Questions tagged [image-classification]
Image classification refers to the task of extracting information classes from a multiband raster image.
-1
votes
0answers
18 views
Reviewing IDL code for performance?
I made a program in IDL for performing a minimum distance classification on multispectral satellite data. This is what my main function looks like
function minimum_distance, stack, exercising_data
...
0
votes
0answers
7 views
Calculate distance between multiple arrays and landsat bands in IDL
I have a set of landsat 7 layers, that look like this:
files = [ $
"D:\ArcGIS\Programmieren in IDL\Landsat Daten\landsat_b1.tif" $
,"D:\ArcGIS\Programmieren in IDL\Landsat Daten\landsat_b2.tif" $
...
1
vote
1answer
51 views
How to obtain percentiles of classes in classified image in Google Earth Engine?
https://code.earthengine.google.com/e430e2a79aecb65e3efbce23779a0abc
I have written this code for supervised classification using the cart classifier.
Now I want to extract the no. of pixels in each ...
3
votes
1answer
56 views
Performing Supervised Classification of Houses in Africa using ArcMap?
I am doing a supervised classification in ArcMap to classify land cover types in a study area in Africa. I am using RapidEye satellite imagery (Planet Labs) and they have 5 bands: blue, green, red, ...
1
vote
0answers
39 views
Unsupervised classification in ERDAS imagine
I am trying to make a classification to run some index ( like NDVI) to see the change over time using the image difference function. Is it possible to do an unsupervised classification on one image ...
1
vote
0answers
48 views
Supervised classification with only one class with Google Earth Engine
I am a beginner with geospatial analysis and Google Earth Engine. I am trying to classify only one class of Landsat 5 image (swimming pool). I got several training sites and applied the classifier. As ...
0
votes
1answer
77 views
Is there machine learning for image classification in ArcGIS 10.3?
I have access to ArcGIS 10.3. Do I need to get ArcGIS Pro to have access to machine learning?
I've read that this is a built-in function in ArcGIS Pro.
links:
http://www.esri.com/esri-news/arcuser/...
1
vote
0answers
62 views
Using output of unsupervised cluster analysis to train supervised classification for vegetation mapping?
I'm using Google Earth Engine to classify mangrove forests from Landsat imagery to calculate extent. Let's say I perform an unsupervised K-means cluster analysis on a Landsat scene to identify general ...
0
votes
1answer
65 views
Incorporating NDVI and texture metrics in OBIA-Supervised Image Classification
Anyone knows step-by-step tutorials for incorporating NDVI and texture metrics in land cover classification with ArcMap?
I've been doing supervised classification of Sentinel-2 with the assistance ...
0
votes
1answer
28 views
Area of classified pixels in an image collection
I am using Monthly History data of the Global Surface Water dataset (Asset id: JRC/GSW1_0/MonthlyHistory).
I have filtered the images using .filterdate and .filterbounds for my region of interest (...
1
vote
0answers
34 views
Color different of two Sentinel 2A (L1C) images from the same sensing date
i'm new to this GIS Q&A websites and remote sensing as well, so sorry for this too basic question. It's about my Sentinel 2 (Level-1C) images. I downloaded 2 images with the same sensing date (09-...
0
votes
1answer
38 views
Know of any existing quality training/validation datasets for land cover?
Looking to do some moderate res. global land cover mapping and need as much training and validation data as possible--does anyone know of any good/quality land cover/land use data that are freely ...
0
votes
0answers
28 views
Use raster calculator on an Image Service in ArcMap or ArcGIS Pro
I'm mapping the approximate polygon shapes of dirt roads in a large area.
I can see the roads clearly on the world imagery basemap and on the USA NAIP image service.
Can I use Raster Calculator to ...
1
vote
0answers
103 views
QGIS Semi Automatic Classification SCP Plugin Runtime Error
I am using Landsat 8 satellite imagery for doing Supervised Classification using Semi Automatic Classification Plugin (SCP) in QGIS.
I have created ROI's and done all the procedures for doing the ...
