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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3
votes
1answer
681 views

How to change the color of a selected feature with pyQGIS?

is it possible to change the color of a selected feature in qgis 1.8? To highlight a feature I use: vlayer.setSelectedFeatures(selectedList) box = vlayer.boundingBoxOfSelected() qgis.utils.iface....
3
votes
1answer
111 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
545 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 ...
3
votes
0answers
39 views

Style rule based on feature adjacency?

Is there a way in QGIS to use an expression to define a polygon feature's color based on whether it's adjacent to other features? I would like to achieve something like the following: -If a feature ...
3
votes
0answers
92 views

Assigning different colors to different parts of text in labels using QGIS?

I'm using QGIS 2.14.3. It is now possible to assign different colors (or fonts) to different parts of text in one label (I have seen How to make a different font and color of text in labels? )? If so,...
3
votes
0answers
56 views

Changing colours in SVG symbol using QGIS?

I am using QGIS version 2.14.1 (Essen), and I have imported a traffic cone symbol in SVG format to represent some of my data. I was wondering if it was possible to change the color of this symbol ...
3
votes
0answers
166 views

PyQGIS: How to color raster layer with existing colorBrewerMap

With pyqgis I have added multiple new raster layers to the legendinterface(). Because i like the ColorBrewer style i want to color some of them with the "Spectral" gradient. How can I do this in ...
3
votes
0answers
306 views

How to Export/Print/Save CMYK colored map to SVG, PDF, or PRN/EPS file

I am a beginner using QGIS 2.0.1 on Windows. Following Data-defined Styles in QGIS I fill CMYK values on my map layers, but I cannot Export/Print/Save CMYK to SVG, PDF, or PRN/EPS file. I see only ...
2
votes
2answers
691 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
3k 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
188 views

Getting currentfeature's color in Expression Builder of QGIS?

In QGIS Expression builder. I want to obtain the color code of the current feature. I mean: My layer contains lines, each one is painted with a different color. Now I want to assign that color to ...
2
votes
2answers
1k 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, 4000-...
2
votes
2answers
3k 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
1answer
156 views

How to transfer saved colors from computer to computer?

I have a ton of colors saved on the color palette and I was wondering how to transfer this color palette from a machine using QGIS 1.10 to a machine using QGIS 1.12.
2
votes
2answers
91 views

Regarding Landsat 8 QA image color

As par the USGS page explaining the 8 bit quality image in following link: http://landsat.usgs.gov/LandsatLookImages.php Water is represented by bit 3 [Translated to color range (8 -15)] and Snow/ ...
2
votes
2answers
2k views

Changing color of raster images based on their data values - gdal

Let's say I have 1 band raster images with Gray Color Interpretation and I want to change their color based on their data values. Data values -1, will be Blue, -0.5 will be Light Blue, 0 will be ...
2
votes
2answers
38 views

Colouring three individual attributes in point layer using QGIS?

I am new to QGIS and am learning the expressions function. I would like to know how to independently colour three separate attributes on a point layer as below:
2
votes
2answers
601 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
249 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
1answer
536 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 ...
2
votes
2answers
172 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
4k views

Quickly changing outline color of polygon in ArcGIS Desktop without opening Symbol Selector?

In ArcGIS Desktop 10, I know it's possible to quick change the fill color of a polygon by right-clicking the symbol box of any layer and just pick a simple fill color. Is there a way to change the ...
2
votes
2answers
780 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
53 views

QGIS: How to modify the appearence of selected attributes [duplicate]

I am using QGIS version 2.14.1 (Essen). When I open the attributes table of a layer, I select some data which is then highlighted in yellow on the map. I was wondering if it is possible to change the ...
2
votes
3answers
70 views

Editing Road Style/Color from ArcGIS Maps and Data Group

I have ArcMap 10.2 on a Windows 10 pc. I uploaded this open source layer into my desktop map, but I can't edit the look of the streets or color from the table of contents. Is there a way to do this, ...
2
votes
1answer
54 views

How does ArcGIS Pro 1.0 choose default color for first layer added to Map?

