Questions tagged [3d]

Questions related to GIS objects that have three dimensions.

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14 views

QGIS point clouds: hide flat pane in 3D view

After successfully loading .laz point cloud data to QGIS 3.18 on Win 10, I am able to show the data in 3D view. However, the data is visualized twice: once as a flat pane with the same symbolization ...
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20 views

Determination of the maximum distance of a 3D polyline from the DEM (raster) [closed]

I have numerous 3D polylines of which I would like to determine the maximum distance (at any point on the line) from a DEM. So far I have implemented 2 possibilities, but they did not prove to be ...
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1answer
29 views

Does the $length function in QGIS field calculator support LinestringZ?

I have a shapefile with a MultilinestringZ geometry type that I created using the grass v.drape function to attach z-values from a DEM. In order to calculate the 3d length of a line segment, can I use ...
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1answer
11 views

How to output 3d geometries via grass plugins v.drape, v.to.3d in qgis?

When I try to process either a 2d Linestring or a 3d MultilinestringZ vector through the v.drape or v.to.3d processing tools in qgis, I get an error stating that it is outputting a 2d geometry instead ...
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17 views

Program to generate 3D polygon slope

What I am trying to do is create, or find an open source program that can generate a 3D shapefile based off of a line that has a predetermined slope and distance. For example. I draw a line at the ...
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14 views

Export from scene layer in ArcGIS Hub to file 3D

I want make 3D model using 3D buildings and trees from this layer: https://hub.arcgis.com/datasets/esrinl-content::3d-bomen-rd-1 There is any way to export a part from that scene layer to a 3D file? I ...
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33 views

Calculate intersection of two 3D vector polygons

I have not found a solution yet to intersect two 3d vector layers. The solution is to calculate the intersection of the two polygonal 3d surfaces. Does anyone know a solution to intersect two vector ...
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20 views

Convert a 3D model from Blender to .obj [closed]

I have created a 3D Model in Blender by using a DEM and displacement modifier. I know how to render and get an image, but my question is how I can export it as a .obj so that can be embedded in ...
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27 views

Linear Referencing and Z measurements

I am trying to build a linear reference route that uses the DEM derived distance instead of the default 2D distance. I have tried this How To (https://support.esri.com/en/technical-article/000008984) ...
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1answer
36 views

Cesium toggle 3D buildings on/off

Does anyone have a working code example of how to toggle 3D buildings on/off in Cesium? Since the 3D OSM buildings in Cesium are solid, everything beneath them is obscured so I would like to add an ...
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30 views

Does ESRI ArcGIS API for JavaScript support vector tiles with fill-extrusion Style Property?

ESRI ArcGIS API For JavaScript’s support GL JSON Stylesheets/Vector Tiles that use fill-extrusion property? https://docs.mapbox.com/mapbox-gl-js/style-spec/layers/#fill-extrusion { "id": &...
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23 views

Making raster layer 1 meter high using ArcGIS Pro

I have 30 raster layers of the subsurface. Each representing the subsurface 1 meter below one another. I would like to have a 3D view of this like voxels. Each layer must have an artificial height of ...
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21 views

Getting 3D shapefile into 3D view using QGIS

Despite trying and following several guides/tutorials (and CRS types) I am unable to get a 3D .shp into QGIS 3d view - all i can get is a flat plane with no z values and .shp projected in 2D. The same ...
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23 views

import pyvista / VTK make QGIS crash

I'm trying to port 3D rendering into QGIS through VTK/pyvista renderer. Everything works fine ... untill I quit QGIS. There vtk QGIS crash, but I can't figure out why ... I've issued the problem at ...
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17 views

Having trouble viewing DEM in 3D view

I am trying to view my DEM of terrain for a project in the 3D viewfinder, but having some difficulty. I can see it as flat terrain, but when I turn on DEM for the interpolation it disappears in the ...
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1answer
37 views

Viewing 3D shapefile in QGIS

I have 3D shapefile which displays fine in QGIS 2D (and 3D in ArcScene), but I am having trouble changing to 3D view in QGIS. Shapefile is an imported polygon set (in a local CRS) > I get the ...
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62 views

Converting .obj 3D files to .tiff raster (or reading .obj on QGIS)

I received a 3d terrain model captured with a drone in .obj format. I am trying to open it in QGIS to use the elevation information as a georeferenced raster, but so far I can't open it or transform ...
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0answers
28 views

Communicate with QGIS 3D view via PyQGIS?

