Questions tagged [band]
A layer in a raster dataset.
142
questions
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24
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What are the mesh and raster layers in QGIS that are included when a GRIB2 file is imported?
I am currently working with grib2 files from the RDPA dataset in QGIS.
When one of these grib2 files is imported, there is a raster layer and a mesh layer that is generated. I am struggling to ...
- 89
1
vote
1
answer
38
views
Band calculations using satellite images captured on different dates
I want to do some band calculations using bands taken from multi spectral (MS) satellite images and bands from a short-wave infrared (SWIR) image. I have one SWIR image covering the whole area of ...
- 101
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votes
1
answer
79
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Exporting four band TIFF for transparency (alpha channel) using ArcMap
I am using ArcMap 10.8. I try to add a fourth band with my TIFF to extract it by mask and NOT have a black box arroud with NoData values. In the end I need a four band PNG with transparency layer. ...
- 59
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votes
0
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47
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Bamboo Index value for Sentinel-2 not rendering between -1 and +1
I created a composite band using last 5 years i.e., 2023, 2022, 2021, 2020, 2019 Sentinel-2 image for NDVI map and SI (Soil Moisture Index) map preparation. Then I created Bamboo Index (BI) map
from ...
- 83
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61
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Different Band Values For NDVI Calculation For Composite Band
I created composite map using individual NDVI map of Landsat-8 from 5 years. However, I am confused with the NDVI value rendered after creating composite map. I got different values of NDVI for ...
- 83
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1
answer
117
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What are the equivalent band combinations in Sentinel-2?
The following is the band combination of RGB to represent in natural colour, vegetation analysis, infrared colour for Landsat-8: -
Natural Colour:- 4 3 2
Colour Infrared (vegetation):- 5 4 3
Healthy ...
- 83
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votes
1
answer
28
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Raster band values affecting analysis in ArcMap
I've been trying to clip a raster data but the output each time has different band values resulting in different symbology.
I checked online and it seems there is no applicable solution, and I even ...
- 5
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1
answer
141
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Overlapping different year NDVI Map using ArcMap
I have created a NDVI time-series map for 5 different years. Now I want to prepare a combined raster band of the 5 years' time interval to form a single combined raster band.
How can this be done in ...
- 83
4
votes
1
answer
163
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Generating new raster by combining the values of two separate ones in Python
I have two rasters in the same coordinate system and the same resolution which I am trying to combine in Python using a specific formula. I managed to replicate this in QGIS by going to Raster -> ...
- 143
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1
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50
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Merge raster data whilst keeping min value and their layer name [closed]
Using numpy and arcpy I can’t figure out a method to do the following:
Merge two rasters which have identical cell alignment keeping the minimum value (e.g compare the pixel values and keep minimum)
...
- 1,516
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55
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Select a specific band in GRASS (QGIS)
In GDAL you can use flags like
-b 1 -b 2
to select individual bands from a multiband raster
In Arc you can sometimes use "...\whatever.tif\Band_1" to select an individual band
Can you do ...
- 107
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0
answers
19
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What are the band units of L8C2L2 before applying the scale factor?
Bellow there is an image which shows "Collection 2 Landsat 8 Level 2 Science Products Band Specifications". When I use the multiplicative scale factor and the additive offset on Band 10, I ...
- 123
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52
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Optimizing the value of pixels using Quality Assessment Bands using ArcGIS Pro
I read that, Landsat Collection 2 Level-1 and Level-2 Quality Assessment (QA) bands provide useful information to users wanting to optimize the value of pixels as a first level indicator of certain ...
- 123
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2
answers
38
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QgsRasterCalculator not writing any output nor showing error codes
I am trying to use QgsRasterCalculator to do some calculations. However, my script does not output anything. It also doesn't show any error codes, it just executes without writing the desired output ...
- 197
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votes
1
answer
396
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QGIS Python script with Raster Calculator
I have a large set of radar .tif files with several bands, and I would like to have some Python scripts to perform some basic operations that I would usually perform using the Raster Calculator in ...
- 33
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3
answers
402
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Earth Engine GEE Abnormally low NDBI values derived from Landsat 8
I wanted to compare Landsat-8 NDVI and NDBI in a city using the codes below. I am using similar formulas. However, the NDBI value is abnormally low, compared to NDVI, and compared to raster calculator ...
- 1
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79
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Band Combination for NIR-R-G in Landsat 7 scene
What is the order for the band combination to show Landsat7 scene in NIR-R-G Band? The band combination I used is:-
And the result generated is:-
Is this the correct layer combination to show ...
