Questions tagged [3d]

Questions related to GIS objects that have three dimensions.

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91 votes
7 answers
111k views

Finding minimum-area-rectangle for given points?

As you see in the figure, the question is: How to find the minimum-area-rectangle (MAR) fitted on the given points? and a supporting question is: Is there any analytical solution for the ...
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  • 3,307
8 votes
2 answers
18k views

Is there QGIS plugin to allow 3d visualisation of geological borehole data similar to functionality of Target for ArcGIS?

I'm very new to QGIS, I have started using it as my new company is not willing to pay for ArcGIS and Target at this stage so I'm hoping QGIS can substitute not just in the interim but for good. What ...
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  • 81
10 votes
4 answers
5k views

Assigning RGB values from Geotiff image to LiDAR data, using R

I have given a Geotiff image and its corresponding Lidar data (x,y,z) in UTM coordinates. I need to merge the Lidar data with the RGB values from the image. That means, at the end, I need to plot (...
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7 votes
3 answers
9k views

Generating STL (3D) file from raster ASTER GDEM data?

I load an ASTER data to Global Mapper workspace and try to export to STL file, receive the message that I need a 3D vector file. I tried all formats in GM, grid xyz, dem, contour in vector format ...
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5 votes
5 answers
16k views

Importing 3D DXF file into QGIS with z information as attribute value?

I have a dxf file of 3d contours. after import it does have only layer,x,y attribute and doesn't have Z attribute. How can I provide Z attribute to create a TIN file?
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  • 227
7 votes
1 answer
5k views

Contour lines with imported shapefile using Blender GIS - wrong Z values

I've been making experiments with Blender GIS and QGIS. I'm having problems when importing Shapefiles with contour lines, with a field for elevation (ELEVATION FROM FIELD selected when importing). I'...
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43 votes
1 answer
42k views

Finding center of geometry of object?

Given a set of 2D or 3D points: How to find the center of geometry of an object? According to the following figure, the center of geometry differs from the center of mass if it is calculated in the ...
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  • 3,307
22 votes
9 answers
26k views

Viewing LiDAR data from web browser?

I am looking to host lidar data on my own server and give clients the ability to view that data through a web browser as a 3D point cloud (file would be in .las format or equivalent), possibly with ...
18 votes
3 answers
1k views

How much Water on Earth(USGS) : A Wrong Map representation?

I happened to read a USGS article, How much water is there on, in, and above the Earth? showing a representation of all the water(which includes water from Oceans, Seas,Bays,Ice caps, Glaciers, ...
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  • 7,024
11 votes
2 answers
2k views

Clarification of the "25D" option in ogr2ogr

[EDIT: In my original post, I had received an error that was based on a typo, so I scrapped that part of the question, but left the questions that still apply.] In the ogr2ogr docs it says: -nlt ...
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7 votes
1 answer
16k views

Drawing cross section in QGIS?

Does anyone have a simple work-flow for drawing cross sections of earth features in QGIS? My thing is that QGIS is being used to present the plan view, but we have a little interest in some ...
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  • 3,422
5 votes
1 answer
299 views

Why are z-values replaced with zero after in_memory use in Python?

My script takes separate 3D feature classes, calculates a field, appends to a target feature class, and then deletes the originals. This is a huge data processing task of over 4700 mass point feature ...
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  • 51
10 votes
2 answers
24k views

PostGIS Column has Z dimension but geometry does not

I am able to create a geomtry column for 3d multiline using this: CREATE TABLE trajectories ( gid serial NOT NULL, vehid character varying(10), state integer, geom geometry(...
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30 votes
7 answers
18k views

What are my options for 3D web Maps?

I wish to have a Online 3D Map, which would show my Data, i.e both Raster and Vector, draped on a DEM that I have. Due to the requirements of using my own DEM & Raster data, Google Earth API is ...
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9 votes
3 answers
38k views

Creating profile cross-sections in ArcGIS Desktop 10.x? [closed]

Because the default 'Profile Graph' tool was not sufficient, I wrote a custom VBA script that creates scaled and exaggerated profile cross-sections in ArcGIS but I need more features: Visualize more ...
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5 votes
1 answer
1k views

Making a 3D map with shapefiles, lidar and aerial image data

I want to try to make a simple 3D map for a small area (10 square miles) with some housing, some roads and some vegetation on it. My geodata is as follows: shapes with houses/roads/vegetation. ...
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5 votes
1 answer
8k views

How to create a 3D shapefile with QGIS from values stored in the attribute table

I have a shapefile containing buildings represented as polygons (basically the area of the buildings). In the attribute table there is a field where the elevation of every building is stored (every ...
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  • 941
8 votes
1 answer
5k views

QGIS calculate the 3D surface area of a region?

