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Questions tagged [symbology]

The set of conventions, rules, or encoding systems that define how geographic features are represented with symbols on a map.

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2answers
36 views

Displaying rainbow colors for multiple polygon layers in ArcMap?

I am working with ArcMap and I have a series (20) layers - polygon lines in a group. I would like to ask you a way to color (not manually) all the lines with a rainbow color palette. The lines are map ...
1
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1answer
20 views

Structural geology SVG symbol library

Is there a public source with an SVG library of symbols for structural geology mapping in QGIS ?
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1answer
11 views

Changing thickness of lines in GraduatedColorsSymbology using arcpy

I have been using the following code (works) to update the symbology of a layer in ArcGIS. Now, in addition to this, i need to change the thickness of the lines previously symbolized by using ...
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0answers
8 views

Change raster symbology in Google Earth

I have a raster with discrete terrain classes that I want to visualize in Google Earth (Pro). However, when I import the .tif, Google Earth gives it a black-white stretched symbology, as opposed to ...
2
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0answers
51 views

QGIS 3 - Wrong legend for datadefined size points layer

I am trying to generate a proportional symbol symbology using data defined symbol size in a QGIS 3 python plugin. Here is the working code : # Symbol creation symbolLayer = ...
5
votes
1answer
124 views

QGIS Gratuated Symbology gives differents results on every classification with Natural Breaks (Jenks)

When styling a polygon layer using the Graduated styling and the Natural Breaks (Jenks) mode, QGIS is classifying the data with different values. So every time I click on "Classify" the values are ...
1
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2answers
34 views

Keep the symbol in the Layout Map but do not show it on the Legend?

I am trying to find a solution to not display the name and the symbol on the Legend on my ArcMap Layout but I do want to keep the symbol in the Layout . Here is the screenshot I have ArcGIS Desktop ...
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0answers
49 views

Using the geometry calculator to create lines between points in QGIS 3.4?

I have a postgreSQL database layer (with a postgis extension) that updates every 5 minutes and is creating points of the current location of ships. I can't seem to figure out how to connect the points ...
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1answer
28 views

Geoserver : how to use getlegendgraphic to avoid duplicate symbols in legend because of rules

I am currently doing a master's internship in a town hall. I am working on improving the interactive map of the municipality where I work; it uses the Geoserver platform to host the layers and their ...
1
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1answer
27 views

QGis 3.4 Categorized Symbology: Overlapping objects

I have a point layer with categorized symbology One object is a big point and one is a smaller one. How do I change which one is displayed in front of the other one?
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2answers
33 views

How to display more than one attribute in symbology in ArcGIS Pro?

I want to color code temperature and represent precipitation by dot density in the same map. How can I do this in ArcGIS Pro?
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0answers
38 views

Using demographic evolution color ramp in QGIS?

I'm working with QGIS Desktop 3.4.4. I'm working on demographic evolutions at municipality scale with polygons. I'm used to work with the "YlOrRd" Color Ramp, but it is very unclear to see wether ...
2
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1answer
26 views

Changing representation overrides to attribute driven symbology for migration to ArcGIS Pro

We currently use a lot of symbology representations in our map production workflows in ArcMap and are considering moving to ArcGIS Pro, which does not support representations. Many of them will be ok ...
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1answer
28 views

Use relation to apply same colour to children feature

I m'looking for a function with field calculator in a symbology context to apply the colour of parents features to the children with transparency.
5
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1answer
101 views

Blinking symbology in QGIS on database values

I made a geopackage to plan Aids-to-Navigation for maritime environments. In my database I have a few fields that describe the character of the lights that are to be placed on the planned A-to-N's. ...
2
votes
1answer
77 views

QGIS change legend symbol size independent of map

I'm using QGIS 2.18. The screenshot below shows the print composer. At the moment, the only way I can reduce the size of symbols in the print composer is to reduce the size of the symbol on the map. ...
2
votes
1answer
155 views

What does this symbol mean?

I have just used the shape tool to create an elliptical buffer around a point. However after doing this, within my layers table I have the symbol seen within the figure below (seen in red box). Note, ...
2
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0answers
25 views

How do Joins & Relates in layer file and Layer Properties work?

