All Questions
785 questions
1
vote
0
answers
32
views
Batch uploading rasters to PostGIS, slows way down
Problem (or at least I think it is a problem): If I set the raster folder to include 3 or 4 GeoTIFFs of ~ the same size and the 1st one uploads in 30 minutes, why would the next one take 90 minutes?
*...
- 11
1
vote
0
answers
36
views
Opening .img file created in Erdas Imagine 2023 in Erdas Imagine 2022
I am having an issue working with a file created in Erdas Imagine 2023 in Erdas Imagine 2022. I ran a tool with the output .img. However, the .img format seems to be different in Erdas 2023 vs Erdas ...
- 11
0
votes
0
answers
50
views
Computing bilateral travel times between Belgian municipality per travel mode in 1896
I'm conducting an historical study concerning the impact of the first railways on structural transformation of the 19th century Belgian economy (i.e. industrial revolution).
A part of my analysis is ...
- 1
0
votes
2
answers
142
views
How to batch import geotagged photos into QGIS?
I did some flights with a DJI drone over an area a few kilometers long, and I would like to batch import the hundreds of geotagged photos into QGIS. I have tried the ImportPhotos Plugin but the photos ...
- 345
5
votes
1
answer
357
views
QGIS Batch Process to save bands of a raster layer as separate raster files
I have a .tif file with 61 bands. Normally, to save a band, I use the rastar calculator expression filename@1. But since there are 61 bands, with each band corresponding to a date, from April 1 to May ...
- 105
1
vote
3
answers
507
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 ...
- 21
0
votes
0
answers
43
views
Compressing clipped rasters (batch process) in QGIS
I am brand new to QGIS. I need to clip and compress 30 drone rasters. I do not know how to enter the command into the batch process window to compress the images. Right now, the only settings I have ...
- 1
0
votes
1
answer
55
views
How to use gdal calc.py for batch processing in MAC OS [closed]
I have .tif files for Novemeber starting from 2001 to 2020, with values ranging from 1-255. I only want values from 1 to 100 and anything above 100 as NoDataValue. I was able to execute the code for a ...
- 105
0
votes
1
answer
47
views
Batch export individual monthly rasters from a raster stack in Google Earth Engine
I have the following code where I am exporting monthly images (all bands included) for the year 2018:
var collection = ee.ImageCollection("NASA/HLS/HLSL30/v002")
.filterBounds(table);
...
- 1,167
0
votes
0
answers
115
views
QGIS append layer in one geopackage output of modeler
I would like to append new layer (created with model builder) to a new/existing geopackage in a batch processing. Tried with 3.36RC and 3.34.4 LTR.
Every line is a csv converted to point
Every line ...
0
votes
1
answer
83
views
Zonal statistics batch process using QGIS
I am working with QGIS 3.34.3-Prizren and I carried out a rasteranalysis using zonal statistics batch process. I have some problems choosing the right autofill settings for the column spatial ...
0
votes
1
answer
55
views
Multiple step function tasking with PyQGIS [duplicate]
Running a function in QGIS (example - "native:geometrysmooth") on a single shapefile, I can copy the 'Python Command' once setup and replicate this to run in the Python Console for a single ...
- 3
0
votes
0
answers
13
views
GeoNetwork config-editor.xml-- what does the content in the batchEditing section do?
I can't find any documentation to explain what the batchEditing content in the config-editor.xml file does. Can anyone provide some guidance?
0
votes
0
answers
46
views
What data does clustering use from multiple raster files?
I currently have a series of rasters of the same area across different times. The data is categorical: the product of a supervised classification used on LANDSAT data run on ERDAS Imagine. Each ...
- 23
0
votes
1
answer
160
views
Using Merge in ModelBuilder of ArcGIS Pro
I am relatively new to ModelBuilder.
I am trying a basic task using the merge function.
I have a folder which consists of a lot of shapefiles. Each shapefile from the folder needs to merge with file '...
- 1
1
vote
1
answer
97
views
Change select color in a raster in QGIS using Serval or Value tool
Is it possible to edit the table view of a raster that you see in the Value tool?
Alternatively
Using Serval, once we have a selection polygon can we choose a specific range of raster values within ...
- 8,298
2
votes
1
answer
109
views
Does QGIS have a functionality similar to Flicker in Erdas Imagine?
I am trying to replace an Erdas Imagine workflow with QGIS and I have got most of it working but can't find a solution for fliker. We have it set to turn an image on and off every few seconds to ...
