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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4
votes
1answer
679 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 ...
1
vote
1answer
36 views

Display selected features with same point geometry

I have a point layer and some features have exactly the same geometry. When I make a selection it seems that some features are not selected because they do not display with the "Selection color" as ...
2
votes
3answers
627 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 ...
3
votes
0answers
86 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,...
2
votes
1answer
128 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 ...
0
votes
0answers
132 views

redraw canvas when add new overlay?

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 in a middle...first layer - ...
1
vote
0answers
17 views

QGIS how obtain multicolour lines from polygon cell grid multicolour

In QGIS I have different lines with same colour that pass through a grid polygon cell (each cell of the grid have a colour). When a line cross a cell, it must colour with the relative cell colour. ...
5
votes
6answers
3k views

How to pansharpen LANDSAT 8 in GRASS?

Having used QGIS for quite some time for mapping, I was 'forced' to dig into GRASS as pansharpening is not directly executable in QGIS. After understanding more or less the structure, I did some ...
6
votes
5answers
206 views

Color ramp resources other than Color Brewer?

I am looking for more resources on color theory in cartography. When to de-saturate a color? Or if you start with one color, how do you create a ramp from it? RGB or HSV? I can hack at it and come up ...
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
44 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
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 ...
0
votes
0answers
36 views

OpenLayer WMS Polygon Fill color dynamically

i am new to OpenLayer Geoserver and PostGIS. I want to color my WMS Polygon Layer which has multiple polygon in different color based on some value. Is this possible with wms or wfs. Color for polygon ...
-3
votes
1answer
57 views

How to colour a SpatialLinesDataFrame with Rainbow

how to color a SpatialLinesDataFrame according to some given value (Rainbow) FRA=readShapePoly("FRA_adm0.shp") grid <- raster(extent(FRA)) # Choose its resolution. I will use 2 degrees of latitude ...
3
votes
0answers
47 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
1answer
106 views

QGIS 2.10- symbology - Using BOTH size and colour to represent 2 pieces of information on single point

I want the colour of the point to represent value from data column x (eg. rating from 1-5) and SIMULTANEOUSLY the size of the point to represent value from data column y (eg. Number of ratings 0-600). ...
1
vote
1answer
46 views

Geonetwork style customization

When i launch Geonetwork, all changes in files of style(geonetwork.css, gn_search_less, gn_view.less,...) are lost, and the system generate a new file /static/gn_search_default.css. How can I ...
3
votes
1answer
57 views

Polygon made by colour difference

I need to analyze differences (historical) in coverage of some species (seagrass Posidonia). Although its a marine species, subject area is very shallow and even from common satellite and aerial ...
1
vote
0answers
12 views

Export color corrected rasters from a catalog in arcmap

I have several raster in a raster catalog for which I(ve used color correction. I'de like to export each raster as a geotiff with exactly the same resolution and world file than the original geotiff ...
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 ...
1
vote
0answers
50 views

How to make water transparent on openstreemap-carto style?

I have build up manually a tile server on Ubuntu 14.04. LTS, by following switch2osm's guide and have used the openstreetmap-carto style. Now I intend to add a base layer, underneath the current one,...
9
votes
3answers
13k 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 ...
0
votes
1answer
227 views

NHD Flowline legend colors?

Does Anyone have legend colors for the NHD Flowline that USGS sets colors for theirs ? I'd like to get a copy of their color legend. They can be from their website, brouchure, lyr files or ...
0
votes
1answer
89 views

ArcPy - Symbology Color Changes After Setting Class Break Values

I develop a python script tool to adapt the symbology of a set of shapefiles based on a given symbology template (layer file). These are the properties that should be changed: Number of classes and ...
1
vote
1answer
84 views

Color gradients to show direction in polylines

I am referring to this very useful hack to change the color gradient of buffered polygons in order to show direction (with a gradient from red to green, for example) hack The only problem is that ...
0
votes
1answer
35 views

How to control polygon colour in hand-crafted Json for ArcGIS Desktop 10.3/10.4?