I want to automate setting parameters for the QGIS 3D map view window in my project, presumably using PyQGIS. For the standard 2D map canvas, I can access iface.mapCanvas and use its various methods, ...
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9 views

Spatial Join 3D point datasets: Ecological Marine Units (EMUs)

I have a global set of sampling points (N = 500+) that I would like to attribute with the Ecological Marine Unit (EMU) classifications near which they fall. The EMU dataset and my sampling dataset are ...
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25 views

Generate buildings polygons

I'm doing a project for a city that has little database. I would like to know if it is possible to generate polygons of existing buildings and 3D of them from a Google Earth map in QGIS?
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30 views

Setting the 3d view function for a polygon layer

I am trying to create a 3d model of an archaeological site on QGIS. I had some contourlines, I made them polygons using the "polygonize" plugin and I categorized the polygons with a colour ...
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18 views

Using exterior orientation parameters to calculate 3D similarity transform

Given a solution from relative orientation (X,Y,Z, kappa, phi, omega) for two images (model coordinates) and exterior orientation parameters for two images from GPS/IMU (X,Y,Z,kappa,phi,omega) (object ...
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92 views

Cesium Terrain generated using DSM is way higher than the base map

Is there any way I can clamp the terrain to the base-map's height? Is the problem with the vertical datum for the data. I tried changing ellipsoid's radius-- but I learnt that the height is relative ...
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22 views

R: extract z-value from 3D Multipolygon

I have a dataset with multipolygons that have a z-value, meaning they are three-dimensional. I read the dataset with sf::st_read(), so my dataset is in simple features format. This is my polygon: ...
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1answer
40 views

Multiplying z values in linestringz shapefile with a constant [closed]

I have National Levee Data (NLD) shapefile for the entire US in a linestringZ format. The unit of Z values in the shapefile is in feet, but I need it in meters. So, I want to multiply all z values ...
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1answer
59 views

PostGIS validate the Z continuity

What is the solution to validate if a 3D linestring is always going down? All linestring nodes must have a lower value than the previous one, to check if Z values in a line are going down continuously ...
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20 views

QGIS, 3D-view, Time Manager Plugin. How to update 3D-view automatically?

I have a set of polygons with values, and time information. I am able to set Time Manager plugin to work with the values also with 2.5D view. So every year with new value for polygon I have a higher ...
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1answer
172 views

How do you export a 3d-model in QGIS to a file that can be read in Rhino?

I am really new to QGIS and haven't really gotten familiar with all the functions yet. I've made a 3D map/model in QGIS, and would like to export this in a file format so that I can use it as a ...
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35 views

Rendering hill shade after texturing it

Does anyone know if it's possible to: make a hillshade, render it with blender go to Photoshop and place a layer on top of it [like a tint, color bands, or terrain data] and then render it once more,...
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33 views

Merge two adjacent polygons in a 3D space [closed]

Given two three-dimensional polygons that are both in the same winding order (counter-clockwise order or in clockwise order): poly1 = np.array([[120787.075999871, 491779.675000143, -2.0699999332428], [...
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180 views

Error: shape mismatch when plotting certain DEM Geotiffs in 3D - using 'plot_surface' from Matplotlib

I'm trying to plot various DEM geotiff rasters in Python 3.7 using plot_surface in matplotlib but encountered an error that I can't solve. I have 2 DEM rasters, the small one plots correctly, the ...
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0answers
29 views

QGIS Linear Z interpolation on snapping

The interpolation of the Z value when snapping in the creation of a new feature is done well in QGIS 3.14, but when editing elements this does not happen. Is there any way to do it?
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1answer
259 views

.b3dm to regular 3d model converting

I have never been using Cesium but recently found a web storage with multiple *.b3dm files. It looked like they represent buildings that could be helpful for my company. However I could not see if ...
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1answer
19 views