When I add my first vector dataset to the Map in an ArcGIS Pro 1.0 project that I created using the Map.aptx project template, it always comes in using a gaudy brown color like in the graphic below. ...
2
votes
1answer
344 views

Setting fill colors using hex value in ArcGIS Online (arcgis.com) webmap?

Has anybody been able to use hex values (e.g. #FF0000) for setting polygon fill symbols in an ArcGIS Online (arcgis.com) 'webmap'? I see predefined colors to select from, but no hex input box.
2
votes
1answer
598 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
3answers
649 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
625 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
2answers
29 views

Creating a palette for categorized data displays

I regularly categorize data as follows: Prehistoric = blue Roman = red Anglo-saxon = green Medieval = yellow Post-medieval = brown Modern = grey Undated = white Is there any way to save this palette ...
2
votes
1answer
38 views

Displaying colored traces and waypoints

Goal: display map with few routes, which have colored segments. Also displays few waypoints with text + gives option to download few gpx routes and additional text. I see that gpx format has ...
2
votes
1answer
132 views

pyQGIS changing Paletted Raster Layers to Grayscale

I've written a plugin which imports a number of colour geoTifs (map tiles) and works correctly but it would be great to display these as Grayscale after loading in. The geoTifs load as paletted ...
2
votes
2answers
346 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
1answer
98 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
369 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
0answers
45 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 ...
2
votes
0answers
27 views

Black map after attempt to style by column in QGIS [closed]

I'm very new to QGIS and I'd really appreciate some guidance. I have a shapefile of NYC census tracts and 2 csv info files with tract info joined with it. I'm trying to style the individual tracts to ...
2
votes
1answer
1k views

Arcgis API for Javascript: how to change color of simple point marker using colorpicker

as title states im having a hard time changing the color of my simplemarkersymbol using javascript. I have read that the format of color needs to be [r, g, b, a] which I have a color picker giving me ...
2
votes
0answers
132 views

How to optimize color ramp for terrain

I'm working on a project to highlight LiDAR terrain on the web and part of the idea is to show the detail of the data at large scales. I've already read through the excellent Mapbox guide and I've got ...
2
votes
3answers
1k 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 ...
2
votes
0answers
161 views

Adding colours from .style file to multiple shapefiles via script? [closed]

I have added 70 fill colours in a .style file. For adding these colours to my shapefile i would have to manually go to properties/symbology/match to symbols in a style/ then browse to the location ...
1
vote
2answers
2k 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
1answer
112 views

Change the ArcMap background from white to blue (i.e the sea)

Say I have an image like the map below, how can I change the white to blue, to represent that this is the ocean? It is not part of the shape file itself, so I cannot use symbology.
1
vote
2answers
377 views

how to color polygons with random color in QGIS

I have a map with a large number of polygons that I want to colour individually for display purposes. There is not particular pattern required, only to present them as individual catchments in a ...
1
vote
1answer
50 views

Why are color settings 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
2answers
253 views

Adjust Color Theme of CartoDB Basemap “Dark Matter”?

I wanted to know - but haven't found the solution elsewhere - whether it is possible to adjust the color theme of the CartoDB basemap "Dark Matter". I'd only like to change the colors of the water ...
1
vote
1answer
357 views

A nice display of hillshade and my geologic map

i want to create a nice hillshade map covered by a grid or RGB map, with similar colour results in ArcMap like this: Is there a way to achieve this in ArcGis without transparency settings which ...
1
vote
2answers
331 views

Worsened image quality and false colours after georeferencing

When I georeference a map of vegetation types (about 20 colours, each representing a certain vegetation) the quality of the georeferenced map is really bad and some colours have changed (e.g. black ...
1
vote
4answers
209 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 ...