Questions tagged [color-ramp]

A range of colors used to show ranking or order among classes on a map.

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1answer
170 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 ...
4
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0answers
787 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 ...
3
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0answers
49 views

GDAL ColorRamp for Float Based Values

I have a performed band calculation to calculate the NDVI grayscale. It has float based values on a single band, between 0.0 and 1.0 respectively. I am attempting to colorize the single band via ...
3
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0answers
291 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 ...
3
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0answers
134 views

Rendering using color ramp for negative value in PyQGIS

I'll try to rendering single band raster (GEBCO bathymetry) by using PyQGIS.. This is my script so far bathymetry_file = "E:/byth_gebco.tif" layer_bathymetry = QgsRasterLayer(bathymetry_file, '...
3
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0answers
70 views

SOL help in QGIS: rule based styling to show timestamp increase via gradient

I have some polygon data from a tractor that shows it's route among other things. It has a timestamp column which I'd like to use to show the route in which the tractor drove through the field via a ...
2
votes
0answers
93 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 ...
2
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0answers
317 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 ...
2
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0answers
751 views

Adding a custom color scale for a sp.points layer to levelplot() legend

I'm wondering how I can add a customized color palette that I used to display a sp.points layer in a call to levelplot (lattice plotting) in the rasterVis package in R. I used a function that Dave X ...
2
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0answers
160 views

Random color ramp issue

I have one set of polygons and one set of points sharing a common attribute (value 0-503). When applying style with new random color ramp (Categorized) the first set of polygons is displayed ...
1
vote
1answer
27 views

How to combine color ramps for two different layers?

I have two layers that contains 5 polygons each with their own values. I would like to make a global color ramp that encompasses both layers. But I am not sure how I can do this. I have tried setting ...
1
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0answers
57 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
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0answers
120 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 ...
1
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0answers
101 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
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0answers
99 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(...
1
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0answers
118 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 ...
1
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0answers
362 views

Adding graduated color to line based on data using QGIS?

I have a line that I would like to color based on some data points that I have along its path. I'm not sure the best way to go about this. Should I try to break the line up into many segments? ...
1
vote
0answers
249 views

How to get full 16 bits range using RasterSymbolizer and ColorMap ramp?

I am attempting to get the full 16 bits values of my DEM (stored as TIFF files) rendered in WMS tiles (png format). For this I use GeoServer 2.5 and a RasterSymbolizer with a ColorMap of type "ramp". ...
1
vote
0answers
429 views

How to create a color ramp to change the color of a svg image in arcgis javascript api

I have an SVG image to create a PictureMarkerSymbol for a feature. How to create a color ramp to change the SVG color based on a criteria, like a attribute on my feature? The idea is like that: var ...
0
votes
1answer
15 views

How to create a color ramp based on a 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 3 ...
0
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0answers
18 views

R nightlights color palette blue to yellow

I would like to plot nighttime light images in R using traditional NASA used color palette from blue to yellow. Does this color palette exists in any package?
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0answers
14 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 ...
0
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0answers
85 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
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0answers
33 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
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0answers
300 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; ...