Geographic Information Systems Questions, Problems & Solutions : TransWikia.com ~ Page 11

Atlas export using Python: AttributeError: 'NoneType' object has no attribute 'atlas'

I'm trying to export my atlas layout named "Atlas_png", but are getting the error: AttributeError: 'NoneType' object has no attribute 'atlas' (line 27).I have tried to use this examples:...

Asked on 12/10/2021

0 answer

Combining overviews for large multiband raster image

I have several large rasters, complete with overviews. I have combined these as separate bands of a multiband virtual raster. However, QGIS performs very slow viewing this vrt. Is there...

Asked on 12/10/2021

1 answer

Geopackage sync to onedrive slow

I am using Geopackage stored in a folder using Onedrive.Everytime I want to modify my file in QGIS (3.12), it is freezing and onedrive is notifying errors in synchronisation...

Asked on 12/10/2021

1 answer

Converting a FLIR image CSV to TIFF using Python

I have a geolocated CSV file containing one lat, long coordinate for the entire thermal image. I would like to convert this CSV to a TIFF using Python so that...

Asked on 12/10/2021

1 answer

Techniques for point-level speed calculation from GPS traces

I am working with a GPS dataset where GPS speed is not available, only the lat/lon coordinates and timestamp. Currently, I calculate point-level speed from rate of distance between two...

Asked on 12/10/2021

1 answer

Understanding what levels to use in gdaladdo

I am trying to understand how tiles overviews and levels interact using GDAL so i know how to use it appropriate and optimize my rasters to use either in QGIS...

Asked on 12/10/2021

0 answer

QGIS GDAL Vectorinformation: Can only extract one layer of the geopackage while I want all

Currently I am trying to extract vector information with the GDAL Vectorinformation tool on a geopackage. The problem is I only get one layer extracted out of the geopackage while...

Asked on 12/10/2021

0 answer

Exporting attribute table to Excel from QGIS?

I have seen all the questions for how to export an attribute table to Excel from QGIS, and I try all the answers like copy paste, CSV (in fact this...

Asked on 12/08/2021

8 answer

Multiplying rasters by integers in processing modeler

I need to multiply several rasters by integers as a part of a multiple steps process. For this reason I'm using QGIS' Processing Modeler. I'm looking for something similar to...

Asked on 12/08/2021

1 answer

Deleting values less than 0.31 in NDVI raster layer in QGIS

In my research I have a Ndvi raster layer, and I want to delete the values corresponding to bare soil, which are those minor of 0.31. Therefore, I will obtain...

Asked on 12/08/2021

2 answer

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