Questions tagged [multi-band]

Raster data with more than one band/channel of information. Also known in imagery as multi or hyper spectral.

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Stretch to MinMax results in blank render output in QGIS?

I am a new QGIS user, and I can't figure out if I encountered a bug. If I have a multi-layer image, and "Multiband color" -> "Stretch to MinMax" selected I get the following behaviour. QGIS takes a ...
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3 votes
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103 views

Python stops during band algebra in GDAL calculator within modeler in QGIS

I'm trying to calculate four greenness indices using the GDAL calculator within the graphic modeler in QGIS 2.14.7 Essen. The tool systematically crashes with a Windows message stating that Python ...
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How to set band names of multi-band GeoTIFF asset upon upload to Google Earth Engine

I have created a multi-bands GeoTIFF using xarray in Python following this answer. When I display this raster or open it in QGIS, all the bands are named following the variable they represent: ...
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Imagery Alpha and Mask channels: when should each be used?

Gdal supports both Mask and Alpha channels. In what circumstances are they best applied? How to choose between them? For example the nearblack utility to change image collar pixels to nodata can use ...
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Calculating proportion of pixel containing vegetation (from sentinel 2 image stack)

My task is to perform a supervised classification of landcover across a huge (20,000+ hectare) property. I need to classify into three classes: forest, regenerating trees, and soil. We use s Sentinel-...
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Layer stacking Multispectral reflectance imagery in ERDAS Imagine 2016

I have Green, red, Red edge and Near infra-red reflectance maps captured with a Parrot Sequoia camera and post processed with Pix4D. They are all Single Float Tiff files, around 500Mb in size. I ...
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2 votes
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152 views

Generate an accurate DTM with photogrammetry?

I generated imagery from a low flying drone (40 M AGL) equipped with a mica sense RedEdge multi-spectral camera and have processed the imagery in PIX4D and now am attempting to do some analysis in ...
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2 votes
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326 views

GDAL - Polygonize multiband raster and save pixel values of each band to corresponding attribute fields

I'm trying to polygonize 2 band raster(which was previously reclassified) and put values of each band into seperate attribute table column. Both bands overlap each other perfectly. This piece of code ...
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Multi/hyper-spectral file format that stores band information and meta-data

I usually use ERDAS LAN file format drivers to create a multispectral file that contains multiple rasters of different spectral bands. However, I can't find a way to store the information regarding ...
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Keeping band names with gdal_merge.py?

I am using gdal_merge.py to merge different mosaic rasters each contains 20 bands with different names. However, when using gdal_merge.py the bands are renamed as band1, band2, ..., band20. How can I ...
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Multiband WMS request returns incorrect image depending on bbox, width, height params

When making WMS requests to view band 1 of a two band imagemosaic layer the image returned isn't always valid. Sometimes I only get an image with a very sparse set of pixels. Whether or not the ...
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173 views

Layer Stack 6 Landsat8 bands

I have 6 images from Landsat 8 (Green,Red,NIR,SWIR1,SWIR2,NDVI). When I want to layerstack them with "Merge" I always get a result tif which is just black and white, however I can see that all 6 bands ...
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Add Rasters to Mosaic Dataset eliminates bands using ArcGIS Pro

I am trying to create a mosaic dataset that can have any MAXAR imagery added to it (i.e. 4 band GeoEye or 8 band WorldView-2). In order to do so, I have created a Mosaic Dataset without specifying the ...
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No features contain non-null values of in graphy

I want to graph the NDVI series by another classified image, but when I graph it there is a wrong No features contain non-null values of "system:index". Howvever I already set the system:...
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139 views

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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Extracting values from bands in raster where one band has two values using QGIS

I am working with QGIS and have a raster file with two bands. Band one contains two values, event types, and Band 2 contains a date where the amount of a Band one event occurring sums up. An example ...
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How do I create a virtual raster in QGIS combining single-band raster layers and a multi-band raster?

