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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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Show settlement labels on a map based on population and settlement density in different areas

Is it possible to show settlement labels based on population and settlement density in QGIS 3.36? I have two layers of settlements: Biggest Cities Layer: This layer contains the largest cities, which ...
Filip's user avatar
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3 votes
1 answer
77 views

Default QGIS style symbologies not displaying

I have been installing and uninstalling QGIS (different versions) yet they are not displaying features symbols/styles in the symbology. I am using a HP ELITEBOOK core i7, 8 gen, Windows 11. What might ...
Ndevashiya Simon Kulaumone's user avatar
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33 views

Sorting orders of layers for presentation

This is basic functionality that I use often but cannot get it to work on a particular project. QGIS 3.16. I have three symbology rules on a layer. The 'sub' layer(rule) that should be on top keeps ...
Sean's user avatar
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2 votes
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Explaining syntax of the to_date function in QGIS Expression

In QGIS 3.16 I have loaded a CSV file with the following format: and joined it to a shapefile. I am trying to build an expression within Symbology and have tried various ways, one of which: "...
Sean's user avatar
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0 votes
1 answer
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Arrow symbols are 180deg off rotation in QGIS

I'm using QGIS 3.36, and I have a layer of geotagged images that I've marked with arrows. I've rotated the arrows with the images exif data and while they're all rotating, I've noticed they're ...
oucil's user avatar
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1 answer
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Graduated symbology

I have opened a delimited text file with coordinates XY defined in two columns on the file plus two other columns with data and they are represented in QGIS as a point layer. I want to symbolize the ...
DobleG_95's user avatar
1 vote
1 answer
32 views

Showing bin upper/lower bound for discrete legend for raster in QGIS

I want to have binned coloring/legend for my raster data. I can get to show only the upper bound of the bin. Is there a way to show the legend with upper/lower bound, like this? ['< 0', '0 - 0.05',...
yosukesabai's user avatar
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1 answer
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Filling with points to inside of shapefile using ArcMap

I have a shapefile and I have to fill with dots or points inside of my shapefile. Is that possible in ArcMap? Input value is total point number. Eventually each point should have latitude and ...
Talha Çelik's user avatar
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1 answer
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QGIS graduated Symbology display Null Values

Working with QGIS 3.28.15 Firenze. I was under the impression that QGIS was able to display "NULL" (empty) values when using graduated symbology. Is this not the case anymore? I would like ...
Stryder_95's user avatar
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Updating symbology of layer using selected features of another layer and table linking the two

I would like to come up with a visualization scheme for a connectivity matrix. I have two sets of polygons, and a table that shows the connections between them. I want to create a symbology using the ...
calquigs's user avatar
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1 answer
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Order drawing layer and categories in QGIS

I have many layers in a view in QGIS with many different symbologies in each one. I need that one of those categories (RES) in a layer that is below (RedTransporte_pol), can be represented on top of ...
Natalia Bernal's user avatar
1 vote
1 answer
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Vary raster transparency based on cell values in ArcGIS Pro

I am trying to achieve varying transparency for a raster layer based on cell values in ArcGIS Pro. My goal is to make cells with lower values more transparent and cells with higher values less ...
Austin's user avatar
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1 vote
1 answer
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Change labeling font color for different unique values in the same label class using ArcGIS Pro

First of all I am very new to ArcGIS Pro and it's my first GIS software. I'm aware you can change the symbol for unique values in a label class, but can you change the color of the labeling so that it'...
EXiao's user avatar
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5 votes
1 answer
170 views

Rendering polygon by two variables in QGIS

I have a set of polygons with two variables "variable 1" which can take values A, B, C, D, and E and "variable 2" which can take values V, W, X, Y and Z. I would want to render the ...
Stephen Clark's user avatar
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35 views

qgis2map not showing the assigned symbology

I have a basic heatmap created from point vector, but when I use qgis2web to send to my supervisor, the radius of the points is altered. This is my first time using this plugin, and cannot find ...
Aagwood's user avatar
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2 votes
1 answer
29 views

QGIS CircularChart expression symbology

I was trying to recover some maps I did back in 2017 using QGIS 2.18. The map was using Circular Charts, this is a part of a longer expression in the Geometry Generator: CircularChart("NAirbnb&...
Albert's user avatar
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1 vote
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Exporting polygon layer to KML retain same color

There are two situations, first, I export layers which has yellow polygon contour to KML, but it saved as red (ff0000ff). Second, I combine two layers which is made by red polygon and yellow polygon ...
Leon's user avatar
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3 votes
3 answers
65 views

