Questions tagged [visualisation]

The representation of data in a viewable medium or format

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1 vote
2 answers
34 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"}, }...
  • 323
0 votes
0 answers
25 views

Visualisation with short calculation beforehand

I have nationwide lines. For each county (or state) I like to display the result of a small calculation with them. (length in county-30*points in county)*40 in a form similar to this nationwide ...
  • 389
1 vote
0 answers
24 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. ...
  • 21
0 votes
1 answer
22 views

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
60 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 ...
0 votes
1 answer
16 views

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(&...
  • 115
0 votes
1 answer
18 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 ...
  • 327
0 votes
1 answer
26 views

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
105 views

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 ...
1 vote
2 answers
125 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 ...
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6 votes
1 answer
109 views

Representing difference between polygons only with Symbology in QGIS

In QGIS 3.22 I am trying to visually represent a difference between polygons after its change. In the end I want to know where the polygon was enlarged (#72ff85) and where it was degraded (#ff7272). ...
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0 votes
0 answers
101 views

How do I drop pins/markers for hundreds of points and display them on a map (OpenStreetMap)

How can I import a list of 100 locations (addresses stored in a line-delimited file) and display them all on a map? I have the names of 100 towns/cities across a country. I have no idea where they are....
2 votes
2 answers
354 views

Creating polygon mask in QGIS

In QGIS 3.22.5, is there possible to use polygons for the masking layer? I want to use numerous little polygons to mask lines (only layer which consists of lines). In ArcGIS that works just by ...
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1 vote
0 answers
40 views

Find min and max values of a field (column) in a feature layer

I am using ArcGIS API for Javascript in a Nuxt application and I would like to find the max and min values of a field in a feature layer hosted on ArcGIS. How to do that? Here is the code. The values ...
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2 votes
1 answer
84 views

How to reorder categorical raster legend order in R

For example, I have a landcover raster and I want to use terra::plot to make a map. library(terra) test <- rast('test.tif') plot(test) The order now is "3,4,6,8". Now I want to reorder ...
  • 115
4 votes
1 answer
155 views

Displaying only part of points in QGIS

I have a vector layer with ~30M points, which is why the layer is displayed for a very long time. And I'm not talking about further work with him yet. Is it possible in QGIS to display only a part of ...
  • 43
0 votes
0 answers
39 views

QGIS Handling Heatmap Data Range

I have a grid of hexagons with data (ranging between 0 and 1) and, using the centroids of the hexagons as a base, I would like to visualise the data as a heatmap. On the technical side, this works ...
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0 votes
0 answers
20 views

Qgis2threejs changing rotation point

I am new to QGis and have an issue with the QGis2threejs plugin. I am trying and searching already for some hours, but couldn't find an answer for this - I hope it's not something obvious. If yes, ...
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1 vote
0 answers
57 views

3D visualization for irregular boundaries shows an infinite height

I am new to GIS. I am trying to visualize a DEM with irregular boundaries. When I am trying to show it in 3d via 3D map or Qgis2threejs, the boundaries get an infinite height that I can no longer see ...
5 votes
1 answer
159 views

Adding space between repeated symbol for SVG fill in QGIS

I recently learned how to perform an SVG fill for polygons. The result fills like a brick fill without spaces: Is there a way to define a space between the repeated image from within QGIS (as opposed ...
3 votes
2 answers
121 views

Algorithm of automatic ee.Image visualization used by Map.addLayer

The following code: var image = ee.Image("MODIS/051/MCD12Q1/2001_01_01").select(["Land_Cover_Type_1"]) Map.addLayer(image, {}, '2'); gives an RGB visualization displayed on the ...
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3 votes
1 answer
194 views

Representing roads consisting of polylines as polygons in QGIS

I am working with some roads in London that I downloaded online. The roads are represented as lines like below: How can I transform each road from a line into a polygon in QGIS? So that the roads ...
0 votes
1 answer
31 views

Visualizing GLDAS data using GGE

When I try to visualize any GLDAS data, it seems to be all black? I've tried adjusting visualization parameters with no success. Very short code snippet below: var Daily = ee.ImageCollection("...
0 votes
0 answers
119 views

D3.js globe view data visualization

I am using D3.js globe view as in the code penhttps://codepen.io/EleftheriaBatsou/pen/VQxdVY?editors=1000 India map that is in the globe view widget is not same as the one while verifying the globe in ...
7 votes
1 answer
197 views

Visualizing effectively transport transit lines in QGIS

I have a shapefile that contain bus lines. You can see a screenshot below: I would like to visualize the lines in a more understandable way since there are a lot of overlapping sections. I have tried ...
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2 votes
1 answer
179 views

Apply a random color on each feature of a featurecollection

I'm working in the JavaScript code editor and I would like to visualize features created from the reduceToVector function. The best way to visually assesses that the algorithm match my expectation ...
1 vote
1 answer
69 views

Categorising points layer using multiple values in QGIS

I've imported wildlife species sightings with individual sightings plotted. I now want to be able to display these sightings with more detail, firstly by assigning a shape to the "Class" (e....
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2 votes
1 answer
126 views

View vector GeoServer line layer in Leaflet

I have simple line layer created based on shapefiles. It can be viewed in GeoServer with OpenLayers preview: I also can be imported and correctly viewed in QGIS. I tried to visualize this layer over ...
4 votes
3 answers
192 views

Is it possible to do an "inverse/symmetrical difference fill" for polygons in QGIS, i.e. fill everything BUT the polygons?

