Questions tagged [visualisation]
The representation of data in a viewable medium or format
440
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28
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Cross section automation & overlay
I'm trying to automate and visualise the frequency and different type of road corridors along an existing route.
The route spans multiple kms and I'm trying to show the predominant types of corridor ...
0
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0
answers
12
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Barplot with a basemap as a background
I have some data as a pandas DataFrame with values associated with longitude. I have plotted it as stacked bars like this:
A subset of the data as an example via df.to_dict():
{'Commodity driven ...
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2
votes
1
answer
42
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Different visualisation in attribute table
The visualisation in the attribute table is different for fields with the same data type (some are greyed out and the values have different positions)
Any suggestions?
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1
answer
82
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I am unable to open raster using rasterio
I am trying to open a raster file that I have downloaded using rasterio. It is a satellite image raster file of part of UBC in my data folder which I downloaded from Abacus Data Network. the However, ...
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0
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58
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Change CRS of vector data on GeoPandas
I have a dataset for the Provinces in Canada obtained from statcan.ca. I am trying to visualize the data using GeoPandas library. I used the to_crs approach to reproject the dataset from its current ...
2
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3
answers
120
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Creating topographic "layer cake" map a.k.a. Tanaka contour in QGIS
I'm wondering if there is any way to create a map similar to the image below. Basically, it would be the contours extruded, add a singleband pseudocolor ramp as the color on top, and be able to ...
0
votes
1
answer
9
views
Visualization of path-oriented images
I have path-oriented satellite images, the georeferenced points are written to a header (geotif). When I open them in QGIS each pixel is rotated to the top (North), they are not path-oriented anymore, ...
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27
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QGIS view point data
In kepler.gl I can hover over a point and get the corresponding data from the CSV file it was loaded from. Like this.
Is something like this possible in QGIS?
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35
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Google Earth Engine [closed]
I tried to visualize the imagery but it told me there were no bands to visualize, what might be the problem?
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1
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2
answers
106
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Elongation problem with Seaborn's Kdeplot
I am currently working on creating a Kernel density estimation (Seaborn's Kdeplot) visualization of point cloud data between two countries. However, I have encountered a problem for which I need some ...
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1
vote
1
answer
62
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Visualizing features from properties of a feature collection
I would like to know how to visualize features (points) situated in the properties of feature collection that was obtained after applying 'spatial joins' on primary collection ( protected areas (...
- 11
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answers
44
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earthengine: correct max value to plot RGB of Sentinell 2?
I would like to display the RGB true colors of a Sentinel Image in Earth Engine. I understand that I should adjust the parameter max in Map.addLayer(..., {bands: ['B4', 'B3', 'B2'], max: 7000}); given ...
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6
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3
answers
148
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Visualizing point attribute (int) with multiple dots / SVGs in QGIS
I am looking for a possibility to visualize an attribute in a point layer in QGIS, by displaying multiple dots or SVG graphics.
To be precise, I have a point layer about a disaster incident containing ...
- 61
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votes
2
answers
54
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Rasterizing point data
I downloaded point-source data of the bumblebee distribution in Europe (Suppl. material 5 from https://doi.org/10.3897/oneeco.3.e28143).
I'm only looking at the composite probability and want to ...
- 1
3
votes
1
answer
111
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Marker at the end of arrow line in QGIS 3 with offset
I have a line layer for arrows in QGIS 3, and I'd like to display a marker at the end of each arrow. I tried to add a marker line on top of my arrow with a marker placed only on the last vertex, but ...
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2
votes
1
answer
133
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QGIS: Combine stripes of different colors on polygons
I want to create a map that shows in which country which companies (offering the same product) are active. The style of the map should be similar to this one (source):
So, if company A is red, ...
- 21
2
votes
3
answers
526
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What is the right EPSG CRS code for the United States?
This is my first experience with US cartography. I downloaded the US states from here
https://www.census.gov/geographies/mapping-files/time-series/geo/carto-boundary-file.html
(the layer is ...
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1
vote
2
answers
85
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Visualize the number of images per years from an ImageCollection of only Landsat images in GEE
I am trying to create a chart showing the number of images per year from an ImageCollection of Landsat images but I can't seems to find a solution for it (my ImageCollection consists of Landsat images ...
