Questions tagged [mesh]

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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
34 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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0answers
89 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
78 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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34 views

Create grid by interpolating two data sets?

I have two data sets A and B. Each data set have lat, lon and temperature but different lengths A=[200,3] B=[250,3]. I would like perform interpolate A and B and display the temperature(average ...
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0answers
101 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
318 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 ...
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1answer
289 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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383 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
34 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
55 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
892 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
283 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
229 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....
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1answer
931 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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312 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 ...
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0answers
169 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
261 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 ...
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2answers
948 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 ...
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1answer
649 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 ...