Skip to main content

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++.

Filter by
Sorted by
Tagged with
0 votes
0 answers
55 views

SAGA Next Generation and QGIS

How can I install/connect SAGA Next Gen in QGIS? I've tried installing the 'processing_saga_nextgen' plugin in QGIS (version 1.0.0) as below, but it's not working as it should (**). My setup: QGIS ...
Spokesman1's user avatar
0 votes
0 answers
23 views

SAGA variable buffer not visible in QGIS

I like to use the variable buffer function of SAGA in QGIS. Although I've installed SAGA and it does not appear in the QGIS toolbox. Did I something wrong while installing or is this function renamed ...
BAE_23's user avatar
  • 677
1 vote
3 answers
85 views

How to merge multiple GeoTIFFs into one single GeoTIFF and change the resolution

I'm working on my Bachelor Thesis right now and I have a about 300gb of digital elevation database. This database has a 1m resolution and every single 1x1km square is stored into a single GeoTIFF. Now ...
Robin's user avatar
  • 21
0 votes
0 answers
18 views

QGIS SAGA Isochrone crashes

I am trying to make isochrones with SAGA GIS. I am now having a problem that: The Isochrone variable speed crashes or give odd outputs. I have a DEM with 3.6km2, but the output is about 3 pixels, even ...
ununanswered's user avatar
0 votes
0 answers
20 views

Make multiple scatteplots have the same X & Y scale

I have some scatter plot of LST and NO2 Concentration from year 2019 to 2023, however they have different scale of X and Y. Is there anyway to made them have the same scaling? Here is the image ...
Nich's user avatar
  • 11
1 vote
0 answers
25 views

What's the white dot on SAGA scatterplot

I'm new to SAGA. I tried making a scatterplot between 2 rasters, but in the graphic result aside from the line model, there's a white dot. What does the dot mean? Here is the image:
Nich's user avatar
  • 11
1 vote
0 answers
86 views

Accumulation Target in Flow Accumulation (Top Down) algorithm in SAGA

In version 2.2.3 and earlier of SAGA, the Flow Accumulation (Top Down) algorithm only required the (filled) DEM (Elevation) to run. There were a number of other optional inputs, including Accumulation ...
Tom Brennan's user avatar
  • 5,329
2 votes
1 answer
106 views

Running SAGA Next Gen algorithms in QGIS standalone script

Does anybody know how to run SAGA Next Gen algorithms in a standalone script? It was possible in QGIS 3.28 when the SAGA provider was a core plugin. I recently upgraded to 3.36.2 and installed the new ...
jger's user avatar
  • 137
0 votes
1 answer
54 views

Open source tools to merge categorical raster classes with neighboring class based on area

Given a categorical raster, I'd like filter based on area (ex. number of contiguous pixels) and then: For island groups (no neighbors) that are smaller than the desired area - remove (set to nodata) ...
Brent Edwards's user avatar
0 votes
1 answer
109 views

QGIS k-means fails - Loading resulting layers The following layers were not correctly generated

I'm using QGIS 3.22.14. I'm trying to k-means clusters on raster I have. The tool runs but the errors are not loading with the following log and error: Loading grid: C:/Users/tomi/AppData/Local/Temp/5/...
ReutKeller's user avatar
  • 2,169
0 votes
0 answers
58 views

Version error on SAGA NextGen on QGIS and MacOS

I am trying to use SAGA NextGen on QGIS and when I try to run a program I get an error message saying that I need to update the SAGA binaries to 9.1. I am using QGIS 3.34 on MacOS. Is there any way ...
ddomizia's user avatar
  • 648
0 votes
0 answers
30 views

Failed to export .tif file from SAGA GIS

I calculated Topographic wetness Index (TWI) and Topographic Position index (TPI) for the whole Austria but failed to export the result. The following is the process to export the result: (1) The ...
HsunHung Chu's user avatar
1 vote
1 answer
101 views

