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

learn more… | top users | synonyms

0
votes
1answer
15 views

How to use gdal_calc.py for multi-band images?

My problem is that I have multi-band images (8 bands) in GEOTIFF format and I tried to use gdal_calc.py to calculate a conditional expression between those bands. However, I could not make it because ...
1
vote
0answers
20 views

SPOT 1 HRV Atmospheric correction in GRASS GIS 7 returns NULL values

I'm having trouble using i.atcorr in GRASS 7. I am using 3-band SPOT 1 HRV image (Green, Red, NIR bands). Performed the i.atcorr for each band using the 6S parameters below (last parameter changed ...
0
votes
1answer
13 views

Get GDAL to convert all four bands to a VRT from a NITF?

So I have a series of four band NITF images (RGB + Near Infrared). I am currently storing them in a VRT with gdal_translate. Unfortunately, gdal_translate keeps interperting the fourth band as an ...
0
votes
1answer
26 views

raster sytling multiband rendering 0=nodata

Is there any way to set the pixel value 0 to nodata of a raster stack in the multiband rendering type in QGIS? I remember that it is possible to check a box in arcgis for that, so maybe i just ...
-1
votes
2answers
50 views

What is the index formula to calculate water stress index using multispectral sensor (Red, Blue, Green, Red edge, NIR)?

I am having a multispectral sensor with Red band, Blue band, Green band, Red-edge band and Near-Infrared band. I need to find water stress using these bands, is it possible to find and if yes what ...
2
votes
2answers
48 views

Using multiband images in ArcGIS Raster Calculator? [duplicate]

I have 5-band composite orthomosaics that I wish to apply multiple vegetation indices towards. In the raster calculator, it only displays the raster, but not the individual bands. Can someone give me ...
0
votes
0answers
19 views

What units are associated with these raster bands?

The picture is a scatterplot of roughly 400 pixel values from 4 different raster bands. Im curious what the units are? They do not correspond with the sensor's band values. Sensor is WV-II. 1 - Red ...
1
vote
0answers
14 views

Find densest point in satellite agriculture map [closed]

I have a .tiff image file with 3 bands. I want to write a program, (python opencv?), that will find the first N densest points in the region. Densest, meaning the point with the most of its own ...
0
votes
0answers
22 views

Getting Color Infrared from NAIP WMS Server on QGIS

I'm having a terrible time getting color infrared imagery from an NAIP WMS Server with QGIS 2.14.3. I use the "Add WMS/WMTS Layer" button, add a new server with the URL from the WMS link on ArcGIS ...
0
votes
1answer
30 views

Comparability of Landsats

I have collected data (spectral bands) from Landsat 4-5 and Landsat 8. I was calculating NDVI when I noticed that the two Landsats have different band numbers designated as Red and Near Infra Red (...
1
vote
1answer
36 views

Bands disappear after Raster Calculation ArcGIS [duplicate]

I have a tif file containing 36 bands. After I applied raster calculation on the file the bands aggregate into one single band which I don't want because I need them for further calculation. People ...
1
vote
0answers
54 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 ...
0
votes
1answer
35 views

How can I use gdal_retile on RGBI (4 band) GeoTIFFs while preserving band information?

I want to retile large GeoTIFFs with 4 bands: R = Red, G = Green, B = Blue, NIR = Near Infra Read; in short "RGBI" if I understand correctly. gdalinfo on the input file prints as band information: ...
0
votes
0answers
20 views

Multi-band raster to multiple single band rasters for pixel value extraction [duplicate]

How would I go about separating a multi-band raster into 5 individual rasters? I have a raster with 5 band options when viewed as stretched. I'm trying to get the pixel values for each band so I can ...
0
votes
0answers
69 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 ...
3
votes
1answer
69 views

Extract All Pixel Values for each band in a Multi Band Raster

I have a few multi band rasters I'm working with, and I need to perform statistical analysis (in another program) on the data. My mentor told me to determine the value for each pixel in each band, and ...
1
vote
1answer
115 views

How to extract a 5 bands geotiff file into RGB file?

