Questions tagged [mesh]

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How to create a NetCDF mesh with x y vector data for QGIS mesh display

I have created a NetCDF mesh with u and v variables for velocity. I can load it onto QGIS 3.14 as a mesh layer. The variables are not recognized as vector though (isVector : No is displayer in group ...
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72 views

Visualising NetCDF from Delft3D in QGIS

I have some results from a simulation in Delft3D that I'd like to visualise as a mesh in QGIS. For example, I'd like to see the change in water level at a different time step in the domain. The file ...
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9 views

Merging FBX tiles in a single model file

I would like to obtain a single FBX file for a 3D photomesh, with texture. As the original scene is quite large, I use Bentley ContextCapture Master to generate tiles (a dozen), each being in FBX ...
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26 views

QGIS georeference a Mesh layer with wind vectors?

I have an .nc file with u and v components to create a map of wind speed and direction. When I add the layer as a mesh in QGIS, I am able to get the arrow vectors correctly (image below), however, the ...
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13 views

SIGABRT when calling QgsMeshLayer class (QGIS)

I am working on a C++ application that uses the QGIS API to overlay weather data from NetCDF files onto a KDE Marble map. I am using version 5.11.3 of Qt and 3.8 of QGIS on Fedora 28. When trying to ...
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1answer
45 views

Batch export multiple datasets in a group within a (mesh/raster) layer as images?

I have a mesh layer that contains a group with multiple datasets (dates). I'd like to export the visualization of each date together with another active raster layer (showing the basemap). I could do ...
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97 views

+0-180 degrees of mesh layer are displaying as horizontal lines [QGIS]

I have been trying to display weather data from ECMWF in QGIS on top of a base map, but half of the heatmap rendered from the mesh layer (imported via grib) displays as straight horizontal lines. I ...
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1answer
248 views

Extract values from Grib-files at several specific locations

I have got a GRIB file from ECMWF for a small area in the Antarctic. It contains hourly data for one month of multiple variables (eg. wind, seaicecover, sst etc.). I want to extract this data to .txt ...
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0answers
131 views

Converting and clipping nc4 files into raster file using QGIS?

Currently I am working on organizing the NASA's Gravity Recovery and Climate Experiment (GRACE) data with QGIS 3.10 and wish to clip it with the state boundary and rasterize its data so that I can do ...
3
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1answer
382 views

QGIS Mesh Calculator output file (.dat)

I want to understand Mesh Calculator in QGIS 3.8.3 to make calculation between two variables of a NetCDF file. Each of these variables has [lon, lat, time] dimensions. The calculation is done smoothly ...
2
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1answer
477 views

How to determine if a .obj 3D Mesh file is geo-referenced or not?

I have a .obj file output from OpenDroneMap. But I cannot determine if it is geo-referenced or not. How can I determine that?
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0answers
485 views

How to convert .OBJ 3D Mesh Georeferenced file generated from OpenDroneMap to .kmz format for Cesium?

I have Open Drone Map Output of a 3D Mesh Object file in .obj extension. I want to convert it into .kmz format to put it into Cesium Ion. How can I convert the files in the picture to a .kmz format ...
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1answer
41 views

2dm data disappears after rotating layout in QGIS

I ran into a bug (I suppose) recently. After loading a *.2dm format mesh (triangulated irregular network with elevation data), with the Layer --> Add Layer --> Add Mesh Layer command, I put some ...
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1answer
57 views

QgsMeshLayer in memory

I am trying to create a Meshlayer in memory and tried this simple test in QGIS 3.6: from qgis.core import QgsProject,QgsMeshLayer proj = QgsProject.instance() uri="1.0, 2.0 \n2.0, 2.0 \n3.0, 2.0 \n2....
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1answer
1k views

qgis-mesh data (GRIB2) to geotiff

basically i am trying to get out the direction and magnitude information of the current (flow/movement of water) information layer of a grib weather data file - which is a mesh in qgis terminology. I ...
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1answer
334 views

Agisoft Metashape Orthomosaics. DEM from mesh or dense point cloud

Does anyone know the differences between Orthos built from DEMs that were constructed from dense point clouds rather than mesh? My purpose is to preserve original data and minimize interpolation while ...
1
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1answer
274 views

Seeking open source or free tool to open 3D Mesh GIS files?

I'm looking a way to open 3d Terrain Mesh files. I have four different folders with same 3d content , I'd like to open one of them : Cesium folder (with internal Tile folder, web.config, tileset....
2
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1answer
1k views

ECEF (EPSG:4978) glTF model doesn't show up in Cesium

The issue: I have a glTF (ver. 2.0) mesh (converted from ply to dae to glTF) with triangles coordinates in EPSG:4978 that doesn't show up in Cesium (ver. 1.42). The code: This is the code in the ...
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345 views

Generate XYZ coordinates of DEM mesh/grid

Is there a way to generate a wire grid of plain text XYZ coordinates starting and ending points for each wire segment? I want to generate them from a digital elevation model. Preferably with gdal/qgis ...
1
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0answers
179 views

Getting Shaded relief from DXF mesh using QGIS?

I am stuck with a problem in QGIS. I have a three-dimensional mesh as DXF from AutoCAD, which I imported into QGIS. Now I wanted to create a shaded relief map. I think I need to create a raster from ...
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2answers
286 views

Client-side 3D surface generation in ArcGIS JS API

Is there any way to create some sort of 3D surface (mesh, TIN, elevationLayer) from contour lines on the client side with ArcGIS JS API? Or alternatively edit a hosted 3D surface (any format)? In our ...
1
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2answers
1k views

Create triangles from points on ArcGIS

I'm using ArcGIS 10.3. I need to create a grid where all the points are vertexes of triangles that do not overlap themselves. I want this to be done by only using the points location, no elevation ...
0
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1answer
703 views

How to clip mesh files with a mask, and calculate the (3D) area of triangles inside?

I have a georeferenced mesh produced by photogrammetry software such as Agisoft Photoscan. Within this mesh, I have some areas of interest, which I can define with 2D vector masks (on the x and y ...