I'm using ArcMap 10.5. I set up symbology for a feature class based on joined attributes from a table in the same file geodatabase. I want to be able to apply the same set-up in different geodatabases ...
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0answers
52 views

Visualizing signal strength of mobile towers

I have a list of latitude and longitude along with signal strength obtained from mobile towers in a certain region. I have all the data in CSV format. In total, I have 4 CSV files. I have mapped the ...
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0answers
13 views

Symbol Categories for OGC WFS in ArcGIS Portal

When add WFS layers to a map in ArcGIS Portal the symbology for OGC WFS appears to be restricted to a single symbol. Where as there is a somewhat more extensive set of options for ESRI 'Feature ...
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0answers
22 views

Mapping density: Creating set range for multiple attribute tables

I have multiple attribute tables (for each state of a country) with data for population and area, and want to map population density. The standard way to map density (example below) automatically ...
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0answers
12 views

Symbolizing Zero In a Range

I have a series of values that range from -100 to 100. I am using the Quantities symbology, and I want to have the 0 mark be the midpoint without using categories. I tried typing it into Symbology and ...
3
votes
0answers
63 views

Fixed QGIS layer symbol size in layer legend

When a layer symbol is defined with map units or "meters at scale" unit, it is sometimes shown in the legend at a very small scale, preventing to see the details. Or if we zoom in the map, the legend ...
0
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2answers
50 views

Applying SVG marker as additional symbol to polygon layer in QGIS 3

I would like to add SVG markers as an additional symbol to a polygon layer. The polygon layer is rendered with a categorized symbol renderer with different fill-color, and I want to add SVG markers ...
0
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2answers
32 views

Don't show empty categories in classified style

I have a geojson file containing line and polygon features. I want to render them according to the field Feature Type which contains different types. When I use categorized symbology, it creates ...
2
votes
1answer
64 views

Using graduate and categorize in QGIS?

I'm using a .csv detailing types of renewable energy in the UK. I want to display them as different colours for the types of energy (e.g. wind, solar, gas etc.) but also a different size symbol based ...
3
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1answer
66 views

Using geometrygenerator and different CRS in QGIS?

In a QGIS3-project (QGIS Version 3.4.3) I'd like to display points from a textfile and constructed lines from this points in an given length and an angle from the textfile with the geometrygenerator. ...
2
votes
1answer
45 views

Force a minimum value in a color ramp classes in QGIS 3.4.1

I am trying to apply a color ramp to a shape using percentage values where red would be low and green would be high. The data ranges from 74% to 100%, but I need the minimum value to be 0%, so that ...
1
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0answers
27 views

How to enable and change Symbol levels programmatically? [closed]

I have a vectorlayer which contains some features and I'm having problems representing them because they are being overlapped with an incorrect order. They have a field that numerate each feature so ...
2
votes
1answer
28 views

Symbology for multiple attributes within the same feature class in ArcMap

How to represent two variables in one graduate symbol "figure", colors and graduate size circles.
8
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2answers
168 views

Setting dashed stroke style when layers have features with sharing borders in QGIS?

Layers like municipalities, countries, ... have features sharing the border of their neighbours: they share the same vertices (except for the features at the edges off course). I have a municipality ...
0
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0answers
34 views

Using arcpy.ApplySymbologyFromLayer_management to copy symbology from input symbology layer to ArcGIS Pro layers?

I wrote script below to copy symbology from source layer to my all other layers generated in this script. It does generates output but when I add layer to the TOC, I don't see any symbology to any of ...
1
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1answer
85 views

Changing marker symbol in Leaflet AJAX

I have got a .json file to display in Leaflet map.The points are shown with custom blue dot markers. I cannot get to change them.How do I get to change the symbol? var greenIcon = L.icon({ ...
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1answer
21 views

Fill the color of polygons with some attribute value using ArcGIS

I have a large set of polygon features where I need to add some attribute value in "Name" field. Because it is a large set of polygons I want to have all polygons where I have add the value to be ...
2
votes
1answer
52 views

ArcGIS Online Webmap: Summarize values of overlapping polygons in quantitative symbology

I am attempting to create a dynamic webmap to display varying values across a grid of polygons. Within each grid cell there are multiple overlapping polygons (grid cells) each with a unique value. I ...
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0answers
22 views

Understanding drawing order after Apply symbology from layer in ModelBuilder using ArcGIS Desktop?

