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Geographic Information Systems

Questions tagged [image-classification]

Image classification refers to the task of extracting information classes from a multiband raster image.

29 questions
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How to classify the study area into five classes with Landsat images? [on hold]

How to classify the study area into five classes with Landsat images? Please send the code.
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1answer
38 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/...
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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 ...
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1answer
37 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 ...
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1answer
19 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 (...
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23 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-...
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22 views

Multi-temporal classification steps

Please could someone advise me on the steps to carry out a multi-temporal classification on sentinel -2 images in QGIS? I am working on a classification for crop types in an area. Up until now I ...
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1answer
25 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 ...
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22 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 ...
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0answers
53 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 ...
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89 views

Random Forest Classification with big amount of training data (EuroSAT dataset)

I'd like to conduct a supervised Image classification of Sentinel 2 Scenes (multitemporal). I'd like to use the Option 'Train on raster' in order to use raster data as Training data. I've read about ...
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23 views

Unsupervised classification raster

I'm a novice when it comes to image classification and was hoping for some advice. Specifically, ive experience in clustering of geochemical and hydrochemical data. Hard (HCA and K-Means) as well as ...
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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....
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2answers
49 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 ...
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19 views

No data was found in classifier training input afer run code in GEE

I want to classify images using three types of sample data, including yumi, xiaomai and youliaozuowu, but it shows this error 'Class: Layer Error: No data found in the classifier training input'after ...
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1answer
50 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/...
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27 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....
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1answer
88 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 ...
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1answer
65 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 ...
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1answer
126 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 ...
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1answer
134 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 ...
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0answers
48 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 ...
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2answers
977 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 ...
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1answer
220 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 ...
2
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1answer
379 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
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1answer
41 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 ...
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0answers
66 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
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1answer
153 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 ...
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0answers
114 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 ...