Questions tagged [3d]
Questions related to GIS objects that have three dimensions.
675
questions
1
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1
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24
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How to tell if a layer is Z-aware or M-aware
I am trying to detect if a layer is Z-aware or M-aware. If it is, I need to flag it to be reconfigured without Z/M-awareness.
In the example below, I have already pulled down the layers and am ...
- 13
2
votes
0
answers
43
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 ...
- 335
3
votes
1
answer
80
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" ...
- 31
0
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0
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13
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Cannot set my DEM in ArcScene to 3D
I read other responses saying that DEMs will automatically appear as 2D, but you need to drape your DEM over itself. Those instructions included opening the properties and clicking on the Base Heights ...
- 1
0
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0
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45
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Export 3D data from PostGIS to any common open and standardized 3D file format
I am mainly curious, because I found this function: ST_AsX3D() in the list of PostGIS 3.2 "ST_As{something}" functions:
st_asbinary, st_asbinary, st_asbinary, st_asbinary,
...
- 6,788
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0
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54
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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 ...
0
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0
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171
views
BlenderGIS: georeferencing and exporting 3d model?
I can add a georeferenced basemap using BlenderGIS and overlay my 3d model on this basemap.
I want to export this 3D model as a georeferenced file, but only see a shapefile export option (which cannot ...
- 85
0
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1
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40
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Creating polygons that follow the curvature of the Earth in ArcGIS JS
I am trying to divide a globe into equally sized squares and render them using ArcGIS JS where the rendered polygons follow the curvature of the earth.
So far, I've made an algorithm to divide a ...
- 51
2
votes
1
answer
59
views
Selecting elevation band for QGIS 3D view
The Terrain panel of the 3D configuration window allows selecting "DEM" as the type then selecting a layer for the elevation data, but it defaults to using the first band of that layer for ...
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0
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36
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Automated georeferencing 3D (multipatch) geometry in ArcGIS Pro?
After importing a 3D Collada (.dae) file using the "Import 3D Files" tool, I need to georeference it using the Edit tools (move, rotate, and scale). This is a tedious and error-prone process....
- 85
0
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1
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43
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Writing PolylineZ shapefile with pyshp [closed]
I am trying to write a POLYLINEZ file in Python with pyshp and find the documentation lacking... When importing a POLYLINEZ shapefile, the x,y values are separate from the z values. (sf.shape().points ...
- 3
0
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1
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55
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Extracting above-ground part from Multipatch buildings with ArcGIS Pro?
I have a lot of 3D buildings in Multipatch format (the grey features in the screenshot) and need to extract the building parts above ground.
I thought it should be possible to interpolate 2D buildings ...
1
vote
1
answer
216
views
French point cloud data won't render properly in QGIS 3.22.3
A question to the 3-D literate QGIS crowd: I downloaded .laz files from the French LiDAR data portal (https://geoservices.ign.fr/lidarhd#telechargement) and can't get it displayed in QGIS 3.22.3 (...
- 97
2
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0
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73
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 ...
- 311
3
votes
0
answers
242
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 ...
- 141
1
vote
0
answers
31
views
v.to.3D failing in QGIS
I'm trying to use v.to.3D in QGIS to create lines with proper elevation so I can export it to DXF. However, I'm running in to some issue when using v.to.3D. When googling I have seen others asking the ...
- 11
0
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149
views
Converting GeoTIFF to 3D shapefile?
I have a GeoTIFF in which the data represents flood heights. I want to create a 3D vector that shows the flood heights from the GeoTIFF.
Please suggest any methodologies/tools if this is possible.
1
vote
1
answer
51
views
Why does OSGEO/OGR add a third dimension to my 2D geometry?
When I instantiate a new wkbPoint geometry and give it only two coordinates, I expect it to be specifically 2D. However, a third coordinate automatically gets added as 0. See my code below:
from osgeo ...
