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Geographic Information Systems : Recent Questions and Answers (Page 27)

Find answers to your questions about Geographic Information Systems or help others by answering their Geographic Information Systems questions.

Duplicate print composer or use template?

I want to duplicate a print composer in a project to use with a different atlas coverage layer but I am having problems generating the atlas. I have tried to...

Asked on 11/09/2021 by B_Dabbler

1 answer

Getting layer extent in PyQGIS?

I'm trying to write a processing script using grass r.neighbors algorithm for rasters. When you use the Gui for this algorithm, you can leave the GRASS layer extent field blanc...

Asked on 11/09/2021

3 answer

ST_SnapToGrid takes a long time on

My ultimate goal is to fetch all points from a 4 million record table that fit within a given rectangle and group the results in clusters. All of the queries...

Asked on 11/09/2021

1 answer

What is the proper way to calculate distance in km from degrees

For a genetic analysis of Australian humpback dolphins I am currently trying to assess whether or not genetic differentiation correlates with geographic distance in water. For this I have done...

Asked on 11/09/2021

3 answer

GeoServer NetCDF store error

I have a problem with adding a new NetCDF store. I use NetCDF plugin for GeoServer. The error is displayed below: Message...

Asked on 11/09/2021 by Saša Vranić

2 answer

Confusion matrices for two lists of raster objects

I have two lists of raster objects. One contains validation plots and the other contains results from a random forest binary classification of those plots. I would like to...

Asked on 11/09/2021 by RandomForester

1 answer

NDVI calculation

I am a newbie in PyQGIS. I start to write my own simple code to automatically calculate NDVI from Landsat 5. Here is my code: from PyQt5.QtGui import *from...

Asked on 11/09/2021 by PiyaphatC

1 answer

No method or default for coercing "sf" to "SpatialPoints"

I keep getting the below error message when I try to use R in QGIS. For example Monte Carlo or Quadrant. I use a point shape file with the...

Asked on 11/09/2021

2 answer

How to plot shapefile in R

I am trying to plot a shapefile on top of a raster using the command readOGR. My current code is: CEZ <- readOGR(".", "Shapefile/CEZ1")This is followed...

Asked on 11/09/2021

1 answer

r.green error installation on GRASS

I am using GRASS GIS 7.0.3 on linux, however I've been trying to install the r.green extension on GRASS and always get the error message: "ImportError: cannot import name set_path"...

Asked on 11/09/2021 by Anissa Nur Irmania

1 answer

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