- 8,298
0
votes
0
answers
34
views
Erdas - Export LUT Instead Of Real Values
I am using Erdas 2022.
I have NDVI index of an imaging, and after creating it, the view shows a LUT which is not the original pixels, which is essentially the automatic stretching of the program.
I ...
- 101
2
votes
0
answers
49
views
Batch processing with "Points to Path" in QGIS
I am trying to run "Points to Path" on a set of points files. When I do it one file at a time without batch processing, it is fine and works as expected.
However, even if I try batch ...
- 21
0
votes
0
answers
36
views
How to batch export .tif and .shp from TNTmips RVC folders?
We have approximately 600 RVC folders per year, for a 30 year period (repeated visit of plots), that contain both georeferenced aerial images and vector mapping of wet areas via heads up digitizing. ...
- 451
0
votes
1
answer
145
views
Batch Task Execution of a Feature Collection in Google Earth Engine
I have generated a Feature Collection for a geometry with 6 polygons. Formatted the table and then exported the first three feature collections having over 1000 properties. However the last batch file ...
- 11
0
votes
0
answers
46
views
Excluding 'No Data' Pixels When Counting number of pixels in an AOI with ERDAS IMAGINE
I'm working with Landsat imagery in ERDAS IMAGINE 2014 and have encountered an issue with 'no data' pixels within my Area of Interest (AOI). The AOI includes unwanted 'no data' pixels that are ...
0
votes
0
answers
72
views
What does the metadata tell you about an image and its sensor?
I'm using a software called ERDAS and my tutor says that the Metadata can be used to detect which sensor your image came from. Is there anything you can tell me that links the metadata to the sensor?
...
0
votes
0
answers
22
views
Merging Subswaths with ERDAS Imagine
Does anyone have experience with merging subswaths of a SLC Sentinel 1 image in ERDAS Imagine? I cannot find the right function for it.
2
votes
1
answer
93
views
AttributeError in QGIS model during batchmode processing
I'm running a custom model from in batch mode. It has the following tools:
Raster Calculator
Polygonize (raster to vector) (GDAL)
Simplify
A lot of field calculators
Drop field(s) (the final tool in ...
- 888
7
votes
3
answers
1k
views
QGIS Batch processing stops part way through indefinitely for no apparent reason
When ever I run a batch process in QGIS, the processing will stop at a seemingly random step. It does not let me cancel the process and no error is reported. However, if I start the batch process ...
- 530
0
votes
1
answer
27
views
Abrupt error when trying to run model with viewshed as batch process
I am trying to run the following model as a batch process. In summary, I take a DEM raster layer and a number of individual points as separate .gpkg files in a directory (these points have been ...
- 783
1
vote
1
answer
30
views
Batch exporting groups of 100 polygons from shapefile into new layers using ArcMap
I have a shapefile of about 14,000 overlapping polygons that I need to separate into layers of 100 for processing purposes.
Is there a way to create these layers without manually selecting each group ...
- 11
0
votes
1
answer
350
views
QGIS Multiraster Zonal statistics for one vector
Is it possible to make one attribute table using zonal statistics for one vector and multiple rasters layers?
I would like to make chart for one field with five sectors (polygons) in that field and ...
0
votes
0
answers
30
views
Can I plot the individual style symbols/lines from a single layer to a PDF, and have the PDF have those different styles as different layers
I am working with a single layer. I assign the different features different attributes. Then I use categorized styling according to those attributes. In the layer window, these are easy to toggle on ...
2
votes
1
answer
116
views
Choose which outputs to open after batch processing in QGIS graphical modeller
I created a graphical model with many outputs. I need to test-run it many times to check the effect of some parameter choices on a single output. All other outputs would unnecessarily clutter my ...
3
votes
1
answer
452
views
How do I run a QGIS plugin on its Python API?
I have about 40 layers with attribute tables that have many NULL columns. I downloaded the plugin "Delete NULL Fields from Vector Data", which works. I'd like to automate it using the QGIS ...
1
vote
1
answer
424
views
Filling in attributes from a different layer in QGIS batch mode
I have a point layer with an X,Y field, containing the coordinates of each point separated by a comma.
I'm trying to batch process r.water.outlet based on these X,Y values from a different layer, the ...
- 13
1
vote
1
answer
208
views
GDAL (batch) compress .tif in place
I have a project where people are generating .tifs. Unfortunately, they often forget to compress, which results in unnecessarily huge files. Compressing them one by one is a tedious process, also ...
