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.

Filter by
Sorted by
Tagged with
-1 votes
0 answers
20 views

Monitoring lake water level with NDWI and pixel count

I am working on a GEE script to monitor the water level of a lake in Switzerland. I have one script for Landsat 5 bands (before 2015) and one script for Sentinel-2 bands. I'm trying to classify the ...
Angélique Falatakis's user avatar
0 votes
0 answers
16 views

Random forest invalid data

I'm trying to classify forest habitats at a 10-meter resolution. I have imported my points from a shapefile that contains habitat categories for each sampled point in the "target" column. I ...
Ecostudent's user avatar
0 votes
0 answers
12 views

Multitemporal supervised classification with spectral signatures in GEE

I need to run a supervised classification on GEE using Landsat image about a determined date with the spectral signatures derived from a image of another year but same month. Is it possible?
Leo Lizárraga's user avatar
0 votes
1 answer
31 views

Symbology Class Editing Options Greyed Out

I am trying to add a symbology class to a layer but the options are greyed out. I believe it has something to do with the warning that says "primary symbology relies on one or more fields that ...
Bear's user avatar
  • 23
1 vote
1 answer
37 views

Error - Missing property in a classified image

I am trying to classify a Sentinel 2 image composite with some added index bands using Random Forest supervised classification on a collection of sample points generated from a source Dynamic World V1 ...
Kirill Ivanovskiy's user avatar
0 votes
0 answers
44 views

QGIS and percent values in slope map

I create a slope map from a DEM downloaded with SRTM Downloader in QGIS 3.32.0-Lima. I searched in the internet trying to find the way to interpret the values of the left column in percent. For ...
Joseph's user avatar
  • 9
0 votes
0 answers
28 views

Interactive supervised classification tool greyed out

I'm using ArcMap to perform a classification. The problem is in the classification wizard, all tools like maximum likelihood classification and other are still available except the interactive ...
amina k's user avatar
0 votes
0 answers
47 views

Zonal Statistics in QGIS

I am using raster layer zonal statistics in QGIS. I want to quantify the water yield contribution of each LULC class, but the results of the zonal statistics is greater than the value given by the ...
ccquinon's user avatar
0 votes
0 answers
43 views

QGIS SCP Error When Classifying Landsat 5

Good day! I am trying to classify a landsat 5 collection 2 level 2 image of my study area, but when I start the classification process after selecting the ROIs an error occurs. UnboundLocalError: ...
ccquinon's user avatar
1 vote
0 answers
271 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
  • 11
0 votes
0 answers
25 views

Band not recognised - seagrass mapping on GEE

// Load Sentinel 2 raw imagery and filter it to all images in 2023. var S2data = ee.ImageCollection('COPERNICUS/S2_SR') .filterDate('2023-05-01', '2023-08-01') .filterBounds(poi) .filter(...
Defne's user avatar
  • 1
0 votes
1 answer
42 views

Using existing GeoTIFF as training points for random forest classifier (Landsat 7)

I am new to R and GEE. I am trying to establish a link, using time series analysis, between land use change (different classes) and evapotranspiration (if possible also temperature, precipitation and ...
MONICA MANUELA CORREIA's user avatar
1 vote
1 answer
101 views

Reclassify points in a LAS file using laspy

I am trying to change the classification of all points in my las file above a certain height (z value) from 2 (ground) to 1 (unclassified). I wrote the following code to do this: las = laspy.read(&...
Tahrir Siddiqui's user avatar
1 vote
0 answers
32 views

QGIS Classifications on 10km^2 square grid

I am new to QGIS, and I have a problem that I don't know how to solve: My goal is to have a 10km x 10km square grid of Europe where each cell of the grid is classified by land use. With just a few ...
Philip Schmid's user avatar
1 vote
1 answer
113 views

Layers not getting displayed using Map.addLayer in GEE

I am writing a code to classify glacier features using various masks. The problem however is that none of the processed images are getting displayed. They are getting processed and the 'print' ...
Ayushi Sharma's user avatar
1 vote
1 answer
45 views

Select legend items in ArcMap

I have classified class interval with pixel value (i.e. >1 & < 0 ) as Non-Bamboo area after excluding these values in image classification. However, these classes appear in 2 rows in legends ...
Pushkar's user avatar
  • 83
0 votes
1 answer
52 views

How to enable the image classification tool in ArcGIS

I intend to perform a supervised classification on a TIFF image in ArcGIS 10.8. The image is an imagery of an area which I downloaded from my ArcGIS Online account. The goal is to automatically ...
Tsaku Graham's user avatar
0 votes
1 answer
143 views

