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.
192 questions
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Strategy for LULC ground truth sampling with prior information on LULC [closed]
I am designing the sampling strategy (i.e. choosing points) for a ground-truth data collection of land cover. The ground-truth will then be used to train/validate a custom map of forest cover (2 ...
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Unsupervised classifier, no data in training input
I am trying to do an unsupervised classification in GEE using Sentinel-2 drone imagery for training and classification and high-resolution drone data as a visual reference. When I define my training ...
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Supervised classification ALOS-PALSAR Google Earth Engine
I need to create a supervised classification for flood detection with ALOS PALSAR in Google Earth Engine. How can I do this?
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What is the optimal number of samples in a random forest classification?
I am conducting a supervised classification as part of a LULC analysis. I have 8 classes with sample sizes maxing at 500. However, I am still seeing some misclassification and want to add more classes,...
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Merging non-overlapping classified rasters with varying nb of classes
In ArcGIS Pro 3.2, I have several tiles of 1km² as composite rasters (4 bands+NDVI+NDVIre+DSM). I classify each tile independantly with SVM and segmentation, using a training scheme with 8 classes. ...
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Google Earth Engine Classification Collection Mode Frequency for pixel confidence/stability/agreement
I am trying to obtain the mode and the mode frequency per pixel of different iterations of a Random Forest Classifier (With a fixed number of trees but with different random seeds) with 5 classes (0 ...
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303
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Error in preview of classification in QGIS
While doing LULC classification I am facing the following problem in QGIS. I am unable to do the following process. After selecting all the training inputs, I select classification in band-processing ...
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359
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Use lookup table to create new raster layer based on values in multi-layer SpatRaster using R terra
I am doing an ecosystem classification project where I have 3 raster layers that each correspond to different ecological classes with different numbers of categories. I want to take the unique ...
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Data arrangement in CSV file [closed]
I am getting whole data in a row while exporting CSV file . I need data in separate columns in CSV file. Soil variable value in a separate column and pixel counts against each soil variable in next ...
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126
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Exporting classified land cover class as an asset for NDVI calculations
I have conducted a supervised classification in Google Earth Engine using Random Forest, to which I have provided the code.
https://code.earthengine.google.com/3b3d4583f26a4651f4fbe10aa80c5f30
Map....
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Random forest classification on QGIS gets stocked at 66% with an error message whose conditions have been met
I am running a random forest classification on QGIS using dzesaka pluggin, after picking my training sites and running the classification,
it gets to 66% and a prompt message appears that i ensure ...
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Exclude areas with building from a map
In ArcMap, I'm trying to create a site suitability map for a solar farm but I have issues with the building footprint file. I'd like to exclude areas with buildings but I have no idea how to go about ...
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Combine and reduce land cover and MODIS collections with different IDs
I need to add the information from Land cover Image Collection (2015-2019) to MODIS Image collection. In practice should be merged fuve land cover images with MODIS images for the whole five year long ...
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Change the order of my raster based classification
I am having troubles switching the order of my classifications of my raster, which originates from R language and imported into QGIS.
In the attached image I am trying to switch around my grass and ...
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How to use existing polygon feature class as training samples in ArcGIS Pro Classification Wizard?
I have created a polygon feature class from field observations at specific locations. I renamed the attribute table field containing the classes to "classname" as this seems to be important ...
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512
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GEE - random forest doesn't classify my whole image
I'm new to GEE and I'm trying to do a machine learning supervised classification using random forest. it turns out that I made a code taking different parts of other codes and it works well for small ...
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195
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How to mask a raster and apply an unsupervised classification? R
I am getting the error:
In matrix(values, nrow = ncell(x), ncol = nlayers(x)) :
data length [6691] is not a sub-multiple or multiple of the number of rows [25628]. In reaction to knr <- setValues(...
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How to use all pixels covered by training polygons for random forest classification in R
I have a training dataset containing around 350 polygons and their land cover classes which I use to train a random forest classifier to classify my raster image. I would like to use the values of all ...
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204
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How to classify land use change
I’m trying to classify land use change in Google Earth Engine. The classification is made by using pins to assign different reflectance indexes to different land use types. However, when I change the ...
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130
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Interpolating missing pixels from land cover classification map
On Google Earth Engine, I created a classified land cover map based on a composite of images (spanning 2 years). It's a time series study so increasing the range of images (i.e. increasing to more ...
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Is it possible to output a value (feature class) along specific increments along a given route?
I have a .shp file of a route (ie., the route of a cable) and a .shp file of the various sediment classifications covering the entire area of the route.
I was wondering if it was possible for QGIS to ...
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111
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Opening images layer stacked on ArcMap into ERDAS
I noticed that ArcMap can open almost anything but if I do a band combination or a supervised or unsupervised classification on ArcMap I cannot open it on ERDAS.
Is there a way around it?
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197
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Trying to Calculate Built-up Class area using ESA LULC
I am trying to calculate the Built Up class area but not getting the correct result. I am using ESA 10 Meter LULC.
'''
var area = ee.FeatureCollection("users/Muhammad_Waqas/District_Boundary"...
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Calculate percentage of points within land cover classes QGIS
I am working on a project for my university and this is my first solo project.
I have a land cover classification with 6 classes. I also have a set of points that are recorded sightings of a mammal we ...
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Is there a way to make land classifications with simple RGB satellite images?
The area of interest I am working on mapping is quite small, just under 10 acres. I need to create simple landcover vectors (trees, low vegetation/grass, water). I don't have access to high enough ...
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230
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L7 issue with land use classification in Earth Engine
I am trying to classify land use in earth engine with L7 imagery, however a chunk of the region of interest is being left out as seen in the image.
