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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13 views

Tool to colorize Pointcloud from 360° Laserscann

I have a Pointcloud with panoramic images that I want to colorize. What tools could I use for this. I looked into PDAL but from what I read, PDAL needs orthographic pictures. Is there another tool ...
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24 views

Coloring heat map, with custom characteristics

I need to color a "heat map", with these characteristics: "Pseudocolor monoband", "Discrete" and with two levels: <= "STATISTICS_MEAN" -> Color 255/255/...
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What do the quantitative values for the colour ramp gradient for heatmap style in the layer properties for QGIS signify?

I would like to understand whether any quantitative values can be extracted when using the heatmap style in the layer properties? I assume areas with colours related to 1 are areas which have the ...
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34 views

Setting transparency for range of colors in raster layers in QGIS

The starting point: Loading a raster to QGIS, you can set individual colors to transparent in the Panel Layer styling / Tab Transparency by activating the icon Add values from display and click on the ...
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34 views

How to programmatically create a bivariate choropleth in d3.js?

Question and Situation I'm using d3.js to visualize some data on a map. The user clicks on one checkbox and all path elements get filled according to a color-preset, which all works fine. Now what we ...
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25 views

Switching between symbologies for two different fields quickly in ArcGIS Pro

I'm trying to quickly switch between two different coloring schemes for my map quickly. I have a map filled with several polygons that are colored according to a particular field. The image for that ...
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10 views

How to set polgon fill type to no color in Mapbox

I'm new to Mapbox and I am trying to remove any color in my polygon fill using the Mapbox API. Note: I don't want to set opacity/transparency. I simply want there to be no color. It keeps defaulting ...
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22 views

Merging TIFF images based on any of the single images

I have lot of tiff images for a small area. I need to merge all the images based on any one of the image(for color ref). Actually we merge the data in QGIS but all images all slightly variation in ...
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28 views

How can I do to export shapefile with symbology.svg COLORED to DXF format?

I created a shapefile categorized by characteristics, and I assigned to each element a SYMBOL.svg COLORED with Design Effects. I want to export the shape with the characteristics of the colored ...
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49 views

Generate N distinct colors which (alpha) blend in a nice manner when overlaying an orthophoto or a map

I have N polygons (let N = 3 for making it simple) to display onto a base map in an OpenLayers application (but this can also naturally be applied to other GIS softwares as well). For the moment, I ...
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223 views

Generating random muted/pastel colours using QGIS

Is there any way of generating random softer colours using QGIS? I've just spent some while looking, unsuccessfully. There seems to be no way to influence the "seed" colour if they're random ...
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1answer
31 views

QGIS 3.4 Vertex tool highlight colour change

I can change the colour for selected items fine. I have even figured out how to change the colour of the preview when moving a vertex. How can I change the colour of the highlight when hovering over a ...
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Color-correcting/matching 4-band PlanetScope imagery

I've been trying to color correct/match 4-band (R, G, B, NIR), 3m resolution Planetscope surface reflectance imagery in order to create a mosaic for land-cover classification. At this point, I believe ...
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237 views

Colouring points in the same colour as their nearest point/polygon from another layer in QGIS

I got two files, a multi-polygon file with polygons and points (File 1) and a file with points only (File 2). Our task is to fill the color of the points from File 2 with the respectively nearest ...
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56 views

Setting transparency color in Expression Builder

Using QGIS 3.16, I am trying to set color through expression builder, using #RRGGBBAA format. The problem, I was using the same color, let's say '#94AFDCff', it should return the same color as '#...
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93 views

Use multiple colors in the same OpenLayers label

I made the following code that assigns a style to the field labels. Now I would like each word or group of words in the label to be a different color previously selected by the user. For example if we ...
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Change color single layers OpenLayers

I want to change the color to a layers after the user has selected the color from the interface what have I done so far: var imobile = new ol.layer.Vector({ source: vectorSource.teren }); $('...
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1answer
18 views

