瑶溪街道积极部署“创模”省级预评估迎检工作
百度 ”就这样一步一步的，大家就稀里糊涂的刷了卡，多的一万，少的一千多。
Image classification refers to the task of extracting information classes from a multiband raster image.
148 questions
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Unable to use "Draw polygon" tool to add training samples for supervised classification
I am trying to gather samples using "draw polygon" tool for supervised classification on my ArcGIS 10.8. Despite enabling the image classification tool, whenever I draw shapes from the ...
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SCP Error: WARNING-ROI not found
I'm trying to create random points on my raster image for accuracy assessment (using the Semi-Automated Classification Plugin), but the points won't be imported into the training input file (on the ...
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Training samples not get saved
After preparing and saving training samples for supervised LULU classification in ArcGIS pro, subsequent edits to class attributes (e.g., correcting mislabeled water body samples under the built-up ...
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65
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Save training samples with the training samples manager to be able to edit them later while doing Image Classification in ArcGIS Pro 3.4.0
I made some training samples using the Training Samples manager, but didn't have time to draw polygons for one of my classes. I saved the schema to edit later, but the "generate from training ...
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66
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Using sampleRegions in Google Earth Engine when combining Sentinel-1 and Sentinel-2 datasets
I'm trying to perform classification in Google Earth Engine using Sentinel-1, Sentinel-2, and SRTM datasets. When using only Sentinel-1, the sampleRegions function works perfectly, but when I add ...
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41
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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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76
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ArcGIS classification and accuracy assessment NoData class and error generating accuracy points
I'm trying to classify a clipped Landsat raster and then do an accuracy check for a watershed. When I do classify my clipped watershed, the region outside the ROI also gets classified i.e. the NoData ...
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522
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Exporting an image collection as an asset
Is it possible to export each image from image collection as an asset? If yes how can I improvise this code?
// set cloud threshold
var cloud_thresh = 40;
// Cloud mask function
var ...
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144
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How to extract random points from a list of polygons in Earth Engine (classification accuracy assessment / "is not a function")?
I am working on an accuracy assessment for my classification and want to do this using random sampling of points from a validation part of my training areas. For this I split the training areas into a ...
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1
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838
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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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134
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GEE Classification Error Multiple Geometry types
I came to the issue of Out of Memory Error when I tried to do a supervised classification of an image using a shapefile polygons as underlying featureCollection in GEE.
It turned out that some of the ...
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279
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Apply Sieve in Google Earth Engine
Without applying a filter function like the mode or similar, I want to apply a sieve to a raster with two classes.
Let's say I have a raster with pixel values 0 and 1; I want to remove groups of ...
- 313
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40
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Train images classifier not working on orthomosaic GeoTIFF file
When I run the train images classifier on an orthomosaic or orthophoto by OTB in QGIS it generates me not just a file with .txt extension but by default it starts generating .txt.shp, .txt.shx, .txt....
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1
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748
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How to do post-classification / eliminate isolated pixels in Google Earth Engine
I am trying to apply post-processing (Classification Sieve) in GEE to my classified raster, just as we apply in QGIS (used 4x4) or (8x8). Remove unwanted and noise pepper effects from the ...
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265
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How to Fix: Layer error: Computed value is too large in Google Earth Engine
I conducted a landcover classification, distinguishing between mangrove and non-mangrove areas. For each landcover type, I gathered fewer than 10 samples. I utilized Random Forest (RF) for ...
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