The code can be found here:
//Set map centre
Map....
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149
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Classifier training failed: 'Only one class.'
I am new to Google Earth Engine and am trying to classify landcover. I keep getting the error of "Classifier training failed: 'Only one class.'." However, I have multiple classes.
var ...
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75
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GloH20 Global Koppen Geiger Raster Values
I am trying to use the global KG classification raster from http://www.gloh2o.org/koppen/. Everything seems to be working fine, but the values from the raster seem to range from 0 - 30, however the ...
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219
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Selecting a specific land cover type based on colors in GEE
I want to select a specific land cover type in a land cover map obtained from the GEE dataset.
Because I know the corresponding hex colour code, I tried the colour code as a condition to filter the ...
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Created weighted sample points in ArcGIS Pro
I have a classified satellite image and I want to create a confusion matrix to check its accuracy. Instead of doing a "simple random sample", I want to do a weighted sample, where there is a ...
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129
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How to classify tree cover overlapping roofs in eCognition
This might be a fairly simple question, but I'm new to eCognition. I'm using Developer 10.2. For canopy that overlaps rooftops, I need to define these areas as separate objects and classify as canopy.
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No valid training data were found [closed]
I'd like to use randomforest to create a classification model, but when I want to classify landcover in 1986, it always says the error:
No valid training data were found.
Here's my code:
var dp2021 =...
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1
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290
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How to combine Legend Values of existing LULC in GEE?
I'm trying to refer my study area with this amazing LULC, I found on Earth Engine Apps, but it has about 255 legend values. I am not understanding how to proceed with this classification of my study ...
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650
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Creating CNN model for multi-class image classification using Google Earth Engine
I am trying to build a satellite image classifier CNN using Google Earth Engine.
I have been following this tutorial: https://colab.research.google.com/github/google/earthengine-api/blob/master/python/...
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Exporting a classified image in GEE without getting a BLACK raster image
I have been trying to export this classified image. I want my GeoTIFF file to show this view...
But every time I export, my image turns out Black. after some digging i got to learn that I need to ...
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1
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Layer error: No valid training data were found
I am creating soil land use classification through the use of ee.Classifier.smileCart().
I created the variable training, but I got an error:
Layer error: No valid training data were found.
// This ...
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landsat C2L2 random forest classification
I want to apply random forest classification on landsat C2L2 data.
I found code for Landsat Top of Atmosphere (TOA) collection but i think its better to use C2L2 colection (i will be so glad if any ...
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Eliminate isolated pixels in Google Earth Engine classified image
Is there a way to eliminate isolated pixels just like we can do with the classification sieve of the QGIS SCP plugin?
I've done a classification of an image that contains many isolated pixels which I ...
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1k
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Showing the land cover class area in the Google Earth Engine chart
I've produced a classified map in GEE and trying to create a chart showing the area for each landcover class. The code I'm using is as follows,
var classNames = ['vegetation Covers', 'Water Bodies', '...
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131
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Resolving land use/land cover misclassification
I'm relatively new to RS, I've been using Landsat Collection 2 Tier 2 data for my land use maps in ArcGIS Desktop. The problem is that my AOT has scarce rural built up area, due to which other barren ...
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Calculating raster land use zone characteristics for multiple circular buffers derived from lat long coordinates in QGIS 3.12.3
Calculating raster land use zone characteristics for multiple circular buffers derived from lat long coordinates in QGIS 3.12.3
I am running QGIS 3.12.3. I have 150 circular buffers at 1KM, 4KM, ...
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Raster comes in black square outside my shape layer while performing unsupervised classification in QGIS
Any idea why my raster comes in black square outside my shape layer while performing unsupervised classification in QGIS? How can I correct this?
Tried correcting it by adding 100% transparency for ...
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LULC Classification of Sentinel-2 Using XGBoost in R
I am trying to do Land cover classification using xgboost in R language.
These are the following steps:
> library(raster)
Loading required package: sp
Warning message:
R graphics engine version 14 ...
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Reclassify values of the land use land cover class of Copernicus Global Land Cover Layers in Google Earth Engine
I am using the Copernicus Global land cover layers:CGLS-LC100 collection 3 data set.
I want to reclassify the value of the lulc for my application.
Map is showing but when I want to reclassify the ...
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1k
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Object-Oriented LULC Classification in Google Earth Engine
I am testing a object-oriented LULC classification approach in Google Earth Engine, using the code available at the following link: https://code.earthengine.google.com/4032fe102252b285ec249f395d0d6d0f....
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64
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Alternative way of correctly classifying Landsat images
I am conducting a supervised classification of Landsat 8 image. I have 6 classes: river, forest, built-up, brush land, grassland, and agricultural land. I assessed the spectral separability of each ...
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1
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269
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While clipping a Raster generated from SCP plugin (classification) all the colors are vanished in the end output and the raster generated is in B/W
I have done all the LULC classification using SCP plugin. after completing my classification, I wanted to clip the raster using a Shape File. But when I do it, the colors are vanished in the output ...
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1
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I have a satellite image. I want to sample all the trees and vectorize them at once
I have a satellite imagery. I want to vectorize all the trees at once by color sampling. How to do it?
I used Photoshop to sample the all the various color ranges of trees [Green] to distinguish ...
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1
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1k
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Validate a supervised classification in Google Earth Engine using ground truth data
I ran a supervised classification in Google Earth Engine (GEE) using the following script.
// add an image, bounds, filter data and sort by cloud cover
var limitiNapoli = 'PathToMyasset'
var image =...
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121
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Adding values to landuse class raster using ArcMap
I am currently working on a map that holds my animals' projected radio-locations from my work this summer.
I have a current land class map downloaded from the USGS of the site; however, some of the ...
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