I have a raster with 21 bands. I also have 12 other raster layers with a single band each. I want to create a virtual raster combining the multi-band raster and the single-band raster layers, ...
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Extracting spectral signatures from ROI using ENVI5.3

I used ENVI's Band Math functionality for calculating a certain index to find out the dominance of a mineral. The output is one monochrome band as seen below, I really need your help to learn how to ...
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74 views

Converting point vector with many fields to multi-band raster

I have a shapefile of evenly spaced points which I'd like to convert to a raster. In QGIS, I know I can do this with Raster > Conversion > Rasterize (Vector to Raster). However, I see the ...
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Python - Calculating Burned Area Index results in empty plot

I've followed this tutorial to calculate the dNBR Index, using the given sample tif files which contain a burned area. My results were as shown on the tutorial. So far so good. Then I tried to ...
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146 views

How to mosaic/align multispectral georeferenced images into one merged file with GDAL

I am trying to work my head around how to make mosaic from georeferenced multispectral images. Header of those images already contains information about GPS location. Separate image is saved as *.tif ...
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254 views

Converting multiband .nc files using R to upload to Google Earth Engine

I am new to using .nc files and am struggling to get the output I need in GeoTIFF format to upload to GEE. I have downloaded the 2015 zip file of fire data from the CCI archive here: http://data.ceda....
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1 vote
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25 views

Set display options for more than one layer in ArcGIS Pro

I am trying to set display options for more than one layer in the ArcGIS Pro software. The task is to activate 3 raster layers at the same time in order to create a new pseudocolor map with bands. I ...
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31 views

Visualizing True Color Remotely Sensed Images

I am following this tutorial (which is also on GitHub) and I can't seem to understand this line of code: np.clip(eopatch.data['BANDS'][closest_date_id][..., [2, 1, 0]] * 3.5, 0, 1) I am guessing ...
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1 vote
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30 views

Multi-temporal stack does not include all bands

I made a stack of images for a multitemporal series for 7 months (one per month with 5 bands) with gdal, but the stack that comes out to me consists of a single band for each month, probably the first....
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1 answer
192 views

Merging multiple satellite bands for science data set rasters?

I am using MODIS satellite imagery data for one specific derived band. The problem I am running into is that it is a MCD19 SDS layer, which contains different bands for each orbit overpass at a ...
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150 views

Merging satellite images error

I am trying to merge 3 satellite images of 3 times. The images are median images. I have used the following code but there is an error. var maskL8 = function(image_m) { var qa = image_m.select('BQA'...
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15 views

Inner workings of GRASS reclassification on QGIS. How does it work with multiband rasters?

I have a 33 band raster layer I need to reclassify. I tried using GRASS module inside QGIS and it worked out fine, except that it outputs a raster with a single band. Which band of the 33 did it ...
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136 views

To create Categorical Heatmaps in Qgis do I need 1 heatmap or 1 per layer for each category

In Qgis 2.18 I have a points layer and can create a raster heatmap for all the points with singleband pseudocolour. If I wanted to show separate categories as different colour ramps do I need to ...
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  • 302
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Preparing multi class from multi value of raster data?

How can I prepare a specific band for each value in the below photo? This raster file is a result of classification which I prepared in ENVI and for some edits I imported it in ArcGIS. after ...
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  • 11
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63 views

How to preserve old range of values clipping multi-band raster in QGIS?

Old raster: New one after use of "clipper" or GDAL clipping: Is it any other (faster) method than "save/load style" to preserve previous values of raster? I'm running QGIS 2.14.
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68 views

Automate band combination process

Everytime I get a new scene, I have to build a specific number of band combinations. It's almost 50 band combinations. I have to do it for almost every scene, over and over. Is there any automatic ...
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450 views

Database of labeled hyperspectral imagery

Are there any datasets of hyperspectral imagery that can be used for AI training and classification, comparable to ImageNet? The Universitat de Valencia has one listed on their site, HyperLabelMe, but ...
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28 views

Ingest 8-band satellite imagery into an array in C?

