Questions tagged [color-ramp]

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

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2answers
119 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 ...
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2answers
505 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 ...
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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 ...
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1answer
130 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 ...
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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; ...
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1answer
212 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 ...
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3answers
911 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 ...
5
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1answer
169 views

Consistent layer colors that are automatically adjusted based on adjacent polygons?

I have several polygon layers and I want to set 4 colors to fill all of those, but the color of one layer should not be the same with the adjacent polygon. I have read several questions about ...
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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, '...
7
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1answer
541 views

Circular color map in QGIS

In order to plot azimuth values for example, does anyone know any good circular color map? By good I mean, visually suited for human color perception. I didn't find any suited color ramp preset in ...
2
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1answer
104 views

Classify area by year

I'm trying to classify a set of buildings (grey) in a layer, according to construction year, in a number of different areas (orange). In Orange – areas with a sum of buildings inside. The ...
9
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1answer
7k views

How to assign colors to specific raster values using R

I am using the levelplot function of the awesome rasterVis package to create a map whose values diverge around zero. I am plotting a raster file using a red to blue palette, but I am trying to assign ...
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2answers
2k views

Defining a color ramp for temperature range & applying it to different rasters?

I'm using QGIS 2.18 (Las Palmas). I have downloaded Climate-Data from WorldClim and I would like to display all of the monthly maps within the same color scale (and I don't mean within Styles always ...
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1answer
596 views

Custom matplotlib discrete colormap with fixed values on raster

I've been using a color ramp with fixed values (0-255) corresponding to specific rgb color (discrete interpolation) for 8bit tifs in QGIS. I've used matplotlib to apply built in colormaps, but I'm ...
6
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2answers
260 views

Heatmap of sold homes with constant cell size?

QGIS version 2.18.5 I'm working with annual house prices in England and Wales with excel columns as: A; Transfer Price B; Postcode C; Lat D; Long. There is approx 400,000 rows of data for 2011. I'm ...
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0answers
593 views

Color ramp that adjusts to changing scale in QGIS? [closed]

Is there a way in QGIS to have a color ramp for a raster layer (DEM layer), which adjusts to a changing scale while zooming in, and out, of the map extent? Here is an online map made based on LIDAR, ...
5
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1answer
5k views

Using a fixed palette range to plot an NDVI raster in R

I would like to plot an NDVI raster with rasterVis packages using the normalized colors from red to green. I don't understand how fix the color scale from 0 to 1 even if my raster value are between 0....
1
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1answer
475 views

Labeling min/max stretch render

I have several rasters that show the percentage of sediment (mud,sand, gravel) at different locations. I followed along with the ESRI "Advanced labeling for the stretch renderer" guide but I am ...
4
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1answer
562 views

Creating graduated symbol classification based on values from multiple columns?

I have three columns of data, each contains data of a different year Y2015 Y2016 Y2017 131 234 234 442 490 234 1231 543 123 1231 888 111 123 3333 333 I would like ...
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2answers
1k views

How can singleband pseudocolor style's values be computed using PyQgis [closed]

In Qgis desktop application there is a button named "Classify" to compute the values in singleband pseudocolor style. Highlighted in yellow in the following image. How can I get those values using ...
1
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1answer
122 views

Using an Esri colour ramp in MapInfo

I have a MapInfo 11 user who wishes to use ArcGIS 10.3.1 colour ramps. I'd like a seamless method to get from A to B. So far I've screen grabbed the ramp and saved it as a raster, exported it to ...
3
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1answer
8k views

Showing just color ramp in legend without values

I'm using ArcMap 10.3.1. Is there a way to show, on the legend, just the color ramp as a single patch instead of with each group of values? I don't really need to show those values on the legend. ...
2
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1answer
651 views

How to manipulate elevation colour ramp in Potree?

I would like to render bare earth LiDAR data with a colour ramp using natural colors instead of vibrant blues to yellow to red. Does anyone know how to manipulate Potree to enable this?
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0answers
41 views

Assigning the same graduated style in PyQgis as the Layer property [duplicate]

I tried to apply the graduated style with color ramp "Blues" in PyQgis and assigned linear interpolation of RGB values with the following code ranges = [] minval = 1.75 maxval = 6.25 delval = 0.25 ...
4
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1answer
501 views

Controlling how Preset Color Ramps are applied to layers in ArcMap using ArcPy?

In ArcMap Style Manager, I have a Preset Color Ramp defined. I would like to control how the colors are applied when doing Add All Values, but it seems colors in the set are applied at random and ...
1
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1answer
206 views

Removing interval limit for Color ramp in ArcMap?

I am Making a program for a DEM I have made, but I have a problem. There is banding in the Color-ramp I have exported from ArcMap, and I can see the individual colors change in the scale. I have set ...
5
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4answers
2k views

Where can I get an archived copy of the ColorBrewer style file for ArcGIS 10?

ColorBrewer palettes are not available in ArcMap. There was ColorTool, a plugin for ArcGIS 9.x developed by National Cancer Institute, but as indicated in this question from 6 years ago, it was never ...
4
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1answer
2k views

Where is plug-in “Color Ramp Manager”?

