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11 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 ...
morishuz's user avatar
  • 265
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 ...
RafDouglas C. Tommasi's user avatar
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 ...
vcloarec's user avatar
  • 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 ...
Andre Silva's user avatar
  • 10.3k
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" ...
Joseph's user avatar
  • 76k
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 ...
Dale Lutz's user avatar
  • 847
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. ...
Karsten D.'s user avatar
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 ...
dbaston's user avatar
  • 13.2k
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 ...
Zoltan's user avatar
  • 7,410
3 votes

Generating TIN from DEM using MacOSX/Unix tools?

There are now more open source, lightweight tools to achieve the DEM-to-TIN process. hmm is a fast C++ implementation of TIN generation using Delaunay triangulation, and it has a CLI. I've made Python ...
Kyle Barron's user avatar
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 ...
ZrSiO4's user avatar
  • 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: ...
Saijin_Naib - No To OpenAI's user avatar
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\...
Kazuhito's user avatar
  • 31k
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 ...
Spacedman's user avatar
  • 65.1k
3 votes

Can't open IDW interpolation while I'm using QGIS 3.34

The error message is due to a bug in QGIS version 3.34.0, which you are probably using. The issue has been already fixed and it doesn't occur using the latest available QGIS version 3.34.1 or QGIS ...
Andrea Giudiceandrea's user avatar
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 ...
DJH's user avatar
  • 69
2 votes

Generating TIN from elevation data in Python

I recently implemented a small package to do this in Python: pymartini. It's a port of the Martini JavaScript library. It's implemented in Cython, so it's very fast (on the order of milliseconds for a ...
Kyle Barron's user avatar
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 ...
Jakub Sisak GeoGraphics's user avatar
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 ...
GISGe's user avatar
  • 9,684
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
Ahmed GIS's user avatar
  • 420
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 ...
alecsx's user avatar
  • 618
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 ...
alecsx's user avatar
  • 618
2 votes
Accepted

Creating TIN says Maximum number of data points has been reached?

In an official answer I got from ESRI, they were stating that ArcScene cannot handle TIN files larger than 2GB. Their advice was to subset the data as @PolyGeo mentioned in his answer. On the other ...
alecsx's user avatar
  • 618
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 ...
ZrSiO4's user avatar
  • 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 ...
morishuz's user avatar
  • 265
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 ...
Lutra's user avatar
  • 681
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 ...
CrystallineEntity's user avatar
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 ...
Gabriel De Luca's user avatar
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://...
Spacedman's user avatar
  • 65.1k
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 ...
Val P's user avatar
  • 3,878

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