Can't use SAGA in QGIS

I have installed both QGIS 3.22.11-Białowieża and SAGA GIS 7.8.2 in my windows 11 laptop. Searching in the toolbox of qgis the words "SAGA" it shows this: What should i do in order to be ...
George Ang's user avatar
1 vote
0 answers
64 views

ModuleNotFoundError: No module named 'PySAGA'

I am trying to install the SAGA GIS python bindings on ubuntu 22.04. I have successfully installed SAGA on my computer and have it running on my QGIS install. However, when I try to import the python ...
LaserGlaciers's user avatar
0 votes
0 answers
166 views

QGIS: Flow Accumulation Tool not progressing past 100%

I'm trying to do run the flow accumulation tool on a map where I am trying to extract drainage from a DEM however it has been stuck at 100% for several hours. I have put details of the files I am ...
Kcoj's user avatar
  • 1
0 votes
0 answers
34 views

Channel network from DEM of a river has unusual linear lines

So I needed to obtain channel network, basins, flow direction, etc. I downloaded aster_DEM from usgs, clipped it to an extent, warped it to UTM projection, then filled the sinks using Wang and Liu ...
SHAISHAV ACHARYA's user avatar
1 vote
0 answers
48 views

Linking Point input data with SAGA Upslope input in QGIS Modeler

I have a model set up with a point input. I need the point's x and y coordinate data to populate the x-value and y-value fields required as input for the SAGA upslope function. I have tried various ...
Louw's user avatar
  • 11
0 votes
1 answer
41 views

Problem with SAGA batch processing

I have a series of point clouds in LAZ format that contain points identified as ground. I want to interpolate these points with the Multilevel B-Spline algorithm of Saga GIS and export the clouds to ...
Gerardo Jimenez's user avatar
0 votes
0 answers
132 views

Why does SAGA plugin "Channel Network and Drainage Basins" fail with the addition of one specific DEM tile?

I am working on developing a stream network and watershed layer in QGIS. I have 1047 DEM tiles I downloaded from NC (https://sdd.nc.gov/). When I try to run the plugins on the entire set (see attached ...
jerm's user avatar
  • 1
2 votes
1 answer
470 views

PCRaster Tools, GRASS and SAGA installation on QGIS 3.34.2 for MacOS

I have followed the instructions here https://www.youtube.com/watch?v=RaFrXzw7IvI to install PCRaster Tools via conda, which is working. However it appears that all of my previously installed packages ...
Justine's user avatar
  • 21
0 votes
1 answer
135 views

SAGA in QGIS using SAGANG shows errors: Library not loaded: '@rpath/gdalplugins/3rdparty/libltidsdk.9.dylib')

Running SAGA algorithms from QGIS throws up a list of errors about not being able to load a GDAL plugin libltidsdk.9.dylib: ERROR 1: dlopen(/Applications/QGIS.app/Contents/MacOS/lib/gdalplugins/...
kbjshop's user avatar
  • 63
1 vote
0 answers
108 views

SAGA processing and special characters

I’m using some SAGA processing for vector layers in QGIS. Is it a way to change the default encoding in SAGA? I have attribut value with french characters (é, ê, à) and after a SAGA Union, they are ...
katagena's user avatar
  • 1,678
0 votes
0 answers
36 views

Problem Polygon Line Intersection - SAGA QGIS

I have a ShapeFile with a series of polygons (ex: the yellow line is the common boundary between 2 polygons). I have another ShapeFile that contains a line (Pink) which crosses the limit line of these ...
Macnamara's user avatar
0 votes
0 answers
28 views

saga_cmd - process never ends

I am trying to use saga_cmd with the debian 11 (package v7.3.0) to create an interpolation process. With Qgis, the process take around 1 minute and works fine, but the process seems never ends with ...
Gaet's user avatar
  • 309
0 votes
0 answers
114 views

Problems with the SAGA Next Gen Tool "Resampling Filter"

When running the Saga Next Gen tool "Resampling-Filter" I get the error message: failed: could not find a suitable import driver**" and "**[Import Raster] Execution failed (less ...
Adrian's user avatar
  • 1
0 votes
0 answers
42 views