Calculate area under each class for a feature in a shapefile

I have a shapefile that you see in attached picture and you can see it has eight classes for a feature shown in picture. How do I calculate area under each class. I would like to export area ...
QGIS_krig's user avatar
0 votes
0 answers
64 views

Google Earth Engine Error for random forest classification

I am working on random forest classification to distinguish corn areas, and defining train and test data but I faced an error. classification: Layer error: ErrorMargin, argument 'value': Invalid type....
bahare bahmanabadi's user avatar
0 votes
0 answers
21 views

Image (Error) Property 'NDVI' of feature '0_0' is missing

when I was working on classification for crop mapping to find maize fields, I faced the error. I made samples using geometry and named it trainingdata which indicate maize fields. Besides I tried ...
bahare bahmanabadi's user avatar
0 votes
0 answers
13 views

losing classified values when converting from .tif to .asc (for Maxent)

I have 10 aspect values in a .tif generated by ArcGIS from a DEM file. When I convert to .asc (necessary for Maxent) it becomes a single value arc from -1 to 360(m). I need to use this as a ...
Tal_1's user avatar
  • 1
0 votes
0 answers
19 views

Land cover classification of different acquisition dates

I am doing a land cover classification of a large area, therefore all the images over the area do not all have the same acquisition dates. This results in my output having visible borders: The images ...
GISJess's user avatar
  • 125
0 votes
1 answer
48 views

Does Landsat satellite image should have raster value to -1 and 1?

I am calculating the NDVI for Landsat-8 using the formula as shown below:- But the pixel value rendered is as shown below: - But the NDVI values need to be between -1 and +1 however, the value ...
Pushkar's user avatar
  • 83
1 vote
3 answers
82 views

How do I classify contour lines on specific levels?

I have a shapefile with contour lines. When I go to classify it to decimeter interval it chooses some rounded off to for example 5,8 while 5,7 is classified by 5,70000001 or simliar. How do I go about ...
Igzie's user avatar
  • 11
0 votes
0 answers
29 views

Generalization of classified raster: reassigning class after Region Group and Nibble

I want to do a Generalization of classified raster in ArcGIS as it is described here: Generalization of classified raster imagery. The documentation includes following steps: 1. Majority Filter, 2. ...
Katrin's user avatar
  • 1
0 votes
0 answers
59 views

How to classify points in LAStools using shapefiles as reference

I am new to LAStools, and mostly use MicroStation/Terra for classifications, except MS is a resource heavy at times so can be slow and can crash. The macro we run uses shapefiles as a reference, and ...
Warrick Allen's user avatar
0 votes
0 answers
47 views

Performing image classification with both a classifier definition file and a segmented image in ArcGIS Pro

I am performing object-based classifications in ArcGIS Pro in the form of two separate rounds of classifications. In the first round, I obtained a drone image and uploaded it to GIS, I manually ...
Matt Dupasquier's user avatar
0 votes
1 answer
64 views

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 ...
Nkogho Uchenna's user avatar
0 votes
1 answer
94 views

File not found, no such file or directory in GEE python

I follow step by step in : https://geemap.org/notebooks/33_accuracy_assessment/#split-training-and-testing When the step to download confusion matrix, there is error. I type the code : import csv ...
mega saputra's user avatar
-1 votes
1 answer
31 views

Join attribute table - 2 different layers - 2 different classifications (QGIS)

I have 2 vector layers, one containing cells on a municipality level and one containing a more detailed classification on a district level. Some municipality contain multiple districts, whereas other ...
Ann's user avatar
  • 1
0 votes
0 answers
54 views

Get working of Random Forest in GEE in understandable form

I used this code to see decion tree in RF GEE: var decisionTrees = ee.List(trained.explain().get('trees')) print("Tree decision", decisionTrees) I get this: Tree decision List (29 elements) ...
Ludmila VT's user avatar
0 votes
1 answer
83 views

Merging training points for classification (Random Forest) using L9 data in Google Earth Engine

I am not able to merge training points using Google Earth Engine code. I am very new to Google Earth Engine. The code which is tried is var dataset = ee.ImageCollection("LANDSAT/LC09/C02/T1_L2&...
user28542's user avatar
  • 320
0 votes
0 answers
69 views

