'm wondering if there's a way to iterate through the category renderer and output the RGB colour as text. I have ...
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0answers
66 views

Merge *.png files into one using GDAL

I built a Python script that downloads tiles from some map service. This service cannot be imported to QGIS as a tile layer so I decided to download tiles directly using requests module. The script ...
0
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1answer
101 views

Change palette color in Google Earth Engine

I've modified this code: https://code.earthengine.google.com/?scriptPath=Examples:User+Interface/Split+Panel but I can't change the maps color pallet This is the color pallet that I want to use: var ...
1
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2answers
51 views

Mapping RBG color to coordinate possible?

I work with geologists who are trying to figure out how to use Qgis to batch apply colour values to coordinates so that we can visually see differences or patterns. From the attached photo of soil ...
1
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1answer
93 views

Set bar colors on a Google Earth Engine chart

I am trying to define a set of colours by month on a ui.Chart.image.series, however, after adding the .style line, no changes are made. I would like to have a different bar color for each month, the ...
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0answers
44 views

Take color from other layer with data-override/expression

QGIS 3.8, Win. 10. In addition to a question asked earlier, I want to set the color of text-buffers to adapt to the color from another layer in the background. I have a shapeburst-style background (...
2
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1answer
51 views

Changing color of columns names in query builder

Does anybody know if it is possible to change the colors of the names of the columns (attributes) when writing a query in QGIS? (e.g. when selecting by expression in the attributes table).
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6answers
204 views

Rule based coloured background for labeling in QGIS

I am a newbie working on QGIS 3.6 / Windows 10. I need to label a polygon layer which is categorised by colour. (pls refer to attached pic as a graphical reference) The labels need to have a ...
0
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1answer
50 views

High resolution and reasonable cost RGB satellite images [closed]

I need 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 ...
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0answers
27 views

Selecting annotation by color to correct Annotation Class using ArcPy?

I have some municipal data that was converted into a GIS and all of the address numbers were coded as dimensions in the annotation feature class. There is an annotation class for address, but none of ...
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0answers
53 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 ...
5
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1answer
68 views

How to create a saved, consistently available value/color key when styling a choropleth map in QGIS? [closed]

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
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0answers
39 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
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0answers
35 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
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1answer
90 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,...
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1answer
160 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
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1answer
46 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 ...
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0answers
102 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 ...
2
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1answer
149 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)
1
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1answer
93 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
199 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 ...
2
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2answers
86 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
157 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 ...
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0answers
28 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
55 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
83 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
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0answers
31 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
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2answers
87 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
222 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
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2answers
263 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
80 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
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1answer
204 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
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1answer
136 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
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1answer
41 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
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1answer
131 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
17 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
226 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) ...
1
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0answers
48 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
529 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
168 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'...
4
votes
3answers
1k 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
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0answers
205 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
271 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?
4
votes
1answer
165 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
330 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
276 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 ...