Questions tagged [3d]
Questions related to GIS objects that have three dimensions.
575
questions
1
vote
1answer
39 views
Rendering 3D points in QGIS
I am using 3D map view in QGIS 3.4 and I have point data. On layer properties I have enabled 3D Renderer but the billboard rendering to point option does not seem to be there.
Does anyone know where ...
1
vote
0answers
25 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 ...
2
votes
0answers
31 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;
...
0
votes
0answers
27 views
Rendering 3D images from 2+ imagesets + DEM in QGIS
The most general way of rendering a 3D model in QGIS is by using QGIS2threejs. It works by adding a single layer raster-image/orthophoto and exaggerating a DEM, usually a 1 band raster.
Depending on ...
2
votes
1answer
88 views
Different colors on the same polygon in 3D view of QGIS
I have a .shp file with buildings represented as polygons.
My goal is that, in a 3D representation, I am able to have different colors in a single polygon (building) depending on its height. For ...
0
votes
0answers
31 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 ...
4
votes
0answers
31 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 ...
1
vote
0answers
23 views
Generate point of view (POV) image inside Digital Surface Model (DSM) or 3D City model
I'm currently working with DSMs (Digital Surface Models) and user perspective inside that model.
I'm looking for a Python library, which lets me generate a specific view (from the POV perspective) ...
0
votes
1answer
48 views
Adding elevation to shapefile in ArcGIS Desktop
I have a shapefile that's actually a polyline (but it's 200 miles!)
on the other hand I have a SRTM layer with elevation data.
How should I add the elevation data from SRTM layer to the shapefile?
...
1
vote
2answers
87 views
QGIS: Export 3D map in pdf not working
I am trying to export and save a 3D map as a pdf in QGIS 3.10 (using the composer).
I am using the native 3D viewer and I am trying to understand how I can export and save it as a pdf.
I set my 3D ...
0
votes
1answer
21 views
Getting Surface Area on 3D Objects (ArcGIS Pro)
TLDR: I have a 3D multipatch feature class and need the surface area of the facade of the building.
I brought in some data from Revit into ArcGIS Pro, processed it (project it, georef), converted the ...
1
vote
0answers
14 views
Splitting multipatch based on whether features are connected
I am using ArcGIS Pro 2.4.2.
I have an OBJ file of several hundred buildings that, when imported using the Import 3D Files tool, is converted to a multipatch file with a single multipart feature for ...
1
vote
1answer
23 views
What is the best way to create a line of sight simulation raster? [closed]
I have been tasked to create some sight-line simulations for a powerline project. I have several (85) observation points and need to create a simulation of what the view would look like, looking from ...
0
votes
0answers
11 views
pgpointcloud | query points within some distance of 3d line
I'm just starting to play around with pgpointcloud - and have a use case i cant seem to solve...
i am using some simple pdal pipelines to load data into a pgpointcloud enabled database. and that ...
1
vote
0answers
29 views
How to determine if a .obj 3D Mesh file is geo-referenced or not?
I have a .obj file output from OpenDroneMap. But I cannot determine if it is geo-referenced or not. How can I determine that?
2
votes
1answer
63 views
How can you convert between geographic data from and to 3D data in PostGIS?
Is there was a way to convert a geography value to a 3D geometry value (in ECEF, for example), and vice versa? I know how to convert between geography using a 2D projection, but not a 3D reference ...
0
votes
1answer
41 views
Get Z value into attribute table from KMZ
I have extracted GPS data from photos using geosetter, so that I can then import them into ArcGIS Pro as a shapefile. This I can do but when I try to write the XYZ coordinates to the attribute table ...
0
votes
0answers
28 views
Draping model by WMS service in Cesium
I need to show a small territory 3D model on the Globe. I have a pack of orthos and pointcloud covering it. I chose Cesium + Geoserver WMS service to show orthos at a globe. Service imported in Cesium ...
1
vote
0answers
69 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 ...
1
vote
0answers
35 views
Using 3D KML (Line Based) in QGIS
I'll prefix this with stating that my abilities in GIS are lackluster and I'm still learning, it is also my first time doing any 3D work in QGIS.
I have a KMZ file that contains Z Values (Created in ...
0
votes
1answer
24 views
AGOL buildingexplorer. Can't show all the layers of my 3D Models at once, only 1 model at the same time
I have 2 3D models in my scene. I want to show all the layers of these models but for some reason I can only see all the layers of 1 model at the same time. I think it has to do with the building ...
0
votes
1answer
28 views
Assigning a polygon shape to density values
I am pretty new to GIS as a whole. I have a simple flat file in a csv format, as an example:
lat,long,name,val
25,40,abc,10
50,44,def,20
What I am trying to achieve is to assign a 3d polygon in ...
1
vote
1answer
37 views
Adding texture file to QGIS 3D view?
I am trying to visualize a 3D .img file in QGIS 3.6 . I can add the .img file, as well as a .tiff overlay to my map. When I create a new 3D view, I am able to select the .img as the elevation (which ...
3
votes
1answer
130 views
Creating 3D geometry column by combining existing 2D geometry column with “elevation” column?
I want to create a table that contains 3D data.
I currently have 2D data stored as EWKT, which is multipoint geometry in one column, and another column that has elevation from sea level in another ...
0
votes
0answers
20 views
Making feature class of only the Architectural class of a revit file?
I am trying to publish a revit file to ArcGIS Online and I only want the architectural class to publish. Because in here are also some underground foundation which isn't shown in ExteriorShell.
