Geographic Information Systems

Questions tagged [3d]

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Questions related to GIS objects that have three dimensions.

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22 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 ...
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15 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 ...
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1answer
36 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.
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11 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 ...
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0answers
12 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 ...
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0answers
24 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
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1answer
35 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 ...
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0answers
21 views

SurfaceArea function of R giving very big unacceptable area for DEM?

I have been trying to calculate DEM area using surfaceArea function of R. It is giving a very high unacceptable erroneous area. I have a 10 m by 10 m USGS DEM file. I read the DEM using raster() ...
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39 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 ...
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1answer
20 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 --...
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18 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 ...
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0answers
24 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 ...
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1answer
32 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 ...
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12 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 ...
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0answers
31 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 ...
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1answer
75 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 ...
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1answer
39 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 ...
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1answer
28 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 ...
6
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1answer
107 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 ...
2
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1answer
85 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 ...
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28 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 ...
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11 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 ...
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0answers
58 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 ...
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0answers
13 views

GRASS GIS - V.VOL.IDW interpolation interpolates same property vertically

When interpolating a 3D raster using v.vol.idw (ref), the vertical cross section show that the properties are the same vertically. v.vol.idw input=GEOMOD_March24@Toronto output=...
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1answer
89 views

Mapbox GL JS/Android: Draw User's 3D Vector Layer of Buildings

Here: https://docs.mapbox.com/mapbox-gl-js/example/3d-buildings/ It's possible to draw 3D buildings by taking advantage of extrusions, however the 3D vector layer source is the Mapbox's underlying ...
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7 views

GRASS GIS - 3D raster, make voxels above DEM NULL (or remove them)

I am currently using r3.out.vtk to export a 3D raster to view Paraview (several million cells). With r3.out.vtk, you can create a 3D raster with a top and bottom, which is fine in itself. However, if ...
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0answers
42 views

eval (@atlas_pagename)

In QGIS 3.6, I'm successfully using the "eval (@atlas_pagename)" option that automates the generation of class maps when data are organized by different fields and making use of the Atlas of the ...
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0answers
17 views

Creating lines from 3D polygons in ArcGIS [closed]

I have a task to Create simple lines from 3D polygons (pipelines created in 3D Modeling program) to operate them in ArcGIS. What tools can be used to perform this?
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41 views

Plotting 3D data using QGIS? [closed]

Has anyone used QGIS to plot 3D data (temperatures profiles at different depths at sea)?
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1answer
110 views

Viewing 3D relationships of layered points and DEMs by displaying absolute height for both in QGIS? [closed]

What are the limits of viewing points and rasters together in QGIS 3D (either in-app or using qgis2threejs) in comparison to ArcScene? Is using GRASS NVIZ the solution? (see end of post) I am using ...
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0answers
31 views

3D Visualization Error

I am having an issue utilizing 3D Visualization. When I access New 3D Map View, the map that shows up is a 2D representation. Seeing this, I navigate to the 3D configuration tab (represented by a ...
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39 views

Interpolate 3D raster with Anisotropy

I am building a 3D geological model for soil deposits. I have two approaches to build a 3D raster. My dataset is about 300k points of bh information with texture and permeability at every meter ...
2
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1answer
36 views

Select tools with 3D geometry?

I'm trying to work with a layer that uses a PostGIS geometry column of 3D polygons, but hit detection seems to be broken when trying to use the select tools. The geometry renders fine, but when I ...
2
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0answers
147 views

Increasing zoom level in 3D View QGIS Desktop?

I would like to increase the zoom level for my mosaic raster image in the 3D View of QGIS Desktop 3.4.4. I made a mosaic out of four raster images downloaded through the STRM-plugin for DEM data. ...
2
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1answer
66 views

3D exporting and Qgis2threejs plugin

I have a .shp-file of some buildings with a sheet in an attribute table of their height. I want to extrude them using a Qgis2threejs plugin, but since a sheet of height is shown as a type of QString, ...
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0answers
22 views

Mapping over 3D imagery

Most 3D visualisation solutions I've seen are drapes of imagery over a surface like a TIN. Is there any open source software out there that can permit viewing of 3D data (e.g. Leica ADS data) and ...
0
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0answers
37 views

Creating 3D Local Scene using pointcloud, DSM, and orthomosaic from Drone in ArcGIS Pro?

I am trying to create a local 3D scene in ArcGIS Pro and display data fro drone flights. I have the orthomosaic from the flight as a .tif, the Digital Surface Model as a .tif, and my pointcloud from ...
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0answers
35 views

Adding 3D GML file in OpenLayers

I have a GML file which has Z values associated. Is there a sample to show this GML file with 3D in OpenLayers?
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1answer
61 views

Generating 3D surface between 2 linestrings using PostGIS?

I'm trying to create a surface with a slope between 2 circles, i.e. one large external circle with a Z equal to 300 (m) and another one inside, smaller and with a Z equal to 200 (m). I should obtain ...
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0answers
22 views

Measuring distance traveled, in 3D using ArcGIS Pro?

I'm working in ArcGIS pro, I have tracking data from a bird's flight path and want to know how far the bird flew. I started with Google Earth KML Layer and imported to ArcGIS Pro. This layer has data ...
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0answers
55 views

QGIS Display Attributes as Z Value for Point Shapefile?

I would like to create a state map that displays a 3D bar chart for each of 20 colleges (mapped as points) showing the percent share of engineering degrees earned by award level (i.e., assoc, ...
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0answers
70 views

Extract Layers form .slpk File

I have been given an .slpk file generated by Drone2Map. I can import the .slpk file into ArcGIS Pro but I'm unable to edit the 3D layers in the package. I have not been able to find a way to extract ...
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0answers
87 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....
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2answers
71 views

How to densify point feature class in ArcGIS?

I have a 3D (x,y,z) single point feature class which points are equally spaced, like this: As the distance between each points are more than one meter, I was wondering if there's a possibility to ...
1
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1answer
45 views

Displaying pointcloud symbolized with RGB values in ArcMap?

I know that I can display a LAS dataset in ArcScene with RGB Symbology, but is there a way of doing this in the 3D View window in ArcMap? The LAS Dataset toolbar only has symbology for elevation, ...
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0answers
40 views

Is it possible to do a visibility analysis and create a 3d - cone as a result in ArcGIS?

I have a digital surface model of a region and the coordinates and height of an observer point and need to do a 3d - visibility analysis for this point. However, as a result I would need a ...
2
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0answers
83 views

Complex 3D/elevation profiles in ArcMap 10.6

I'm looking to create a more informative 3D Profile than appears possible with vanilla Arc tools. Honestly I'm kinda surprised that this doesn't exist, maybe I'm searching the wrong terms. Situation: ...
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0answers
24 views

Is there a way to mask the area projected in QGIS 3D View?

I'm attemping to create a 3D map view for export to a PDF. However, QGIS's 3D map view seems to base its canvas solely on the viewable area within the main window in QGIS proper. e.g., as you zoom ...
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0answers
39 views

Adding 2d and 3d base map which includes map actions in Qt application using C++?

I would like to add a base map(Map in the background) to view geospatial vector data in a Qt application i.e written in C++. I have gone through the Qt documentation here. I was only able to find 2d ...
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0answers
32 views

PyQGIS 3D Map API

I can't find the way to show / hide / manage 3D map canvas in pyqgis. I've searched in API but nothing. Is there a way to control the 3d map visualization from plugin like QgsMapCanvas?

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