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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9 views

Maximum Likelihood Classification gives Error 010108 in ArcMap

I'm trying to run a supervised Maximum Likelihood Classification operation on a Landsat 8 image in ArcMap. It keeps returning: Error 010108: The number of bands in the signature file is less than ...
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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 ...
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21 views

Running Supervised Classification using ArcMap

I am trying to run a supervised classification of a landsat 8 satellite image. I have made a signature file with 6 classifications, but every time I run it it returns only 3 values in the new raster. ...
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GEE fails to classify different classes in Supervised Classification

I am doing supervised classification for flood mapping. The problem is when I try to classify into different groups, the code can't seem to differentiate between vegetation and Water (personally, I ...
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19 views

Setting LAS Class Codes in ArcGIS Pro too slow

I have seen similar questions, but they don't quite relate to my particular issue. I classified habitat in a high-resolution drone orthomosaic image of a 300-m long stretch of beach, then used Raster ...
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eCognition Classifying only first class

I was playing around with eCognition over the weekend and was having the issue that when I performed a classification it would classify the entire region as the first class within the class hierarchy ...
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46 views

Using LiDAR to identify coniferous and deciduous trees

Is it possible to use only LiDAR data to distinguish between mostly coniferous and deciduous forest? I have a LiDAR data from spring and summer, but they have different point spacing.
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1answer
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Apply a mask (shapefile) over a satellite image in Google Earth Engine

I have a Sentinel 2 satellite image and am rating it. I already classified all the native vegetation separated into a shapefile. Now I need to classify the anthropic uses, I would like the GEE to ...
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181 views

Performing supervised classification on Sentinel images

I'm looking for python code which predicts the LULC of my data(other raster files apart from refernce data band1, band2 and soon) using svm classifier with rbf kernel based on reference data (truth ...
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1answer
22 views

Combine slope info with Landsat for classification in Google Earth Engine

I wanted to add slope data as a band to filtered Landsat data. I used ee.Image.cat to "merge" two images. I can see added band in a merged image, but when I perform the classification (which ...
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Distinguish between agricultural lands and other land types in the Google Earth Engine

I have classified an image into 5 different categories of soil land, build-up, jungle, water, and the lands that are green but are not jungle. Now, I want to write a code to separate and distinguish ...
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40 views

Overstory-understory classification from discrete return aerial LiDAR

I have an opportunity to collaborate with bat biologists who are interested in predicting probability of roost occurence in seasonally flooded ponderosa woodland. We suspect that both properties of ...
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Changing nearest neighbor parameter in Dzetsaka plug-in

I am using the Dzetsaka classification tool plug-in in QGIS 3.10.6. I am testing out different methods such as Random Forest and KNN. I was wondering if there is a way to change the nearest neighbor ...
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1answer
57 views

How to replicate ArcGIS geometric intervals in QGIS

Is it possible to replicate ArcGIS's Geometric Intervals in QGIS 3 layers symbology? I am using QGIS 3.10.9 LTS and would like to assign a geometric interval style to a simple shapefile of UK counties ...
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27 views

False positive results while mapping water bodies

I am a veterinary epidemiology researcher interested to benefit livestock in a desert. As water is an important resource for herders therefore I have become interested to map water bodies.I learned ...
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Create an outline based on density of raster

I have a classified aerial image of small vegetation that is separated enough by ground that it is not overlapping each other. After the classification process (dzetsaka), I removed all the other ...
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1answer
92 views

Install Orfeo Plugin in QGIS - Plugin is not already in QGIS core

I am brand new to QGIS (coming from ArcGIS), and am needing to install the Orfeo toolbox to do some image classification. I found a nice tutorial here with an overview on how to install it: https://...
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OpenStreetMap uMap show classified features

For the first time ,I am using the OpenStreetMap uMap to share my data online (http://umap.openstreetmap.fr/) I am trying to show classified features (different colors in the same layer) but I can't ...
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27 views

Input image does not match with signature file in supervised classification

I have a issue in supervised classification on ERDAS IMAGINE. When ever I performed supervised classification it gives a warning message. It says: iInput image does not match signature's image ...
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2answers
100 views

Combining imagery, masking and sampling in Descartes Labs Platform

I am trying to sample data from Descartes Lab imagery to train a random forest classifier in the Descartes Plaform for an agricultural region. I have already written a script to prepare the imagery of ...
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46 views

Sentinel 2A Classification in Google Earth Engine

I tried to get classify image for my region of interest using Sentinel 2 ,, I got the result, but I am getting error. var roi = ee.Geometry.Rectangle([82.5,18,83,18.5]); //this comment for filtering ...
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1answer
29 views

Same confusion matrix depiste hyperparameter tuning using TrainImageClassifier in OTB

I am trying to run a land use land cover classification using TrainImageClassifier in OTB. Here are the settings I used : The problem is that no matter how much I tweak the hyperparameters of any of ...
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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 ...
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Classified image using RF method in R displays less no. of classes than it was trained to

I am trying to classify crops using Sentinel-2 image including 10 classes, using randomForest classification in R. For that, I extracted 2000 random samples points from the training areas for 11 bands ...
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1answer
108 views

SMILE classifiers/regressors in Earth Engine

I am working on a project intended for publication that leans heavily on Earth Engine for much of the workflow: assembling, compositing, and mosaicking lots of images from multiple data sources, ...
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1answer
58 views

Remapping classified image using Descartes Labs

I am hoping to remap the values of a multi-value classified image to create a binary classification. In Google Earth Engine, there is a function remap() that takes the original values of pixels and ...
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In ArcGIS Pro, how can I transfer the color scheme to other maps so that the same color is maintained for each class?