I’ve been unable to locate a lightweight library implemented in C to ingest 8-band geotiff files. GDAL can do this easily in python, though I’ve been unable to get the GDAL C libraries working; I’ve ...
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1 vote
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152 views

NetCDF to Raster in ArcMap 10.3 - selecting Band Dimension stalls out

I am using the "Make NetCDF Raster layer" tool in ArcMap 10.3 and have had great success with relatively large files. I usually select the Band Dimension (time) using the tool or sometimes after the ...
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1k views

Creating a Greyscale DEM from Multiband (RGB) GeoTIFF in QGIS

I'm trying to merge some river bathymetry with LiDAR from the surrounding riverbed using QGIS 2.14.0 Essen. The river bathymetric data is a GeoTIFF, and it comes with a separate scale associating the ...
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1 vote
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37 views

Band Separation from regular cameras

I have removed the IR block filter from a Sony digital compact camera so it has become multispectral (in a way). In addition to that I placed a IR pass filter, so it only captures photos in the Near-...
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175 views

Extract by mask/copy raster a RGBA (4bands) raster results in a greyscale image in photoshop discarding all RGB composite info

I used a polygon Shapefile to extract by mask (ArcGIS) the sea area from a RGBA (4 bands aerophoto) raster. The Extract by Mask caused up-sampling from 16 bit (my raster's initial pixel depth) to 32 ...
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748 views

Batch GDAL_Calc multiple band calculation

I have a question concerning gdal_calc. I´m running windows 7 64b and am working from the OSGeo4W shell. I have multispectral images that need to be prepared for analysis but they are not saved in a ...
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409 views

How can I create a multi layer exportable file (.xcf .psd) from multiple raster image in QGIS?

I have many raster file of the same zone but in differents spectral bands. I would like to create an exportable file of a small portion that can handle different layers. So in practice I would like to ...
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30 views

Exporting virtual raster in QGIS

I have multispectral images collected from parrot sequoia. I want to merge all 4 different bands and create a single .tif file. I created the virtual raster layer with all the bands included in that, ...
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2 answers
23 views

Calculate seasonal precipitation and temperature from CRU TS 4.05 in ArcGIS Pro

The Goal: To calculate the average spring (Mar-Apr-May) and summer (Jun-Jul-Aug) precipitation and temperature for a series of specific, discrete locations. These points represent sites (I'm an ...
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  • 1
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Extract a single pixel of data from multiband time series of raster (TIFF) images in Python

I have two folders of .tif files (41 and 49 rasters, respectively). The rasters are multi-band (14) and of the same location (same extent, boundaries, etc), just on different days. I would like to ...
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16 views

Multiband rasters not displaying properly in ArcMap

I have a multiband raster and have found an issue with its display in ArcMap. It is made from two spatially co-indicent rasters which, when viewed in ArcMap, display as such: Raster1 and Raster 2 are ...
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43 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/...
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  • 115
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23 views

Approaches to distinguish bare soil from artificial soil in an urban context with Pleiades imagery?

My colleagues and I are trying to improve an existing landcover map by improving the distinction between bare soils and artificial soils (e.g. concrete, asphalt). We need a good detection of bare ...
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  • 101
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77 views

Dividing reflectance values of Sentinel-2 sets of bands using rasterio

I need to divide the reflectance values of a Sentinel-2 sets of bands. To do this, I have to divide each band by 10000 when I read in the band to write the stack. I have an example of my code snippet ...
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  • 1
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48 views

How to polygonize multi-band rasters to vectors with multiple attributes?

I'm using Python, and I usually polygonize rasters using rasterio like in this thread : How to polygonize raster to shapely polygons However, now face a new problem, I have two rasters with same ...
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  • 1
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59 views

How to create nodata area in a multiband raster?

I am running QGIS 3.10.11, and I would like to create a nodata area inside a multiband raster. What I have done so far is: Create a polygon on the area that I want to be nodata Clip with GDAL my ...
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  • 1
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32 views

How to calculate LST in ECOSTRESS data?

I have downloaded ECOSTRESS images, but the LST band values are way too high. How do I convert the pixel values to degrees celsius? Someone said they use the TES method to retrieve LST from the five ...
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