3D is an object that has three dimensions.
20
votes
3answers
2k views
How to find the minimum-area-rectangle for given points?
The following is another problem that I am working on it these days.
As you see in the figure, (BTW, I tried to make it self-presenter) the question is:
How to find the minimum-area-rectangle (MAR) ...
4
votes
1answer
165 views
How can I Enable Google Earth 3D features in QGIS?
I want to ask if there is any plugin or any other way where I can use Google Earth features in QGIS. When I'm saying Google Earth features I mean to be able to see roads, towns, etc and to be able to ...
7
votes
2answers
93 views
How do you treat partial 3d features in PostGIS?
We have features from survey data that contain partial 3d information.
The most common example would be a 2D LineString representing a road, that contains elevation information in certain points ...
5
votes
2answers
113 views
Creating Anaglyphs from Nadir Images
Has anyone made an anaglyph photo from Nadir geospatial data? I have found some excellent examples of making anaglyphs in GIMP from digital photography. I would like to do a similar process with ...
3
votes
1answer
331 views
Can I create a 3D model in QGIS or is there some model for 3D city model?
Can I create a 3D model in QGIS or is there some model for 3D city models? I need these information for my project.
5
votes
5answers
322 views
What are the main fields of applications of 3D GIS?
I'm doing a scholary research on 3D GIS but i have some problems in finding where they are used. Does anyone know of any real life examples where 3D GIS has been adopted?
10
votes
4answers
502 views
Looking for free program, similar to 3D Analyst, to visualize tree stands in 3D
Heyho,
I want to make a 3D stand visualization of trees in a specific area. I need something similar in functionality to ArcGIS 3D Analyst, but I don't have a license for that plugin anymore.
The ...
5
votes
0answers
76 views
How to sample a 3D raster along a 3D path (or 4D raster along 4D path)?
I have a 3d raster dataset of atmospheric variables (lat x lon x altitude). I would like to sample this raster dataset along a 3d path.
Any idea how I can achieve this, preferable with qgis or ...
2
votes
1answer
118 views
NEAR_3D function without the need for 3D Analyst, Arcpy
I am looking for a python script which would do similar as the ArcGIS 3D Analyst NEAR_3D function.
Basically I would like to programatically in python find nearest points of one point feature class ...
6
votes
1answer
1k views
Is there are QGIS plugin to allow the 3d visualisation of geological borehole data similar to the 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 ...
4
votes
1answer
493 views
TIN Creation from 3D Contour File
I'm currently trying to import a 3D contour file into a Quantum GIS project. My question is, how can I export the DXF file from Microstation with height information? I already have imported it to the ...
2
votes
1answer
144 views
3d terrain from data in postgres
I am quite new to arcgis and I would like to create a 3d terrain. Now I have a postgresSQL table containing a list of points with their geometry data and the Z value for each point.
What I would ...
4
votes
0answers
199 views
How to convert a set of points to a solid object?
I have a data generated as the output of some numerical processes. I need them to be converted into 3D solid objects (as CAD solid format) to make them importable for some particular numerical ...
8
votes
3answers
225 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 ...
3
votes
0answers
120 views
Exporting 3D geometry from PostGIS 2.0
I have a table containing 3D geometry in a PostGIS 2.0 database (the geometry is of type LINESTRING Z).
I need to get the geometry out and into a DXF, DGN or 3D Shapefile. What is the easiest way to ...
4
votes
1answer
187 views
Is there a way to visualize a 3D full/solid body (like a full layer) in ArcScene
I am trying to present layer and simulated layer (how it decreased in a year, for example) in ArcScene, but showing two layers one on each other with a slight difference (like max 30 cm.) does not ...
5
votes
4answers
407 views
Open Source Stereo Compilation Software
I work in a Geography Department at a small university and we are looking at putting in 3D Stereo Compilation systems. We have been looking at Stereo Analyst, PurView and Dat/em, but I was wondering ...
2
votes
1answer
88 views
Is it possible to rectify an aerial photo with known control points in 3d, in QGIS?
Bonjour,
Peut-on avec Quantum GIS redresser une photo aérienne avec des points caractéristiques connus en 3D (XYZ) ?
-- Translation:
Hello,
Is it possible to rectify an aerial photo with known ...
2
votes
1answer
227 views
How to find the closest Edge from a Line
Currently I'm working on a basic 3D model viewer in MATLAB, which can import .OBJ files (modeled in e.g. Blender). The purpose of this viewer is to test different subdivision schemes (like ...
4
votes
2answers
773 views
How to build 3D building models from lidar data?
Aloha to all and thanks for helping me.
I have Lidar data, ground points and first returns. I have processed it and have ready tiles from which I am trying to build 3D building models.
So far I was ...
12
votes
4answers
547 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 ...
4
votes
3answers
1k views
3D subsurface modelling
I am a student and initiating a thesis project for MS specialize degree in geophysics...
I am working on tectono - stratigraphy of some area and want to do the 3D subsurface modelling of the same ...
7
votes
4answers
364 views
Which ArcGIS product gives full 3D terrain navigation and (flight) simulation?
I looked at the ArcGIS ESRI website and find that 100% of the screenshots depicts a 2D map with at most relief shading.
Is there any product ArcGIS or not that gives real 3D terrain visualisation ...
29
votes
4answers
4k views
Migrate from ArcGIS to QGIS?
This is my first visit to and first question on this site, I hope this newbie question is suitable here.
Our lab has about 10 projects in ArcGIS 9 (a couple are made in ArcGIS 10) that includes the ...
