Questions tagged [3d]

Questions related to GIS objects that have three dimensions.

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Calculate volume of space defined by multiple overlapping 3D polygons

I have thousands of 3D polygons scattered in space but they mostly overlap with many of their neighbors in big extent. Is there any way how to compute volume they define effectively? I would love to ...
vildead's user avatar
  • 231
6 votes
0 answers
117 views

Acquire ground coordinates of target while doing aerial survey (airplane or helicopter)

The Problem: Each year I board a small airplane and look for diseased individual trees while flying transects over the forest I help manage. The current method for marking a tree's location is ...
jholmes's user avatar
  • 61
6 votes
0 answers
2k views

Displaying cross sections/3D volumes in QGIS 3.X

Is there is a way to display vertical images (cross sections) in a 3D view window in QGIS 3? I want to display some cross sections underneath a geological map overlain on the topography. I can do ...
8556732's user avatar
  • 301
6 votes
0 answers
1k views

How to set Vertical Coordinate system when creating a 3D shapefile?

I'm working with GDAL v1.11 and am seeing the vertical CS stripped when exporting a 3D shapefile (from oracle spatial). This is the command I'm running: ogr2ogr -f "ESRI Shapefile" B_POINT.shp (...
Russell's user avatar
  • 61
5 votes
0 answers
56 views

Styling Polygons in 3D View as in 2D View in QGIS

I have a sample set of polygons as shown in the picture below: How can I keep the same symbology in 3D view instead of the grey metallic color ? I am not sure how to achieve that.
GforGIS's user avatar
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5 votes
0 answers
5k views

Importing .obj-file in QGIS 3.10.5

I wonder if it is possible to simply import .obj and .jpg (texture) files in QGIS and implement them in an existing map. I found this answer QGIS, point clouds and photogrammetry but it isn´t exactly ...
wild5four's user avatar
5 votes
0 answers
290 views

Fixing buildings that do not appear in 3D using Mapbox gl js?

I'm trying to adopt this Display buildings in 3D example, but I found out that in my city (Minsk, Belarus) some buildings look flat like this: The coordinates of this particular building are 27....
Anton's user avatar
  • 151
5 votes
0 answers
188 views

Sphere rendering inside out using QGIS on Ubuntu?

I'm trying to use QGIS to show earthquakes around a 3d globe. I changed my CRS to 'Sphere_Van_der_Grinten_I' and it rendered like this: Here's a report from Hardinfo on my system and display: ...
JCMontalbano's user avatar
5 votes
0 answers
2k views

Using GRASS GIS/QGIS to georeference TIFFs in 3D space, vertically?

I am a geophysicist working for a small shallow surface geophysics firm. We create 2D slices of the ground showing data collected from various surveys. These are generally cross sections (TIFFs) of ...
Toby Child's user avatar
4 votes
0 answers
500 views

Visualize 3D polygon and TIN stored in postgis

How can we visualize 3D polygon and TIN data stored in POSTGIS? My input is 3D mesh data generated by AR application. I have created polygon by adding all the vertices of an object. I can visualize my ...
fastRunner's user avatar
4 votes
1 answer
397 views

Generating regular points on 3d polygon surface?

I have some CityGML buildings and I imported them into postgis database using 3d citydatabase. I want to generate points on buildings surfaces just like in the shown image. Building surfaces are ...
user51044's user avatar
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4 votes
0 answers
167 views

Improve 3D bounding box query on large set of lines (Postgres 9.5, PostGIS 2.3)

Problem: We use Postgres 9.5 and Postgis 2.3 to store about 6 million lines/edges in a 3D space and use an axis aligned bounding box to find all intersecting (and included) lines. This works well, but ...
tomka's user avatar
  • 171
4 votes
0 answers
822 views

Can I intersect (slice) a multipatch geometry and obtain the perimeter line of the intersection as a result?

Can I intersect (slice) a multipatch geometry with a vertical polygon (or an extruded line) to obtain the perimeter line of the intersection? (or better yet a polygon) I am creating fairly complex ...
Jakub Sisak GeoGraphics's user avatar
4 votes
0 answers
178 views

Three Dimensional Routing Input Location Errors and Questions, ArcGIS10

I am having a bit of a problem with my three dimensional route solving. I am creating an interior building network, and ideally would be routing from room to room. I created a line feature class, with ...
eric's user avatar
  • 801
3 votes
0 answers
86 views

PostGIS 3D buffer along an axis

TL;DR In PostGIS, I'm searching the most efficient way to compute a 3D geometry extruded along an arbitrary axis given as a LineString Z in space (each coordinate varies along the axis). Explanation ...
swiss_knight's user avatar
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3 votes
0 answers
211 views