Not able to get results with SAGA's regression tools

I'm trying to find in QGIS an analogous tool to ArcGIS's "Ordinary Least Squares". The tool takes in a shapefile, where the dependent variable and independent variables are all fields in the ...
Entorno's user avatar
2 votes
2 answers
2k views

Installing SAGA next gen binaries in QGIS on a Mac

I am trying to use SAGA NextGen on QGIS and every time I try to run a program it has an error message saying that I need to update my SAGA binaries to 9.1. I am using QGIS 3.23.3 on MacOS. I have also ...
Scott's user avatar
  • 21
0 votes
1 answer
118 views

QGIS Strahler Order Too Many Stream Channels

I have this DEM file and I'm trying to extract possible rivers/streams from it. However , when I run Strahler Order as tutorials on youtube indicate, the output shows too much lines that aren't really ...
cheesetrap's user avatar
1 vote
0 answers
84 views

SAGA cannot load any grids

Whenever I try to use a SAGA processing tool in QGIS which requires loading a file, it fails to load the files. The log message says: Loading grid: [PATH] failed. The tools I've attempted to use ...
Jacky's user avatar
  • 11
0 votes
1 answer
54 views

SAGA - Raster statistics for polygons is not working

I would like to generate the raster statistics for one polygon with the raster tool "Raster statistics for polygons". The first try: My data is this GeoTIFF and a Polygon both in EPSG:25832. ...
Kai's user avatar
  • 33
0 votes
1 answer
309 views

Trouble installing SAGA 7.2.0 in Ubuntu 22.04 to use with QGIS 3.22

I am trying to install SAGA 7.2.0 to use with Saga NextGen Provider in QGIS 3.22. However, the version on the Ubuntu aptitude repo is SAGA 7.3. I've tried building from the official saga-7.2.0.tar.gz, ...
Ricardo's user avatar
  • 21
0 votes
0 answers
71 views

Multiprocessing passing a PySwig Object

I am trying to do some multiprocessing in Python using the PySAGA module. In order to avoid having to load the input raster for each worker I am trying to pickle the loaded raster to the ...
Hans Baumann's user avatar
0 votes
0 answers
42 views

SAGA Gaussian Filter Results Stretched

New to a lot of these tools, so it's possible that I'm simply misunderstanding how to use them. I have a world raster of population data (1px=1km) that I'm trying to generalize (It's for children so ...
Grant Hubert's user avatar
1 vote
1 answer
224 views

Import .tif file in SAGA GIS

While importing the .tif file through Geoprocessing -> File -> Grid -> Import ->Import Image, I am getting the following error in SAGA GIS 7.8.2. 12:27:37 PM: Unknown field with tag 33550 (...
GIStree's user avatar
  • 91
2 votes
2 answers
2k views

SAGA option (Fills SInk) option not available in QGIS Toolbox

How do I derive a river network and catchment from a DEM using QGIS? I'm using the latest version of QGIS 3.30.3 and in it, the SAGA tool (and consequently, the Fill sinks option) isn't available in ...
Riban War's user avatar
0 votes
0 answers
258 views

Calculating TPI (topographic position index) and TRI (topographic ruggedness index) in QGIS

I know there are similar questions regarding the computation of TPI and TRI. However, I found myself a bit lost in how to perform the calculation in QGIS. So, I have DEM, and the projection is set to ...
mamici24's user avatar
0 votes
2 answers
78 views

SAGA intersect syntax for QGIS

I cannot find the exact python syntax for saga:intersect anywhere. The following throws "Could not load source layer for A: no value specified for parameter". It prints laender = QgsProject....
MoritzMoreira's user avatar
2 votes
1 answer
608 views

How to resolve the watershed delineation failure in QGIS due to NO DATA values in 'Flow Direction File'?