Representing direction on line from two Z-values in QGIS

I have a stream layer. Each stream segment contains a "z_ini" and a "z_fin", where "z_fin" < "z_ini". How can I graphically display the direction of the ...
fcka's user avatar
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0 answers
22 views

classification results into style segmentation of layer

I was trying to edit just a part of a shapefile. While trying to edit it, I classified the symbology to add a new style. After doing so the style of the layer changed from the first picture to the ...
pyjamajedi's user avatar
1 vote
1 answer
40 views

Applying Symbology to Feature Layer from ArcGIS toolbox

I'm running into an issue applying a symbology layer (.lyrx) to a feature layer from an ArcGIS Toolbox. I am able to apply the symbology manually as well as through the ArcGIS terminal window without ...
Geno's user avatar
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7 votes
1 answer
152 views

How to change the default symbology units of measure?

The default QGIS symbology unit of measure is millimeters (see highlighted screenshot below). This is true for both the main map display and for Print Layouts. The default millimeter setting can be ...
Stu Smith's user avatar
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Auto-applying symbology changes in ArcGIS Pro without clicking Apply every time

I previously tried using a newer version 3.3, It was great to provide a small button (auto-apply) that enables you to make the symbols change automatically immediately after changing the symbol ...
TAHMI SADIQ's user avatar
1 vote
0 answers
40 views

Saving QgsSymbol as image with specific DPI using PyQGIS [closed]

I want to save QgsMarkerSymbol as a high dpi image (png) invoking the asImage method and then save its result (QImage) in a local directory. I tried using a custom QgsRenderContext object like in the ...
GallPeters's user avatar
1 vote
0 answers
45 views

Correctly stack road segments while having nice endings

I'm trying to correctly lay out a road system in QGIS. My public data source can be found here. I've clipped the data source to a boundary. And then set the road endings to have a rounded end, which ...
David's user avatar
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37 views

Create distance buffer for virtual layer with categorized symbology QGIS 3.34

I want to create a virtual layer with a fixed buffer distance e.g. 1000 m from a buliding layer as input. The building layer contains information about its use in colum X of its attribute table. The ...
Kevin_S2021's user avatar
3 votes
1 answer
109 views

How to stretch an image into polygon symbology on QGIS?

I have a world map polygons (vectors) on QGIS 3.28, and i want to add flag on each country. I have already a svg flag for each country on a field, but flags are represented like a mosaic: I try to ...
Rien Avoir's user avatar
0 votes
1 answer
31 views

QGIS: Top symbol based on comparing values across different layers

I have several layers which overlap sometimes. I want the symbol visualized on top to be based on the smaller value between the three layers. How can I do that?
user243380's user avatar
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27 views

QGIS: display a common graduated style based on a common attribute column of all layers

QGIS: I have several layers which contain the same attribute with different values (for example attribute X). I want to display a common graduated style based on the common attribute column of all ...
user243380's user avatar
3 votes
1 answer
89 views

Excluding some values from the quintile classification in QGIS

I am working in QGIS with a vector layer of about 8000 records and I would like to use the graduate symbology, equal count (quantile, 5 classes) with a variable that contains some records to which the ...
Geo_it's user avatar
  • 523
1 vote
1 answer
43 views

ArcMap does not sort numbers of <1 correctly in unique values symbology

I have an issue in ArcMap when working with values that are lower than 1. In the symbology dialogue, when I go to unique values and choose all values for an attribute that has some values of <1, ...
Nisha's user avatar
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0 votes
2 answers
57 views

QGIS: Make larger symbols appear behind smaller symbols from the same layer

Points from a point dataset (delimited text file) are shown with graduated colors and graduated size. The symbology setting is as in figure A. The points overlap each other according to their listing ...
stonebe's user avatar
  • 467
0 votes
1 answer
48 views

Can ArcGIS Pro create virtual fields?

I need to be able to calculate the difference in months between a set date saved in a field and the current date. The Feature will be symbolised according to the resulting number of months. The ...
Robert Buckley's user avatar
0 votes
1 answer
25 views

Arcade - problem with rule-based styling for more than one condition

I want to set the Arcade expression in my ArcGIS Online project, which will be based on more than one criterion. I need to include two fields instead of one as I can usually do in ArcGIS Online ...
Geographos's user avatar
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1 vote
0 answers
55 views

Symbology changes when clipping raster QGIS

I'm using land cover/land use .tif imagery available at the Esri living atlas (https://livingatlas.arcgis.com/landcoverexplorer/#mapCenter=-73.64341%2C10.81044%2C11&mode=step&timeExtent=2017%...
Camila Valdés Cardona's user avatar
2 votes
1 answer
83 views

Symbolize one band mosaic dataset with unique values

I have many rasters of 8 bit unsigned integer data type which I want to symbolize using Unique values. When I add the rasters individually to the map I have that option: I want to add them all to a ...
Bera's user avatar
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0 votes
0 answers
24 views

QGIS 3.22.16 Roads not centered on the background

I am working on QGIS 3.22.16. I offset -3 for the right lane layer and leave 0 for the left lane layer. So the lanes don't overlap. However, the lines don't seem to follow the background routes. Is ...
GIS Noh's user avatar
  • 321
0 votes
0 answers
23 views

Using rule-based symbology and cluster point symbology on the same layer?

