Questions tagged [classification]

The process of sorting or arranging entities into groups or categories; on a map, the process of representing members of a group by the same symbol, usually defined in a legend.

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What is the convergence threshold for ArcGIS Iso Cluster?

The ArcGIS tool Iso Cluster Unsupervised Classification does not seem to have any documentation on the convergence threshold used in the tool. To compare, Erdas Imagine has all of the necessary ...
Aaron's user avatar
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7 votes
1 answer
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Results of Variable Importance of RF Classifier in GEE

I create a RF module in GEE like this: //Random Forest Result Function Module exports.getRfResults = function(image, title, bands, trainPoint, testPoint, area, label) { //Create Sample Points ...
BerkayOzen's user avatar
6 votes
0 answers
2k views

Running OTB Random Forest Classification

I am having trouble processing a satellite image using the RF (Random Forest) classification, that is a machine learning algorithm in the Orfeo Toolbox of QGis 2.18.1. When I run the Tool, the ...
Yannick Arthur DOUNGMO's user avatar
5 votes
0 answers
1k views

K-fold validation on Google Earth Engine

I have a satellite image "india_image" and data in form of a feature-collection "ft". I want to perform k-fold validation on this data in Earth Engine. How to do so? var india_image = ee....
Mayan19's user avatar
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Classify image using segmentation analysis using QGIS and OrfeoToolbox

I am working on a project where we have made a RGB orthomosaic using a drone which I want to classify using QGIS. I am not a fan of unsupervised classification, and I started exploring the ...
Chris Driessen's user avatar
4 votes
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682 views

What does "Information [18]: Select at least one signature" in the semi automatic classification plugin mean?

I am using the semi automatic classification plug in to classify vegetation and water in a satellite image. I create training shp and signature list. When i hit "classification preview" it gives me ...
kwai's user avatar
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4 votes
1 answer
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Adding up several rasters to show the change

I want to add several images such that their change is shown in different colors. Such as the following in which I simply added two images in their grayscale. But I would like to have a colored ...
FJ_Abbasi's user avatar
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3 votes
2 answers
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Error occurring when converting to dB during the python-based classification

I am trying to perform an object-based classification using a python-based script with rsgislib. Although, when converting to dB, an error is appearing. Any ideas why is this happening? Create and ...
1milenac's user avatar
3 votes
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119 views

Reproducing Paper Results for Land Cover Mapping of Satellite Imagery?

I am interested in training a neural network to perform pixel-based classification for land cover mapping of satellite data. In order to learn more about this interesting field I am trying to ...
rrz0's user avatar
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475 views

QGIS: Cropland Data Layer - how to add class names to .tif file?

I'm working with a clip of the Cropland Data Layer (raster), which has a number for each value coded to a crop type. I want to add these crop type / class names to the .tif file (and have them show up ...
qwerk's user avatar
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3 votes
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QGIS - Semi-Automatic Classification Plugin v.4.9.5 - When trying to create ROI getting Error[43]: Attribute table error

when I try to create a ROI within the Plugin: Semi-Automatic Classification Plugin, I am getting the Error: Attribute table error. Which means it is not creating MC ID / MC Info or C ID / C Info in ...
obrob's user avatar
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How to use a conditional logic on Impervious Mapping

I am trying to use a logic ( rule -based classification ) to extract built-up area, similar to as suggested by Xu (2007).He uses, three spectral indices, SAVI( Soil Adjusted Vegetation Index), NDBI ( ...
Kaleab Woldemariam's user avatar
3 votes
0 answers
385 views

ASTER mineral indices with VINR and SWIR data

I need to run a supervised classification on ASTER data in order to map a rock formation, which is composed of chert. There is no shortage of indices which can be used to highlight silica rich ...
jc22's user avatar
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3 votes
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R: Can raster predict function pass to predict.rfsrc (a prediction function in a parallel verion of RandomForest)?

It seems that raster predict function can pass to predict.randomForest by setting the "type='response'". I am using a parallel version of randomForest package called the "randomForestSRC" and I am ...
nomoreraster's user avatar
2 votes
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42 views

Doing simple manual classification of LAS using QGIS

Are there any basic tools for lidar classification in QGIS? Id like to do simple function like reclassing single points, classing points inside a fence or above a line. something similar to the basic ...
LidarBeaver's user avatar
2 votes
0 answers
128 views

Resizing image for classification

I want to perform supervised classification in Python and in order to perform that I need to have a training sample raster and satellite image. My problem is the training sample raster file has a ...
surdeep's user avatar
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2 votes
0 answers
108 views

Classify georeferenced image based on colour in QGIS

I have a georeferenced image (attached) that I want to classify into a raster, where raster values correspond to the colours in the image. Low (green) = 1 Medium (yellow) = 2 High (red) = 3 All other ...
Stuey17's user avatar
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0 answers
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Layer error: Computation timed out

