Questions tagged [land-classification]

A cartographic delineation of distinct land areas, identified by their geology, topography, soils, vegetation, climate conditions, living species, habitats, water resources, as well as anthropic factors.

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30 views

AttributeError: 'NoneType' object has no attribute 'GetFeatureCount'

I am trying to use the Landscape Vector Overlay function in the LecoS plugin to calculate the amount of various proportions of land cover types (using an ordinary landscape raster) within buffer ...
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0answers
27 views

Integrate Land Use Data into Google Earth Engine

I want to Extract Land Use Data For Mumbai City,India and use the classification method to Compute NDBI,NDVI,NDWI Is there any way to integrate land use data into google earth engine for my ...
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1answer
22 views

How to apply trained classifier to entire Landsat collection in Google Earth Engine

I have classified the 2019 image using Google Earth Engine. How can I use the training data and code I have for 2019 and apply it from 1984 to 2018 instead of training/running a code for each image ...
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1answer
2k views

Accuracy assessment using Google Earth Engine?

I'm using Google Earth Engine for Land Cover change detection, I would like to know whether we can generate Error Matrix (Accuracy Assessment) for a classified image in Earth Engine or not?
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13 views

How to use a shapefile to Object based classification on eCognition?

Let me ask you a question about object-based classification with eCognitoin's Developer license. With the esstentials license, after the segmentation, a shape file to be used as teacher data was read ...
3
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1answer
64 views

Splitting up a region into training data and validation data for Landsat7 classification

I am building a classifier for Landsat7 by using MODIS land cover classification. My goal is to split up my region of interest into 80% being training data and 20% being validation data (with a ...
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2answers
29 views

Densify and smooth out categorical raster with diagonal neighbors

I'm classifying vegetation types in QGIS (3.10). I have a pretty coarse raster that I want to smooth out. The standard approach seems to be to polygonize and then apply various smoothing algorithms (e....
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3answers
2k views

Simplifying land cover classification in QGIS?

I have recently completed a land use classification using over 100 ROIs for 5 different land cover classes and it has developed what looks like a highly specific spectral signature for each class. ...
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0answers
26 views

Get polygons of crop classification from the Land Parcel Information Systems (LPIS)

I'm trying to get\download polygons of fields with crop type. There is a USA database called cropscape which is very friendly. There is also a European one called Land Parcel Information\...
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2answers
320 views

Replace specific raster class by surrounding classes

I have a classified landcover raster which also contains the classes "clouds" (pixelvalue 5) and "shadows" (pixelvalue 10). I want to eliminate them by replacing these two classes by the majority of ...
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0answers
35 views

Measuring area of raster within polygons using QGIS

I am trying to use QGIS3.10 to analyze the area of forest within regions. It looks like this where the polygons belongs to WFS layer and Rasters belongs to WMS layer. The legends fo Raster suggests ...
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1answer
39 views

Classifying land use in polygons using aerial imagery

I am trying to use the shapefile here: https://environment.data.gov.uk/DefraDataDownload/?mapService=EA/HistoricLandfill&Mode=spatial to work out how much of the sites are covered in trees. I ...
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19 views

Creating boundaries for Land-use classification

I have done the land use classification for sentinel imagery. Now I want to create boundaries, within that classified image, enclosing different classified section. For example boundaries for water, ...
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1answer
48 views

Working/Functioning of “sampleRegions” function in Google Earth Engine

I am doing land use classification in Google Earth Engine. I am using three different classes(forest, building, water) for classification. For each class, there is a shapefile containing polygon ...
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1answer
936 views

Seeking software programs to run supervised classification on image segmented into objects? [closed]

I am trying to run a supervised MLC classification on a multispectral remotely sensed image, however, I want the image to be classified using a shapefile of segmented image objects (as opposed to the ...
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1answer
104 views

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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1answer
44 views

Classifying type of crop on satellite images using Python [closed]

I'm trying to make a classification on the send with python, but logically I find all the vegetation that I don't care about. The even more serious fact is that if the species is not present in a ...
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4answers
15k views

How to perform Random Forest land cover classification?

This is a follow-up to a previous post: Machine Learning Algorithms for Land Cover Classification. It seems that the Random Forest (RF) classification method is gaining much momentum in the remote ...
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22 views

Export classifier from SCP Plugin for use in other image classification

I have run a classification using the SCP plugin in QGIS. I want to recreate these results in a neighboring area and I am looking for help to see if it is possible to save the classification ...
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1answer
684 views

Classification of buildings using USGS Landsat 8 images on Google Earth Engine

I am trying to classify built-up and non-built-up areas in the district of Ambala in India within the time period 2014-17 using a simple classifier model I had created. The model uses 20,000 points ...
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1answer
129 views

How to visualize data for a specific class in change detection plot in R?

I have created a change detection plot shown in image below for two rasters having 6 classes each using the code below. Now the plot, shows the change for all the classes but i am interested in only ...
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2answers
195 views

Converting output of crosstab() in R to raster; from classified raster images to show overall land cover change in different classes?

I have two classified landsat images from 2014 and 2018 both of them containing 6 classes including urban,forest,barren etc. In order to see how each pixel's class changed or remained same from ...
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0answers
853 views

Decision tree classifying of satellite image in R?

I want to classify satellite image in R using RWeka classifier, J48. I have a CSV file with the classes required, and raster data loaded in R. I am able to make the tree, however, I am not able to use ...
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2answers
60 views

How to define new classes from a change detection raster layer [closed]

As part of my thesis, I'm looking at the atmospheric and landscape effects of the 2018 wildfire in the Algarve. As part of the process, I want to estimate total biomass loss so I have classified two ...
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1answer
48 views

Do I need to perform any corrections on Level-2 Landsat imagery?

