Questions tagged [band]
A layer in a raster dataset.
67
questions
2
votes
0answers
23 views
Querying / seting up PostGIS (raster) table to efficiently get all bands at once?
I have created a PostGIS raster table from raster2psql. I have use cases where I might have bands sizes of 114 to 670 bands inside a raster (The number is consistent across a given dataset.)
My ...
0
votes
0answers
38 views
BandOffsets.length is wrong!
I am trying to process large GeoTIFF images using GeoTIFF reader provided by Geotools library. However while processing the image getting below error:
org.geotools.data.DataSourceException: ...
1
vote
1answer
43 views
Batch changing of Raster Bands of Multiple Rasters in ArcGIS Desktop?
I have a ton of rasters in my ArcGIS project, each with 4 bands.
At the moment, I am changing the raster bands, one by one, for each file:
Red becomes Band 2
Green becomes Band 1
And I am setting ...
1
vote
1answer
20 views
Google Earth Engine band did not match any bands errord
According to the dataset, there should be a band named: total_precipitation_surface. However, when I try to get data from this band I get:
> Collection.first: Error in map(ID=2019061000F000): ...
1
vote
0answers
25 views
Earth Engine Image Collection Reduction Glitch
I am having a visual glitch when adding an image as a band to the map. The glitch consists of a vertical line which is not rendered at all. The more I zoom out of the map, the more this line increases ...
2
votes
1answer
31 views
QGIS 3.4 Modeler: Select a band of a raster layer for processing
As model input data I select a raster stack with three bands. The first processing tool just needs specific bands of this stack which I like to select in the input dialog.
I create a 'Raster Layer' ...
1
vote
1answer
239 views
Finding all the values within a band in google earth engine
I have an image composite which includes a day of year band. When I display the band using Map.addLayer and stretch by 100% in the Visualization Parameters I can see that the range of values is 151-...
0
votes
1answer
45 views
Exporting band data of a large number of points
I have a question regarding exporting a data from GEE.
I am new to coding and GEE. What I would like to achieve is export pixel band data of points a have managed to upload using Fusion Table.
Is is ...
2
votes
1answer
125 views
NDVI index based on QA bands for MCD43A4 , in GEE
I want to calculate the NDVI index based on the MODIS/006/MCD43A4 collection and based on quality bands, but as a new GEE user I have no idea If I am on the rght way to do this.
So far I have the ...
0
votes
0answers
55 views
Rasterise shapefile as 1 band (grayscale)
My code converts shapefiles to rasters.
I had first done this in colour, but now I need greyscale (1 band).
The code seems to create this for the first raster file, but the other raster files seem ...
0
votes
0answers
47 views
How to remove unnecessary bands from .sid file (keeping file format)
An ImageMosaic layer created from .sid data containing 5 bands has black areas where data is missing and setting transparency parameter in GeoServer does not help as error appears:
Error rendering ...
0
votes
1answer
35 views
Map.addLayer automation
As in the Hillshade Example, I wanted to automate adding all Layer from one Image for visual inspection.
var band_names =Image.bandNames()
print(ee.String(band_names.get(0)))
for (var i = 0; i < ...
0
votes
1answer
62 views
.bandnames() as String
var bandname = ee.String(ee.ImageCollection.first().bandNames())
gets a print of:
using
ee.Image.regexpRename(bandname, new_name)
or using
var bandname = ee.String(bandname)
results in :
...
1
vote
1answer
458 views
Google Earth Engine, get a List of Bands
I want to Automate Band selection for all bands. Therefore a List of the Bands is needed. This didn´t work:
ee.List(image.get('bands'))
1
vote
1answer
304 views
Count pixels of different bands in MODIS
I need some help with my script in GEE. I’m working with a MODIS Terra Vegetation Continuous Fields Yearly (MOD44B.051 Terra Vegetation Continuous Fields Yearly Global 250m) and I’m trying to obtain ...
0
votes
2answers
150 views
NDVI from ENVI to Arcmap stretched value
I calculated NDVI in ENVI by band math. When I drag and drop the image in ArcMap it becomes a black image with stretched value =0 for all pixels. However, by identity clicking each pixel has a value ...
2
votes
2answers
383 views
Are Landsat 8 data from ESPA corrected and calibrated?
I am trying to figure out Landsat 8 data corrections and calibrations. Actually, I don't really know how this can be done and which data needs what kind of correction and calibration for further ...
0
votes
0answers
336 views
Landsat 8 bands of 432 looks too dark in ArcGIS
I have created a composite map using the combination of Landsat 8 bands of 4, 3 and 2 (I read this combination gives true natural color) to see the scene in true color in ArcGIS, but it looks too dark....
3
votes
1answer
186 views
GeoTools extract band
I have a tiff image with 4 bands (Red, Green, Blue and Infrared) and I need to extract two of them.
I want to input one image and split it and make two images.
I want to do it with GeoTools since I ...
0
votes
2answers
153 views
band name for landsat surface reflectance product
I'm looking for any link/documentation where the centre wavelengths of Landsat surface reflectance product are stated/written (i.e. the value for each centre band). Specifically, I wanted to be sure ...
1
vote
0answers
145 views
Difference in the maximum values of a Raster band when using numpy array and when using gdal function directly
import numpy as np
from gdalconst import*
band = 'band1.tif'
band1_12 = dataset1_12.GetRasterBand(1)
max = band1_12.GetMaximum()
print(max) #this gives 2425.0
data1 = np.array(band1_12.ReadAsArray())...