- 183
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vote
1
answer
674
views
Calculating vegetation indices NDRE AND RECI using Sentinel 2
I am trying to calculate NDRE and RECI using Sentinel imagery ON ArcGIS software . For RECI( RED EDGE CHLOROPHYLL INDEX) the formula is (NIR/RED-1).
Can you tell me which band to use in order to ...
0
votes
1
answer
77
views
Image (Error) User memory limit exceeded
I was trying download spectral bands. Below show my scrip, the first part do a mask for take off land cover i don't wish. After, i do a date cube, for download the spectral band, where each band is a ...
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2
answers
150
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Issue in applying condition expression to all band values in Google Earth engine
I want to apply the following condition statement to all the pixels of an indices image having only 1 band. The condition is as follows-
For that first I have calculated the mean value of my image. ...
3
votes
2
answers
468
views
Automatically importing and merging bands in each folder from QGIS
How do I automatically import and merge the bands in each folder from QGIS?
The C:\landsat path contains the Landsat 5 image folder.
Inside each folder is a Landsat image.
I want to automatically ...
- 467
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votes
2
answers
131
views
Can I change the max band value of sentinel 5P methane in GEE?
I am working on GEE using Sentinel 5P methane dataset. The min and max band value for this dataset is 1750 and 1900 ppb respectively. When I run the code using this value, I get majority areas to be ...
- 3
2
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0
answers
443
views
Getting Sentinel-2 raster values for points on Google Earth Engine
I am calculating TSM and chlorophylle in a river, for each parameter I used a function to create a new band that gives me information about each one. First I want to calculate the mean value for ...
2
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0
answers
100
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Error Showing With Python-"ee.ee_exception.EEException: Image.select: Pattern 'B4' did not match any bands."
I'm working on estimation chlorophyll-a using a Landsat 8 image woth python code and then I’m trying to build an web-app which is using streamlit and geemap library. But my map doesn’t showing when I ...
2
votes
1
answer
493
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Coding in Google Earth Engine for common ratio and band combinations used in mineral exploration
There are common ratio and band combinations throughout the geological literature, for example: ASTER Mineral Index Processing
Manual
I am trying to use Google Earth Engine to replicate some of these ...
- 21
1
vote
0
answers
315
views
Defining non-color channels as ExtraSamples
I run a PYQGIS script to calculate mean and stdev of an area for one specific raster-band.
processing.run('native:zonalstatisticsfb',{ 'COLUMN_PREFIX' : '_', 'INPUT' : '/Users/pugliesipc/Desktop/...
- 155
0
votes
1
answer
524
views
Adding function as band to image collection in Sentinel-2
I need to assess TSM in a river using Sentinel-2. Which is why I need to add the function of TSM as a new band. I used Adding multiple indices as bands to image as a guide but it is not working for ...
1
vote
1
answer
578
views
Spectral signature doesn’t match band set in SCP Plugin
I'm trying to do a supervised classification to see land cover change using the Semi-Automatic Plugin in QGIS. After I create my ROIs and try to assess the spectral signature plot for the ROIs, I ...
- 11
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votes
0
answers
85
views
Why is my image not showing and in my metadata it says that my band is 0?
I'm working on estimation chlorophyll-a using a Landsat 8 image on Google Earth Engine but my image is not showing, and in my metadata it says that my band is 0. I'm really really confused because I'...
0
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0
answers
120
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LANDSAT-7 strange strip on SWIR bands (B5 and B7)
I was exploring Landsat 7 data on SentinelHub and came across with this strange strip in the SWIR band B7 (also B5):
By placing a pin in this strip and exploring the stats, I found that there is no ...
1
vote
1
answer
633
views
Set a property as a band value in Earth Engine
I have an image collection of MODIS monthly burn (MODIS/006/MCD64A1), in which BurnDate band is selected. I then have a function that calculates total burned area for each image (monthly). However, ...
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-1
votes
1
answer
89
views
Extract one band from a multispectral raster PyQGIS
I want to extract red band, from a multispectral raster with 5 band, using PyQGIS.
I tried this code, using the GDAL rastercalculator. I tried to extract the 3 bands, and then calculate my index.
...
- 59
1
vote
1
answer
167
views
Image time series chart not reading bandName property in doy.SeriesByRegion
Here is part of my code for creating a time series chart in GEE.
var addLST = function(image) {
var LST = thermal.expression(
'(Tb/(1 + (0.00115* (Tb / 1.438))*log(Ep)))-273.15', {
'Tb': thermal....
