The property possessed by an object of producing different sensations on the eye as a result of the way it reflects or emits light

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16
votes
4answers
6k views

What is the best colour-ramp to use for elevation?

This is maybe rather subjective as it concerns style, but I would like to have a few decent colour ramps for my DEM when it is layed over my hill-shading. I have created the Swiss hillshade model as ...
11
votes
7answers
2k views

Color palette conventions

I wonder if there is a "unified" source for map color conventions, that GIS map builders are encouraged to follow? EDIT To clear up my question a bit. I'm more interested in the color <-with ...
10
votes
6answers
853 views

Are there any convenient sources of color palettes to use in ArcGIS software while producing maps?

Since it was asked in Beta and I want to know the answer, I post it here.
9
votes
7answers
877 views

How to automatically set polygons borders to improve map readability when rendering thematic maps?

When mapping an value as a color to render a thematic map the objects borders can alter the map readability a lot. For example in this thematic map of the US counties with black borders: There are a ...
8
votes
5answers
3k views

How to use ColorBrewer in ArcGIS 10?

I've been using ColorTool (based on supreme ColorBrewer) for most of my mapping needs in ArcMap. After migrating to ArcGIS 10 I discovered that it will no longer be a case. Are there any other ...
8
votes
3answers
451 views

How to apply the four colors theorem in a polygon map in ArcGIS/ArcToolBox automatcally?

I need to apply the four colors theorem in a polygonal shape in a way that I do not need to choose manually each color to put in each region. I wish to knows if there is any extension, plug-in, script ...
6
votes
1answer
565 views

How to modify the colors of a raster map to use only one color in varying shades?

I have a raster map in GRASS containing elevation values. I want to display the elevation values in only one color (specificaly blue) but in varying shades of blue. I tried the options in r.colors, ...
6
votes
2answers
3k views

How to change DEM's gradient colour?

I'm a newbie about GIS. I'm from Italy and I've got a *.tif file of my region. I've loaded it has raster but I have a question: The dem has a gradient colour magenta. How change this colour to ...
5
votes
1answer
255 views

phong lighting scheme in arcmap?

I have seen a few DEM/hillshades in published journal articles that use a phong lighting scheme which gives surfaces a metallic luster. Does anyone know how/if this can be achieved in arcmap?
5
votes
1answer
185 views

How to convert ArcMap color ramps to QGIS?

I have both ArcGIS 10.0 and QGIS 2.0 How can I reproduce a specific ArcGIS color ramp in QGIS? If possible, I would like to simply convert the Esri *.style file but perhaps there is another ...
4
votes
2answers
3k views

How to give multiple colors to features within a single shapefile?

I want to give multiple colors to different features within a shapefile based on attribute values , is this possible in QGIS ? If yes what is the procedure ? Is there a way to provide color by means ...
4
votes
4answers
864 views

Halo use background color

As you see on the attached image, I labeled contour lines on the map (in meter). Which function will allow the "halo" to take the background color of the map? On the image, the halo is greenish which ...
4
votes
2answers
3k views

How to create a color ramp in ArcGIS10 where the zero value is represented by white?

I have a simple problem which (to me) seems to be difficult to solve in ArcGIS. The map I plot is a GeoTIFF with emission data. I use a default algorithmic color ramp (rainbow) to do so. Now I would ...
4
votes
2answers
196 views

How to create a colormap where colors diverge at value 0 in QGIS?

I calculated a raster as difference of two other rasters. Now I want to create a colormap where one colour represents negative values and one colour positive ones. The two colours should become ...
4
votes
1answer
356 views

Recoloring geotiff for visual presentation

I have a rather big Geotiff. It is the mosaic of four RapidEye satellite images. They are all a bit bland/grayish. When combined I would like to freshen up their colors so that they are more visually ...
3
votes
3answers
2k views

Make selected polygon a different color without covering everything

Working in ArcGIS 9.3 I'm selecting polygons by attributes and trying to have the selection show up as a light yellow. I set the selection color to the light yellow and it's the 'lowest/last' layer ...
3
votes
1answer
243 views

Labels with white (or other color) background

I tried to give my labels somekind of box and a backgroundcolor (or boxcolor) in QGIS, but i couldnt find the right option. My labels are not readable because my layers are too dark. I found offset ...
3
votes
2answers
564 views

How can I apply stretch in ArcGIS 10 Image Analysis Window?

