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Questions tagged [colormap]

represents a transformation that maps pixel intensity values to colors.

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GeoServer not showing values for NetCDF 0/1 file

I have a simple NetCDF file consisting in 4 dimensions (fulmini, lat, lon, time - being the latter the result of a selection of all the data from a certain time), and I'm trying to load it in ...
Mattia Scalas's user avatar
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GeoPandas colormap normalization for folium explore

When creating static plots a GeoDataframe with matplotlib, I can use colormap normalization to plot data on a robust scale centered at zero. For example as shown in this question Center / normalize ...
ogb119's user avatar
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2 votes
2 answers
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Colorizing polygons based on a user-defined color scheme determined by the column value

I have a shapefile, and the population density for each polygon is provided in a separate CSV file.I would like to assign colors to each polygon based on a user-defined color scheme determined by the ...
user240392's user avatar
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The map color display in GEE and QGIS is different

I'm new to in Google Earth Engine and QGIS. Lately I try to export map from Google Earth Engine and then i opened the map in qgis. Sadly, the map color in Google Earth Engine is not the same in QGIS. ...
SyukurToha's user avatar
2 votes
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ArcPy AddColormap method adds too many symbology values

I'm having an issue with trying to use a Colormap on my map that symbolizes plant hardiness zones. When I try to use arcpy.management.AddColormap to use a somewhat custom Colormap that I created and ...
Bodrew's user avatar
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1 answer
970 views

Discrete colours in Geopandas map

I am making a map in Geopandas, whereby I want to discretely color the different vegetation protection classes - "VMA_CAT". The vegetation protection classes are: B - E-dom, B - O-dom, B - ...
Colin Clark's user avatar
1 vote
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61 views

Problem with color scaling for rasters [closed]

I just opened QGIS to be able to make plots and now I notice that I can no longer do color scaling as before. The problem is shown in the following screenshot. I uninstalled and installed QGIS several ...
Marco Fiorentini's user avatar
5 votes
1 answer
388 views

QGIS singleband pseudocolor color interpolation

In QGIS when defined a singleband pseudocolor symbology, the interpolation between 2 steps acts in a way I can't seem to understand. Take for example step 1 and step 2: Value 0,0000002 is defined ...
Hoetmaaiers's user avatar
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148 views

Updating sldstyle based on user choice

I use sldstyle to create a discrete colormap for plotting images in Google Earth Engine. Like this: var assimvalue = 1; // desired upper limit. //set up the 11 intervals var assimstep1=-(assimvalue/5*...
dfhill's user avatar
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3 votes
1 answer
178 views

Looking for QGIS equivalent of ArcGIS "Delete Colormap" tool

I have many TIF rasters with colormaps. In ArcGIS I can delete these with "Delete Colormap" tool. Is there a QGIS equivalent of this tool, or some other way of deleting them?
Bera's user avatar
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2 votes
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Specifying color in ArcGIS Pro from the external text file for Attribute Table function

I am working with 16-bit signed raster image mosaic dataset in ArcGIS Pro 2.9.0. I use Attribute Table function to specify classes' names using external table: While this function works and gives me ...
Joanna's user avatar
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1 vote
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Visualising a Raster (KAP open sea map file) using python with rasterio how do I get the colours correct

I have just started using rasterio to show raster maps in Python. I want to display some OpenSeaMap (KAP raster format). I have started with a single kap file, I can load and display a single kap file....
Tuckers's user avatar
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Color map from random raster in QGIS

I am trying to create a color map overlay of sound levels from a known source using QGIS (3.8). The results of the noise calculations come out as a raster in polar coordinates (NOT rectangular), ...
Bruce Ikelheimer's user avatar
2 votes
0 answers
146 views

Converting 3-band raster of a topo map into Unique Values with Colormap or by Reclassifying using ArcMap

I'm using a 1998 USGS topo map for a geologic map base in ArcMap 10.5.1. Right now, the topo raster is in 3-bands with an unsigned 8-bit pixel type. Strictly for cartographic reasons, I need to strip ...
JAKeeley's user avatar
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147 views

Creating Raster Colorizer with ArcPy for ArcGIS Pro

I'm having trouble trying to write the Colorizer code for an NDVI Raster in ArcGIS Pro. The raster is single band, and if I set the discrete colorizer through the Symbology window, I then can access ...
Stew's user avatar
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Are raster color band codes standardized in ArcMap/ArcGIS?

