Questions tagged [pixel]
In digital imaging, a pixel, or pel (picture element), is a single point in a raster image, or the smallest addressable screen element in a display device. In GIS applications, a pixel may also refer to an imagery layer or other raster data.
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Wet and dry pixels [closed]
I want Google Earth Engine code that has dry pixels (pixels that are not affected by the flow of the river and have a relatively constant reflection) and points that are affected by the river flow and ...
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Remove pixels from a raster in QGIS
I have a raster map and I would remove isolated pixels or groups with less than 4 adjacent pixels. How can I do it in QGIS?
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GSD or pixel size for volume
When I want to calculate the volume of a building polygon (in my case), do I use the GSD that I received in a WebODM report or the pixel size of the elevation raster? What is the difference between ...
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QGIS DEM to elevation Points, pixels not centred
I have a DEM which I'm trying to convert into a point layer in QGIS. I used the raster pixels to points tool, which seemed to work, except that the points are not in the centre of the DEM pixels. They ...
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What are the shades (vertical lines) in the orthomosaics?
I am an expert on my field.
I work with remote sensing. Mostly UAVs. I collect datasets and extract features from it.
This year, I started collected with the Astro Freefly and the Sony A7RIV sensor (...
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How calculating green canopy cover differs from the sensor utilized
I am an expert on my field.
I work with remote sensing. Mostly UAVs. I collect datasets and extract features from it. One of the features is 'green canopy cover' (https://acsess.onlinelibrary.wiley....
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Converting latLng to screen point
I have a map in RN app on iOS and I have and overlay outside of the map
Inside overlay I need to draw a View with some absolute position that will match some LatLng coords on the map
I know screen ...
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Extracting forest patches using square Kernels around shapefile point data in Google Earth Engine
I have an image representing global forest cover named minArea. Pixels are valued 1 or 0 (tree cover or no tree cover).
I also have a shapefile imported through my assets of XY coordinate data. ...
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Pixel by pixel comparison in Google Earth Engine
I have attempted to write a surface water detection program in GEE using the NDWI, with otsu thresholding and canny edge filtering. I would like to evaluate my approach and I was thinking of using the ...
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How to create a layer with only the isolated pixels using QGIS?
I have a raster (with one band) of a land and there is some islands surrounded by No Data.
I would like to create a layer consisting only with these isolated small groups of pixels (group maximum size ...
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Improve image quality of "Decoration"
I imported a key using Decorations -> Image in QGIS 3.32 and the quality is poor, especially if the image is made smaller. I do not mean that the actual image file is small, but that displaying the ...
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How to save the error: Array: No numbers in 'values', must provide a type
I'm a beginner of coding and GEE.
I'm trying to extract the NIR and Red band time series data of each pixel in the survey area with cloud masked.
However, when applying the code below I used to do ...
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Shifting existing points (shapefile) to the highest raster pixel value in 5m buffer
I am trying to move 1700 points (of an existing shapefile) to a new pixel of a raster layer. If the dot is already in the highest pixel of the NDVI raster layer then no need to change.
The criteria ...
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Adding pixel-level classification to ee.ImageCollection
I am working with ee.ImageCollection('LANDSAT/LE09/C02/T1_L2') data pulled from earthengine-api in Python.
I have previously defined a function to mask cloud, shadow, water, and snow. based on the ...
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No numbers in 'values', must provide a type
I'm facing an error when trying to export all the pixel value of a ImageCollection.
The error is :
But when I check the corresponding image in my dataset I don't see anything different from the other....