I am following a tutorial on color-relief hillshades (found here: https://ieqgis.wordpress.com/2015/04/04/create-great-looking-topographic-maps-in-qgis-2/ ) The post is dated 2015-04-04, so - not ...
4
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1answer
930 views

Color palette SAGA GIS

Does anyone knows if it is possible to manually modify SAGA GIS colour palettes, for example using ColorBrewer references?
1
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1answer
381 views

Changing Color Ramp in ArcGIS Online Heatmap?

I have a series of points that are being visualized as a heatmap in ArcGIS Online. The issue is that my team does not particularly like any of the 4 default color ramps offered by ESRI in the "symbols"...
2
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1answer
576 views

Color ramp with legend based on attribute calculation in QGIS

Using the attribute table below, I want calculate a new field using the formula (field3+field4+field5+field6)/field7. Field 7 will be always larger than the addition of fields 3 through 6, so the new ...
2
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2answers
753 views

Changing categorized style color simultaneously in QGIS?

I work with this polygon: and i need that all features will be with border line only without fil colors. I seek for a way to do it simultaneously to all the categorized features, and not treat every ...
1
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1answer
68 views

Graduated style- Qgis 2.12

I try to represent point layer with different size and i want to have a color ramp also: The problem is that when i choose the color method, the size method disappear: I can change the color ...
0
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1answer
865 views

Multiple attribute symbology in ArcMap

I have a layer I need to symbolise with graduated colours based on one field and graduated symbols based on another field. Sizes are based on a field that stores a count (range 1 to 50). Colours are ...
2
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1answer
603 views

Add multiple rasters using QgsRasterLayer with for loop

I am trying to create a for loop for coloring up multiple rasters simultaneously. I am able to do it for one layer, but trying to implement the for loop to do it for more than one layer is proving ...
5
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3answers
970 views

Is there an automatic way to create a diverging colour scale centered around zero?

I'm trying to plot a map of the residuals of a linear model. My residuals centre around zero and can obviously go in either direction. Is there an easy way to apply a graduated colour scale to these ...
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 ...
8
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5answers
2k views

Color ramp resources other than Color Brewer?

I am looking for more resources on color theory in cartography. When to de-saturate a color? Or if you start with one color, how do you create a ramp from it? RGB or HSV? I can hack at it and come up ...
1
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1answer
35 views

QGIS interactive gradient editor - already available?

i have found several links on the "new interactive gradient editor" - which seems pretty interesting and comfortable !!! the features shown in a youtube video are promising, but i didn't find any ...
2
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1answer
745 views

How to change color ramp interval size in QGIS 2.12?

I'm working on elevation data and I'm trying to change the interval size to 50 meters in the layer's style. I created a color ramp color interpolation on the elevation layer. The values are between 8-...
2
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1answer
116 views

Reverse colour-ramped DEM to its original elevation value?

A have a GeoTIFF LIDAR image which display DEM in its color-ramp version (color relief) from blue (minimum value) to red (maximum value) and green (in between). I don't have the original elevation ...
2
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1answer
336 views

QGIS raster no data value changed to -inf when viewing at smaller scale

I have a raster with some no-data cells. I want to visualise raster values using a colour map and set the no data values to transparent. I am attempting to do this using the transparency tab in the ...
11
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3answers
14k views

Color Ramp in QGIS

This is a real basic question, but I can't seem to find it. How do I add a color ramp in QGIS? I noticed that has different applications you can add to QGIS (like RdYlGn, GnYlRd, cpt-city, etc...) but ...
3
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1answer
819 views

Color gradient to show direction in polygons (filling, color ramp, gradients)

My data is 2 point-layers: 1 layer origins and 1 layer destinations. I connected these pairs of origins and destinations: firts with lines. As I know that in qgis, there is still no gradient fill for ...
1
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1answer
577 views

How does GeoServer/RasterSymbolizer ramp interpolate?

I want to encode data using a colormap using GeoServer/RasterSymbolizer, by mapping data using the full 24 bits in RGB. I am thinking of the following scheme: <ColorMap type="ramp"> <...
3
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2answers
957 views

How can I handle NULL values in a color ramp? [duplicate]

I'm mapping areas in QGIS 2.12 based on average pricing, using area polygons (PostGIS) joined with a CSV data table that doesn't have values for areas that didn't have any sales. I'd like to 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 ...
3
votes
2answers
273 views

Applying colour ramp to DSM in ArcGIS using real elevation values as colour cut-offs?

I have a topo-bathymetric lidar DEM that I need to construct a CSR for in ArcGIS 10.3. I know how to make colour ramps and personalize them, but I'm wondering if it's possible to make a ramp based on ...
1
vote
1answer
657 views

Giving color ramp for our data based on values using cartodb api

I have average values in the data stored in an array. Based on these average values, does CartoDB have functionality to fill the polygons in different color?Like if I give minimum and maximum values ...