I need to apply stretch to ArcGIS 10.1 exported raster. The best way to accomplish this task: Image Analysis Window, because there are fine tools to equalize raster data. 1 - This is my IRS-P6 24m ...
3
votes
2answers
817 views

ImageMagick's convert program changes PNG file format so that color/alpha info doesn't survive GDAL

It appears that ImageMagick's convert program changes something in my PNG file that causes GDAL processing to mess up the color and/or transparency bands. My original PNG file gets processed ...
3
votes
1answer
353 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 ...
3
votes
1answer
65 views

What defines a Class in the Heat map plugin?

What defines a Class in the Heat map plugin? As in: "Black holes like that are usually caused by raster values exceeding the range of the color ramp. Try adding another class with a higher associated ...
3
votes
1answer
341 views

color gradient (or color ramp) in Arcgis and Qgis

I am currently working on my thesis and I would like to ask you: does anybody know the mathematical formula that calculates the color gradient in Arcgis and Qgis? In other words, which mathematical ...
2
votes
2answers
184 views

How to save colour (color) ramps in QGIS

This strikes me that it should be simple, but efforts in QGIS and research here and elsewhere are not providing a solution. I have a (vector) map which I have to mark out in colours according to the ...
2
votes
2answers
1k views

How to create a map with states by attribute value?

I'm using Qgis, but I am quite familiar with R and python. So I could use any of these. I want a map of mexico but want to color the stats according to a certain variable. It goes from 0 to 100. So ...
2
votes
2answers
921 views

How do I use ranges for raster colour map in QGIS

I have a raster layer in GeoTIFF format, with continuous data values between -1 and +1. For the colour map, I would like... >0 to be green = 0 to be grey <0 to -0.25 to be pink <-0.25 to ...
2
votes
2answers
2k views

Looking for a colormap for SRTM like OCM Landscape

In Quantum GIS there's an OpenLayers plugin. I would very much like to use the same colormap/scheme/theme used in the OCM Landscape layer and apply it to SRTM image I have. I checked the the open ...
2
votes
2answers
124 views

How to programmatically change raster symbology after reclassification?

I have created a code in Python that I will use for a custom tool in ArcGIS, the code will create a Eucledian Distance of 6000m around a point and Reclassify the distance from 0-2000, 2000-4000, ...
2
votes
2answers
216 views

Website, tool or app to produce colored map of the United States?

Does anyone know of a website, Windows program or iOS app that has a clickable map of the United States and colors in the states that are clicked on? Looking to produce a map of states I have visited ...
2
votes
1answer
194 views

How can I apply correct colours to an elevation raster?

I have a problem to display elevation data with pseudocolours. The channel 1 is from -3.40282e+38 to 149.717 . A colleague used 1.7. and it looks like it should (from blue to Red) when I use QGis 1.8 ...
2
votes
2answers
105 views

Is there any systematic way to pick two colors for a chloropleth showing a candidate's margin of victory

I have a simple 2-color map showing which candidates won in which precinct. Now I want to make one showing margin of victory within a precinct. So if candidate A won by a lot it would be dark green, ...
2
votes
2answers
439 views

How do I create a negative to positive value raster with neutral 0?

I have a raster layer with a band with values from -137 to 9229. I want to create a color scheme showing how far from 0 the positive numbers are in one color, and how far from zero the negative ...
2
votes
1answer
226 views

gdal_translate produces tif with different colors as original

I am using SDE as my raster data source with the ultimate goal to tile this dataset: I am running the following gdal_translate command to generate the initial VRT: gdal_translate -projwin 390605 ...
2
votes
2answers
415 views

How to change the color of a vector layer in pyQGIS?

