Questions tagged [color-ramp]
A range of colors used to show ranking or order among classes on a map.
135
questions
3
votes
0answers
39 views
What is tilde (~) for in R? [closed]
I know this is an almost too simple question. But maybe there is a fast answer. Looking through some code to build a leaflet map in R I found that part of code:
mypal = colorNumeric(
palette = "...
0
votes
0answers
10 views
Assigning “parent” color palettes in Leaflet (using R)
I'm working on creating a map using Leaflet. You'll notice in the first step, I break out each county into four different "regions". I then join it on another geo file of smaller territories within ...
3
votes
2answers
169 views
Apply a color ramp to vector layer using PyQGIS3?
I'm trying to apply a color ramp to a QgsGraduatedSymbolRenderer in PyQGIS 3 (QGIS 3.8) using the following code:
Getting the QgsGradientColorRamp:
myStyle = QgsStyle().defaultStyle()
...
0
votes
2answers
113 views
Apply external choropleths in QGIS 3
I have a large number of cloropeths stored in SLD and QML formats. QGis is unable to apply any of those, there is no option in the GUI for SLD, whereas it fails to apply QML files correctly.
Is there ...
2
votes
2answers
141 views
QGIS Time manager Changing Color Polygon
I'm using QGIS 3.6.3. Noosa.
I have 10 polygons, each has a starting time and an end time. Getting Time Manager to run was no problem at all. However, there are two things I would like to add in my ...
2
votes
0answers
47 views
Discrete color ramp in QGIS
This seems basic but I am new to QGIS and I can't find how to do it. I have three shape files each with the same attribute. Each shape file is imported into its own layer. Each shape file has ...
1
vote
1answer
35 views
Proper way to share raster layer
In ArcGIS I have used to share a shapefile (for example beach areas) by sending a package that contains different files (.shp, .shx, .prj, .cpg, .dbf, .sbn, .xml) which contains all necessary ...
2
votes
6answers
211 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 ...
2
votes
1answer
196 views
Making colored hillshade in QGIS?
Today I found that ArcGis can make colored hillshade like on piture below.
Here is link to their blog. I want to do that in QGIS. I know about layer coloring feature, and it's close for perfect, but ...
1
vote
0answers
54 views
Setting color assignment order with ArcPy?
I have a shapefile feature class with the following attribute table:
I set the shapefile symbology using these lines:
lyr.symbology.valueField = "GRIDCODE"
lyr.symbology.addAllValues()
What i get ...
1
vote
1answer
123 views
Apply color ramp to (QgsSingleSymbolRenderer) Simple marker
I'm using a QgsSingleSymbolRenderer to display various points and lines etc for a Line geometry.
I have a Single symbol symbology to display the last vertex as a: Line > Marker line > Marker &...
1
vote
0answers
78 views
Making color text file using GDAL?
I have an 8-bit greyscale image that I want to convert to a "heat map" based on data values (0-255), using a color ramp. I'm aware that gdaldem works with color-relief, so I used the following steps ...
0
votes
0answers
66 views
GeoServer: colormap for point data
How could I create a continuous colormap for point data in GeoServer?
I am planning to serve satellite measurements (METOP IASI) as point data in GeoServer 2.15 and want the point colors to represent ...
0
votes
0answers
29 views
Normalizing Elevation data in ArcGIS Desktop?
I went to do a natural break scale on elevation data for a few long distance hiking trails. The problem is there was just to much data for ArcGIS Desktop to analyze. The sample it came up with was ...
1
vote
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 ...
0
votes
1answer
115 views
User-Scaled Color Relief Map to Google Earth from DTM
I have a DTM file, and my goal is to load it up onto Google Earth as a color relief map, with the colors gradient at levels I chose. I have successfully done this with RAS MAP using HEC RAS software, ...
9
votes
1answer
237 views
Apply a different color ramp to subset of categorized symbols in QGIS?