3D globe on QGIS 3D view

I am using QGIS 3.22. Is there a way to load a 3D globe model into the 3d view in QGIS so I can turn it around and etc. like Google Earth? If it possible where can I find or how do I create something ...
YuvalM's user avatar
  • 399
3 votes
1 answer
355 views

Area calculation for non-planar surfaces

I am looking for a way to calculate the area for a big set of 3D-surfaces. I know, that some of those surfaces are slightly non-planar, which means that the coordinates got somehow "rounded" ...
e.g's user avatar
  • 31
3 votes
0 answers
720 views

3D buildings from OSM data for historical interaction

What I am trying to do: Have a 3D interactive map, embedded on a website, that allows viewers to click on buildings which opens up a 'more info' HTML overlay with links/text/images about that specific ...
essexboyracer's user avatar
3 votes
0 answers
146 views

QGIS 3.12.3: V.to.3d: Number of centroids exceeds number of areas

QGIS.3.12.3 | CRS = WGS 84 | Grass downloaded Making a habitat survey map 3d using height values stored in attribute using v.to.3d. Parameters Name of vector map: Habitat layer Input feature type: 4 ...
Jade's user avatar
  • 61
3 votes
0 answers
223 views

QGIS C++ 3D Map Scene

I want to use QGIS with c++ api like ArcGis runtime sdk. I tried to use Qgs3DMapScene class like QgsAbstract3DEngine *m_window3DEngine; Qgs3DMapSettings *m_mapSettings = new Qgs3DMapSettings; ...
barber's user avatar
  • 41
3 votes
0 answers
236 views

3D map view in QGIS with .grd format bathemetry data

I am attempting to use the 3D map feature available in QGIS3 for viewing bathymetry data. These data are in .grd format, but I’ve also tried using data in GeoTiFF format with no luck. The 3D map ...
acquisto2's user avatar
3 votes
0 answers
182 views

How can I take a 'Slice' out of a 3D model using QGIS?

Subject line may not be the best description of what I'm trying to do. Basically I want to take a 3D model of a group of buildings and either remove all points above a certain elevation, or ...
TechJaz's user avatar
  • 51
3 votes
0 answers
146 views

Splitting 3D Spheres with 3D Walls (lines converted to 3D) in ArcGIS for Desktop?

I am using ArcGIS 10.3 for Desktop. I would like to split spheres (created from 3D buffers) in half using 3D fences/walls (lines converted to 3D). Both datasets are multipatches. The purpose of ...
GISPaese's user avatar
3 votes
0 answers
274 views

3D model to DEM, maintain volume?

Bit of a challenge here which I've been grappling with for some time. I'll explain my full work flow so you can reproduce if needed. I'm creating virtual landscapes in Google SketchUp which I ...
Beeman's user avatar
  • 81
3 votes
0 answers
585 views

3D interpolating

Our final year project domain is soil contamination modeling. We collected soil samples at the depths of 0.3 cm ,0.5cm , 1cm , 1.5 cm in about 25 locations. We considered 8 contaminants- p h, sodium, ...
Lydia Sitharthan's user avatar
3 votes
0 answers
3k views

How to set up a base station without known coordinates

I am new to surveying, but need to set up a Topcon controller with Pocket 3-D to run 2 receivers and a grader running off the base receiver for my new job. It sounds stupid, because I can't seem to ...
Rachael63's user avatar
3 votes
0 answers
268 views

Incorporating known GPS/INS data to automatically produce geo-registered 3D models

I am trying to reconstruct a 3D building model from 2D video frames using an open-source Structure-From-Motion(SFM) software (Bundler). The final reconstructed 3D model will be in Cartesian ...
Ken Toh's user avatar
  • 255
3 votes
0 answers
418 views

Layer 3D to Feature Class Empty Output

I'm trying to build 3D buildings from 2D footprints. I extrude by the building heights, and input the surface by editing the properties. From here I use the Layer 3D to Feature Class tool to convert ...
endless's user avatar
  • 51
2 votes
0 answers
90 views

Keypoint generation in 3D point clouds with Deep Learning

I have a huge dataset of 3D point clouds (each point consists of X,Y,Z coordinates) and another dataset with keypoints (also X,Y,Z) which lie on quite recognizable structures in the point cloud. As a ...
nmb's user avatar
  • 21
2 votes
0 answers
179 views

Convert a PostGIS 2D polygon to a 3D Polyhedralsurface using C#

I'm trying to convert a 2D polygon into a 3D polyhedralsurface because i will use the surface to do a Intersect with other 3D geometries. The problem is when im trying to create the surface from a ...
Jacob Christiansen's user avatar
2 votes
0 answers
301 views

Seeking Python library to check validity of 3D polygon

In the case of 2d polygons I have been using shapely: from shapely.geometry import Polygon Polygon(points).is_valid But for 3D polygons, shapely simply computes the validity in the x-y plane as ...
jlcv's user avatar
  • 345
2 votes
0 answers
54 views