I have a five bands geotiff file for Red, Green, Blue, Red-edge and Infra-red, and want to use gdal_translate to extract bands Red, Green and Blue gdal_translate -b 1 -b 2 -b 3 -mask "none" "input....
1
vote
0answers
24 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-...
4
votes
0answers
39 views

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 ...
4
votes
0answers
54 views

Composite Bands (Data Management)

I am building a small multispectral camera based on the Raspberry Pi Compute Module and two Raspberry Pi cameras. One of the cameras has a NIR filter, the other is a normal RGB camera. When using the ...
1
vote
1answer
118 views

Pan-sharpening Landsat 8 with 5 bands

I use bands 654 for vegetation classification and bands 432 to prepare the map layout. Is there a way to pan-sharpen the landsat 8 image using the bands 65432 ? So I swicth the GRB to classify and to ...
1
vote
1answer
57 views

How can I clip a multiband raster and preserve the band names?

I have a Landsat 8 image which I clipped with a polygon shapefile. It works fine, but I'd like to preserve each band name in order to improve my workflow speed. The output raster saves each band as "...
1
vote
1answer
31 views

Raster turns into 4 separate rasters after clipping

I have a raster with a .sid extension. After I clip my raster, it produces 4 separate new rasters (3 of which are black and white). When I delete any of the Black and White rasters, the clipped ...
1
vote
1answer
333 views

How does ArcGIS calculate zonal statistics with multi-band rasters?

I am working back and forth between QGIS to ArcGIS for various tasks. So far, for my taks, I have found similar tools and options between them. However, for my current task, to calculate the zonal-...
0
votes
1answer
74 views

Conversion of multispectral image to grey scale

I have a composite with four bands NIR, Red, Green and Blue. I would like help on which weight values to use when converting it to a single band which will then be used to classify vegetation. I am ...
2
votes
1answer
336 views

Difference between a spectroradiometer and multispectral sensor

Let's take as an example of a spectroradiometer MODIS, and as an example of a multispectral sensor the Landsat8 (OLI). What is the difference between these two sensors? Should we compare a ...
3
votes
1answer
398 views

Is atmospheric correction necessary when working with multi-spectral indexes?

When you are working with Landsat Level 1 data and calculate indexes, e.g. NDVI, NDBI, SAVI ..., do you calculate them using raw data (pixel DN value), or atmospherically corrected data (surface ...
2
votes
2answers
280 views

NDVI from Landsat8 LandsatLook images

I have downloaded landsat image from this site and now Im wondering if i can get NDVI index from it. In raster calculator I have only 3 ranges, shouldnt be four? Or am I doing something wrong......
1
vote
1answer
139 views

Doing NDVI when nir data is given as 3 bands

I have been provided with two data sets of the same area, one with normal RGB bands and one with NIR data. My problem is that since the NIR data is given as 3 bands, i am not sure how I should ...
1
vote
1answer
247 views

IR/R could not detect when using landsat 8 in ERDAS 2014 Is there a alternative way around?

I'm using ERDAS 2014 and I upgraded from ERDAS 2013. I am doing a lot of band indices for various kinds of such as clay, ferrous, Mineral composite and so on.. from landsat 8. Using the indices in ...
0
votes
1answer
38 views

Use of OTB BandmathX

I have a couple of three-band satellite images that I want to apply an expression to and get a three-band output. The expression is of a simple form: output_pixel= (input_pixel*d^2)/cos e After ...
1
vote
0answers
78 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 ...
0
votes
1answer
260 views

True color combination using Resourcesat-1?

I am working with an image from India. According to the metadata, I am working with an image acquired by the AWiFS sensor from Resourcesat-1: <Name_of_the_Satellite>Resourcesat-1</...
0
votes
1answer
68 views

How to make sense of multi-band global radiation output raster from area solar radiation tool

So I'm running the area solar radiation tool using the time configuration and other parameters as seen here: By selecting the "Create outputs for each interval" checkbox, the global radiation ...
7
votes
4answers
1k views

Setting NoData for a multiband raster?

