Lisa Maria Ganter

3 Questions 10 Answers 0 Followers

Questions related from Lisa Maria Ganter

What are the disadvantages of stratified random sample?

I am thinking of using a stratified random sample of my models from the raster package in R. I can see the advantages of stratified random samples, as it is easier to sample smaller classes as...

09 September 2018 8,756 7 View

Number of stratified sample for validation of classification? Does it need to be proportional?

I have a landuse classification and want to do an external validation of it (which is not based on the training data). Because 1 of my 3 classes is really rare, I cannot safely implement a random...

09 September 2018 8,449 6 View

How to remove single pixels in classification with Salt and Pepper effect?

I wonder how I can remove single pixels (and double pixels) in a classification raster. I read in one thread that this might be done by moving windows of 3x3 or 5x5 pixels and i can filter out and...

06 June 2018 8,687 7 View