But ...
3
votes
1answer
48 views
3D View is not available in QGIS 3.4
I'm running QGIS 3.4 Madeira on Linux Mint 17. The upgrade to 3.4 seemed to go smoothly, but there is no "3D View" option in my "View" menu.
Is there something else I need to do? FWIW QGIS 3 J's ...
0
votes
1answer
95 views
qgis2threejs window is blank
I have used QGIS2threejs for several years in QGIS2. Now we have upgraded to QGIS3 at work and the plugin no longer works.
The qgis2threejs window is blank and it displays the error “Any 3D objects ...
2
votes
0answers
27 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 ...
1
vote
1answer
80 views
Rotating Polygon in 3D Space as KML for Google Earth?
I'm trying to create this effect in a KML to be displayed in Google Earth. I am writing in KML 2.1 as a reference.
I know it is possible to create a polygon that is circular in appearance, but can ...
1
vote
0answers
66 views
Import raster layer to Potree viewer
I need to import a raster layer into Potree viewer. I don't need to extrude raster by pointcloud. I only need a raster base layer. There is examples with Cesium, but it is too heavy for my task. Maybe ...
1
vote
1answer
49 views
Creating 3D using Qgis2Threejs
I have strange results when run Qgis2Threejs: used Google satelite, SRTM file in format .hgt, projections: 3857 and 4326 but didn`t receive 3D model.
0
votes
0answers
56 views
Converting Cesium3DTileset into LAS or LAZ files
I got the json file and five .b3dm model files from this SandCastle example:
https://cesiumjs.org/Cesium/Build/Apps/Sandcastle/?src=3D%20Tiles%20Adjust%20Height.html
I want to convert them into .LAS ...
2
votes
1answer
103 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 ...
2
votes
0answers
25 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 ...
2
votes
1answer
64 views
QGIS 3.6 3D View: Data defined override (expression) button is missing
I am trying to create a 3D View in QGIS 3.6.0, but the buttons for data defined parameters (e.g., width or height) are missing in the Layer Properties dialog (see screenshow below)
I want to set the ...
0
votes
0answers
102 views
Loading collada into 3D view of QGIS using Qgis2ThreeJs Plugin?
I have been looking at documentation and other posts but cannot find a way to load a 3D model into QGIS.
I Installed the qgis2ThreeJs Plugin.
I have tried to load a collada file in a temporary ...
0
votes
1answer
29 views
Extruding vector using one of its attributes in GRASS?
I'm following this tutorial: https://grasswiki.osgeo.org/wiki/Extrude_2D_polygons_to_3D.
This is what I've done so far (inside GRASS):
- Import a DEM HGT file:
> r.in.srtm input=S23W043.hgt --...
0
votes
0answers
19 views
Creating drawover/flyover effects on 3d map
In the video below, check out the block between 2:50 & 3:35: https://youtu.be/DXHQ3CuY7bI?t=170
I'm looking for the best way to easily replicate this effect. Any ideas? Software to use? Hire ...
2
votes
0answers
108 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 ...
1
vote
1answer
57 views
ST_Force2D in SQL Server alternative? 3D loading problems from QGIS to PostGIS
I am having problems loading a 3D layer from MS SQL Server to PostgreSQL PostGIS database with QGIS. The PostGIS data loader in DB Manager and other import tools in QGIS have problems with 3D export ...
0
votes
0answers
20 views
Merging elevation values of multiple point shapefile
In ArcMap I have thousands of points with elevation values from an aviation route. This route is stored in a multiple point shapefile. I made a polyline shapefile based on the route x, y locations. Is ...
2
votes
0answers
58 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 ...
1
vote
1answer
140 views
Creating 3D image from HGT files?
Is there any command line tool to create a 3D terrain from a DEM SRTM HGT file like this?
I mean, given a camera position, a HGT file and a satelite image.
EDIT 1
First try to adapt mdsumner's ...
1
vote
1answer
83 views
qgis2threejs 2d instead of 3d view
I want only display a simple cube within qgis2threejs as a collada dae file.
I have this cube created with blender.
But the result of the cubes within qgis2threejs are only in 2D.
The file is OK, I ...
1
vote
1answer
57 views
Split 3D polyline at point using QGIS
I want to split a QgsPolyline geometry into two separate lines at a given QgsPoint (by projection onto the line), adding the point to the line as end point of the incoming line and start point of the ...
7
votes
1answer
149 views
Using Z-Values instead of attribute Z?
To locate any vertex, it is spatially described with x and y coordinates - of course. You can also add Z and M values - but what is the advantage to use the Z in the vector instead of a attribute Z in ...
3
votes
1answer
128 views
3-D Terrain effects for vectors in QGIS?
I'm a bit new to QGIS, and making a few maps of roads through mountains. I'm looking to have a 3-D effect within my 2-D map.
I got a DEM, made a hillshade, and blended a basemap over it. Nice ...
1
vote
0answers
39 views
Pictures with isobaths to a 3D Model in a Browser
I have pictures of lakes with isobaths (*). The result should be a 3D model in a browser.
I tried to make a vector image, but this results in a SVG. I can not import it.
How do I make a layer of the ...
0
votes
0answers
21 views
ArcGIS Pro - need to import 3D model then create polygons on 3D model to measure sections for surface area
I am generally new to ArcGIS Pro. I am working on a project using photogrammetry where I am reconstructing 3D models and trying to measure the surface area of different sections of the models. Maybe I ...
7
votes
0answers
100 views
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 ...