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-1
votes
1
answer
41
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Polyline FLAT Buffer: How to create coverage beyond ends of line? (VISUAL REQUEST)
To clarify, if we consider the output of a buffer when choosing FLAT or ROUND.
I'm wondering if there is a way to extend the area coverage of the FLAT type beyond the ends of the line with a similar (...
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6
votes
2
answers
191
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Representing five categories of data in one symbol using QGIS
I have been given the big task of representing a lot of data in one symbol. The plan is to represent 5 categories of data in one symbol.
I hope to do this by changing factors such as:
Fill colour
...
- 63
3
votes
1
answer
101
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Display points on identical location from multiple layers with an offset
I have several layers containging points holding information. Some of them are at the exact same locationg (as they originated from the same file, describing varous categories at the same location).
...
- 1,217
5
votes
1
answer
182
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Using multiple XY fields for geometry definition in point layer in QGIS
In QGIS 3.26.3 Buenos Ares I have a set of drill hole point data with XY fields for the planned drill hole location and a second set of fields for the surveyed XY location after drilling.
I want to ...
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5
votes
3
answers
239
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Filtering which points to display using expressions in QGIS
I have a load of points loaded in as a CSV file. I want to show only certain points based on their name, e.g. only value1, value4 and value8, the field name is "Drilled ID".
I have gone to ...
- 237
6
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2
answers
264
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Displaying label if field contains 'X' or 'Y' value in QGIS
Trying to create an expression to display labels from a field called "Drilled ID", but only if the field named "Status" contains 'Week' or 'Active' but to no avail. If the "...
- 237
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answers
48
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Hue and intensity visualization from two bands in python
I would like to visualize this raster image (SAR interferogram) in a way that the phase band gives the color to the pixel and the coherence gives the intensity (value). This is the image: https://...
- 138
2
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0
answers
313
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Visualize uber h3 hexagon in Power BI
I have two columns. One is h3 index and other is quantifying column. I have converted each hexagon into WKT. I am not sure how I can display hexagons over a map in Power BI.
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votes
2
answers
489
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Rule-based parent child symbol layer view in QGIS
I have QGIS 3.22.15 and I have a point layer with three fields: "FID", "UNIT", "PARENT". Each "UNIT" is associated with the "PARENT" field, thus ...
- 353
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0
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193
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Making two-way flow map in QGIS
Is there a way to make, with a clear process, a two-way flow map (possibly curved) in QGIS 3?
I have seen some tutorials, but not detailed enough (at least for a bad coder like me); I have tried the ...
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2
votes
0
answers
128
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QGIS visualization of Pleiades image is gray and fixed only when copying style
I have airbus Pleiades images which has 4 bands - B , G , R and NIR.
The image was reprojected (4326) and resampled (50cm) using GEE as following:
task = ee.batch.Export.image.toCloudStorage(
...
- 1,967
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votes
1
answer
177
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Setting constant labels positions in QGIS
I've been trying to figure out how to stop the labels from moving when dragging the map with the cursor.
Is it possible to prevent this from happening? I am new to QGIS and don't really know what to ...
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6
votes
1
answer
181
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Performing basic labelling with PyQGIS
I'm trying to display labels using PyQGIS.
In this case, I create the layers manually, so I guess you need to add a "Label" attribute to the feature as well.
Therefore, I've written a little ...
2
votes
1
answer
57
views
How can I create a 3-dimensional cube legend (R)?
Has anyone ever plotted a 3-D (cube) legend as shown below? Essentially trivariate mapping.
I would like to recreate the below using the same variables of population, built (% area that is built up) ...
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1
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0
answers
216
views
Making map with marginal graphics like rasterVis::levelplot(margin=T)
I love rasterVis::levelplot(margin=T) because its marginal graphics show the column (x)
and row (y) summaries of the Raster object. I think it is very helpful to visualize the raster.
Package ...
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1
vote
1
answer
85
views
Assigning colors to classes using conditional statements using GEE
I am trying to assign colors to each of the class by checking the conditions (condition on - pixel values). But it doesn't check the else statements, it only checks the if:
if (image.gte(0.1).And(...
