Questions tagged [iteration]
Repeated execution of some groups of code statements.
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Issue with Iteration/Unique Naming in QGIS Model Building
this is probably a straightforward problem, but I am a beginner at QGIS and having trouble fixing it.
The Task
I am trying to use a vector of polygons as masks to individually cut out snips of a ...
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Creating QGIS projects with iteration using PyQGIS - Problem with the location of layers added
In the following PyQGIS script, I iterate through each shapefile in input_directory, where each file represents an individual prefecture. To manage project isolation and ensure clean operations, I ...
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Iteration of daily Fire Weather Index (FWI) calculations for the region of interest in Google Earth Engine
I decided to find out how the FWI index works for operational monitoring of the fire situation in the region. This is my first project on Google Engine and my programming knowledge leaves much to be ...
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Iterating over .getFeatures()
I've selected some polygons and created bounding boxes for them, then generated buffers. Now, I need to export each buffer to a separate .gpkg file. However, this loop saves all buffers multiple times ...
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Using PyQGIS to iterate through layers with custom layout
How do I select the layer and apply a layout for export to .PNG?
I use: QGIS 3.34 and the Python Console.
So the manual process is: select layer => go to Layout Manager => Select Layout => ...
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Mapping, Iteration and conditional selection on featureCollection in GEE
I want to make a function (possibly using Currying method) in GEE to do a modification of my featureCollection. In the code bellow I wrote a function_infunction to add a new property "label" ...
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Adding iterative group of algorithms to QGIS model
In a QGIS model, I have a section in the workflow where a certain group of algorithms (let's say: do A, then B, then C, then D: see below for details) has to be re-run until a condition is met. So ...
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QGIS Shortest Path Iteration
I have a large QGIS Fiber to the Home (FTTH) design with 727 address, my focus here is on the Lateral sections from the homes to the Handholes (shown in green).
The design roughly breaks up to four ...
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Change to unique layer name when Iterating over a set of layers
I am using the Clip algorithm with the 'Iterate over layers' option, which works great, but the output names are just 0 - 17, which isn't terribly helpful, as I don't know which shapefile is ...
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Loop through fields in QGIS calculator with condition: count fields with values >0
I have a dataset, a polygon, with several columns, let's say:
Site
Species1
Species2
Species3
1
85
23
90
2
73
20
0
3
0
0
0
4
0
0
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0
75
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I have different sites and data about several ...
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Using "Subdivide Polygon" in ModelBuilder with an iteration via the split angle (value from input feature class) to split polygons in their centres
I have a lot of polygons that I would like to split automatically in the centre/into two equal parts in ModelBuilder. My idea was to first determine the orientation of the polygons using the Minimum ...
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Setting output layer names in processing algorithm with stepwise parameter increment in QGIS
I run a processing algorithm in QGIS in an iteration with a stepwise parameter increment from numeric model input A (minimum) to numeric model input B (maximum) by a fixed step size.
Here's what the ...
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ArcGIS Pro ModelBuilder Rename invalid characters
I want to take all shapefiles within a folder, import to a new gdb, and iterate several processes. Including rename, add and calculate fields, then define the projection. I keep running into issues ...
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Iterate feature classes then clip, but skip if output is empty
I want to make a ModelBuilder tool that takes shapefiles from a specific folder and clips them. The shapefiles cover an entire country and I have to clip them to project areas when we have new ...
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Model Builder - Iterate user selected KML files as input - NOT a folder as input
I am trying to create an iterative KML to layer geoprocessing model.
The goal: I want to prompt the user to select specific .kml files in a directory to process as well as prompt for the output folder....
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