In ArcGIS Pro, how can I transfer the color scheme to other maps so that the same color is maintained for each class? For example 2,1-4,0 degrees Celsius "deep blue". Class 4,1-6,0 "...
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18 views

Pixel-based image classification (Orthoimage or Raw image?

I am studying image classification and wanted to produce some land cover maps. However, i can not seem to find resources that states whether you need to geometrically correct (orthorectification) your ...
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1answer
24 views

ArcGIS quantile classification method results in unequal data values in each class

I have a raster dataset which I visualized in ArcMap 10.6.1. I used the quantile data classification method to assign colours to the data values. ESRI's documentation says the following about ...
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1answer
82 views

Errors when uploading image to Earth Engine directly from the Cloud Storage bucket

I wanted to upload the image to Earth Engine directly from the Cloud Storage bucket with the earthengine command but encountering some errors !earthengine upload image --asset_id={OUTPUT_ASSET_ID} --...
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42 views

Generate classification schema in ArcGIS Pro using labeled raster - fail

Trying to do supervised classification of L1TP Landsat 8 OLI bands using USDA Crop Data Layer .tif file through ArcGIS Pro. The Crop Data Layer file has one band, with labels like "Corn", &...
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7 views

Categorise vector layer based multiple attribute variables

I would like to make a classification of a dataset (WFS point layer) on the values of two different variables. I would like to select from the first column only a specific type of flower (Rose). Then, ...
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fusion of different resolution satellite image?

I have two dataset Worldview (38cm: pansharpened) - R,G,B Planetscope (3m) - R,G,B,NIR But, worldview image has only R,G,B, so I can't figure out spectral response for classification. I think it's ...
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Extract band values to points from mosaic (ArcGIS) in R

I am classifying satellite images in ArcGIS. I would like to partially evaluate my results in R, e.g. through Crossvalidation. I want with mosaic (raster with 6 bands) extract band values to points ...
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1answer
38 views

Performing land cover classification over whole country

I am doing land cover classification over the whole country of Djibouti. I am downloading Sentinel 2 images for this purpose. I have realised doing land cover classification over a large area needs ...
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27 views

QGIS SCP doesn't stack all bands for Sentinel 2

I've been following various tutorials to try and stack and then eventually classify images from Sentinel 2, but after downloading the images and running the band set tool, it simply only stacks 4 ...
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1answer
156 views

Results of Variable Importance of RF Classifier in GEE

I create a RF modulu in GEE like this; //Random Forest Result Function Module exports.getRfResults = function(image, title, bands, trainPoint, testPoint, area, label) { //Create Sample Points ...
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1answer
22 views

Fire Danger Forecast index- classification - USGS

I recently downloaded a raster image called Fire Danger Forecast index from USGS - Fire Danger Forecast, and I wanted to get the probability of fire for a set of points I have in another layer, but ...
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Unsupervised pixel classification in ArcGIS Pro 2.4.0: ISO cluster will not let me classify image into three classes

I am using ArcGIS Pro 2.4.0, and am attempting to classify a field into a schema with three categories: Leaves, Shadows, and Soil. Here is a sample of the original RGB image: Through supervised ...
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20 views

Google Earth Engine: Collecting Region Samples through image collection and merge them

I am using S1 Imagecollection to start a temporal supervised classification. Firstly, I added polarimetric indexes and other data as bands in each image. Then, I filtered the image collection and got ...
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62 views

Issue when running a land cover classification based on OBIA

I am carrying out a hybrid classification based on OBIA, following the magnificent code that Noel Gorelick and company developed: https://code.earthengine.google.com/?scriptPath=users%2Fnclinton%...
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36 views

Calculating number of plants on orthophoto

I have orthophoto map of agricultural field and I need to count plants there. I have also multispectral map (NDVI) but I think it's not very usable here. I know the best would be to have point layer ...
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1answer
134 views

Probability of variable importance calculation error in Google Earth Engine

I am trying to calculate the probability of variable importance each bands for classification. Basically, I have 3 class but when I try to implement the probability of variable importance, the error ...
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1answer
92 views

Pre-trained transfer learning models for satellite image classification

I am currently working on a project that tackles crop type classification using machine learning and deep learning. Given the limited amount of satellite data that I have, transfer learning sounds ...
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16 views

Extract house and road using image Google Earth

where I live does not have gis data, only images from google earth, so I want to take advantage of this image to build gis data,it is local's road, river and house. I am a beginner with this job. I ...
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116 views

No Data was found error after applying a MaxEnt classifier (GEE)

I am trying to redo this tutorial: https://developers.google.com/earth-engine/classification, using the MaxEnt classifier with my data. Code: https://code.earthengine.google.com/...
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1answer
96 views

Mask out pixels smaller than 1ha in Google Earth Engine

I am new here so please forgive any mistakes in this post: I have a simple script to classify cultivated area vs none cultivated areas using Sentinel-2 in GEE. I want to mask out all objects that are ...
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26 views

When to choose between a raster or vector format?

I'm trying to decide how to best serve data layers on a map. The data will be preprocessed on the server. The workflow I'm currently trying to implement goes as follows: Acquire satellite imagery (eg....
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1answer
64 views

Calculating areas of different raster classes in R with Superclass

I have a classified image with three categories (specific grass species: 1, ground: 2, other vegetation: 3). I am trying to calculate the area of each category. For the classification process I used ...
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1answer
27 views

Calculating LULC change 1973-2014 of a classified map (raster converted to shapefile) in ArcGIS 10.6

I am attempting to workout landcover change between two classified landcover maps. Ideally I want to show percentage change between the years per landcover type. I think I have done this but I am ...

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