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Questions tagged [colortable]

The tag has no usage guidance.

1
vote
1answer
176 views

Get colortable from three-band RGB raster (brick) with R

I have a three band RGB Raster Geotiff. I will provide the sample data below, but I'm guessing my problem should be solvable generically. I would like to turn this three band raster into a single band ...
5
votes
3answers
268 views

Display data-defined vector layer styling in the map legend?

I have styled a polygon shapefile with hexadecimal colours from a field (it's a geology layer and the colours are those used by the BC provincial gov't). The layer looks great, but the data-defined ...
7
votes
2answers
527 views

how to preserve color-interpretation when merging TIFFs and adding alpha band

We have a collection of black-and-white map tiles as *.tif images with accompanying *.tfw files, that we'd like to merge into one single large map and cut with a polygon (turning the area outside the ...
2
votes
1answer
465 views

Export GeoTIFF with color table from web service using gdal_translate

The gdal_translate program has an option to define an XML file with the necessary information to download an image using various web map server specifications. I am trying to download a file that ...
1
vote
1answer
220 views

How to make colour tables in QGIS to use in multiple projects?

I would like to know how to make a colour table that can be saved and used across many projects. I am using this to colour rock types, for example: Rock one=blue Rock two= yellow Rock three= red etc. ...
2
votes
1answer
1k views

Sort colors from light red to dark red

I have the following png image displaying tanker traffic density: The colors are from dark red to light red, dark red means 'lowest density' and light red means 'highest density'. For example, the ...
8
votes
1answer
12k views

How to add a color table to a one band tiff using GDAL?

I have 1-band GeoTIFF file. The color interpretation for band is gray. I want a color table in order to transform my Col.tiff to Col.jpeg or Col.png. I tried putting a color table in this tiff via a ....
0
votes
0answers
95 views

Tool to save own color table with CMYK, GRB and HSL

Im looking for a tool to save my colors with CMYK, RGB and HSL. So that I can print and compare, write some notes to every color and easy extract. Any idea? Im mainly using Inkscape, Gimp and QGIS ...
2
votes
2answers
8k views

Multi-Band (RGBA) into single band raster

I have the raster which contains 4 bands (RGBA), which ilustrates the pupulation (traffic) density. I want to convert it to the simple gridded ascii, however I'm getting in the trouble when I try the ...
4
votes
0answers
600 views

How to create raster attribute table to a raster data using gdal python?

I classified a remote sensing data and saved it as a raster using Gdal python. I want to create a raster attribute table for this classified result.. my classified raster has five classes with 1,2,3,4,...
5
votes
1answer
1k views

Transform RGB-Map to CMYK (qgis, opensource tools)

I want to print a map I made with qgis. For the print I need CMYK-colors but the print-composers pdf-output is RGB. How can I convert the RGB-map/-pdf to CMYK?
1
vote
0answers
375 views

Applying colormap to grayscale tiff image using java

I have a gray scale tiff image.Now i want to add some pseudo colors i.e for pixels whose DN from 0-140, red color;DN from 141-255 ,blue color.Please tell me how to modify the raster table.Otherwise if ...
7
votes
4answers
5k views

Installing 1-band color raster color table?

I would like to use the "1-band raster colour table" extension. I'm using QGIS Wroclaw 1.7.4. In the plugin installer I can't find this extension, even I quote for third party extensions thing. Does ...
2
votes
1answer
311 views

hypsometric colors alà IMHOF, SYDOW or PEUCKNER

I need a hypsometric color-map to add it to my multishade-model. (High Mountain between 800 and 4000m) There are a lot of different types explained in IMHOFS "Cartographic Relief Presentation". I want ...
5
votes
1answer
960 views

Creating color tables for floating point raster maps in GDAL?

I've got a script that dumps a floating point raster that I'd like to automatically color. Currently I load this raster in ArcGIS Desktop or QGIS and manually create a color table every time I re-run ...
3
votes
1answer
506 views

Standard Colors for Landcover Maps

I have classified Landsat images into five classes - A variety of Palm, Water bodies, built-up/open area, other vegetation and miscellaneous. I used GRASS GIS for the process and the final classified ...
1
vote
1answer
529 views

How to use r.patch with two maps having different colortables?

I am using r.patch to combine two raster maps in order to fill in the null values of the other. Is there a way to use r.patch but still maintaining the colortables of the separate raster maps? I do ...