I want to run object-based svm classification with Sentinel 1 and Sentinel-2 images, and for that I first segmented the Sentinel-2 images which worked well. But then I wanted to make classification ...
Gulnihal's user avatar
2 votes
0 answers
433 views

Random forest for Landsat 8 in Google Earth Engine JavaScript API

I want to apply and examine random forest classification results on landsat 8 image collection in Google Earth Engine (as modified from the origin code in Earth Engine Tutorials) Accordingly I ...
Solmaz's user avatar
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2 votes
0 answers
473 views

ArcGIS - separate/split shapefiles by attribute range and save

Problem: I often have a shapefile that I classify into 3-5 classes based on the values of a specific field. Usually I am interested how many features are in each class and which area has each of the ...
GIS_USAr's user avatar
2 votes
2 answers
378 views

Maximum Likelihhod Classification - Error 010108 and Error 010067

I'm trying to run a supervised classification on a Landsat8 multi-band raster in ArcMap. Every time I run the classification, it returns Error 010108 and Error 010067. The 010108 error says The number ...
mfigura's user avatar
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2 votes
0 answers
220 views

How to improve LiDAR classification in GlobalMapper

I have a LiDAR point cloud that has a density of 16.4 points per m^2 and spacing of 0.2469m, and am trying to extract trees from it but the classification came with a lot of messy points in classes ...
forestGIS's user avatar
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2 votes
1 answer
883 views

Multi-temporal classification in Google Earth Engine - clustering and grouping based on time sero

I am working on my master thesis on multi temporal classification of LULC using S2 imagery in Google Earth Engine. The goal: to distinguish urban area from the landscape in the Inner Niger Delta. ...
Sanneeeliza's user avatar
2 votes
0 answers
197 views

Calculating proportion of pixel containing vegetation (from sentinel 2 image stack)

My task is to perform a supervised classification of landcover across a huge (20,000+ hectare) property. I need to classify into three classes: forest, regenerating trees, and soil. We use s Sentinel-...
Joe's user avatar
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2 votes
0 answers
127 views

Create categorized renderer from styles won't color categories

I'm trying to use the tool named 'Create categorized renderer from styles' When I classify my layer by an attribute table value in layer properties/symbology/categorized I get different colors ...
puredata's user avatar
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2 votes
0 answers
126 views

More precise control over QGIS symbology classification

In QGIS, I would like to classify my graduated symbology by standard déviations, as such: . However, I find that the behaviour seems erratic or hard to control, and I can't choose the number of ...
Lucien S.'s user avatar
  • 163
2 votes
0 answers
48 views

Calculating range of values for a class for landscape analysis

I am working on a large scale landscape analysis in Qgis: on several raster layers i made (using SRTM dem as source data) i am doing a reclassification procedure. Reclassification is based on a set of ...
Radioactivepanda's user avatar
2 votes
0 answers
29 views

Conditional Expanding in ArcGIS Desktop?

I would like to reclassify a LC map given some conditional rules (raster with 8 classes total). Using the illustration, I would like to expand the green pixels (two distinct classes) on the white ...
Benjamin Beaumont's user avatar
2 votes
0 answers
41 views

Can I symbolize based on the syntax in a description attribute colum?

I got a kmz-file from an organization and the attribute table has a colum 'description' with a synthax that holds import information (such as date built, water source, village etc.) instead of a ...
Soof's user avatar
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2 votes
0 answers
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Classifying image using image segmentation in google earth engine

I am trying to classify a Landsat 8 image in google earth engine. I have to classify them object based, since I am building on an earlier research where they have used object based classification. ...
Nathalie's user avatar
2 votes
0 answers
328 views

Orthophoto land use classification in QGIS

I am using a CIR orthophoto and tried to make a land use classification with the use of Semi-Automatic Classification Plugin in QGIS. I work in QGIS 3.2 but I get errors that my ROI are too small (...
Eva 's user avatar
  • 21
2 votes
0 answers
397 views

Classify / section line or group of points according to shape (with shapely objects)

Is there any python module/function that classifies/sections a shapely line according to the shape the line forms? If not, I could do it with the positions of the points that form the line. I would ...
Aurelie Navir's user avatar
2 votes
0 answers
91 views

Training Sample Automation

Background, in case it helps: My objective is to (eventually) fully automate the mass digitization of grain silos. To this end, I have set out to first find a way to automatically identify silos in a ...
instructorjack's user avatar
2 votes
0 answers
48 views

How to Make automatic classes with algorithm in qgis modeler?

