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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1answer
29 views

How do I color XY coordinates with different colors in ArcGIS for Desktop?

I have added XY coordinates on map layers in ArcMap. These coordinates now show up as points. However, I want to be able to color each coordinate point a different color. Any tips/explanation?
1
vote
1answer
25 views

What is the color standard for roads or Transportation for USA?

Are there color standards for US Transportation roads such as Interstate, County,, Interstate, local, private, state highway and other roads out there ?
0
votes
0answers
9 views

QGIS colors not rendered accurately

After installing 2.10.1-Pisa, a very annoying problem suddenly appeared. As you can see, colors in the left sidebar are not rendered correctly in the main window (nor in the print manager). Instead, ...
3
votes
1answer
50 views

How to change a Esri Scale Bar's font color

I'm working on my first ESRI web map project. In the Default.Aspx page the scale bar is initiated as shown below : dojo.require("esri.dijit.Scalebar"); map.on('load', function () { //resize ...
0
votes
2answers
19 views

Changing Layer Color

I have a map with many feature classes on it. I want to use arcobjects to get to a selected layer (aka one of the feature classes) on the map, and change the fill color of all the polygons within that ...
0
votes
0answers
19 views

redraw canvas when add new overlay?

Good day! A little problem: how to redraw canvas when I add overlay layer? Firstly load osm map, then creates canvas. So when I push the botton and add another layer it looks like sandwich and canvas ...
1
vote
1answer
18 views

Mapping continuous vector data on a continuous colour gradient in ArcMAP 10

I'm plotting vector data for different attributes for countries across Europe. I've used symbology to plot categories of countries. However, the data are numbers so are on a continuous scale. I would ...
2
votes
1answer
58 views

pyQGIS changing Paletted Raster Layers to Grayscale

I've written a plugin which essentially imports a number of colour geoTifs (map tiles) which works correctly but it would be great to display these as Grayscale after loading in. The geoTifs load as ...
2
votes
3answers
30 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, ...
0
votes
1answer
34 views

Importing TIF raster in QGIS, default color band

Where can I change the default color bands for importing raster images? When I import a TIF image the green color band is not set causing a purplish image. When I set it in the properties it views ...
1
vote
1answer
29 views

symbology with 2 fields - one for the color and another for the shape?

for example, i have two fields: 1 - a, b, c 2 - X, Y, Z and i want to do like this: a - square, b - circle, c - point X - blue, Y - red, Z - pink and when i have a and Y - it whould be red square.
1
vote
1answer
35 views

QGIS get currentfeature's color in the Expresions Builder

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 ...
0
votes
1answer
46 views

Change color of feature (active cursor row) with ArcPy

I have a selection of polygon feature and with a cursor loop I walk through them. I determine the extent of eachfeature and arcmap will zoom to the feature. My default selection color in ArcMap is ...
2
votes
1answer
37 views

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

When I add my first vector dataset to the Map in an ArcGIS Pro project that I created using Map.aptx, it always comes in using a gaudy brown color like in the graphic below. Doing the "equivalent" ...
1
vote
0answers
47 views

Convert manual colored maps to vector

Is there a way to colorimetrically and automatically vectorize georeferenced rasters that came from manually colored, scanned maps? Currently we Print the topography maps 20k scale --> hand-coloring ...
0
votes
0answers
38 views

Modifiable SVG fill color, stroke and stroke width

I have a lot of custom svg files made in Inkspace. I need to be able to change their fill color / stroke color / stroke width using QGIS. I have found a similar topic, however the solution mentioned ...
1
vote
2answers
52 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 ...
0
votes
0answers
34 views

draw coloured LINESTRING over map [.NET (C#) if possible]

I need to render linestring on the map (possibly OSM map) where each pixel (or at least segment) has assigned custom color. In my linestring, each point defining the line has also color definition. ...
0
votes
0answers
25 views

Different colors of rasters after loading back to QGIS

I am experiencing this issue longer time but sometimes it is really annoying so I would like to solve it. When I save an image from QGIS - no matter when using Project/Save as image or using Export ...
1
vote
0answers
71 views

Convert grey,green,blue to red,green,blue tiff

==== Edit ===== Issue tracked to strange behaviour of gdal_warp when -dstalpha is specified and source is RGBA. I had assumed that the grey,green,blue tiffs (see example below) were genuine and ...
2
votes
0answers
22 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 ...
7
votes
4answers
195 views

Colour coding by day - any conventions?

I'm working on a map showing on which days garbage is collected in different areas. That means it's pretty tempting to colour code each zone with a different colour representing a day of the week. ...
1
vote
1answer
116 views

legend colour with specific value

i have model plotted in R base<- raster("example.tif") plot(base) image i'd like to change value (0,5,10,15,20,25) breakpoints<-c("0,5,10,15,20,25") plot(base,break=breakpoints) Error in ...
0
votes
0answers
54 views

Using the phase 1 habitat styles?