I just noticed that my layer file which has specific symbology and drawing order for points. Hence, for the symbology to work using the model "draw this layer using the symbology levels specified ...
0
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1answer
33 views

Find out the min and max symbology for each band at the command line

I would like to automate the process of getting the correct symbology min/max scale for each of the RGB bands via command line. My use case is I am converting multi-band GEOTIFFs to JPG using the ...
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0answers
11 views

Update raster symbology when setting the source to another layer in ArcMap?

I have several raster layers for the same type of data, but for different areas. Is it possible to somehow use the symbology (like colors, breaks(standard deviation), 0 number of decimal places etc.) ...
1
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0answers
21 views

ArcMap Graduated symbols: Color and size

Is there a way to get graduated symbols with two quantities being shown? I am making a map with bus stops where I need to show two quantities both of which are continuous. - Symbol size: For ...
3
votes
1answer
28 views

ArcGIS 10.2.2: How to display attribute values using a representative number of symbols?

I am using ArcGIS 10.2.2 Advanced. I want to produce a map where the value of attributes in each polygon is shown by a representative number of symbols in each polygon. I have used Quantities > Dot ...
3
votes
1answer
89 views

Styles with parameters

I'm using QGIS 3.4 , and without going into python scripting, is there a way I can create some kind of rule based styles where I can add a parameter? I have a number of layers, each with between 1 ...
1
vote
1answer
111 views

Categorized symbols are not working in QGIS 3.4

I'm trying to generate categorized symbols for a polygon layer in QGIS 3.4. The code below should generate random colour polygons for each record of 'run' layer and I'm not getting any error message. ...
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0answers
26 views

Editing Symbology based off two qualitative attributes using ArcGIS Pro?

I have a map that shows the location of businesses. The underlying table also includes number of employees per company as well as industry. I know how to tweak the symbology to make my points use ...
1
vote
1answer
22 views

Show differenet SVG icons on one layer at runtime

I need to show several SVG icons (more than 388 icons) with different name on a single layer(if possible on memory layer). I am using QGis 2.8 and qt4.8.6 The icons represent different kind of ...
3
votes
3answers
170 views

Changing field types so graduated symbols are available

I can't seem to make graduated symbols work. When I try to click on my column it doesn't show any options. I think these is due to those columns being formatted as text and not number. Any ideas how ...
0
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2answers
41 views

Providing multiple shapefiles belonging together in single file with predefined symbology in ArcGIS Desktop?

There are multiple shapefiles which belong together and should be provided in a single file with predefined symbology (see figure). Is there an option to do so? Currently, the shapefiles are bundled ...
3
votes
0answers
31 views

How to render features that are just outside the map canvas extent in QGIS 3.4?

I am trying to generate a cloudy mask, following the recipe in "Qgis Map Design 2nd ed. Edition". For the most part, I have it working. But when panning around, the mask changes. And I think that ...
1
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0answers
36 views

How to make a QGIS 3 Layer refresh after a joined data source is updated

I have a layer of ZCTA features that is sourced from a SpatiaLite table that is joined to an Excel spreadsheet and rendered with categorized symbology. That all works fine. The join configuration is: ...
2
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1answer
97 views

How to create a symbol with directional arrows in QGIS 3?

This is the same as this question for ArcGIS: Creating Directional Flow Arrows for sewer lines? but for QGIS. I tried to follow the same approach as in ArcGIS, but I keep missing the mark. I think I ...
0
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1answer
116 views

Setting values for palette in Google Earth Engine

I am very new to GEE. I have been trying to figure out how to assign different colours to different NDVI values. Let's say, in following code, I want to assign 'red' for NDVI value of 0.2-0.4, 'orange'...