10
votes
Seeking tool to generate Mesh from DTM?
We have just created an open source project that will help you do exactly what you want. Tin-Terrain is a simple command line tool that will generate a mesh from DEM files either as TIN or TRN.
The ...
- 255
7
votes
Accepted
Understanding difference between TIN interpolation methods Linear and Clough-Tocher of QGIS
It seems that Linear and Clough-Tocher are quite coherent in respect to each other.
Out of curiosity, I tried interpolating a small, random dataset with both algorithms, also opting for the creation ...
- 6,364
5
votes
Reading Esri TIN file directly using QGIS
It is an new feature in the future release QGIS 3.10.
QGIS can now read ESRI TIN as this format is now supported by the MDAL library.
Edit :
Finally, it seems it will available in the future ...
- 153
5
votes
Converting LiDAR point cloud to 3D mesh
Be aware that .las and .obj are not the same type of data, in which the first is composed by points, and the second is a type of surface.
So, even processing the point cloud to output a surface it ...
- 10.2k
5
votes
Accepted
Interpolation (TIN) from Python Console in QGIS
The following minimal example is in a somewhat similar format to the post you linked to which should work for QGIS 3:
# Interpolate points using QgsTinInterpolator
pathToFile = "path/to/input.shp"
...
- 75k
5
votes
Accepted
Stopping FME TINGenerator processing unwanted nodes
Looks like you are running with feature caching turned on. Suggest you turn it off-then we won’t do the unneeded work. You can have your cake and eat it too with a bit of a workaround: check out ...
- 847
4
votes
Accepted
Converting TIN to Multipolygon in PostGIS?
You can use ST_Dump to extract individual TRIANGLE elements from the TIN. Then, you can convert an individual TRIANGLE to a POLYGON using ST_ExteriorRing and ST_MakePolygon. If you then need to ...
- 12.9k
4
votes
Accepted
Open source tools to create quantized-mesh tiles for Cesium?
My currently preferred solution is Cesium Terrain Builder Docker. It is an extended version of the Cesium Terrain Builder with support for quantized-mesh-1.0 and can be easily run using Docker.
...
- 91
3
votes
Accepted
Creating TIN raster from point layer from Google Earth in QGIS?
Probably the field type of ALT is not numeric. Interpolation plugin lists only numeric fields in the Interpolation attribute list. First check the field type in the layer properties dialog (right ...
- 7,112
3
votes
Generating TIN from elevation data in Python
A solution is to generate random points and sample the elevation raster at each of these points,
then interpolate these points with the method that you want (as in Ordinary Kriging Example: GRASS-R ...
- 54.2k
3
votes
Accepted
Tin created from raster have different profile graphs?
I have not used Raster to TIN, but judging by the documentation (which has an image to demonstrate), the triangulation is not performed using all of the nodes in the raster. It uses only enough that ...
- 3,101
3
votes
Interpolate (TIN) within a polygon extent QGIS/GRASS
One way to achieve this is to run (Vector geometry tools/Delaunay triangulation) in QGIS. You can then delete the triangles that fall outside of your desired boundary. This will produce a shapefile ...
- 904
3
votes
Accepted
Opening TINs in QGIS
Starting with QGIS 3.12.0 & MDAL 4.0 (unless the milestones get changed completely), the ESRI TIN files (ADF format) will be supported through the MDAL driver.
MDAL GitHub ReadMe:
Esri TIN: ...
- 2,699
3
votes
Accepted
Converting GOCAD .ts file to raster for ArcMap Analysis
OpenGeoSys offers converters to read GOCAD .ts files and export them as raster data.
In my Windows10 OS, I have downloaded OpenGeoSys (.zip) and extracted the file to 'My Documents' folder ("C:\Users\...
- 30.4k
3
votes
TIN Interpolation in QGIS but with a predefined Delaunay triangulation
The constrained area looks like a "concave hull" or "alpha shape". If you create a concave hull from the points (which, unlike a convex hull isn't trivial, it requires a tuning ...
