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1

Theres an item called Solmeta Geotagger Pro, which you might want to take a look at, im not sure about the price. http://www.solmeta.com/Product/show/id/14 We've used it, but had mixed results if you are not in the open, as the slightest interferences cause incorrect measurements. It is not usable in a car for example.


1

You can use a free utility (Dxf2xyz 2.0, downloadable from http://www.guthcad.com/freestuff.htm) to convert from both dwg and dxf files to an "xyz" file, i.e. a comma delimited text file containing xyz coordinates. Then you need to change the extension file from ".xyz" to ".txt", before you load the xyz file in QGIS by the button "Add delimited text layer". ...


2

If you want to get a 3D DXF from a SHP (SHPfile generated from DTM with Qgis-Processing-Tools-GDAL/OGR Extraction-Contour), you must: 1) have column with Z values into Table attributes of SHP. 2) open "OSGeo4W Shell Commands" if you have Windows OS. 3) write into shell for example: ogr2ogr -f "dxf" d:\Temp\3Doutput.dxf d:\Temp\contour.shp -zfield ELEV ...


2

Here's a few improvements on previous answer. Use randomCoordinates to more evenly distribute the points, and save creating any intermediate rasters. Just a 2D triangulation, simpler and more directly what we want, though there's more required, you need work to "seal" the surface properly by triangulating in a smarter way. To really get the exaggeration ...


2

In the field of geology there are some standards evolving: 1. RESQML RESQML is being developed by the Energistics Group which is a consortium of geomodelling software vendors (Paradigm, Schlumberger etc.) and users of this software (Total, CCG, BP etc.). They try to put all the information of their softwares into this standard. 2. GeoSciML GeoSciML is ...


0

You could certainly load this raster data into Rasdaman (using Postgresql as the underlying database), then use either the Petascope interface to provide a WCS/WCPS service and query the data that way, or use the internal RASQL query language to do the same querying. See the Jacobs University pages for examples of using Rasdaman for multi-dimensional data. ...


1

Check out the open-source Virtual Terrain Project, or VTP. http://vterrain.org/ Their goal is to foster the creation of tools for easily constructing any part of the real world in interactive, 3D digital form. This requires a synergetic convergence of the fields of CAD, GIS, visual simulation, surveying and remote sensing. VTP gathers information and ...


1

a radially symmetric surface could be seen as a function of the distance. so you could draw a point at the center of your crater, then compute the distance to the point (euclidan distance) and apply your function of the distance using map algebra. If your function is too complex, the workaround is to reclassify your distance from point.


5

EDIT: I've updated this to do an actual surface. It's interactive with rgl, and you can zoom in to see the closed surface but you'll need more work to respect the actual WGS84 datum and get your vertical exaggeration just right. Download the files with R: baseurl <- "http://earth-info.nga.mil/GandG/wgs84/gravitymod/egm2008/GIS/world_geoid" fs ...


0

I have another question, actually after import 3D dxf file , it doesn't have any Z attribute . thanks for your help in advance.


5

Take a look into QGIS Plugins for that purpose. qgis2threejs is a experimental python plugin that is getting better and better as we speak. It allows you to transform any internet browser with WebGL into a 3D visualization tool. You can check the code here: https://github.com/minorua/Qgis2threejs Also check this usage example done by Anita Graser: ...


5

You can also use ViziCities (in the browser using OpenStreetMap, WebGL and JavaScript), though it only supports 3D buildings and geographic features right now (data layers coming soon). Disclaimer: I'm the developer behind ViziCities, though my only intention is to let you know about it and let you decide which tool is best for you.


15

1) For a full 3D GIS, the better is GRASS GIS, look at Screenshots of 3D data management or From drone-aerial pictures to DEM and ORTHOPHOTO: the case of Caldonazzo's castle, from example. Some examples (interactive: you can scale, rotate the representation and many other things) : DEM with 3D points: Draped raster on the DEM Draped geological map ...


1

You can use OSM2world to pass 2D data from OpenStreetMap (map.osm) to 3D objects (map.obj), then use another converter (convert_obj_three.py) to convert it into a threejs JSON model (map.js), and then use it in a threejs scene. You can see how here: https://www.youtube.com/watch?v=S6LbKH6NnZU


2

Well this is almost certainly against Google's Terms of Service, so I'm definitely not recommending it, but I found an interesting method of extracting Google Earth building models to OBJ files here: Google Earth to OBJ Using GLIntercept If you can wait, the Singapore Land Authority is reportedly in the process of developing a 3D togographic dataset. I ...


3

Reason is that your wkb_geometry is "well known binary" in bytea type of column, it should be geometry type. You can convert it to geometry using ST_GeomFromWKB(bytea) see this , if you dont want add new column then replace ST_ZMax(wkb_geometry) with ST_ZMax(ST_GeomFromWKB(wkb_geometry))


1

http://osm2world.org/ works without WebGL, but uses Java instead of js. Designed for output of Openstreetmap buildings data, it should be adoptable for other 3D data as well. The output is a slippy map similar to leaflet: http://maps.osm2world.org/


1

The closest I've seen is the work of Mike Bostock. He has a really cool map which has a kind of oblique projection. But there's nothing that makes it easy. D3 does my head in with respect to setting up projections. You can make amazing things if you work at it though.


1

This is one of the primary use-cases for ViziCities (3D cities in the browser powered by OpenStreetMap), although the data layers aren't currently working yet. Perhaps something to consider for the future: https://github.com/robhawkes/vizicities Disclaimer: I'm the developer of ViziCities



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