- 1,767
9
votes
2
answers
353
views
Creating ellipse around line in 3D space using R
BACKGROUND:
A similar question has been asked before, but not answered; see Creating ellipse around line in 3D space using PostGIS. I am a new user asking this question but hopefully with more details....
- 161
0
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1
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88
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QGIS 3D Animations sequential photos to video
The 3D save animation function output in QGIS (3.16) is a set of sequential photos.
How do I transform those images to video?
I tried converting to GIF but the file was too heavy.
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1
vote
0
answers
66
views
What could explain the bizarre discrepancy in the geometry between these two 3D maps?
GPS location: 33.67619789331771, -117.68029382324094
MapBox GL JS screenshot:
Google Maps screenshot:
What could explain this?
It should be noted that, for the places I actually know in real life, ...
- 29
2
votes
1
answer
367
views
Calculate angle between two 3D points [closed]
Given two points with xyz-coordinates, how to find the angle between them as shown in the picture. Is there a tool for it in ArcGIS Pro? I have looked into PointGeometry, but it did not seem to have ...
0
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0
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20
views
Improve ALOS World 3D vertical precision with GPS data from fieldwork
I'm working on sport topo maps in Russia, european part (Pskov region, near Estonia/Latvia border), typical map is from 1 to 10 km2 in size. The most precise source of DEM for generating relief lines ...
- 101
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0
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12
views
Creating TIN has failed ? for 3D visualization of DEM
My DEM size is 100MB.
z values ranging -> low -73 and high 1036
When I am trying to convert raster to TIN following inputs were provided
z tolerance and z factor as 1 and Maximum no of points ...
0
votes
0
answers
35
views
Creating 3D base for map (like extrusion into negative) using ArcGIS Pro
Using ArcGIS Pro 2.8, I created a raster of a 120x120 m forest quadrat, and projected it onto an elevation surface containing elevation data for the quadrat. I now want to add a 3D base to the map, to ...
- 1
0
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0
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102
views
COLOR_RGB("R","G","B") doesn't colour points of a 3D billboard in QGIS?
I have a shapefile made from a text file:
X Y Z R G B
It defines a vertical plane of points (see image). Usually (in standard symbology) I can use the function "COLOR_RGB("R","G&...
- 31
0
votes
0
answers
56
views
How to get data/coordinates from Mayavi 3D plot by mouseclick on any point in the plot
I have used a Digital elevation model, to create a 3D model of a terrain using Mayavi mlab. My next task, is to be able to get coordinates of any point that I click on the 3D model. Once I get the ...
1
vote
1
answer
144
views
Making 3d layer Symbol transparent in QGIS
I want to display a 3d symbol (from .obj file) yet make it of single transparent color. How to do such a thing in QGIS 3.22 or later?
Can one inherit a Material class say from python for example and ...
- 77
0
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1
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102
views
Render 3d view using EarthEngine using parameters like in EarthStudio to simulate real environments
In Google Earth Studio, it is possible to create animations on Google Earth using 3d imagery using the following parameters: latitude, longitude, altitude as well as camera pan and tilt. This means ...
0
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0
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15
views
Losing raster edges in 3D map
I am using the 3D map viewer in QGIS. When I change from flat terrain to DEM, I'm losing some parts of the DEM tifs.
The image appears like this:
When it should appear like this:
You can see some ...
- 1
0
votes
0
answers
26
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 ...
0
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0
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116
views
ESRI multipatch file to 3D file
I have almost zero experience with GIS, but I'm trying to convert a 3D map into a 3D file I can work with (like STL, OBJ, FBX, COLLADA, 3DS, etc). This is the dataset (and if possible, I would want to ...
- 153
1
vote
1
answer
258
views
How to turn raster of RGB points to elevation map?
I have a 2d RGB raster image
It has points with RGB in each point, Black background. It is a form of a depth map.
I want to turn it into elevation points: turn RGB data from channels into XYZ data. I ...