The goal is applying a color gradient to a subset of symbols, instead of applying it to all the existing symbols. I used to do this in ArcMap. In QGIS I have to do it manually, and it's very time ...
0
votes
0answers
27 views
2-color color ramp in QGIS [duplicate]
I'm working with QGIS Desktop 3.4.4. I want to use a color ramp in order to have several gradual color classes with the positive numbers going more red and the negative numbers going more blue like on ...
0
votes
2answers
68 views
Displaying rainbow colors for multiple polygon layers in ArcMap?
I am working with ArcMap and I have a series (20) layers - polygon lines in a group. I would like to ask you a way to color (not manually) all the lines with a rainbow color palette. The lines are map ...
1
vote
2answers
263 views
Calculate 16-bit elevation values from a 32-bit RGBA image?
Say a single-band 16-bit (UInt) raster with values representing elevation (meters) must be converted to a 32-bit RGBA PNG image (8-bits/band) for use in a web application. The image dimensions must be ...
2
votes
1answer
176 views
How to delete custom color ramp in QGIS?
I have customized a new color ramp in qgis. Now I want to delete that. I could not find any way to delete this.
3
votes
1answer
199 views
Force a minimum value in a color ramp classes in QGIS 3.4.1
I am trying to apply a color ramp to a shape using percentage values where red would be low and green would be high. The data ranges from 74% to 100%, but I need the minimum value to be 0%, so that ...
1
vote
0answers
80 views
Transfering color style from one raster to other rasters using QGIS?
I have a raster set and I need to classify them using the "pseudo color singleband" with "RdYlGn". What I'm trying to do is classify a raster and copy the style to the others, but it does not work ...
1
vote
1answer
248 views
QGIS: where are custom color ramps stored?
Using QGIS 3.4.0, I have created a new custom color ramp, using:
Settings > Style Manager > Color ramp > green plus sign
I saved the new color ramp as follows:
The color ramp works just fine.
Out ...
2
votes
2answers
153 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 (...
0
votes
1answer
624 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 ...
0
votes
0answers
30 views
v.surf.idw raster file conversion into a vector with same colours style
Is it possible to convert from raster to vector the raster file resulting from grass interpolation algorithm "v.surf.idw" coloured with the quantile method and maintain such colours in the vector file ...
0
votes
2answers
48 views
Making colours proportional to value field, continuously and not discretely as with graduated colours classification in ArcGIS Desktop?
Under symbology in ArcGIS, there's the option to graduate colours given a value field, a colour ramp, and some classification.
How do you make the colour graduation continuous (rather than discrete ...
5
votes
2answers
566 views
Creating new QGIS color ramp from r,g,b text file?
I am using QGIS 2.18.22
I would like to create the Cividis color ramp in QGIS. Here's a (non-cartographic) display example of Cividis:
Source
Cividis' creators have made public a 256-line r,g,b ...
5
votes
2answers
376 views
Creating graduated point circles in ArcGIS Desktop?
I have not been giving any data, but I have been told that I could be expected to recreate maps In ArcGIS 10. Below is an sample portion of what I may have to recreate. I have no idea how to get ...
3
votes
1answer
883 views
Downloading image/exporting image to google drive from google earth engine with color palette
When I download Analysis results from Google Earth Engine, the image is exported in to google drive but it does not have a color palette. How do i add color palette with the exported image using earth ...
1
vote
1answer
303 views
QGIS Color Ramp Apply
I have almost 100 of single band grayscale rasters. Importing all of them one by one to QGIS and changing the color ramp seems laborious. Is there any PyQgis codes/function that can apply predefined ...
2
votes
0answers
253 views
Applying Color Ramp in PyQGIS?
I extensively use ArcPy, recently needed to apply a specific color ramp on a single band raster and export it. Arcpy does not allow me to apply color ramp and save the raster with the applied color ...