Raising a point layer off the ground

I am working with a layer of potential sites for security cameras and I want to create a viewshed from each potential site. I have a point layer of XY data that shows the location of each camera, but ...
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1answer
63 views

Sharing QGIS 3D visualization

I am using QGIS to create 3D visualizations using plugin "Qgis2threejs Exporter". My goal is to share this with others. Right now it runs fine on my computer browser. How do I make it "...
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69 views

QGIS export 3d view / vector layers of 3d model to cad/blender friendly format

I am loading vector layers in .gml format that create 3d models on a map. I'd like to save that model out of those layer using either 3d rendered map or other method. Is it possible, and If so, how?
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21 views

Converting 3D kml files to 3D Shapefiles using ArcMap without 3D Analyst

How do I convert 3D KML files to 3D Shapefiles using ArcMap without 3D Analyst? I currently do not have access to 3D analyst. I am using ArcGIS Desktop 10.4.1. We are migrating from Google Earth EC to ...
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0answers
82 views

Converting .OBJ to .CTM file using openctm

I would like to convert a 3D .OBJ (Wavefront OBJ file) file to .CTM (OpenCTM 3D mesh file) format. I know that openctm API (http://openctm.sourceforge.net/) have both Python and JavaScript ...
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0answers
17 views

OBJ file not loading in GIScene.js

I am trying to load a OBJ file in GIScene.js. Unfortunately, the OBJ file is not getting visualized inside scene of GIScene.js, even though the scene of GIScene.js is getting visualized. There are no ...
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1answer
71 views

How to turn a 3d model made in Qgis2threejs into a shareable file

I have made a 3d model using Qgis2threejs, I can open the viewer in my browser and it works fine. I want to be able to provide someone with a link to the viewer, rather than have to send them an html ...
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1answer
40 views

How do I overlay points/polygons in a 3D map using QGIS2threejs?

I am trying to produce a topographical map of an area, but I need my points to sit on top of it. I have created the actual 3d rendering in QGIS2threejs, and I can see the option to include points, but ...
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0answers
64 views

QGIS 3.12 won't open new 3D Map View

I have a DEM that I'd like to render in 3D using QGIS 3.12. Various tutorials tell me to click on view>3D map view to do this. However, when I do this no window or anything pops up. If I go to View&...
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14 views

Cesium: How to retrieve the UUID of the building model onclick?

I have 3D building models, being loaded via JSON with gltf format. I would like to retrieve the individual model's uuid when the user clicks on the building.How can I do it on cesium platform? Example ...
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1answer
508 views

Unable to load .glb (GLTF) in a scene of GIScene.js

I would like to load a .glb file, which is the binary format of GLTF in a scene of GIScene.js (https://giscience.github.io/GIScene.js/). <html> <head> <meta charset="UTF-8&...
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0answers
11 views

3D model with added annotations for phone app

This might be too broad of a question; I have some 3D models that I am viewing in CloudCompare. I can add a label to a desired point by using shift + right click and then change the title of the point ...
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0answers
74 views

Placing a label above a feature in 3D/Scene using ArcGIS Pro

Is it possible (using ArcGIS Pro, 2.5.1) to manually or by derived extrusion (i.e. from a DTM) set the height of a label to sit/float above a feature? I see you can use an extrusion but that requires ...
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0answers
44 views

Problems with QGIS 3D animation in Windows

When I use the 3D map view in QGIS 3.10 on Windows 10 and animate a map all the pictures turn out black. I can click the export button and get an actual picture. I have reformatted the computer and ...
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2answers
124 views

QGIS 3D - no terrain altitude binding for polygons / buildings

My first post to this topic: QGIS 3D - no terrain altitude binding There I have had problems with 3D objects from a point layer. I solved this. Now I have a problem with 3D objects from a polygon ...
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2answers
96 views

Create points along 3D stream where elevation changes by 1ft

Using ArcPy (Python 3), I am trying to create points along a line where the elevation changes by 1 ft between vertices. I can successfully convert my Stream Polyline feature class to 3D and create a ...
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0answers
27 views

3D variography: rotation matrices for multiple angles support

I'm currently working on a 3D variogram algorithm based on geostatsmodels (which only handles 2D datasets). I'm having a hard time understanding how to have rotation along the z-axis for azimuth ...

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