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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Classifying coordinates on land/on water using QGIS?

I am a new user of QGIS. I'm looking for a solution for my problem. I have my own dataset providing the latitude and longitude of different unique ID's. Now, I would like to classify those ID's that ...
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24 views

Selecting Certain Slope Class That Is Not Surrounded Narrowly By Other Class

not sure how to brake it down, but let me try i've created a slope classification with this class now what i'm looking for is how can i select the class of 0%-8% that is not surrounded narrowly by ...
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62 views

Extracting Results of KMeans using Google Earth Engine?

How can I extract the Values for the Cluster-Means in Google Earth Engine? // Define each water-body as a own region var region = water // training region is the full image var training = ms1_new....
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Checking completion situation in GEE Code Editor?

I am trying to export a classified image and an accuracy table from GEE Code Editor to my PC. I think I know the procedure and implemented many times before. Can I see the downloading percentage of ...
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24 views

Input of KMeans when using multiple Band-Image in Google Earth Engine?

I am using Earth Engines ee.Clusterer.wekaKMean() for Clustering my Data. My input is a mosaic of different S1 images containing VV and VH bands. Is it possible to declare which bands are taken ...
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Assigning colors to specific table once, which will be used in different classifications of Google Earth Engine?

I am working on Crop Classification Assignment, in which I do classification twice in a year on the basis of major crops time periods. What I want to do is to assign Color to Unique ID of crops once ...
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28 views

GPS file categorizer

Do you know a software tool that can categorize/group GPS track files based on the location of its points? I need a tool (standalone executable, script or QGIS extension) which I can feed a list of ...
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Is there a way to reuse the samples chosen for NN classification for an another image?

I recently carried out the classification of a UAV multi-band orthoimage using NN method in eCognition. I have another orthoimage from the same mission for a neighbouring area. I would like to apply ...
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Count pixels per class instance of a raster classification

I have a fairly easy problem but I can not find any algorithm for it. I have this kmeans classification of a windspeed pattern from a model output: What I want now is to count the pixels in each ...
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96 views

How to Classify With Multiple Ancillary Datasets using QGIS?

I've tried using the classifiers in ArcMap which only supports one ancillary dataset and I tried using Orfeo in QGIS 2.18, though the Orfeo Image Classification tool does not accept any ancillary ...
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146 views

ENVI 5.1 - ANN Classification - Background was classified into one of the class

I'm new to Remote Sensing and I'm having trouble in ENVI 5.1 where the background was classified as one of the classes in the ROI I used, which is not right. How can I exclude the background or at ...
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PyQGIS 3.4: otb:unsupervisedkmeansimageclassification -> AttributeError: module 'processing' has no attribute 'runalg'

I'm trying to classify a raster with PyQGIS: import processing processing.runalg("otb:unsupervisedkmeansimageclassification","FalseColor.tif",128,None,100,3,1000,0.95,"class.tif",None) The python ...
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221 views

Is the Random Trees Classifier in ArcMap 10.5 equal to Random Forest?

Is the Random Trees Classifier in ArcMap 10.5 the same as what is named Random Forest in other applications/software? I see that the parameters are the same and the design seems the same, but I need a ...
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130 views

Performing Object Based Image Analysis with NAIP?

I use NAIP imagery (primarily in QGIS/GRASS) for agricultural analysis. I want to separate out objects such as grain silos, farms, buildings, &c. using segmentation and classification. Is this ...
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71 views

How to assess significant land cover changes using Chi-square test?

I have a series of land use maps at different times as a result of a classification process on Landsat images. I am mapping 3 different thematic classes : bare soils, vegetation and croplands. I ...
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Extracting specific roads from raster image using ArcGIS Desktop?

I want to create a line shapefiles of white roads from the raster file (screenshot1) using ArcGIS:. My idea is to use ArcScan toolbar, but first of all I need to classify roads pixels values from ...
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135 views

Maximum Likelihood Classification says there are 0 classes when there should be 5

I'm trying to do an image classification. I created a polygon with 5 different classes (identified in the Id column; 1-5). I then created a signature file (which took about an hour to complete). When ...
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414 views

Copy class in higher level in eCognition

I use eCognition to do classification. I do segmentation and I class it in level-1. Then I do segmentation in level-2. How to copy class from level-1 and paste the class in level-2 ? There is 'Copy ...
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48 views

Data type doesn't match error in Sieve filter

I classified some land cover types in aerial image with Erdas Imagine, now I want to remove classification errors showing very small areas. I tried to use Sieve filter, but getting error notification "...
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225 views

How to export training area information?

I did a supervised classification of a whole Landsat 8 image with 700 Rois (training areas) with the Semi Automatic Classification Plugin. I want to export the class names, the coordinates and the ...
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451 views

OBIA following connected components segmentation in Monteverdi2

New to Monteverdi2 and OTB. I just finished a connected components segmentation using the Segmentation module and the large-scale vector output mode for large datasets. How can I filter the output (...
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Get data monthly from Landsat 8 image-collection

I am doing classification with Landsat 8 and other information to predict farm land use. I want to use monthly data(Monthly composite) rather than data from 2015-01-01' to '2016-12-22'. I think I ...
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28 views

Generate LULC maps using Sentinel data of European Space Agency?

I found out that Sentinel data is of 10m x 10m resolution whereas LANDSAT data is of 30m x 30m resolution. Did anyone come across research in which Sentinel data is used for making LULC maps or is ...
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110 views

supervised classification in grass gis

I am currently using GRASS GIS 7.4.1. I need some help here: when loading a geotiff made in QGIS to GRASS GIS, the bands that make the image are split (e.g.clip1@permanent, clip2@permanent, & so ...