I have multiple TIFF files which contain rainfall data. Different colours are associated with different levels of rainfall. When I add the files to arcgis, a colour/colour code is created. These two ...
jusef's user avatar
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4 votes
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1k views

Do GeoTIFFs support color tables?

I checked the official GeoTIFF documentations and there is no reference to color maps. Regardless, I see color maps or tables referenced everywhere, including in other questions. I am aware that a ...
Andrei's user avatar
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1 answer
3k views

Custom Colormap (cmap) rasterio, Python

I wish to display custom colours for the pixel values in my raster. How can I create a custom colormap (cmap)? In the example below, I have specified "magma" as the colour map. However, I ...
azis511's user avatar
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1 answer
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Cannot count the cell amount

How can I count the colorwise cell amount of a layer file? The attribute table is hidden in the menu. Is there any tool to do that?
Iran Sumanasekara's user avatar
1 vote
1 answer
113 views

'Add Colormap' tool returns nothing in ArcGIS Pro 2.2

In QGIS 3, I created a text file for my symbology. Here it is: symbology.txt # Fichier d'exportation de palette de couleurs généré par QGIS INTERPOLATION:INTERPOLATED 0,0,204,170,255,0 8,0,204,170,...
J.Delannoy's user avatar
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2 answers
402 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 "...
LeMoaiVoyageur's user avatar
1 vote
1 answer
590 views

GDAL Creating color ramp gives "ERROR 1: TIFFSetField:Images/out.tif: Cannot modify tag "PhotometricInterpretation" while writing"

I am receiving a weird error when creating my color ramp using GDAL color options. Here is a working version of my code import numpy as np import os from osgeo import osr, gdal #Load in and format ...
mathwiz97's user avatar
3 votes
1 answer
4k views

python-gdal write a GeoTIFF in colour from a data array

I have a 14400 x 7200 (360 x 180 at .025 deg resolution) numpy array containing data which I want to make into a GeoTIFF. I have done the following which creates a GeoTIFF fine: # Set file vars ...
mathwiz97's user avatar
1 vote
0 answers
36 views

Phenology divergence color map per pixel

My aim is to create a map displaying the start of spring for vegetation which is a set average value, I want for each pixel to know on which date it is actually trespassing this value. So lets say ...
Honigkuchenpferd21's user avatar
1 vote
0 answers
156 views

Retrieving individual pixel height data given color table/relief data and color shaded relief map using C# and GDAL?

I am using C# GDAL/OGR/OSR bindings. I have a GeoTIFF file where each pixel is stored as a color in a Red, Green, and Blue raster band. I have a color table/color relief file (.csv) which I am able to ...
Kyle G's user avatar
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2 votes
0 answers
360 views

Use color map from .tif.aux.xml from ArcGIS in QGIS

I have a raster file (.tif) of different ecosystem types (from natureserve). Each value corresponds to a different type. I'm trying to get a table of those attributes and colors. The file includes (...
bvarick's user avatar
  • 21
0 votes
1 answer
280 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 ...
MM Khan's user avatar
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409 views

Creating color relief from GeoTIFF using gdaldem returns font name

I'm trying to generate a color relief map from a SNODAS greyscale geotiff file scaled from 16-bit to 8-bit. Given the type of data and the scaling, it seems the pixel values are set at 1-5, with 5 ...
alexandersupertramp's user avatar
1 vote
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264 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 ...
Jvg's user avatar
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0 votes
1 answer
2k 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 ...
user1441998's user avatar
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0 answers
557 views

How to include colors in 16bits one band raster

I have many 16bits one band rasters (geotiff), who basically are in greyscale. I had created a style for a color representation with "Singleband pseudocolor" in QGIS and save a qml file. But for my ...
Tim C.'s user avatar
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9 votes
1 answer
2k views

Creating Mosaic Dataset in ArcMap with Colormap as renderer or adding Colormap after creation?