I am utilising the phase 1 habitat styles and wanted to show 'mixed scattered trees' which is essentially a layer with two different types of green dot. I cannot figure out how to do this and also ...
1
vote
2answers
103 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 ...
0
votes
0answers
16 views

Changing color of multispectral Raster Image using PostgreSQL/PostGIS query

Would like to change the color of a multispectral Raster Image. looking for changing band rendering values for Red, green and Blue bands using PostgreSQL/PostGIS query. I have loaded the raster ...
0
votes
0answers
49 views

Google Earth/KML colors of polygons darken when extruded

I'm playing around with KML, trying to create a multivariate map with a choropleth based on one variable and extrusion/perspective height based on another. Here is an example of a Google Earth image ...
1
vote
1answer
69 views

How to change the color of a specific feature(s) with a PyQGIS script

First of all im a big noob so don't hate. So image that the lines that i have drawn is simple pipeline network, represented by some simple lines in a vector layer. Now the question is, how can i ...
1
vote
0answers
28 views

What can POLYCOLOR mean and is there a way to convert to RGB?

It is not for the first time I found in the tables of some data column called POLYCOLOR. Is there any way to figure out what that means and is it somehow convertible to RGB values? If I get it right ...
1
vote
1answer
120 views

How to change color of a layer in openlayers?

http://www.cv.nctu.edu.tw/shapefile-js-openlayers/ol_simple.html this is my website for test. I add two layers in openlayers. And I want to change color in one of two layers. var myStyle = new ...
0
votes
1answer
97 views

How to make dark gray background on TIF image transparent or white in QGIS [duplicate]

see also: Imported TIF has dark gray background instead of white That question addresses why the TIF imported into QGIS has a dark gray background when the color set is set to 4096 when exported from ...
1
vote
1answer
42 views

Import file format with colors

I am very new to QGIS, so please excuse me if my question seems stupid to you. I have a small question regarding setting manually colors for points and lines. I have a bunch of nodes and vertices to ...
1
vote
1answer
438 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 ...
0
votes
2answers
163 views

Displaying polylines in different color / Color gradient

Though i am using QGIS, yet I am not confined by tool (can use an entirely different tool or a plugin for QGIS) usage.. Only aim is to get the following: I am reading various shapefiles in QGIS and I ...
0
votes
0answers
118 views

QGIS raster symbology problem in 2.6

With the new 2.6 QGIS version I often have problems with raster colors. For some reason certain pixels do not display initially, but if I move the raster a little spatially they show up.
0
votes
1answer
227 views

GeoServer SLD: fill a polygon with color sampled from gradient

I have a "geometry" and a "rating" column. I want to symbolize the geometries in an SLD (PolygonSymbolizer) but fill it with a color value that is interpolated between BLUE-PURPLE-RED based on the ...
2
votes
1answer
551 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 ...
4
votes
1answer
288 views

How do I combine bands in a tiff then convert to grayscale?

I have a large mosaic of tiffs in which I need to do the following: -Combine bands 4,3,2, for an infrared image then convert the image to grayscale without producing another dataset -This is easy on ...
2
votes
1answer
238 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 ...
4
votes
1answer
128 views

How to create a map colored by distance to nearest point in R

I'm new to GIS and R-- hope this question makes sense. I have a dataframe(geo07) containing two variables that record the long/lat values for about 6000 points (mat_long & mat_lat). These ...
1
vote
0answers
57 views

Inverting color ramp in legend

I have inverted the color ramp to display land surface elevation, now when I add a legend in print composer it shows the lowest value at the top and the highest at the bottom. See below: It is more ...
2
votes
2answers
397 views

How to match colours in already mosaiced single image?

I have an already mosaiced image for a large area. I need to match colours in this single image. I do not have each image separately. I just have this large single image downloaded from GLS. How can I ...
1
vote
1answer
109 views

Coloring polygon based on date using TileMill/CartoDB?

How would you color a polygon/line/dot based on a date? The colors would be a pre-set list. I need the area to update its color based on the current (or given) date. I would be using tilemill or ...
3
votes
0answers
504 views

Can I export the RGB values from an ArcGIS layer symbology?

I've got a point layer in ArcGIS that has 100 specific color codes based on the name of the store. I'm trying to export the RGB values for these colors (along with the name value it's tied to) so I ...
1
vote
0answers
116 views

How to change color of points dynamically from a geoJson in openlayers

I am new in Openlayers and what I am trying to do is to dynamical give a color to some points read by a GeoJSON file. I am taking inspiration by this post How can I add an infowindow to an ...
3
votes
1answer
84 views

How to change the color of vector layer of QGIS in api?

I'm using QGIS-2.4.0 api to develop app in C++. When I add a vector layer to the app, the vector map's color would be random. I used QgsFeatureRendererV2 to get the geometry type of the layer, my ...
1
vote
1answer
161 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 ...
5
votes
1answer
492 views

Why do CMYK colours in ArcMap not match those in Adobe products?

I'm creating a map in ArcMap, based on a style guide which specifies colours in CMYK notation. So I've set the colours in ArcMap's color selector. The layer has no transparency set, and is the only ...
1
vote
0answers
65 views

Postgis Raster Unions Color Issues

Can someone explain to me what I am doing wrong here as I think I do not properly understand postgis raster bands. I have a set of geometries that I want to merge with a raster and created a raster ...
1
vote
0answers
48 views

Legend won't print in color [closed]

I am using ArcMap 10.1 and my legend will not print in color. Please help. I have a layer with points and symbols that show up in color on the map but not in the legend, what should I do?