I have an RGB orthoimage that has black area instead of NoData, as pictured here: When I use the SetNull tool, it does remove the black area, however it then turns it into a grayscale orthoimage, ...
3
votes
2answers
81 views

Isolation and interpretation of vineyard multispectral data

I have 3 band multispectral raster imagery over a vineyard from which i have created a number of indices e.g. NDVI. The data is fairly high resolution (5cm/pixel) so shows a lot of along vine and ...
2
votes
1answer
1k views

how to generate NDVI with multi channel images?

I have a 6 channel proprietary camera and I need to create a NDVI map. I created a map from each band, so now I have 6 files each one on a different band width. How can I proceed now? I am using QGIS ...
4
votes
2answers
222 views

How to check for corrupted raster data?

I am working with thousands of tiled (2km x 2km) 4-band NAIP images. When I diced the images in Erdas, the program corrupted many of the tiles. The screenshot shows an example of one of the ...
1
vote
1answer
352 views

Why does the composite raster pixel values not cover the full range of RGB and what does this mean for reclassification after conversion to int?

I have about 30 or so composite rasters in IMG format that I need to 1.) Preserve the date that the raster was created and 2.) Combine all of them. My workflow is: Step 1: raster calculator, ...
3
votes
1answer
373 views

Zonal Statistics Tool on raster

I am working on a one-band raster with pixel values from 1 to 7, each representing a land-use class. I also have a grid of polygons and what I need is to obtain the percentage of each class in each ...
4
votes
1answer
592 views

Removing some bands or layers from a tiff using gdal

I have been working on a multiband raster image. It is a pix image. I need to just work on the 26 bands that are raster files and not the 4 bitmaps that are are also included in the pix image. I could ...
2
votes
2answers
211 views

spectral profile for multilayer/time series

I am missing a spectral profile in QGIS which enables me to see the values for all bands of a given pixel. (absolutely necessary for multispectral and multitemporal/time series work) It seems, there ...
1
vote
0answers
248 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 ...
3
votes
4answers
659 views

Spectral profile (z-profile) viewer for ArcGIS

I have multilayer raster with 6 bands. Is there a way to select one specific pixel and to display the z profile (the values of each band) for this pixel as a chart or table? I am looking for a tool ...
0
votes
0answers
87 views

Script to stack multiple landsat bands in different folders

I wanted to find out if there is a possible script I could use to stack landsat bands into a single image, and then apply that stack command to multiple folders (I have about 100 landsat scenes that ...
1
vote
1answer
849 views

Is there a way to write single bands raster from multi-band layer faster in r?

I have 1000 multi-layer rasters and have to export each separate layer to a tif. Some friends recommended R to do the job. I used the following code: library(raster) namesVector<- c("layer1", "...
0
votes
2answers
121 views

Rasterization in different bands

I have a set of vector based shape files, representing different types of ground coverage in a city (for ex: roads, buildings, open field,...). For the algorithm that I want to run on it, I need just ...
1
vote
1answer
547 views

How to add a DEM Band to an existing 3-band TIFF file using QGIS?

I'm quite new in the GIS business and I do not figure out how to do the following thing: I have two geoTIFF Files, one is a 3+1 bands file (RGB+alpha), the second one is a DEM geoTIFF file containing ...
1
vote
1answer
839 views

How to create a 4 band image from an RGB and a grey scale image?

I have an RGB image and a Gray scale image. I would like to merge them in a 4 bands image. How can I do that? Is there a simple way to do it from QGIS or I have to modify the image before to load them ...
2
votes
1answer
221 views

Display a raster stack with several bands in ArcGIS?

I have already made a raster stack (5 bands in one TIFF) of my multitemporal Landsat images in R and have also clipped a smaller region of every raster stack for each image. Now I want to do some ...