Is it possible to change the color while adding a vector layer? I have a vecot layer with water areas and want to load it with a blue color. The layer is added with: ...
2
votes
1answer
276 views

Special background layer not coloring in Kartograph map

I'm testing out Kartograph according to the documentation and a linked gist. Both my US and non-US layers color correctly, but I can not get the special "sea" layer to fill. I found an example here ...
2
votes
1answer
235 views

How to keep (complex) color table when exporting from GRASS

I understand how to work with color tables within GRASS - but is there any way to preserve color tables when opening the raster in a different program? For example, I created a color table in GRASS ...
2
votes
2answers
157 views

Convert ASCII Grid Colorized to Raster

I have an ASCII Grid file + .prj file and can visualize this in qGIS. I can colorize it by going to properties and using a Pseudocolor Ramp. However, I want to export this now as a TIFF / Raster. ...
2
votes
2answers
235 views

How to add an image to an existing data frame using Python?

This is the first time I am using Python on my own, and I have searched for this answer for a few hours with no luck. I am wanting to take a .JPG image and put it in a data frame. The image has to ...
2
votes
1answer
78 views

Change text color of PopupMobile

I am facing the problem that with some mobile Browsers like DolphinHD and Android Browser that the browser makes the text color white, and the background is also white. So i want to change the ...
2
votes
1answer
183 views

automate color palette generation?

I frequently am in need of color gradients that aren't readily available through ArcGIS or the ColorBrewer add-in. I find the process of manually creating gradients in Arc very tedious: saved custom ...
2
votes
3answers
699 views

how to change color of feature to mark it as recently modified with openlayers

I am developing a crowd sourced app using openlayers. after user clicks an feature, a popup form is displayed. After clicking the save button, the data is used in processing which takes some time so ...
1
vote
2answers
823 views

How to style a shapefile in GeoServer?

I have a shapefile data of buildings. I added it to GeoServer and serve it as a WMS layer. When I check my own maps in the browser my polygons of building appear black color and I want to change it's ...
1
vote
2answers
47 views

In ArcMap 10.2, exporting raster as .tif with “use renderer” and “force RGB” still produces inaccurate colors

I have a DEM and my aim is to change its color ramp using ArcMap, then export this colored raster as a geotiff (8 bit). I checked "use renderer" and "force RGB" options but the results are not good ...
1
vote
1answer
38 views

Why are color settings are not saved when exporting to a new file?

I extracted with QGIS a municipality from a state map, then divided it with a grid. I don't want the borders of the grid features to be seen so I changed the color of the map and the color of the ...
1
vote
4answers
128 views

Batch visualization of raster (grid) files

I have about 100 raster (grid) files (in the "ascii grid" format) of drought index. All cover the same area of interest but at different times of year. I need to create images from the grids with ...
1
vote
2answers
1k views

Is there a way to quick change the outline color of a polygon in ArcGIS 10 without open the “Symbol Selector” window?

Sei que é possível alterar a cor de um preenchimento clicando com o botão direito na caixa do símbolo de qualquer layer e aí basta escolher uma com simples. Tem como alterar o contorno do polígono ...
1
vote
1answer
186 views

hypsometric colors alà IMHOF, SYDOW or PEUCKNER

I need a hypsometric color-map to add it to my multishade-modell. (High Mountain between 800 and 4000m) There are a lot of differend typs explained in IMHOFS "Cartographic Relief Presentation". I want ...
1
vote
2answers
66 views

Retrieve Elevation from Color in Raster DEM

This might turn out to be a newbie question, and that would be because I'm fairly new to GIS work, but extensive online searching, asking associates with some basic GIS knowledge and hours in various ...
1
vote
1answer
229 views

How to get custom color palette in rasterVis plot3D in R?

I am trying to insert an RColorBrewer palette to visualize an elevation raster in R using the rasterVis function plot3D. The rasterVis reference document shows the following parameters: plot3D(x, ...
1
vote
1answer
56 views

How to symbolize a large amount of points with lots of color

I have an interactive map with a very large amount of different points. Depending on user selection, various points are shown or not-shown. These points are divided into several categories, each ...
1
vote
2answers
136 views

Is it possible to import SAGA colour styles in QGIS?

iam still using QGIS and SAGA independently in my productive use (despite the excellent SEXTANTE toolbox, which is sometimes a little buggy). SAGA has some very nice default styles and i am wondering ...