Semi-automatic classification QGIS plugin not responding

Trying to use search in Semi-automatic Classification plugin as part of QGIS and it is not responding. I have searched parameters for Bonn in Germany and dates from 2020-04-01 to 2020-05-07 with cloud ...
Nigel's user avatar
  • 1
1 vote
2 answers
125 views

Classification using Google Earth Engine JavaScript API

I am trying to classify the Bostanliq area of Uzbekistan. Everything is fine unless my final result does not give Forest even though I collected many samples for that class of land. My code: var ...
Bokhir Alikhanov's user avatar
0 votes
0 answers
38 views

Blank classification output in Google Earth Engine

I tried to classify the Landsat images from 2013 to 2022 using the random forest classifier. I have used the below code which has been modified from the one available here. The original code was for ...
Pratibha 's user avatar
3 votes
1 answer
109 views

Classify vegetation by height

Trying to further classify a las catalog that already has buildings, bridges, noise and ground classified. I want to break the unassigned points into vegetation classes by height but can't get it to ...
pseudotsuga's user avatar
0 votes
1 answer
59 views

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 ...
Aaron_Elph's user avatar
0 votes
0 answers
16 views

Radiometric standardization for Landsat5 and Landsat8

I'm currently encountering an issue with classifying LULC. The first image I have is a false color composite taken in 2020 using Landsat 8. However, the second image, captured in 2010 using Landsat 5, ...
Jubier 's user avatar
1 vote
0 answers
144 views

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 ...
avaruus's user avatar
  • 11
0 votes
0 answers
53 views

FeatureCollection (Error) Array: Max (NaN) cannot be less than min (NaN)

I am trying to do Object base Image classification, but my code giving me this error, I tried to fix it but nothing worked. This is an error, "FeatureCollection (Error) Array: Max (NaN) cannot be ...
Muhammad Waqas's user avatar
1 vote
1 answer
29 views

Showing data in increments on map using ArcGIS Pro

Let's say I have a feature class with numerical values say age greater than 0 and so on. How can I show them classified them in such a way that these values are shown in increments of 20 on the map in ...
Arthur_Morgan's user avatar
0 votes
0 answers
25 views

I want to perform classification on two different classes using training data but it won't work

I've been trying to classify mangroves using training data consisting of 2 classes: 0 and 1. I tried using both SVM and smile forest classifiers and they just show the class labelled "1". So ...
Bara's user avatar
  • 13
1 vote
1 answer
43 views

I can't seem to get the classification for the 2010 LANDSAT

I've been trying to make a script that pulls 2010 and 2020 landsat images, calculate the NDVI from those images, then classify both of them to see the extent of change in vegetation in the area using ...
Bara's user avatar
  • 13
0 votes
0 answers
25 views

Some of my LULCs do not show up in classification

I am trying to do LULC classification with seven classes using Landsat 8. when I finalize the classification, some classes do not show up in the report. Here is the gee link https://code.earthengine....
Laldu's user avatar
  • 1
0 votes
0 answers
19 views

Class disparition after using a classifier in SCP plugin for a classification

I use a classifier in SCP plugin for a classification. I don't have any problem for load and the treatment works. However, my first class disappears for each test. For example, if my classifier ...
loic71's user avatar
  • 1
0 votes
1 answer
54 views

Is it possible to add attributes to a vector layer from csv table based on class name?

I have a vector for the region of interest, where each polygon has a class value. Also I have a classification table there each row contains a class name and class parameters in other columns. I want ...
Nikolay Yasinskiy's user avatar
0 votes
1 answer
229 views

Create multiband raster from .las file using PDAL

I am quite new to creating rasters from point cloud (.las) files. Basically, I would like to use PDAL and its writers.gdal stage to write a raster with two bands. The first band should be written ...
user224802's user avatar
1 vote
0 answers
95 views

Rename LAS point cloud classification

I'm looking for a way to change a las classification name. Want to change class 64 unknown to class 64 Culvert. How do I change the name of the las class? Is it best to do it within the LS header?
Shaun's user avatar
  • 11
0 votes
0 answers
83 views

Raster turns black and white in ArcMap

So, I have been doing land use classification using SCP in QGIS and then I exported the raster as GeoTIFF file. I try to open this raster in ArcMap but it shows black and white and no classification ...
Zon Zahidan's user avatar
1 vote
1 answer
46 views

Classify Pointcloud using thematic layer with lidR

I want to use lidR to classify points within a point cloud using a few thematic shapefiles. This includes buildings, vegetation and cars. For this I use the classify_poi function, which works for ...
FelixB.'s user avatar
  • 109

1
2 3 4 5
15