- 2,554
0
votes
0
answers
43
views
Batch processing clip tools
I am using QGIS 3.30
I have a Layer of 14 farms, digitised as polygons.
I have digitised polygons of 6 different land use types across these farms, with each land use in its own layer. Some of the ...
- 71
3
votes
3
answers
413
views
Batch export .QGS to .QGZ
I have multiple .QGS files and I would like to export them to .QGZ.
Right now I'm opening the .QGS file and save as .QGZ one by one, but I have over 180 .QGS files so I'm looking for a way to automate ...
- 81
1
vote
1
answer
92
views
Batch move points to specific updated coordinates in QGIS/PostGIS
For an archaeological project, I collected a huge amount of points coordinates in a PostGIS table using a GPS (3-5m accuracy). All points have a unique name.
After that I recorded all the points using ...
- 577
1
vote
0
answers
32
views
QGIS - Virtual Raster - Max number of grouped rasters [closed]
I'm facing an issue when I try to use the Virtual Raster process.
I'm asking to group 231 Raster, all located in different areas, not always concomitant.
The process is well executed, but the result ...
- 825
1
vote
1
answer
219
views
QGIS - Batch export of WMS into .tif
I'm trying to export several areas delineated with a Shapefile.
My Shapefile has different "id" and, for each id I want to export a raster (.tif) from a WMS layer (displayed with the plugin ...
- 825
2
votes
1
answer
121
views
How to put the end points with the same rows as the start points using shortest path tool on network roads - QGIS?
I have 2 point layers containing XY in qgis and I'm trying to get the shortest paths between each rows along a given network (row1 in first layer to row1 in second layer and so on). I used this ...
0
votes
0
answers
111
views
Opening images layer stacked on ArcMap into ERDAS
I noticed that ArcMap can open almost anything but if I do a band combination or a supervised or unsupervised classification on ArcMap I cannot open it on ERDAS.
Is there a way around it?
0
votes
1
answer
352
views
Unable to run standalone PyQGIS script with launch.bat file
https://www.qgistutorials.com/ru/docs/running_qgis_jobs.html
I want to run a script in a file called my_plugin.py.
The script is:
print ('Hello QGIS!')
The path for the script is:
C:\OSGeo4W\apps\...
- 303
-1
votes
1
answer
163
views
Batch change attributes in template properties in ArcGIS Pro
I am using a number of feature templates for mapping and would like to change a specific attribute in all templates with the same value without going through the list and change every single feature ...
- 99
2
votes
0
answers
653
views
Does the Census Bureau's geocoding API limit request frequency?
I am trying to batch-geocode about 8 million address records using the Census Bureau's batch geocoder. I am currently doing so sequentially, which takes about a day to complete. I was considering ...
1
vote
0
answers
161
views
Making shortest path for number of each points with link layer in QGIS
I want to make shortest path for a number of each points with a link layer in QGIS.
Now, shortest path tool have to click the start point and end point one by one.
But I have 2,000 pairs.
So I want to ...
- 11
1
vote
4
answers
742
views
Most efficient way to perform rastercalculations with GeoTIFF and/or ErdasImagine files greater than 100gb
I have many GeoTIFFs ranging from 50-300gb and expect I'll have some even larger in the near future. I running a simple subtraction on a pair 77gb 1-band files, but I will also have similar 6-band ...
- 151
2
votes
1
answer
183
views
How to export images through Layout Manager by switching the display of categorized render one by one
I recently started using QGIS to create distribution maps of organisms. OS is Windows 10, and QGIS version is 3.24.1.
What I want to do is how to export a large number of images by switching the ...
1
vote
1
answer
2k
views
Intersect/overlay multiple geodataframes from list using python (geopandas)
I am trying to overlay multiple gdf from list at once.
I have tried this code:
GDF_list = [gdf_1, gdf_2, gdf_3, gdf_4]
for DVP in GDF_list:
DVP = gpd.overlay(gdf, GDF_list, how='intersection')
...
- 121
0
votes
1
answer
314
views
Importing multiple txt files using PyQGIS
I'm using QGIS v3.26, and cannot seem to get code referenced from another Q&A to work. This is the previous Q&A on this topic that I was looking at: How to create multiple QGIS layers from ...
0
votes
1
answer
1k
views
Unsupported compression type in ERDAS imagine Software
Am trying to load a Landsat band but I keep getting the error of unsupported compression type, what might be the problem?
- 3