I would like to calculate the true surface area of a region from DEM (2D elevation data). Is it possible to do this with QGIS? And if yes, how? I managed to obtain a 3D visualization of the ...
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13 votes
7 answers
12k views

How can a 3D model of a building be displayed in a web-browser?

I would like to try to show a proposed building in a web-browser such that the user can interact with it in a way similar to google maps streetview. Is it possible to do this, in any platform? I can ...
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  • 16k
8 votes
4 answers
3k views

Is it possible to create 3D dxf with OGR?

Does anyone know if it's possible to create a 3D dxf with OGR? I would like to assign the contour lines a Z value and then export them to dxf for some cad work. PS. I know FME can do this, however I ...
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  • 34k
13 votes
2 answers
16k views

How can I sucessfully import 3D surface and features from ArcGIS 10 into Sketchup 8?

What are the steps required to successfully export an entire 3D model (composed of TIN surfaces, 3D polygons, 3D polylines and 3D points) from ArcGIS 10 to Sketchup 8? Preferably, I would like the ...
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2 votes
1 answer
3k views

How to create a 3D shapefile from a raster?

I´m trying to make a 3D shapefile from a raster feature but not working. Tried already to run the command in OSGeo4W but nothing happen. I'm using the Qgis 1.8.0 Lisboa. The purpose is to get a final ...
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22 votes
4 answers
17k views

Which software to use to create professional fly-over/ fly-through animations?

I will need to create a high quality fly-over animation which penetrates the surfaces and reveals subsurface geology. The intended use is for demonstrations, presentations and a company website so it ...
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30 votes
8 answers
6k views

When is a 3D Visualisation in GIS Useful? [closed]

I can currently only think of two cases: to visualise potential changes in a landscape, such as the effect of adding windfarms, or the addition of a new building to an urban area. However both these ...
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  • 14.1k
10 votes
2 answers
4k views

DXF attribute to z value

We have been given a DXF that contains a Elevation attribute but we would like to generate a 3D DXF. I know I can generate a 3D dxf from a shapefile using: ogr2ogr -f "DXF" out.dxf in.shp -zfield ...
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  • 34k
5 votes
1 answer
11k views

Assign z values to depth curves in QGIS

I'm new to QGIS and working with GIS in general (student of architecture), so please bear with me. I have obtained shapefiles with topographic curves of an ocean floor. My intention is to export ...
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  • 153
10 votes
3 answers
7k views

How to properly Drape vectors over a DEM?

I have a DEM of my study area, and the streams in it. Whenever I add both to ArcScene, and drape the vectors over the DEM, some of the vectors disappear from over the surface, and are visible under ...
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6 votes
2 answers
1k views

Creating 3D points in PyQGIS?

The python version of QgsPoint takes just two floating point parameters, unlike the C++ equivalent. The QGIS API docs for QgsPoint gives this example: pt_z = QgsPoint(120, 343, 77) pt.exportToWkt() # ...
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5 votes
2 answers
2k views

Retrieving average building height in urban areas?

I am looking for a way to collect data on the height profile of some cities over time. I don't need to produce a detailed 3D reconstruction of cities, nor do I need to detect and measure individual ...
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  • 239
3 votes
1 answer
958 views

PostGIS -> LineString + PointZ = LineStringZ

DATA I have 2 tables in PostGIS: linestable with MultiLineString geom surveypointtable with Point + elevation attribute GOAL The goal is to rebuild the lines as 3D replacing line's vertices with ...
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8 votes
2 answers
13k views

Features to 3D from 2D in QGIS

Is there a way to convert 2D features to "3D" features in QGIS? I know there is a way to do this in ArcMap by using an attribute value in the attribute table, but I am looking to do this with ...
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  • 9,253
3 votes
1 answer
432 views

Does raster interpolation recognize multiple z values for one x, y point?