I have several rasters in tiff format that have a colormap assigned to them: I then create a Mosaic Dataset with specs matching the imagery and add all of my tiffs to it (you can ignore the warnings ...
jtgis's user avatar
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1 vote
0 answers
116 views

Set colors in colormap to specific index values

I have multiple pictures with 8 bit indexed colors (0-255). In the end I want some of the colors at specific index values. Black has to be value 0 and white 255. Is there a possibility in ArcGIS to ...
aldec's user avatar
  • 53
5 votes
3 answers
6k views

How to let rasterio use a colormap file when showing a TIFF

I'm new to rasterio. I have tried this example. My raster file is a GeoTIFF file and I have a colormap file available in ESRI *.clr format, with 58 lines. The values in the GeoTIFF file range from ...
Dobedani's user avatar
  • 281
7 votes
2 answers
4k views

Converting ArcGIS raster colormap file (*.clr) to QGIS style file (*.qml)

I have an ArcGIS colormap (*.clr) and I want to open it in QGIS to apply a predefined style. The *.clr file is really simple, only has four columns representing [value] [red] [green] [blue], as this ...
aldo_tapia's user avatar
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0 votes
0 answers
996 views

Correctly display the colors in MATLAB colormap and colorbar?

I am plotting spatial maps with fill values ranging from 0.05 to -0.05 Below is the part of code for plotting colormap and colorbar colormap(brewermap([10],'RdYlBu')); caxis([-0.05 0....
dsbisht's user avatar
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1 vote
1 answer
1k views

Extracting RGB values from symbology of .lyr or polygon file using ArcGIS Desktop?

I have a polygon shapefile of geological units. Someone has already created a symbology and assigned standard colours to the units, available as a .lyr file. What I need to do is create a list of the ...
meguh78's user avatar
  • 41
11 votes
2 answers
2k 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 ...
swiss_knight's user avatar
  • 10.5k
1 vote
0 answers
422 views

ArcGIS colormap is not active?

i have a problem in ArcGIS with colormap. It is not active. I follow the steps written here http://desktop.arcgis.com/en/arcmap/10.3/manage-data/raster-and-images/creating-a-color-map-clr-file.htm, ...
Lusia's user avatar
  • 101
1 vote
1 answer
901 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 ...
beaorn's user avatar
  • 295
3 votes
2 answers
413 views

Colour gradation in ArcMap - shades of blue

I have created a map of the United States with concentric circles around a geographic point, namely Detroit. I was able to give the different circles around the city colours of different grey shading. ...
eigenvector's user avatar
2 votes
1 answer
593 views

QGIS 2.x - 4 colors theorem - TopoColour and Map Coloring plugins [duplicate]

I try to use TopoColour or Map Coloring plugins to color my polygon layer: Both of them doesn't work or I do something wrong. Maybe somebody knows any other plugins which color shapes according to 4 ...
stellatus's user avatar
1 vote
1 answer
63 views

Choosing color classes for comparing differently distributed spatial data

For comparison, I want to draw two maps alongside each other. Both maps should use the same color classes/scale. The problem is that the data for the maps is very different: The data for the first map ...
Funkwecker's user avatar
3 votes
1 answer
760 views

Specifying values in stretched raster histograms of ArcMap?

I am trying to use the stretched color option with a topography raster. I have a color bar that I painstakingly make in arc and I am basically trying to set values of the topography equal to certain ...
color_help's user avatar
3 votes
1 answer
2k views

Style points using color gradients with QGIS

I need to style a shapefile with a specific color gradient, but considering absolute values. It's point shapefile with values between 0.19 and 0.70 (considering they're in an absolute scale between -1 ...
zemigl's user avatar
  • 321
2 votes
1 answer
1k views

Why does my raster layer disappear when changing colors?

When I change the colors of a raster layer (EVI), the layer disappears. Here are my color settings:
dtanon's user avatar
  • 529
2 votes
0 answers
148 views

ArcPy - Force layers to inherit their ColorMap when visualized

I have a large set of GeoTiff's which after manipulating I apply a colormap to the ones I want to visualize with: arcpy.AddColormap_management(raster, "", color_map) I then add them to my ...
Leif's user avatar
  • 21
6 votes
1 answer
5k views

logarithmic color scale

I am using QGIS Essen on Windows 10. I have a data set (.txt file) that contains latitude, longitude, and black carbon (BC) values. I can style the layer using the values of BC - graduated style, ...
honeyace4's user avatar
0 votes
1 answer
3k views

color point shapefile based on cell values

I am using QGIS. After exporting a point shapefile from a raster file, I like to know how can I color the point shapefile with a cell values.
Mahdi.M's user avatar
  • 87
1 vote
0 answers
201 views

Color .xyz files with QGIS

I like to know how can I color a xyz file based on the Z values(elevation) with QGIS, by python or graphicly
Mahdi.M's user avatar
  • 87