Giving points in the same delimited text layer multiple colours-while using point displacement

I want to give multiple colours to points within the same delimited text layer, while using point displacement, looking for advice on how best to do this. The data are showing occurrences of a variety ...
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15 views

Showing legend with categories using a hexadecimal color scheme

I have a polyline vector layer with in one column the route number (of the bus) and in another the hexadecimal color (eg 'FF88AA'). Preview: I know how to style the file but only by using the single ...
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1answer
246 views

Assigning symbol and colour to attributes using Arcade expression and ArcGIS Online

I would like to use an Arcade expression in ArcGIS Online web maps to assign a symbol and a colour to different attributes. For example, if the attribute value is 'yes': the symbol is round and has a ...
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29 views

Color change loading GeoTIFF into QGIS

I have a JPEG RGB map image composed of 12 colours produced by a programme using a colour palette. It converts correctly to a modified TIFF, which prints out correctly. But when this is loaded into ...
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43 views

Importing colour map from .text file which will then correspond to geologic shapefile on QGIS 3.10.6

I have been searching for this solution for over a week now and have tried many of the suggested solutions online but so far northing has worked. I have a Geology vector layer and a corresponding RGB ...
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3answers
111 views

Categorized symbology for polygons using QGIS

In QGIS (using ver. 3.16) , you can use the categorized symbology renderer for polygons to assign a certain color to polygons with the same attribute value. There is also the Topological coloring ...
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32 views

Adding colour range to grid in QGIS

I am doing some mapping for vegetation monitoring across a site. I have divided the property up into quadrats using the create fishnet grid function at the size I wanted. I have then intersected it ...
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223 views

Converting a GeoTIFF image from RGB to gray scale using Rasterio or GDAL in Python

I was using PIL to convert some images from RGB to gray scale in Python, but this code does not work well for GeoTIFF files. It seems that PIL does not seem to work with with GeoTIFF files in ...
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1answer
97 views

Changing the color of every entity of GeoJSON layer in OpenLayers 6.4.3

I would like to change the color of every entity of my GeoJSON, like in the picture. For now I can just change all the features with the same color. Here is my code: const provinceGeoJSON = new ol....
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307 views

Changing (or just inverting) Basemap Colors in QGIS

I am building a vector (strava routes) map using QGIS and the Stamen Toner OSM Basemaps but want to edit it to change the colors of the baseman slightly. Is this possible? I see Arc seems to have a ...
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45 views

Editing processing toolbox algorithm “Vector Layer Histogram” output

I have a vector/shapefile layer with around 1500+ individual symbols. Each symbol has an attribute 'EVIMean' that I need to use for a histogram and it is a numeric value. I first tried the default ...
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11 views

Solving color correction of LISS IV Multispectral image

I have a LISS IV multispectral images (radiometric resolution of 10 bit per pixel) taken in different months 4 tile in January and 2 tiles taken in February. While mosaicing, I got a different color ...
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220 views

Grading layers according to CMYK color codes in Attribute Table

I have been trying for some time to color grade a geological map according to CMYK values given in the attribute table. I have not yet succeeded. I am certain that is just a simple line of code that ...
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1answer
55 views

Modifying highlight color of identify but from the startup file

I want to do it in programming, I use PyQGIS. I was researching what the class uses qgis.gui.QgsHighlight (mapCanvas:QgsMapCanvas, geom:QgsGeometry, layer:QgsMapLayer) But I would like to do this ...
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1answer
36 views

Control the colours of shapefiles loaded to Geoserver? [duplicate]

I have a set of shapefiles loaded to GeoServer, which I later deliver as a WMS. All the shape files are rendered in the same neutral grey, which makes it quite difficult to tell apart which shape file ...
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1answer
55 views

Making colours from table with colour percentages/RGB-codes

Currently, we have a big dataset imported in our QGIS profile. Normally we would have imported this by WMS but because this particular WMS/WFS consists of more than 20 parts and the data is ...
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62 views

Is it possible to display the embed color palette of a TIFF file using earthPy?