My objective is to perform a land cover classification with multiple scenes over historical imagery (one year every decade). Most of the imagery I have downloaded is level-2 imagery. From my ...
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1answer
91 views

Calculate area of overlap within polygons

ArcGIS Pro 10.6 I have a polygon layer with a column of 5 unique values, class names. I have a second polygon layer with a column of unique values, Parcel number. Each parcel will have multiple ...
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0answers
67 views

Performing supervised classification with Landsat 7 in Google Earth Engine

I am trying to perform landcover classification of Shanghai using JavaScript in Google Earth Engine. I am a complete beginner at this and I have been going through many tutorials trying to figure ...
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0answers
74 views

Conducting Land Cover Signature Classification on Google Earth Engine?

I was wondering if there is a way to conduct Land Cover Signature Classification, as specified on page 122 of the following user manual: https://buildmedia.readthedocs.org/media/pdf/...
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2answers
187 views

Classification model using NDVI time series?

I am trying to form a classification model with the help of NDVI time series data. I want to use methods like SVM and Random Forest. I know how to apply these methods to normal data. But, I am ...
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0answers
26 views

Correct translation of Norwegian landcover classes derived from WMS?

I am making a map of the study site located in Norway. I have accessed the awesome and free WMS data regarding landcover (I guess: N250 Arealdekkeflate) https://openwms.statkart.no/skwms1/wms.topo4....
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0answers
17 views

Quantifying level of urbanization of catchment over time?

I am studying the impact of urbanization on the discharge levels of a river during flooding events. For this, I need to determine the catchment's percent urbanized area through land classification ...
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1answer
113 views

Array in python just full of zeros when opened using GDAL

I'm working on the below script. What I'm trying to do is create a stats.txt file output which has the Land Cover Class ID, Fractional Coverage (of that class) and the number of pixels (of that class) ...
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1answer
602 views

Classifying raster that takes neighbours into account?

I am working on classifying forest types using Sentinel-2 satellite imagery (10-m resolution; band-2, band-3, band-4 & band-8). I have ground-truthed field data as a training set. I want to set a ...
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1answer
2k views

Does the “Quick-TRANSfer stage steps exceeded maximum” warning message affect my unsupervised classification results?

A similar version of this question has already been asked here, but there was no satisfying answer yet. I get the following warning for some of my satellite images: Quick-TRANSfer stage steps ...
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0answers
146 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 ...
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1answer
424 views

How to crop TIFF image without losing classes in QGIS 3.2?

I am trying to crop a TIFF file in QGIS 3.2. What I am currently doing is going to Raster -> Extraction -> Clip Raster by Extent... . Then I type in my min and max x,y values. The new raster layer is ...
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7answers
9k views

Failed to create signature file

I've no clue how to solve this issue in the exercise that I'm trying to perform. The point where I'm stuck is 4. "Create signature file as LandsatCompS.sgs". I've done what it says in the exercise. I ...
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2answers
328 views

Ice type differentiation using satellite data

I would like to classify glacial area by categories of snow (if there is) and ice, but what's most important: between old ice and fresh ice. They have different properties that are possible to ...
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1answer
52 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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7answers
8k views

Machine Learning Algorithms for Land Cover Classification

I am interested in learning what software exists for land classification using machine learning algorithms (e.g. k-NN, Random Forest, decision trees, etc.) I am aware of the randomForest package in R ...
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1answer
87 views

Simple land classification (urban, suburban, rural) using polygons in MapInfo?

I have a large number of polygons which I need to classify as either rural, suburban or urban. These polygons represent wireless coverage for a cellular network. What I would like to achieve is a ...
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0answers
36 views

NoData values in classification accuracy assessment

I want to assess the accuracy of a settlement classification I made (classification map) by comparing it to another product's settlement classification (reference map). Both maps have two "normal" ...
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0answers
1k views

Supervised classification Google Earth Engine

In the next code there are: Creation of variables such as: Slope, DEM, NDVI magnitude, NDVI average, etc. All those variables merged with two LANDSAT scenes Unsupervised classification with all the ...
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1answer
234 views

Quality of median image

I am trying to do supervised land use classification in a certain region. As this region is naturally prone to clouds, I have filtered the image collection on images with less than 10% cloud cover and ...
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2answers
1k views

SCP V.4.9.6 - after creating ROI, Warning: The following signature will be excluded if using Maximum Likelihood

I am creating ROI in Clouds using "create a ROI" (polygon) and this warning often shows after i save the ROI. Since the warning says that it will affect the Maximum Likelihood, that is why i delete ...
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1answer
71 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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0answers
85 views

How to classify land cover with MMU 25hac

By using the 30 meter resolution of landsat TM & ETM+ data, I want to create the land use/ land cover map. I have read in several studies to first decide about the minimum mapping unit (MMU) that ...
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3answers
3k views

Pixel-based and object-based classification!

I would like to understand if pixel-based classification algorithm (e.g. Maximum Likelihood classification ) can be used for object-based classification (i.e. after a segmentation procedure). On the ...
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1answer
369 views

SAGA 2.2.5 Problem Object Based Image Segmentation

Every time I use the Object Based Image Segmentation with Landsat 8 data I get a segmentated image which looks like a spider's web. The image contains no 0 values. Anyone has a idea how to fix this?
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1answer
2k views

Accuracy assessment in R - Calculation of User Accuracy

I want to assess the accuracy of the land cover classes classified by supervised classification of Landsat images. As reference data I use the aerial photography. I sampled the classified Landsat ...