Connecting points with Z values to lines where the Z values are retained in the nodes of the resulting line

I have interpreted seismic data as xyz-points (about 23 cm lateral resolution). They are not really ordered but rather a simple list of coordinates. One file contains multiple seismic "lines"...
Sascha K.'s user avatar
2 votes
0 answers
702 views

How can I create 3d trees in QGIS

Has anyone had any luck creating 3d trees in QGIS? I want to create a visualisation of a mixed forest stand for woodland creation proposals, but I'm not having much luck with 3D modeling. Are there ...
AMartinEJD's user avatar
2 votes
0 answers
50 views

3D transformation of local points

I was wondering if anyone could assist me with a problem. Undertaking some archaeological excavations we use a laser level as a datum to take heights or Z values, the laser level is free floating and ...
AustGIS's user avatar
  • 21
2 votes
0 answers
105 views

Can I add 3d models on maps in QGIS?

I need to overlay 3D models of buildings I have designed in a separate CAD software. I want to add .stl or .obj files with proper scaling on the 2D map on qgis so that I can make a 3D map with 2D base ...
pulkit's user avatar
  • 29
2 votes
0 answers
43 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) ...
Clive's user avatar
  • 21
2 votes
0 answers
54 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 ...
Nick 's user avatar
  • 21
2 votes
0 answers
601 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 ...
frozenOne's user avatar
  • 121
2 votes
0 answers
958 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 ...
GIS_py's user avatar
  • 483
2 votes
1 answer
918 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 ...
SPG's user avatar
  • 191
2 votes
0 answers
776 views

Converting Points shapefile to 3D polylines in QGIS (without Grass)

I'm using QGIS 3.10 and am trying to come up with a way to create a shapefile of polylines with Z attribute attached, starting from a points shapefiles. Both Saga/Convert Points to Lines and QGIS/...
Seb's user avatar
  • 21
2 votes
0 answers
116 views

Separating ("high enough") trees from "lower height" vegetation? In abstract (non-RGB) .xyz point cloud

Suppose I want to select trees that are "high enough", but the data contains other vegetation, like bushes and smaller trees. My data is abstract (non-RGB) .xyz point cloud. I.e. there's only ...
mavavilj's user avatar
  • 215
2 votes
0 answers
1k views

3D map view doesn't work in QGIS

My 3D map view in QGIS goes blank when I try to drape over a DEM raster. All the data appears fine in the "Flat terrain" view but the desktop goes white when I change the Terrain Type to DEM. And ...
Mikeoramma's user avatar
2 votes
1 answer
1k views

Generate Cesium 3-D tiles from shapefile with FME

I'm trying to generate 3-D tiles from a shapefile. Just simple shp reader directly to Cesium 3D tiles writer. It does generate files, but after uploading them to Cesium Ion it does not work. It can'...
ksensei's user avatar
  • 21
2 votes
0 answers
517 views

Displaying rendered layers in 3D Maps in QGIS 3.8.x with variable transparency/opacity

I am looking at using QGIS to help facilitate conversations/do some thinking in 3D. I have tried both QGis2threejs and the native 3D Map available in QGIS 3.x and both have their strengths. The ...
Hamish's user avatar
  • 21
2 votes
0 answers
52 views

Contour Polygons to 3D

I am trying to make a 3D representation of the map below. I have 3 polygons which represent contour lines. It starts at 0ft for the outside polygon, 10ft in the middle and 20ft for the very center ...
craustx's user avatar
  • 21
2 votes
1 answer
1k views

Exporting Georeferenced Models from Meshlab?

I am struggling to understand Meshlab's and 3D mesh file's relationships to georeferencing. I am coming from a GIS background, so I believe my assumptions on how this should work are preventing me ...
Matt Bell's user avatar
  • 136
2 votes
0 answers
88 views

Symbolising 2.5D polyline based on slope of each segment using QGIS?

I have a 2.5D polyline (each vertex has an elevation value) of a hiking route. I would like to change the line width depending on the slope of each segment in order to visualise how difficult each ...
TeddyTedTed's user avatar
  • 6,100
2 votes
0 answers
366 views

What would cause a Cesium 3D-Tiles tileset to not even request it's content?

I am generating an I3DM through Python. I know that the I3DM is probably ok, since the 3d-tiles-tools allow me to extract the binary GLTF file from it. However, when I go to render the tileset in ...
Sam Fischer's user avatar
2 votes
0 answers
267 views

Behaviour ST_Intersection of 3D LINESTRING and 3D POLYGON - Z value with GEOS backend

I do not quite understand the behaviour of ST_Intersection applied to 3D geomerties when using the GEOS backend. Take this example: SELECT ST_AsText(ST_Intersection('POLYGON((1 1 1, 6 1 3, 6 4 3, 1 4 ...
SPA's user avatar
  • 21

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