- 61.5k
2
votes
Converting from ArcGIS TIN to LandXML?
I created a blog post detailing how to convert a TIN to the LandXML format using the lxml and pyshp libraries in Python. (http://www.knickknackcivil.com/tin2landxml.html)
Edit: Further info was ...
- 69
2
votes
Exporting ArcGIS TIN file to *.tin file?
ArcGIS TIN file is a proprietary file format that cannot be exported to other 3D TIN formats. At least not easily. In the past (up until version 9.x) there was Google extension that allowed to export ...
- 20.3k
2
votes
Setting height field in Create TIN" tool in ArcMap when using it in model?
The 'Height Field' can't be a standalone option, since it is always related to each of the input feature classes. But you can se the 'Input feature class' as parameter of the model, the Height Field ...
- 9,664
2
votes
Open source tools to create quantized-mesh tiles for Cesium?
Cesium supports two terrain formats:
Quantized-Mesh
HeightMap
For (Quantized-Mesh) you can try @juls comment.
But for (HeightMap) you can try this blog post:
Creating 3D terrains with Cesium
- 410
2
votes
Slow rendering of tin of large area in ArcMap?
ArcScene has some limitations, although I think the link I am providing is for x86 systems.
From personal experience you cannot load large TINs(> 1GB) into ArcScene/Desktop and visualize, but you can ...
- 598
2
votes
Accepted
Reading .adf (TIN) map files using GDAL
Have a look at VTBuilder, found here:
http://vterrain.org/Doc/VTBuilder/overview.html
One of the supported formats is now ESRI ADF.
- 36
2
votes
Converting 3D shapefile to TIN
From how your TIN looks I incline to believe you have used only the points to create it. You can try the next variants to solve your issues:
Create multiple polygons with Z values and use Interpolate ...
- 598
2
votes
Extrapolating surface in ArcGIS Desktop?
The best interpolation method depends on the application and the parameters used. The IDW technique for example requires a minimum and maximum number
of surveyed points to predict an interpolated ...
- 904
2
votes
cesium quantized mesh generator
The open source project Tin-Terrain might be of help. It is a simple command line tool that we have just released. It will generate quad-tree tiled TIN quantised meshes that are directly compatible ...
- 255
2
votes
Open TIN DEM File format
My suggestion is UGRID:
https://github.com/ugrid-conventions/ugrid-conventions
As the format is supported by MDAL (https://github.com/lutraconsulting/MDAL/blob/master/mdal/frmts/mdal_3di.cpp) which ...
- 657
2
votes
Changing lakebed symbology to relative depth in ArcGIS 10.5 (TIN or raster file)
To obtain strictly bathymetry, subtract the TINS from a DEM with "filled" waterbodies using a raster calculation such as the Minus tool in ArcGIS. This will bring all of the lakes to the same ...
2
votes
How to digitize a feature to include elevation data and interpolate slope in QGIS
According to my interpretation of the drawing, the lines are what are called structural lines, in the terminology of an interpolation.
Structural lines are vertical jumps in the terrain.
They ...
- 13.5k
2
votes
Accepted
Creating TIN using R
TINs and some of the other simple feature geometry classes are not well supported in sf at the moment. You can create them, but not do much else. For example (drawing from the WKT examples on https://...
- 61.5k
2
votes
Accepted
DEM interpolation, QGIS 3.10
The DEM seems to be the result of a Triangulation based on points and lines (probably ArcGis TIN algorithm). One thing that you can do is correct the value of the wrong cells using the Plugin Serval ...
- 3,808
2
votes
Accepted
TIN Output empty raster and corrupted Triangulation network
David it took some time, but I managed to get the correct data for you using the TIN Interpolation Tool. However, there is a catch. During my research I came across this article from September 2019 on ...
- 241
Only top scored, non community-wiki answers of a minimum length are eligible