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4

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" layer = QgsVectorLayer(pathToFile, 'input','ogr') layer_data = QgsInterpolator.LayerData() layer_data.source = layer layer_data.zCoordInterpolation = False index ...


4

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 release QGIS 3.12 (end of February 2020).


2

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 elevation and allow for the desired symbology. If the desired effect is to scale all depth values to the same color ramp, then you may want to merge all of your ...


2

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: Format for storing elevation data as a triangulated irregular network MDAL Pull Request: Add support for reading arcinfo adf tin layers #162 #164: First ...


1

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 that allow you to change "manually" the value of any pixel. In the case of your DEM I think that the amount of the wrong pixels is small and you can try this ...


1

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://en.wikipedia.org/wiki/Well-known_text_representation_of_geometry) : > tin = st_as_sfc("TIN (((0 0 0, 0 0 1, 0 1 0, 0 0 0)), ((0 0 0, 0 1 0, 1 1 0, 0 0 0)))")...


1

You are searching in the wrong location. Raster to TIN and TIN to Raster tools are located under the conversion tools of 3D Analyst: ArcToolbox -> 3D Analyst Tools -> Conversion, not under the ArcToolbox -> Conversion: It works only if you have 3D Analyst extension: Raster To TIN.


1

Apparently this problem is related as your data is sorted. I had the same problem with TIN interpolation and this was solved when I organized my xyz file as lon, lat, attribute, being the order of values organized by longitude (from -180 to 180 degrees)


1

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 release QGIS 3.12 (end of February 2020).


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