- 15
2
votes
1
answer
263
views
Why does GDAL's 'GetDescription' function return an empty string?
I have used GDAL to add descriptions to my raster band. I have verified in QGIS that the bands are indeed correctly named. I use the following function for adding names as band descriptions, which has ...
- 711
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votes
2
answers
588
views
Hiding raster bands/palette in Layers panel in QGIS
I often have to load a lot of rasters at once into QGIS. Unfortunately, most of them appear with a "Legend" wich shows their bands (or palette for single band rasters). This takes a lot of ...
- 2,862
3
votes
1
answer
874
views
Calculate mean for each band in raster
I'd like to re-visit this answer given by Aaron that uses gdal and numpy to calculate the mean value of each band.
Issue 1: With large TIFFs ~ 5-15GB, I am running into a memory error. I am wondering ...
- 1,290
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vote
2
answers
52
views
Hiding pixel of one layer based on pixel value of other layer
I have a raster layer that contains multiple bands. I want to visualize one band in particular, but only the pixels that have a value of 0.6 or higher in another band of the same raster layer should ...
1
vote
0
answers
361
views
Subtracting each image in two image collections in Google Earh Engine
I have two image collections with 14 images each. I need to subtract the first image of the first collection to the first image of the second collection, the second image of the first collection to ...
- 138
9
votes
2
answers
10k
views
Exporting single band from multiband raster in QGIS
In QGIS 3.16.8 I have a raster image in TIFF format which has 17 bands. I need to extract different band combinations as separate image files. Some of the combinations consist of images with single ...
- 93
3
votes
1
answer
603
views
Make multiple values of a raster layer transparent
I have a raster image with a single band with 0 to 255 values styled with a palette of colors. One of the values/colors I want to make transparent is 123, so I added it in the Additional no data value ...
- 922
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votes
1
answer
73
views
Bad image output in QGIS [closed]
I have created an Orthomosaic .tiff file from multi-spectral images using Agisoft Metashape. Now that I am trying to analyze the image using QGIS, I get a bad image, and I do not know how to fix it.
...
- 29
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votes
0
answers
146
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Band ratio with Euler's number in Google Earth Engine
I've band ratio with exponential equation and Euler's number
band_ratio = (0,0039e)^(2,4952*(B2/B4))
Can anyone write it in Google Earth Engine format?
Or just input the Euler's number?
- 123
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votes
1
answer
121
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How to make histogram of NIR band bimodal enough to differentiate water from land in GEE? [closed]
I am interested to map water bodies in a desert from swir band of sentinel 2.
How I can make a bimodal histogram in GEE?
I have one reference water body in scene.
Is it possible to do the same in ...
- 105
1
vote
0
answers
52
views
Working with just one band to get a new map
I need to create a new image using a dataset that have just one band ranging from 0 to 30. The new image that I need must have just 2 pixels value (0, 1) with 0 being deforested between 2010 - 2020 ...
1
vote
1
answer
446
views
Band Names in Google Earth Engine - Modis LST data
I am working with some modis LST data, and am running into the following problem:
I am running two functions on the data, which I will need to combine later. For that reason, the band names need to be ...
1
vote
1
answer
758
views
Band value selection in Google Earth Engine
I am working on Sentinel-5p NO2 data in Google Earth Engine. The band value of 'NO2_column_number_density' starts from negative numbers i.e.(Low : -1.34484e-05) but I need low value to be start from 0....
1
vote
1
answer
381
views
Subtracting image value from corresponding month from image collection in Google Earth Engine
I have extracted sea surface temperature(SST) images from Google Earth Engine for a specific time period and region
var start = ee.Date(2012-01-01);
var end = ee.Date(start).advance(1,'month');
...
- 515
1
vote
1
answer
803
views
Transfer feature details from WMS to raster file
I need to export a WMS Map in a raster (QGIS) as I would like to do a zonal statistic after I need the WMS raster values. I can see them in the Identify results panel. The WMS has single Band color ...
- 13
1
vote
2
answers
3k
views
Image dimensions in Google Earth Engine
How can one get image (band) width and height on the server side?
On the user side you do it with image.getInfo().bands[0].dimensions, following Extracting information from Google Earth Engine image ...
1
vote
1
answer
720
views
Google Earth Engine: set band as property without reducing
I have a function that takes an ImageCollection and sets a mean value as a property for another ImageCollection.
var DHW = HS_SSTA_7d.map(function(im) {
var res = im.reduceRegion(...
- 515