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0
answers
82
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Legend for gridded Holoviews visualization with categorical data
I'm using the holoviews extensions to visualize a gridded dataset with landcover classes. Plotting the data is straightforward with da.hvplot(). This results however in a continuous colormap with ...
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2
votes
1
answer
176
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How to add circle around points?
For a point, how do you create circles that shows a certain distance from a point. For instance, I have the following point:
What I want to have is this:
For instance, while the black circle ...
- 161
4
votes
2
answers
115
views
Visualizations disappear when reopenning
Data is reloaded when I reopen the QGIS, however all of the visualizations disappear when I reopen the QGIS. I add the dataset as follows:
Visualization looks as follows:
When I reopen the QGIS, it ...
- 161
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votes
0
answers
337
views
Folium Marker-Cluster map is not visualized for a large dataset
Im trying to create a Marker-Cluster map using folium for some data, I first tried with a sample dataset where the sample size is 1000 row points, which ran fine with no error. But when im trying to ...
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vote
1
answer
213
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Visualizing German ALKIS LoD2/cityGML data in 3D map view QGIS 3.22
I have a dataset containing all relevant information to build a 3D building (https://ldbv.bayern.de/produkte/3dprodukte/3d.html) with one layer containing roof information (incl. orientation and slope)...
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2
votes
1
answer
119
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Showing full list of names of features within polygon when hovering over it in QGIS
In QGIS I've successfully joined three tables of data: 'Addresses', 'Persons', and 'Polygons'. The polygons represent the address on the map, and each address "contains" the names of all ...
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votes
0
answers
64
views
Is a viewshed reversible?
I want to understand what is visible by a human observer standing in a particular location. Therefore, I have conducted a visibility analysis in ArcGIS with a DEM, using an observer offset of 1.75m to ...
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1
vote
2
answers
599
views
How to show points on LineString in QGIS?
I created a shape file with the following schema in python:
schema = {
"geometry": "LineString",
"properties": {"id": "int"},
}...
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0
answers
114
views
Automate layout design on ArcGIS Pro
I have 100 different layouts, each zoomed to different polygons on the map. I would like to add two accompanying images, that are unique to each layout and positioned as shown in the screenshot below.
...
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votes
1
answer
173
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Visualization of multiple classes based on one raster band with Google Earth Engine
I'm working with Google Earth Engine and I have a raster image with one band and pixel values between 0 and 2. I want to create three classes:
class 1: pixel value = 0
class 2: pixel value = 0.01 - 0....
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1
vote
1
answer
305
views
Converting nested JSON flight data into shapefile or similar
I am creating a visualisation/map of typical flight patterns over Los Angeles, California. I am interested not in live data, or even particularly recent data; rather, I am hoping to find a data set ...
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1
answer
147
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How to set number of columns with stack or brick or spatraster in rasterVis::levelplot?
If I have a spatraster with 6 layers, rasterVis::levelplot will give a 2 rows and 3 columns plot.
How can I change it to 3 rows and 2columns?
library(rasterVis)
library(terra)
f <- system.file(&...
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votes
1
answer
42
views
Creating 3D representation of line shapefile using ArcGIS
I have a line shapefile of links that build a network. Now I'd like to assign each node (or every end of a line segment) a z-value depending on a certain attribute.
Is it possible to then display this ...
- 326
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votes
1
answer
38
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ASTER DEM, Incoherence of slope analysis
I'm using a Aster tile DEM to perform some terrain analysis on an area in the French alps (original CRS:EPSG 4326-wgs 84), using QGIS 3.2. My projected coordinate reference system is EPSG:2154-RGF93/...
0
votes
1
answer
200
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Sharing GIS data with non-GIS users [closed]
I want to visualize and share GIS data with non-GIS users within my organization. The data basis is European CO2 emissions from industrial sites from the E-PRTR, thus a point data layer that should be ...
- 247
1
vote
2
answers
959
views
Same symbology and color for all attributes of layer in QGIS
In QGIS 3.22.0 (Bialowieza) I have a polygon layer with different attributes.
I'm making a categorized map for each attribute in my table. For that I'm duplicating and renaming my layer corresponding ...
- 575