- 77
3
votes
1
answer
660
views
QGIS does not show 3D models with textures in 3D map view
The problem
When I load 3D models (Wavefront .obj files) to QGIS 3.22 on Win10, they show up correctly in 3D view, but only when Shading is set to Realistic (Phong) or CAD (Gooch). When I select ...
- 41.9k
2
votes
0
answers
17
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"...
- 21
0
votes
1
answer
1k
views
Extracting building footprint from OSM or Satellite imagery using QGIS [closed]
I am trying to extract the building footprints from satellite imagery or from OSM using QGIS.
In ArcGIS it is a straightforward task however, I don't know how to do it in QGIS. I need to recognize the ...
- 19
1
vote
1
answer
52
views
Check if Geometry Arcpy Object has z values
I need to know if an arcpy geometry object has z values.
I have tried without success to use the has_z attribute, since to create them you must use and I have also tried to verify if the first point ...
- 63
0
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0
answers
99
views
Getting ArcGIS Pro's default elevation data (z-value) as layer
ArcGIS Pro displays coordinate values and z-values (elevation) as part of its basemap when moving the cursor across a 3D scene. This information is supplied by the WorldElevation3D/Terrain3D elevation ...
- 1
6
votes
1
answer
1k
views
Convert GPS coordinates into 3-dimensional cartesian coordinates (x,y,z)
In a nutshell:
What is a valid EPSG code for an earth fixed 3-dimensional cartesian coordinate system?
If it is 6500: How can I trick the python library pyproj into using this 3D coordinate system ...
- 191
2
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0
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249
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 ...
- 21
3
votes
1
answer
377
views
Calculate 3D area with an DEM in QGIS
I have a lot of my projects that are located in mountains. When I draw my polygones, I can easily calculate $area, of course. But in many cases, I underestimate the surface of my polygons due to the ...
- 715
1
vote
1
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30
views
Setting expression for two different table attribute to store as default style
I'm new on QGIS. I would like to store a default style in geopackage use by two different table attribute. First table with "building_height" , and second table with "block_height"....
- 13
1
vote
0
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59
views
Create PolygonZ from LineStringZ in PyQGIS
Is it possible to create a 3D polygon in pyqgis without using the processing tool LinesToPolygons?
I'm trying to convert a LineStringZ object to a PolygonZ object, but the API only accepts 2D ...
- 83
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0
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20
views
Output of 3D Symbology or 3D Objects to KML
I have tried various options and I am not able to find out how to export 3D Symbols out to KML if it can be done!
I have tried 3D Models in dae, tried 3D Primitives such as Spheres, Cubes, etc. Can ...
- 1
0
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0
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64
views
Creating animation using ArcGIS Pro for Empirical Bayesian Kriging 3D layer
I am using ArcGIS Pro.
Is there a way to create an animation showing Depth Ranges and the range of the interpolated data for Empirical Bayesian Kriging 3D layer just like when I play the Slider on the ...
1
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0
answers
53
views
How to invert LAS files
I have a bunch of LAS files which are supposed to show data underwater but the depth (z) is poisitive rather than negative so they are inverted. I'm looking for the fastest way to invert/flip them on ...
- 1,876
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104
views
PDAL: how to create valid glb?
I'm attempting to create a glb model from a cropped laz file, using Python. The glb file is created successfully, but any reader (Blender, ThreeJS, online gltf validator) returns errors like:
Bad glTF:...
- 4,613
1
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113
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 ...
- 41
2
votes
1
answer
241
views
Intersection of an arbitrarily oriented 3D plane with a terrain DEM
In a nutshell
I'd like to compute the intersection of a 3D plane (defined by 3 points) and a terrain (given as a raster DEM GeoTIFF), and more particularly the part between two lines of that plane.
...
- 6,788
0
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0
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29
views
How can I visulize a spherical texture map on a 3D globe?
Imagine I create a 3D texture map. Let's say I'm flexible as to how exactly it's represented on disk, the point is I have something that assigns a number or RGB triplet of numbers to every point on a ...
- 131