I have 1 column of numeric data in one attribute table of a layer made of points. I want to regroup this data in classes (style) with the Qgis modeler and each class must have a specific lenght that ...
Marc Robin's user avatar
2 votes
0 answers
225 views

Supervised classification using endmember spectra (using ENVI 5.1)

We are trying to map land cover classes over a small watershed. We have selected training sites (during a field campaign in early 2017) and determined their spectral profiles on a Landsat 8 image ...
Roland Y.'s user avatar
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2 votes
0 answers
609 views

Importing classification bitmap made by another software into QGIS?

I am currently trying to import a classification bitmap made by our own deep learning software into QGIS. The classification is saved in a TIF file, the classes are 8-bit integers. We have the class ...
Jean Vézina's user avatar
2 votes
0 answers
249 views

Delineating coastline with panchromatic imagery

I have a panchromatic satellite image with a large coastline area and my goal is to delineate this coastline with a maximum accuracy and minimum amount of manual work. What is the best option to ...
Basile's user avatar
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2 votes
0 answers
481 views

reading .tif and .tif.aux.xml as a whole using geotools

I have sample.tif, sample.tif.aux.xml, sample.qml files in a directory. The .qml and .xml files contain classification data about .tif file. For example my .xml file is something like this: <...
Amir169's user avatar
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2 votes
0 answers
216 views

Erdas 2014 process time signature editor supervised classification

I am currently using erdas imagine 2014 with 64bit OS. Basic configurations of my computer are; i7 3820 3.60 GHz CPU, 16 GB memory (RAM), gforce GTX 680 SLI 256 bit Graphic card ( 2GPU ), 250 GB ssd. ...
user82974's user avatar
2 votes
0 answers
334 views

Supervised Classification Plugin QGIS: change input image; use another raster layer

I'm doing supervised classification on a sugar cane field for identifying vegetation, soil, and soil and litter. The plugin is only taking in the GeoTiff taken from the multispectral camera we used (...
Sergio Escalante's user avatar
2 votes
0 answers
560 views

Needed help to launch SVM classification in eCognition

I would like if somebody help me to launch SVM classification in eCognition. Have you met any tutorials? I was searching through ecognition community, but there I find only basic KNN supervised ...
Roman Perkhaliuk's user avatar
2 votes
0 answers
850 views

Remote sensing Classification and texture analysis compared with QGIS zonal statistics

I am Using Geomatica to analyse suburban spectral signature in Las Vegas. Ran a texture analysis on all band images. Combined texture bands with original image bands to run an unsupervised ISODATA ...
Chris Medyna's user avatar
2 votes
0 answers
41 views

Does fixed classes exist in QGIS?

I'd like to create several images of voronois polygons in QGIS; each images having differents values joined to the voronois. I tried to load a qml style with the values I want to keep (8 classes : 0>...
camille's user avatar
  • 21
2 votes
0 answers
899 views

ENVI: Postclassification, remove pixels of certain size

I did a classification over multiple Landsat imagery in ENVI 5.1, which turned out not too bad (ice and snow in Cyan in the picture below). Now I am about to do a postclassification to filter out ...
redshoe's user avatar
  • 427
2 votes
0 answers
550 views

How to batch classify a multi-temporal raster image stack?

I am using dense time stacks of remotely sensed imagery to analyse vegetation change in the Arctic from 1984-2010 for one scene. I will be needing to classify each image, likely using the Maximum ...
vputinski's user avatar
2 votes
0 answers
214 views

QGIS 2.2.0-Valmiera 64bit on windows 8.1 displays error while creating ROI in SAC plugin

I don't know what happened while creating ROI during Classification using Semi automatic Classification Plugin 3.1.0 "Rome" installed on hp Pavillion i7 with windows 8.1 When i started to generate ROI ...
Waseem Ali's user avatar
2 votes
0 answers
158 views

Flood extent extraction from satellite images

How can I extract the floodwater from satellite images? Is the image classification method accurate for moderate-resolution satellite (Terra/Aqua MODIS)? Or are there more accurate methods?
Jonh's user avatar
  • 21
2 votes
0 answers
929 views

ISODATA unsupervised classification in ArcMap 10.1

I’m doing a project on landsat 5 images. I’ve composited the images into 1 raster, and I want to classify the raster with ISODATA Unsupervised Classification. How do I calculate the best number of ...
Yael's user avatar
  • 21
1 vote
0 answers
33 views

Classify vector layer by area quantiles in QGIS

I have a vector layer with aroud 400 features, each having an assigned value (here displayed as a label). I want to classify it into 5 groups (10%/20%/40%/20%/10% of the total area) based on the ...
t3ahunt3r's user avatar
1 vote
0 answers
376 views

Semi-Automatic Classification Plugin Problem - No band encountered

I am new to the Semi-Automatic Classification Plugin. I am currently trying to produce Land Surface Temperature maps using satellite images (Landsat8) from Earth Explorer. I have downloaded the B10, ...
Izzy's user avatar
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