I try to display a map that I have created. This map embed a color palette that I can read in QGIS to obtain directly this kind of display : I discovered recently that I can as well directly plot ...
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42 views

Customize color pallets widget

I use some color palettes (1) that I added through QGIS settings and I would like to know if it is possible to customize how these palettes are displayed in the Layers Properties or any popup widget ...
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1answer
115 views

Falsecolor raster from multiple rasters in QGIS

How can I combine multiple single band rasters into a falsecolor RGB background in QGIS? I can, of course, use the multiband color renderer to select specific bands, call them A1,A2,A3 from a single ...
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In ArcGIS Pro, how can I transfer the color scheme to other maps so that the same color is maintained for each class?

In ArcGIS Pro, how can I transfer the color scheme to other maps so that the same color is maintained for each class? For example 2,1-4,0 degrees Celsius "deep blue". Class 4,1-6,0 "...
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2answers
108 views

How to have an infinite colour ramp for a choropleth, in QGIS

I have a dataset of land values which, for the full range, is say 125 to 250,000,000, i.e for a whole state. For the user, they will only be seeing on the map canvas, a small subset of this at any one ...
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63 views

Changing color symbol legend by field

I changed the color of the polygon symbology with a specified field. Now, I need to categorize the symbology for better data management and to be displayed on a map. But, this not change the legend ...
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73 views

Export to PNG produces wrong color background (but not for JPG)

I need to export a map as a PNG image, but when I do the background, which is supposed to be white, comes out gray. This also happens when I export it as a TIFF or EMF, but not as a JPG. I have tried ...
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20 views

Getting currentfeature's color in Expression Builder of QGIS 3.xx

I want to obtain the color code of the current feature like this : Getting currentfeature's color in Expression Builder of QGIS? But I am in QGIS 3.14 and I dont understand how to convert the ...
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85 views

Continuous colour gradient within line segments in a vector layer

I am new to QGIS (using version 3.13) and my main objective with it is easy to explain: creating a line vector (multiple points, representing a river) in which the colour of the line changes based on ...
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27 views

TIFF image merge colour distortion

I am trying to merge 4 TIFF files and the resulting merge is coming out with some odd colour distortions. Does anyone know how to resolve this?
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1answer
18 views

Generating a graphic for publication: How to change color and border weight of shapefiles in ArcGIS Pro 2.4.0?

I am trying to generating a graphic for publication. I am using ArcGIS Pro 2.4.0, and I am trying to draw a border around experiment plots using a rectangular shape file. As can be seen in the below ...
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1answer
59 views

Creating color ramp based on quantitative range

I have a set of polygons with correlation values. I would like to color each polygon based how strong their correlation value is where 0=lightest and 1=darkest. This means if I have a set of three ...
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2answers
83 views

Randomly coloring provinces in country map? [closed]

I have created a map of a country in QGIS. How do I color the province individually ? Is there a quick way to randomly coloring all the province of a country. I am using the "...
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1answer
119 views

Cannot set the natural color for Sentinel-2 raster data

I'm trying to create a new raster data with nature color (B4-B3-B2) for the left raster data in QGIS 3, however, I failed. This should be similar to the right one. Both of them were downloaded from ...
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1answer
30 views

Applying a Single Gradient Fill Color to a multipart feature

So I have an indicatrix covering a world map for the purpose of illustrating distortions for different projections. I want the circles of the indicatrix to share the same gradient fill color, as ...
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1answer
270 views

Multi-labelling with different colors in QGIS 3.10

I would like to create a multi-field label based on an expression where the different fields will have different colors. Using an icon font, this will allow me to get this kind of result (done with ...
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1answer
290 views

Scripting color palette to align with corresponding classes from supervised classification in Google Earth Engine

When I display my classification map, the colors don't line up with the variable that I want them to. For example, my forest category is represented as red (instead of my goal color-green), or my ...

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