I am working with lithological data, where I have multiple z depths for one set of coordinates. How is this read by the raster interpolation toolset? Does it utilize only one or all of these z values? ...
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  • 61
1 vote
1 answer
377 views

Simple georeferenced 3D data format for building models

I am looking for a simple georeferenced 3D-data format to store very simple building models. Each building should be represented as a number of poylgons, semantics do not matter. It would be ideal if ...
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0 votes
1 answer
219 views

QGIS 3D - no terrain altitude binding

I have tested with point and polygon layer. I get no terrain altitude binding. I use for the project and for the layer crs WGS 84 / UTM zone 32N (32632). Screenshot example with point layer, cylinder....
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  • 594
16 votes
7 answers
4k views

What are some 3D visualisation tools that successfully work with GIS data?

There are a large number of 3d modelling tools available (both open and closed source). I would like to be able to: Import GIS data into a 3d environment and retain georeferenceing. Retain the ...
39 votes
4 answers
13k views

How to migrate from ArcGIS for Desktop to QGIS? [closed]

Our lab has about 10 projects in ArcGIS 9 (a couple are made in ArcGIS 10) that includes the following in each: A georeferenced (WGS1984 geographical projection) raster seafloor image, representing ...
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  • 2,987
11 votes
4 answers
4k views

Looking for a free program for 3D visualization

Looking for a free program or web software for 3D visualization. I'd like to have an ArcScene like abilities. No editing needed, just need to see the data in a 3D format. It'd be really helpful for ...
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  • 4,365
13 votes
1 answer
5k views

Displaying cross-sections on a web page

I'm looking for inspiration and possible tools on how to display cross-sections on a (dynamic) webpage. More specifically I have to show on these cross-sections how underground pipelines are located ...
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  • 6,145
21 votes
3 answers
7k views

Finding the Center Line from a set of 3D Points

I have a set of 3D points. They follow a curved pattern with a rather constant diameter as shown below. What would be the algorithm to trace the approximate center line of these points?
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  • 7,024
9 votes
2 answers
6k views

Can I create, union and intersect 3D multipatch features using 3D Analyst extension (ArcGIS 10)?

I'm on ArcGIS 10. According to all the documentation I've read, 3D Analyst should be able to do what I am trying to get it to do, but I am running into problem after problem and I'm almost ready to ...
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  • 12k
4 votes
7 answers
17k views

Export 3D data DXF file

I'm trying to export a DXF file from QGIS 1.8.0 Lisboa and can not have a 3D file in AutoCAD or Microstation. It results always in 2D file. How can I export height data from a shapefile in QGIS?
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8 votes
1 answer
2k views

PostGIS 3D in Action

I was wondering if there is a website that showcases Openlayers and PostGIS 3D in Action
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  • 8,442
5 votes
2 answers
4k views

Georeferenced 3D Model Import

How can we open a 3D MAX File(3D Building model with exterior and interior elements)in Autodesk Infrastructure/LandXplorer or ESRI CityEngine? How can we georeference a 3D vector building model?
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  • 51
11 votes
5 answers
4k views

Where can I find a high quality real globe of a decent size without axis?

I'm trying to find a physical globe of a high map quality that doesn't have any axis or bearings as the axis mounted on standard desk globes completely obscures the arctic regions. High-quality map ...
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  • 241
11 votes
2 answers
402 views

Are there any 3D GIS which exploit consumer level 3D HDTVs?

My company is moving into a new building and we will be purchasing a 65" or greater HDTV for the conference room. I am interested to know if there are "3D" GIS applications which currently exploit ...
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  • 133
9 votes
4 answers
2k views

How to represent floors in a building

Is there any way to represent floors in a building using GIS? (Also, it's stupid that I have to use existing tags cos none suit my question so I had to choose one at random.)
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  • 200
6 votes
3 answers
6k views

How to drape a simple jpeg image over dem of some area?

How can we drape a simple jpeg image which doesnot have any geo referencing information over the digital elevation model in order to visualize it in 3D in QGIS?
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5 votes
1 answer
1k views

GeoJSON: PolyhedralSurface geometry type not supported

I am trying to make a 3D web application which should be able to render 3D buildings (I will be using Cesium, but that is not that important for now). I basically have a database consisting of the 2D ...
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  • 139
5 votes
1 answer
4k views

Is it possible to draw a 3D Choropleth Map in ArcGIS?

What I have in mind is something like these two examples below: Also, if it is not possible to create a 3D choropleth map in ArcGIS, is there some other GIS software package that can draw 3D ...
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  • 135
5 votes
2 answers
866 views

How do I georeference a ski map?

I have a map of a mountainous landscape, http://skimap.org/data/989/60/1218033025.jpg. It contains a number of known points, the lat-longs of which can be easily found out using google maps. I wish to ...
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  • 221