1
vote
1answer
23 views
Is it possible to see which Landsat bands were used most, when creating kmeans clusters?
I am using kmeans clustering (ee.Clusterer.wekaKMeans) to classify a Landsat8 image using all 11 bands. I was wondering if it is possible to see what bands are relied on most to create the clusters (i....
-1
votes
2answers
65 views
Supervised Classification Imagery for rooftops
I'm trying to do a supervised classification in ArcPro that will allow me to find Tar and Gravel rooftops in Miami. I have Landsat data but just wondering if there is imagery out there with better ...
0
votes
1answer
163 views
GEE: Supervised Classification exceed memory
I am trying to do a supervised classification using Landsat images, DEM, Slopes, NDVI, etc. Is there any way to do not exceed memory limit?
https://code.earthengine.google.com/...
0
votes
0answers
39 views
What indices work best for entropy computation for classifying lone standing trees?
Question:
What bands or indices work best for entropy analysis of lone standing trees?
Problem:
In Google Earth Engine, I created a landcover classification for semi-arid africa with good accuracy....
1
vote
1answer
149 views
Orfeo TrainClassifier tool not working in QGIS
I have been using Orfeo Toolbox with QGIS (version 2.18.0) to do image classification.
I was following this tutorial on YouTube on the SVM classifier. I have followed steps 1 and 2 as described, and ...
0
votes
1answer
70 views
Supervised Classification using Remote Sensing data?
Is there a correlation between the time that supervised classification takes to execute and the training areas that we choose?
Perhaps if we take larger areas for classification will the ...
1
vote
1answer
209 views
About support vector machine classification
I want to classify Sentinel 2 images with the SVM in orfeo toolbox in QGIS.
I have made a ROI (2 classes) and use TrainImages classifer (libsvm). I have made a SVM model,but when I use ...
1
vote
1answer
268 views
eCognition TTA Mask : Aerial images in ecognition for supervised classification
I am using eCognition Developer Trial 8.0. I have rgb Drone Otho foto. We want to classify this image for various biotope types exist in that region. We have already an existing classification as a ...
1
vote
0answers
83 views
i.cluster command with GRASS GIS
I am trying to do an unsupervised classification using GRASS GIS software. I have hyperspectral photo and now analyzing vegetation indices. Here is what I did:
Created 2000+ raster photos with ...
3
votes
2answers
2k views
Performing deep learning land cover classification using R?
I am really new to Deep Learning and, unfortunately, I can't find example codes on land cover classification other than this one where the author wrote a script in R for a large dataset.
The main ...
1
vote
1answer
493 views
How do I manually edit raster layers on QGIS 3.0?
Main question: How do I manually edit raster layers on QGIS 3.0?
Some context: I georeferenced Google Earth high resolution downloads on to QGIS, and was looking to do image classification for a ...
3
votes
1answer
626 views
Exporting classification error matrix Google Earth Engine
I did a supervised classification of land cover and I need to export the Validation error matrix to .csv file. When using 'Export.table.toDrive' an error message 'Invalid argument: 'collection' must ...
2
votes
1answer
49 views
Can mosaic dataset be used as input to ArcGIS Pro's Image Classification Wizard?
I am currently not licensed for the Image Analyst or Spatial Analyst extensions of ArcGIS Pro. However, I am contemplating trialling/purchasing Spatial Analyst to perform image classification on a ...
1
vote
0answers
76 views
Jpeg Image Classification
I want to perform Image Classification(JPEG Image).
I loaded the image in QGIS.
Everytime i perform an action, i get a screen pop-up of Co-ordinate Reference System(CRS).
How should that be handled?
...
0
votes
1answer
162 views
Beginning Image Classification? [closed]
I'm a beginner with remote sensing and have the task of creating a land use/land cover map of a region in India from IRS imagery. I've never performed an image classification before, although I do ...
4
votes
0answers
116 views
Appropriate resolution of images for image classification? [duplicate]
I am attempting to perform image classification on some maps that I have in PNG format. This classification is failing due to there being too many many pixels in the training samples (I appear to be ...