22
votes
1answer
3k views
How to find the center of geometry of an object?
Well it might be a simple question. Given a set of 2D or 3D points, the question is:
How to find the center of geometry of an object?
According to the following figure, the center of geometry ...
3
votes
2answers
163 views
GOCAD and SKUA 3D Models Online
I am looking to build a 3D Web Mapping Application using data/projects initially created within GOCAD and SKUA. We currently use ArcServer 10. Initial looking around online has suggested that I could ...
6
votes
1answer
155 views
What's a robust strategy for displaying 3D map data for navigation?
3D map data, specifically the kind you see on GPS units, or more recently on smart phones, almost always features a 'HUD' like view, which I'm trying to implement in an application of mine. I have ...
2
votes
0answers
292 views
Visualization libraries for rendering 3D GIS world on iOS/Android
Are there any good 3D libraries/frameworks for rendering 3D worlds in geospatial coordinates on mobile platforms?
Use case: I have some known 3D geospatial features (eg. buildings) with their ...
5
votes
1answer
315 views
How do I cast shadows from 3D Objects in ArcScene?
I would like to cast shadows from my 3D objects in ArcScene onto the surface and other objects. (Much like I can in SketchUp). Is it possible? If so how?
3
votes
1answer
661 views
How to draw a cross section in QGIS
Given my enthusiasm for QGIS, does anyone have a simple workflow for drawing cross sections of earth features? My thing is that QGIS is being used to present the plan view, but we have a little ...
1
vote
0answers
106 views
Data source for 3D buildings (germany)
I'm searching for a data base or webservice, that provides buildings at a level of detail (LOD) of
cuboid (length,width,height) or
roof, corners, etc
or better. The area should cover germany.
...
3
votes
2answers
184 views
Invoke PostGIS functions outside of the database? Need to force 3D in GeoDjango
I'm looking to ensure that all geometries saved to the database are three-dimensional. It's easy enough to do with a call to the database,
select ST_Force_3D( ST_GeomFromText( blah blah ) )
...but ...
0
votes
0answers
58 views
How to make billboard Marker Symbole in GlobeControl
I'm using a 2D symbol style library for elements' symbols in a draped graphics layer in GlobeControl and it succeeded.
Now I'm trying to make the symbols billboarded, how to do this by ArcObjects ?
2
votes
1answer
248 views
Conversion of ASTER GDEM data for CFD Analysis
I need to do a computational fluid dynamics (CFD) analysis of wind over a large area of land. I have obtained the necessary tiles from the ASTER GDEM data set (in .tif format) and was wondering how I ...
4
votes
1answer
72 views
Rasterise heights from a 3D linestring
I have a 3D network of streams represented using linestrings with Z-coordinates. I would like to rasterise this feature, where the raster values represent the linearly interpolated Z-values between 3D ...
4
votes
1answer
810 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 ...
5
votes
2answers
661 views
How to visualize 3D model in ArcGIS?
I have hypsometric map/model of mountain which I get by contour lines with Z value. Can you explain how to visualize 3d model in ArcGIS? I need to get something like nviz command in GRASS.
1
vote
1answer
234 views
PostGIS - table with 3d points with fast ordering by distance
I am pretty new to PostGIS and I am trying to solve the following problem.
I need a table with 3D points (x,y,z) that will contain around 1-10million points. I want to be able to efficiently ask the ...
3
votes
1answer
629 views
ESRI 3D Analyst: Which Graphics card?
in order to make the most of ESRI´s 3D analyst I would like to order an appropriate graphics card. I have been recommended the AMD FirePro V5900 2 GB by someone who doesn´t know much about GIS hence ...
7
votes
7answers
12k views
How can I create profile cross-sections in ArcGIS 10?
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 ...
1
vote
3answers
388 views
Point to Raster Issues
I am having some trouble with something fairly simple..
I am creating a 3D subsoil model for display in arcscene - i can get it displayed nicely as points but in order for the model to be easier to ...
5
votes
2answers
200 views
3D snapping in open source platforms
I'm looking for tools and extensions in open source platforms (gvSIG, QGIS, uDig, etc) that allows 3D snapping.
In the last years, most of the projects my company is working on required the editing ...
2
votes
1answer
883 views
How to export a shapefile from ArcGIS 10 into Autodesk Ecotect?
I am trying to export a shapefile from ArcGIS 10 into Autodesk Ecotect Analysis 2011 for solar analysis. I have a shapefile with polygons, and the heights of buildings is stored in the attribute ...
3
votes
5answers
1k views
3d earth mapping with javascript or browser plugin
I am currently working to develop a web-based mapping application. A lot of the mapping tools such as google maps are 2d imagery. I know that google earth has a 3d browser plugin, but a requirement of ...
2
votes
3answers
1k views
Display 3d building using OpenLayers
Is there any way to display a 3d building model as a layer under OpenLayers ? i have the building models drawn using Google sketchup , is that useful ?
2
votes
0answers
65 views
Determine which points fall within a 3D polygon and export this subset to a flat file
I am working in ArcMap 10 and will have a 3D representation of a zone of transmission. I would like to determine which GPS points fall within this polygon and then export this subset out to a flat ...
11
votes
1answer
422 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 ...
1
vote
1answer
508 views
GRASS v.out.dxf 3D into AutoCAD
So continuing with my last question (Create 3D dxf with OGR) I have decided to give the GRASS option a go.
I have imported my polylines into GRASS using v.in.ogr and converted them to 3D using ...
2
votes
0answers
164 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 ...
11
votes
2answers
262 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 ...
