Questions tagged [saga]
SAGA (System for Automated Geoscientific Analyses) is a GIS toolbox with many modules that can be used from the GUI, command line or accessed through R,python or directly using C++.
642 questions
0 votes
1 answer
49 views
Correcting DEM raster using ground reference points (e.g., DEM 5 m + ~2000 samples)
I’m looking for a method or tool to correct or adjust a DEM raster, specifically an ALOS PALSAR DEM that has been enhanced and resampled to 5 m resolution. I have about 2000 reference points randomly ...
1 vote
1 answer
64 views
SAGA topographic position index not finishing
The question was asked 9 years ago, but I'll ask it again. I'm trying to run QGIS 3.40 SAGA Topographic Position Index but it never stops running. My DEM is 13118 X 7390 size, EPSG:4326 - WGS 84. ...
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1 vote
0 answers
39 views
Correct syntax for VAR_MODEL in sagang:kriging via PyQGIS
I am writing a PyQGIS script to automate interpolation using the sagang:ordinarykriging algorithm (QGIS 3.28.13, SAGA 9.2.0). While the algorithm runs successfully with the default linear variogram ...
- 11
1 vote
0 answers
64 views
Identity tool in QGIS cause some parts to shift, especially when working with large shapefiles
I'm working with the Identity tool in QGIS 3.34.7-Prizren (SAGA Next Gen 1.1.0), using two shapefiles: Hansen data (36 MB) and boundary data (1.35 MB) The result shows some shifted parts (leaving some ...
0 votes
0 answers
64 views
How to connect SAGA GIS to QGIS 3.44 on Linux Mint
So, I was trying to connect the SAGA plugins on QGIS today and I followed the instructions on the plugin page: I added the plugin and downloaded the latest version of the tarbel file, saga-9.9.2.tar....
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1 vote
0 answers
43 views
Installation problem with Basic Terrain Analysis in SAGA plugin in QGIS
Loading resulting layers Algorithm 'Fill Sinks (Wang & Liu)' finished QGIS version: 3.40.11-Bratislava QGIS code revision: df059ed19c Qt version: 5.15.13 Python version: 3.12.11 GDAL version: 3.11....
- 21
2 votes
1 answer
86 views
Processing of Topographic Wetness Index in RSAGA taking 5+ days to run - does anyone know of ways to improve this?
I am working with a LiDAR DEM for the Kickapoo Creek - Wabash River watershed (HUC10 0512010805) and trying to use the RSAGA package for SAGA GIS in RStudio to derive both topographic wetness index ...
- 21
0 votes
1 answer
77 views
Union process with aggregation/unique feature by overlay with QGIS
I have a very big polygonal layer (over 1 million objects). This layer contains a 'gid' column whose values uniquely identify each object. There is also a 'hierarchy_level_id' column: this string ...
- 1,106
0 votes
0 answers
50 views
How to properly calculate Topographic Wetness Index (TWI) in SAGA GIS
I'm trying to calculate the Topographic Wetness Index (TWI) in SAGA GIS and I need some help. I initially tried using the tool Topographic Wetness Index (One Step) but during the routing step, it ...
- 11
4 votes
3 answers
226 views
Containerized QGIS does not have SAGA plugin
I am struggling trying use SAGA processing scripts in headless mode. I have a dockerfile which builds the PyQGIS environment. But I can't use SAGA QGIS script. My dockerfile: FROM ubuntu:22.04 USER ...
- 193
0 votes
0 answers
34 views
Error in transposing Raster data in QGIS (netcdf format file)
Have you had a similar problem in transposing raster data using SAGA>Raster Tool? The error appeared as follows. QGIS version: 3.42.2-Münster QGIS code revision: 402273f8c2 Qt version: 5.15.13 ...
0 votes
0 answers
40 views
Compiling SAGA on Mac OS X
I try to install SAGA on Mac OS X according to https://sourceforge.net/p/saga-gis/wiki/Compiling%20SAGA%20on%20Mac%20OS%20X/ I use: /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/...
- 301
1 vote
0 answers
30 views
saga_cmd: how to list imported grids/shapes
Is there any way how to list files that were already imported into SAGA GIS using saga_cmd? For example, I have imported a Landsat band with the following command: saga_cmd imagery_tools 10 \ -...
- 123
0 votes
0 answers
19 views
QGIS and Saga upslope error [duplicate]
Could anyone help me with an issue with the Saga Upslope tool? Ive tried most of the work arounds discussed on here and elsewhere but none seem to be fixing it. The most common fix to my issue ...
- 59
2 votes
1 answer
127 views
Is it possible to merge multiple overlaying GPKGs in the way, that only the uppermost is included?
I want to merge multiple overlaying GPKGs in the way, that only the uppermost is included. It is possible to achieve this by iteratively applying the algorithms Difference and Merge with the Model ...
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