An app I'm developing needs to handcraft ESRI JSON to display simple polygons in ArcMap Desktop upon import. I want to specify color/transparency/outlining for the polygons in a layer and ideally ...
3
votes
2answers
92 views

How to find a object in by name in the properties? [duplicate]

I would like to change the color of one object in the shapefile. I have done it with every object of interest and it worked so far. But this one I can’t find by name in the properties. Is it possible ...
0
votes
1answer
104 views

Mapserver label background colour

I'm a totally newbie in Mapserver. I'm using mapserver 6.0.3. I have managed to label some lines but I cannot create a background colour for the labels. Using QGIS 2.10 I got something near to what ...
4
votes
0answers
31 views

Create polygon symbology from attribute? [duplicate]

I have shape file with polygons and lines. There are attributes for: layer, lineweight, colour: Red, colour: Green, colour: Blue. (colour values are from 0-255) Is there a way to read values from ...
1
vote
2answers
75 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 ...
0
votes
0answers
44 views

Cartodb: Linking social data to road color scheme

I am recreating this "smelly maps" project on cartodb. I'd like to create symbology on roads (IE: color roads red,blue,green,yellow) based on the information I am receiving on social media. View ...
2
votes
2answers
170 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 ...
4
votes
0answers
30 views

QGIS Color text labels the same color as the feature [duplicate]

Using QGIS 2.12.1 on Ubuntu 14.04 Desktop. What I have is a layer where each feature is a different color. I also want to label each feature but I want the label colors to match the feature colors. I ...
0
votes
1answer
66 views

NDVI colour scheme for ArcGIS

Does anyone have a download link for the NDVI colour scheme to use in ArcGIS for Desktop? I am looking for MODIS mod13 data and cannot find an appropriate colour scheme in the programme.
2
votes
0answers
42 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 ...
1
vote
2answers
320 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
1answer
86 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.
0
votes
1answer
121 views

Printing ArcMap layers in black and white?

I am working in ArcMap 10.1. I would like to print a select few layers in black and white and have one or two layers print in color? Can this be done? If so how?
4
votes
1answer
38 views

Trouble saving graduated color style in Spatialite db in QGIS

When I attempt to save a style with graduated colors for a vector layer in a Spatialite db, I receive the following error: Error looking for style. The query was logged I had success saving ...
4
votes
2answers
103 views

Manually selecting colors for different polygons within layer in ArcMap?

There is a polygon layer with several polygons. They are displayed with some colour which can be changed simultaneously for all of them. Is there a way to manually select several polygons (without ...
0
votes
1answer
62 views

Importing World Map image, color issues?

I am having a hard time finding a world relief map with "lighter" ocean colors that will actually display as such in Arc. This is the image I download from the web but this is how it displays in ...
2
votes
1answer
155 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
1answer
330 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
2answers
85 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/ ...
0
votes
0answers
28 views

Changing color of individual parcels in CityEngine?

How do I change the color of individual parcels (i.e. specific section of a layer) using CGA codes in CityEngine? I have 4 sections within my layer and I need to change the color so that each one ...
0
votes
0answers
18 views

How to ApplySymbologyFromLayer but autogenerate unique color?

I am trying to write a script that will allow me to change all the layers within a selected group layer to a particular symbology. For example, we often want to change our point data to all display ...
1
vote
0answers
40 views

Create a Geotiff with different colors

I have a geotiff raster image. I have estracted the WritableRaster, the envelope, and the gridsampleDimension I need to create a new geotiff using Geotools. GridCoverageFactory gcf = new ...
32
votes
7answers
24k views

Choosing 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 ...
0
votes
1answer
64 views

arcpy: read color value of shapefile loaded in ArcGIS Desktop

I've got various polyline shapefiles loaded in ArcGIS, each using the default line style with different colors. For a python addin I'm working on I would like to use arcpy to read the RGB value of ...
5
votes
1answer
915 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 ...