I often deal with polygons that delineate an area of interest. When visualizing them, I have the problem that: using a fill "masks" the content of the area of interest, e.g. a background ...
  • 1,318
2 votes
1 answer
100 views

What do gradient stops' relative positions on colour ramp (%) signify when using QGIS heat map tool?

I'm using QGIS 3.18 heatmap tool to visualise the space use patterns of chimpanzees for my master's dissertation. I import each chimpanzees coordinates as a csv file and then change the layer's ...
1 vote
2 answers
341 views

Filter DEM image collection for elevation band value greater than 0, to show land only - Google Earth Engine

I'm trying to display only the land areas of a DEM image collection, by filtering the image collection for values greater than 0. I am not sure how to write the arguments properly. There is only 1 ...
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2 votes
2 answers
98 views

Dynamic Category thematic map

I am working in QGIS 3.8.3-Zanzibar on a shapefile with polygons. I am zoning by selecting the polygons and giving each group a different number (a zone code). In order to visualize it, I have a ...
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3 votes
2 answers
362 views

Improving readability of black and white map

I need to produce a map using grayscale (QGIS), as this figure will be printed in black and white. The map is made up of two layers: one cointains the polygon geometry (land cover) - there are five ...
  • 299
0 votes
1 answer
63 views

adjust visualization parameters as parametric values

i want to define visualization parameters for maps as codes in main coding space not as import record for this, i want to calculate the min and max values of image and set them in visualization ...
  • 97
1 vote
0 answers
33 views

Symbology on joined variables not showing up on map in QGIS

I am trying to add a certain styling to points I have on the map. I have set a Rule-based styling with a range added based on a different variable. Both variables were added to the point DB from a ...
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4 votes
1 answer
122 views

Using polygon fill effect to desaturate underlying base-map imagery in QGIS

In QGIS 3.12 I'm tying to use a draw effect with a polygon layer (that has an inverse fill) that will desaturate imagery underneath it, while keeping it's brightness the same. The objective is to have ...
4 votes
1 answer
256 views

Using data defined override for SVG-marker lines

After not getting enough detail on that part of my problem in this post, I am now trying in a separate question. I am unable to do data defined override with SVG markers on a line layer. I'm not sure ...
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3 votes
3 answers
127 views

Visualizing points with different colours based on field from polygon layer in QGIS

I am aiming to create a map showing species location records as points. I need to make the points different colours based on land type which is a polygon layer. So I want my species points to be a ...
1 vote
2 answers
38 views

Hiding pixel of one layer based on pixel value of other layer

I have a raster layer that contains multiple bands. I want to visualize one band in particular, but only the pixels that have a value of 0.6 or higher in another band of the same raster layer should ...
0 votes
0 answers
27 views

Adding 2D information to a 3D dataset in ArcGIS Pro

I am working in a local scene (ArcGIS Pro) whereby I have a 3D dataset that shows buildings within a city. This dataset has no further information (i.e. no attribute table) and all the 3D buildings ...
1 vote
1 answer
111 views

When visualizing WorldView and Ikonos imagery in Google Earth Engine, my images appear to have a blue tint. How do I display them in true color?

I'm using GEE to visualize WorldView and Ikonos imagery. If I just use the bands for image visualization as seen below, the image appears very dark: var vizWV = { bands: ['b5', 'b3', 'b2'], }; I ...
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0 votes
0 answers
44 views

Pyferret axes lines thickness

Is there a way to set thickness of specific axes in ferret? With the default pen the lower axis is thin or invisible if I output image as png. I've tried setting PPL PEN 0, 7, which makes this lower ...
  • 85
1 vote
0 answers
368 views

Remove default OpenStreetMap tile layer in Leaflet - Folium?

I have multiple maps in my Folium map (map1 and map2) however, I see OpenStreetMap as the default option. I want to remove the OSM option altogether and keep just my two custom layers. If I set tiles ...
2 votes
1 answer
220 views

Rendering three-composition raster map with ternary colormap using R

Say there are three raster maps, representing percentages of sand, silt and clay respectively. The three values for each cell are hence summed up to 1. I want to use one raster map to characterize the ...
1 vote
2 answers
91 views

QGIS - Visualize GML with CSV metadata

I have a file with 3D building information (GML file with building id and coordinates). Also, I have a CSV file with the same building IDs, coordinates (X-Y and Longitude Latitude), and additional ...
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6 votes
1 answer
252 views

Permanently viewing vertex of polygons in QGIS

I work with shapefiles in QGIS 3.20. I have many polygons and I need to see their vertices. How do I show the vertices on the polygons? I have gaps between polygons shown by the topology checker. I ...
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0 votes
0 answers
95 views

Visualising ground radar in QGIS using rendering

I have GPRI intensity ground based radar data as data validation for my SAR analysis. As this does not appear to be a multi-band image, how do I render this on QGIS so I can see my targets? I have ...
1 vote
0 answers
156 views

3D visualization of geological data in QGIS

I'm checking the possiblities of 3D visualization in QGIS for geological data. At the moment I am trying to visualize the surface raster and the sub-surface rasters together in a 3D View. It should ...
  • 51
0 votes
0 answers
72 views

Copy Raster changes max and min values of the newly created raster band in ArcGIS Pro?

I am using ArcGIS Pro 2.8 and I imported a NetCDF file. Please find the NetCDF file attached. I imported it with multiple dimensions and multiple variables using the "Add Multidimensional Raster ...
  • 325
0 votes
1 answer
216 views

Aggregate polylines in JavaScript (Leaflet)

After executing a certain amount of routing calculations, I have a list of vehicle routes as shown in the image below. Now I have added an opacity to these lines to visualize the frequency of certain ...
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