Working on a tax per acre project for every parcel in Maricopa County, AZ. For each parcel, symbology is based on the following: symbol_shape: categorized: land_use_category (SFR, Commercial, etc) ...
Jeremy Thacker's user avatar
0 votes
0 answers
12 views

How to write an SLD to put the lower left corner of the external symbol on the points in GeoServer

I have a point layer in GeoServer and I used a simple SLD like this: <sld:StyledLayerDescriptor xmlns="http://www.opengis.net/sld" xmlns:xlink="http://www.w3.org/1999/xlink" ...
milad's user avatar
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0 answers
37 views

Use images as symbology for point features

I have a vector file that contains points having a name attribute that matches the name of traffic sign images I have stored locally. What I'm trying to do is to assign to each point its corresponding ...
aogino's user avatar
  • 15
0 votes
1 answer
80 views

ArcGIS Arcade Pop up expression - How to get a list in the pop up to show colours related to symbology

I'm relatively new to ArcGIS Arcade but I've been trying to learn, with lots of help from Esri lessons and articles - also Copilot assists with some scripts. Outside of one of the lessons learning ...
ChrisT671's user avatar
0 votes
0 answers
20 views

Get or set layer display parameters using Python (reading documentation general question)

I'm having issues with finding data in QGIS Documentation so I wanted to ask how to access display parameters of layer (get existing values and change/update them). I know that layer symbol can be ...
svn's user avatar
  • 101
0 votes
1 answer
46 views

QGIS Symbology to have 2 subtypes

I have a layer called 'LaneC' Within that layer there are two attributes (Lane and Bay) Is there any way to symbolise so that when I click the layer LaneC, a dropdown is shown to show Lane (which is C)...
guest_231213's user avatar
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0 answers
40 views

Gradient fill polygons possible in web maps?

I need to be able to display polygons with uncertain boundaries in a web map I am building. Here is an example: I have styled this example in QGIS using a Gradient Fill. I cannot find a way to style ...
staf's user avatar
  • 326
3 votes
1 answer
80 views

Changing marker shape to ArrowHead using PyQGIS

With the code below I can add a marker to the symbology of a line type layer. But by default, this marker is a circle. layerName = 'rede_bombas' vLayer = QgsProject.instance().mapLayersByName(...
Aloísio Ângelo's user avatar
0 votes
1 answer
23 views

ArcGIS "Buffered"/Blurry Point Symbol

I have a point layer with oscillating confidence in their correct location (1-5) and want to style them representing this fuzziness. In a storymap, I found a symbology with radially increasing ...
Wernazuma's user avatar
0 votes
0 answers
19 views

Format Multiple Symbols using ArcGIS Pro and Apply is greyed out

I am trying to change all of the symbology at once for a points layer. When I go to the Symbology - Primary Symbology and then click on more- format all symbols, the apply button is greyed out and I ...
Cori McMaps's user avatar
1 vote
1 answer
31 views

Apply symbol from one category to other categories and retain color already set

Is there a way to apply or change a symbol of one category to other categories without changing the already set color in the QGIS symbology window? After setting up a symbol, I can change the color by ...
basto's user avatar
  • 162
0 votes
0 answers
20 views

QGIS - Expression for a chart symbology with a clustered layer

I have a layer with buildings that I have clustered and wrapped with a covex hull. Each building has specific information attached. e.g. information about the year of construction. Currently I have ...
Josephine's user avatar
0 votes
1 answer
48 views

Varying symbology by two fields of attribute table in ArcMap

I got a point layer and my task is to visualize it according to two (2) values of its attribute table at the same time: each point (a) has to be presented as graduated symbol size (manual ...
Daniella.GIS's user avatar
4 votes
1 answer
100 views

Sorting Classification by another field

I am currently using the QGIS software. I use rule-based classification to extract the monetary values from a field and display them as symbols. For map legend purposes I need to concatenate the ...
Ernst's user avatar
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