How can I resolve the issue of getting errors while delineating a watershed in QGIS? I have tried using different DEMs (ALOS and Cartosat), but I am consistently encountering NO DATA values in the ...
dsbisht's user avatar
  • 695
1 vote
1 answer
87 views

Problem with Basic Terrain Analysis in SAGA

I am trying to compute LS factor for UAE in SAGA with Basic Terrain Analysis tool, but it always show the same problem "could not initialize data objects".
Bokhir Alikhanov's user avatar
0 votes
0 answers
234 views

Export GPX files from QGIS/SAGA that are compatible with Garmin Connect

GPX files exported by QGIS using SAGA do not seem to be accepted by Garmin Connect (web interface). Exporting GPX files via saving a QGIS GPX Layer loses the layers, so I'm using the SAGA export tool. ...
Jona's user avatar
  • 41
0 votes
0 answers
507 views

SAGA GIS - regression kriging

I have a problem with regression kriging in SAGA under QGIS. It gives me an error - could not execute the tool. I want to create temperature maps from data set of meteorologic station and DEM. I have ...
Lucie's user avatar
  • 1
3 votes
0 answers
147 views

The following layers were not correctly generated grid calculator

I'm doing an assignment for a mapping class and I'm literally stuck trying to create a DEM file using the grid calculator under SAGA. I'm following the directions we were given and I have searched for ...
Jamie's user avatar
  • 61
1 vote
1 answer
25 views

Concatenation of commands in SAGA grid calc

My goal is to mask pixels with chosen value, for example if g1 is equal to x1,x2,x3 the resulting pixel has to be set to 1 otherwise to 0. Through grid calculator I've tried this command: eq(g1, (x1 ...
Marco Prandi's user avatar
1 vote
0 answers
27 views

SAGA 8.5.1 cmd not working on Linux RStudio Server RedHat 7.9

Trying to run saga_cmds on RStudio Servier but cant get saga_gis() to work. SAGA Version 8.5.1 cmd not working on Linux RStudio Server RedHat 7.9 library(Rsagacmd) > saga <-saga_gis(...
andrew's user avatar
  • 11
0 votes
1 answer
174 views

SAGA Majority Filter output error

I have a simple raster dataset (GRASS topidx) that has been rounded down, so all the cells are integers. When I use the SAGA Majority filter in QGIS, the cells are no longer integers. I have modified ...
Dr Richard Langford's user avatar
1 vote
1 answer
67 views

Iterating SAGA Split Features Layer tool across files in directory using python

I have a few thousand polygon shapefiles in a folder that I would like the SAGA Split Features Layer tool to perform its operation on. The operation and parameters are the same for every polygon, but ...
MJM's user avatar
  • 995
0 votes
0 answers
259 views

Unable to run SAGA-Terrain Analysis-Fill sinks (wang&liu)

I am trying to do a Watershed analysis using QGIS. However if I want to run the SAGA function Fill sinks (Wang & Liu) I get an error that the 3 files were not created (full error down below). I ...
Gnoebbas's user avatar
1 vote
0 answers
117 views

TWI (Topographic Wetness Index) The following layers were not correctly generated [closed]

QGIS version: 3.22.9-Białowieża QGIS code revision: a8e9e6fae5 Qt version: 5.14.2 Python version: 3.8.7 GDAL version: 3.2.1 GEOS version: 3.9.1-CAPI-1.14.2 PROJ version: Rel. 6.3.2, May 1st, 2020 SAGA ...
Agie Gizawi's user avatar
4 votes
1 answer
215 views

Removing dropped line using fourier transformation?

I've noticed a 'dropped line' in only one band of SPOT MS image, as seen similar to added example. By applying fourier transformation to the band in SAGA GIS, the dropped line can be clearly spotted ...
Dave's user avatar
  • 1,218
3 votes
1 answer
1k views

QGIS 3.16, 3.22. SAGA tools not working. ERROR: Loading resulting layers The following layers were not correctly generated

I've tried multiple SAGA processing tools (Tools tried include: "clip raster with polygon". "Fill sinks Fill sinks (Wang and Liu)". "Polygon Centroids.". It seems that ...
Vilhelm's user avatar
  • 41

1
2 3 4 5
13