1
vote
1answer
231 views
Polygon layer symbology not displaying correctly in QGIS 3
I have a polygon layer with multiple attributes. I want to display a color ramp for one of those fields (which is a "real" number field calculated using 2 of the other fields).
The problem is, when ...
3
votes
0answers
241 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 ...
4
votes
0answers
638 views
Add color palette to grey-scale land cover GeoTIFF
I have a single band grey shade tiff image which does not have a a color palette associated with it. I need to open up the symbology and assign a color to each unique landcover class.
I am looking ...
1
vote
2answers
708 views
Why North direction is shown in red color on aspect maps?
I have been recently exposed to an aspect map that looked like this:
I wonder why North-y orientations (N, NE, NW) are shown in red and orange while South-y orientations (S, SE, SW) are shown in ...
1
vote
0answers
214 views
Making CIR imagery in QGIS
I want to compose a CIR image in QGIS. Images are part of sample dataset downloaded from Micasense website.
I built virtual raster out of Red, Green and NIR rasters but the output file color scheme ...
4
votes
1answer
398 views
Resolve why R is not using the full colour ramp in the package tmap
I am creating a map using tmap with a quantitative variable that I wish to use for setting the polygon colours. When I set the colour ramp using a standard RColorBrewer palette or with a custom vector ...
3
votes
2answers
392 views
Preset Color Ramp in ArcGIS Desktop?
I am trying to make a custom color ramp by using preset color ramp in ArcGIS 10.5. I need to show 19 colors. The default number of colors that can be input in preset color ramp is 13.
Is there any ...
1
vote
0answers
92 views
pyqgis custom color ramp raster dataset
I want to create a custom raster color ramp using pyqgis in a standalone app.
I have found some examples about this task, for example:
s=QgsRasterShader()
c=QgsColorRampShader()
c.setColorRampType(...
3
votes
3answers
520 views
Save an edited color ramp as a new color ramp in QGIS 2.18
Is there a way to save an edited, pre-existing color ramp as a new color ramp, or export the edited color ramp in QGIS 2.18.xx?
I'm able to take an existing gradient ramp, say, "Blues", and edit it, ...
0
votes
2answers
107 views
Symbology forMultiple Attributes in ArcMap?
I need some help to map landslide proximity to urban areas and their size on ArcMap 10.5.1. I am unsuccessfully trying to use symbology by multiple attributes. The data is point data but within the ...
1
vote
2answers
394 views
How to export raster file with a known color ramp?
I have a single band raster file( that it is Grayscale) and I changed its symbology to unique value with a Known color ramp.
How can I save this raster file with its color ramp (to .tiff) so that it ...
1
vote
0answers
105 views
How to Center a Split Colour Ramp on Zero in Arcgis?
I have a number of different rasters with different ranges. I want to display them with defined intervals of 10. Values range from -200 to 400 varying for each raster. I want to symbolize them with ...
4
votes
1answer
120 views
Apply color ramp to marker outline
I have a point layer in QGIS 2.18.14. I have colored the points based on a category, using the YlOrRd color ramp. Now I am trying to change the outline of each point marker to be slightly darker than ...
0
votes
0answers
280 views
Sharing custom made color ramps in ArcGIS Desktop?
I've successfully created a custom color ramp in ArcMap (v. 10.3). From the Style Manager I can see the path to where my custom color ramp is located, but I'm unable to locate that path on my machine; ...
0
votes
1answer
191 views
Understanding symbology in IDW interpolation using QGIS 2.18
Continuously to Understand ramp color interpolation using QGIS 2.12, I used IDW interpolation on those height point without inserting the real values (minimum value is 8 meters, maximum value is 584 ...
1
vote
3answers
722 views
Creating 4 part color ramp in ArcMap?
I am using ArcMap 10.4.1. I am trying to create a custom color ramp that only has 4 colors, as defined by the company I work for. I am trying to create the color ramp through the Style Manager but the ...
