Questions tagged [tin]

Acronym for triangulated irregular network. A vector data structure that partitions geographic space into contiguous, nonoverlapping triangles.

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6
votes
2answers
10k views

Seeking tool to generate Mesh from DTM?

Are there any tools that can take a DTM, in asc or geotiff format and generate a mesh from this that can used in meshlab or similar software. I have asc DTM file that I need to convert to a ply mesh ...
5
votes
2answers
13k views

Creating Tin from Elevation Points in QGIS?

I have a shapefile of points with values that represent elevation at the given point. I know that I can create a TIN from these points, but the fields in the TIN do not represent the elevation. Rather,...
5
votes
2answers
1k views

Comparing two TINs created using ArcGIS for Desktop?

I have the following two files: LiDAR las file1 Let's give it a name LiDAR las file2, contains the same file1 data, where number of points randomly removed. So if file1 contains X number of points, ...
2
votes
2answers
12k views

Can I create a TIN from contours lines (shp) in QGIS?

I need to do a slope analysis, and would like to make a TIN from 2m contours lines. Or do a slope analysis directly from contours? The only DEM available is not precise enough. I do not have any ...
8
votes
3answers
2k views

Generating TIN from DEM using MacOSX/Unix tools?

I'd like to generate a 3d terrain model moving from a DEM dataset (currently in shp and GeoTIFF format). As far as I understand it, the first step of the better path would be generating a TIN, but I ...
2
votes
1answer
4k views

TIN Interpolation using a vector layer

I'm writing a plugin in QGIS and I'd like to generate a TIN surface using a vector layer with x,y and z (interpolation attribute). The idea is to visualize the same result like in the Interpolation ...
2
votes
1answer
561 views

Creating TIN and contours in ArcGIS for Desktop?

I am upgrading from ArcView 3.1 to ArcMap 10.1. I have multiple LIDAR (bare earth) .txt files (x,y,z) that I would like to use to create a "TIN" (or is it Terrain Dataset in 10.1) and then contours? ...
8
votes
3answers
3k views

Creating TINs in ArcGIS from triangular elements?

I am working with Finite Element Method (FEM) models with triangular elements, and I'd like to view the results as TIN surfaces in ArcGIS (and in ArcScene). In my external source, I have nodes (with X,...
11
votes
4answers
609 views

Given a list of surveyor points, what is the algorithm used to simplify the points and retain the terrain characteristics?

Given a terrain and surveyor points sampled from from it or from its contours, is there any algorithm that one can use to simplify the points ( i.e., reduce the surveyor points number) and at the same ...
9
votes
1answer
635 views

Performing Overlay of Two Triangulated Irregular Networks (TIN)

I am referring to the paper here, section 2.6.1, on the adding and subtracting of two TINs: The addition of two TINs can be determined exactly and stored into a new TIN, because the addition of ...
0
votes
0answers
111 views

tin model in Qgis [duplicate]

I am having DSM and DTM data .My primary objective is to develope a CHM(Canopy Height Model) in Qgis.which i have done already but in my company they are stressing that CHM model which i already ...
5
votes
3answers
1k views

Getting from a DEM to points that could be used for a TIN

I have a DEM, and would like to create a set of points that I can use to make a mesh for a 3d modeling program, such as Maya, Blender, or SketchUp. If I were to make a TIN from a DEM in ArcGIS, ArcGIS ...
5
votes
3answers
2k views

Removing distorted edges of TIN surface?

I'm trying to remove the stretched edges of a TIN surface without having to draw a polygon around the features that I want clipped. Does anyone know how to do this without free hand drawing? I was ...
4
votes
3answers
2k views

What are limits on ArcScene and TINs from LiDAR?

I am trying to load anywhere from 5 to 10 LiDAR TINS into ArcScene. I am using ArcGIS Desktop Evaluation (student) 9.3.1. I just built a new computer with a AMD Phenom II X6 1090T six core processor, ...
2
votes
3answers
2k views

ArcMap - Making DEM using GPS vector data [closed]

I am new to GIS and GPS. I am going to make a digital elevation model of my school's campus using a trimble gps unit. I know the accuracy is not the best but it is just for a school project. My ...
2
votes
0answers
781 views

TIN to Raster Tool, output elevations are 3.40282e+038 and -3.40282e+038, tried calculate statistics didn't work

I have an input TIN file that I created using Create TIN. The elevations are all correct. When I convert the TIN to Raster using the tool, my output elevations are 3.40282e+038 and -3.40282e+038 I've ...
2
votes
1answer
436 views

How to calculate volume of bund around pit from TIN and external feature edge

I need to do some volume calculations of bunds. I suppose I should use the Surface Volume tool in 3D Analyst of ArcGIS. Here is the tool description. I am uncertain about the plane height parameter, ...
1
vote
1answer
3k views

VRML export issue ArcScene

when I try to export simple Tins (or documents which contain Tins) from my ArcScene to .wrl the export fails. Please see my example: I have the following table (xlsx): X Y hoehe 28 -2 0 -2 -...
1
vote
1answer
2k views

Converting raster to TIN and large section did not convert properly?

I've got a DEM for a pretty large area and I need to create a TIN. I'm using 3D Analyst Tools > Conversion > Raster to TIN. The process runs without any error messages, but a large section of the TIN ...
1
vote
1answer
760 views

Restricting Tin interpolation in QGIS

I am trying to do a bathymetric map for a lake using QGIS. However, I see no option to impose a mask so interpolation does not extending beyond the boundaries of my lake. I have traced around the ...
1
vote
0answers
143 views

Understand ramp color interpolation using QGIS 2.12

I try to understand the color ramp in TIN and IDW interpolation. I work with height points layer. The low value in 8 and the highest value is 584. With the interpolation plugin i create TIN raster ...
1
vote
1answer
138 views

Modelling fault plane using TIN? [duplicate]

I am working on a project which runs on ArcGIS platform using VB.NET. It is to model a sub-surface fault plane (currently a plane rectangular model with some dip) and then to find required distances ...
0
votes
2answers
3k views

Clipping TIN in ArcGIS for Desktop?

How can i clip this TIN and form like the polygon.
0
votes
1answer
125 views

Calculating TurfJS planepoint values for a set of points / Get containing feature with TurfJS

Turf.planepoint() calculates the z value for a point that falls on the plane of a triangle. I am struggling to make this work with a tin from turf.tin() and a set of points. Is there a turf function ...