6
votes
2answers
478 views
Why is a normalized parameter involving the Green band and Red band not used for Vegetation determination?
The green region reflects solar energy sufficiently well. So does the NIR region, much more than the green region, indeed. However, reflection in Green region is based on the chlorophyll concentration,...
1
vote
1answer
148 views
Batch Processing single band raster to create multi spectral images using arcpy.CompositeBands_management?
I am kind of new to python but I am trying to batch process single band raster images to create multispectral imageries using arcpy Composite Bands. I have 24 single band rasters (Bands 1 - 3 ) all ...
6
votes
1answer
886 views
Viewing bands of landsat 8 images in QGIS for NDVI calculation?
I am trying to calculate NDVI values for sites I sampled with landsat 8 imagery.
The equation is simple : NDVI = (NIR band - Red band)/(NIR band + Red Band)
Now I understand that landsat 8 images ...
2
votes
1answer
1k views
How to use GDAL translate tool in python script QGIS
I'm trying to use gdal_translate tool in a python script I'm writing in QGIS 2.18.3. I use the translate tool because I want to change all the zero values (in all 8 bands of my raster) to nodata. I'm ...
1
vote
0answers
342 views
Processing multi-band raster in qgis using python script? [closed]
Is there a way to process (for example by using raster calculator or r.null) a multi-band raster?
When I try to use raster calculator in QGIS 2.18.3 on multi-band raster the output is a raster that ...
1
vote
1answer
303 views
How to know Band overview resolutions available using gdal [closed]
I want to know bands resolution. Is there any way using GDAL that we can see the resolution of bands?
1
vote
1answer
432 views
gdalwarp causes ERROR 6: PNG driver doesn't support 6 bands in gdal2tiles
I've a problem with my gdalwarp function.
What I've done:
I built a .vrt file from 6 .tif images:
gdalbuildvrt -overwrite /input/base.vrt /home/tiles/BASE/*.tif
My gdalinfo looks like that:
...
4
votes
2answers
320 views
How to reduce number of raster bands of a RGB picture?
For my Master Thesis in Ecology I want to calculate an NDVI Index.
The tricky part is, that I don't have sattelite pictures with bands and so on, but RGB pictures. The pictures where taken with a ...
2
votes
0answers
238 views
Any way to make QGIS display band names of a stack properly?
I'm working with several layer stacks that have 100+ bands in QGIS.
The stacks are ENVI files, all band names are properly stored in the headers. Unfortunately, QGIS will not diplay them when choosing ...
1
vote
1answer
639 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
1answer
110 views
How to save symbology for raster and also its associated 'value' (using unique values)?
I have a raster in ArcMap (built using sum function in cell statistics), and only want to show the water parts of it (band 128). In doing so I only need to show multiples of 128, however there are ...
1
vote
0answers
435 views
How do I make a ratio image on Erdas Imagine 2014?
I have a stacked image but want to divide bands 4/5/. I have built a model on the model maker but the resulting image is completely black after running the model. When I open the attributes table the ...
17
votes
1answer
26k views
How to make band composite image in QGIS
I am wondering how I can make a band composite from three large bands files from Landsat? I was using option Raster>Miscellaneous>Merge but when I try to do it it crashes.
1
vote
2answers
157 views
Modis MOD11A1 band math expression
I am trying to calculate the temperature of MOD11A1 and I can't find the expression of band math. How the expression temp < 273 could be written at band math?
1
vote
1answer
493 views
How to prevent RGB composite flatten to 1 band after raster calculation
I have a series of landsat wanting to process in raster calculator, but after doing the tool it happened these output images only contain one single band. They used to be RGB 3-band images.
It is on ...
4
votes
0answers
1k views
Reading GRIB band metadata with GDAL
I'm trying to use GDAL in python to get only the temperature band from this GRIB file that has 2 bands. I can't just do temp_band = ds.GetRasterBand(1) because sometimes, but not always, the grib ...
3
votes
3answers
1k views
Unstack band layers from raster
I have stacked layer (from ERDAS) of Landsat 1-5 and 7, bands. I want each of the bands in a separate layer. How can I do that?
0
votes
1answer
262 views
How to extracting values of 40 plots from different bands of raster image in R?
I have 40 plots(samples) and I want to extract corresponding values from different bands of RapidEye image. So at the end I want to have totally 200 values of 5 bands in the format of txt.
Till now I ...
4
votes
1answer
948 views
Importing TIF raster in QGIS, default color band
Where can I change the default color bands for importing raster images?
When I import a TIF image the green color band is not set causing a purplish image.
When I set it in the properties it views ...
1
vote
2answers
814 views
Splitting picture taken with regular digital camera into real spectral RGB channels?
I have no idea how the sensors inside a camera work. I know I can take jpeg and separate the R, G and B channels but I have no idea whether these channels are the real red, blue and green in visible ...
0
votes
1answer
466 views
Using Python function in ArcPy script?
I have an script to transform DN into Reflectance of each band of several images.
The unique variable of the equation, apart of the Band itself, is the Divisor:
(B1 - 1) / 508
(B2 - 1) / 254
(B3 - ...
2
votes
2answers
573 views
How to change band type?
I have an hillshade tiff for which the current band type=Bytemay be problematic.
How to change the band type to type=float ?
2
votes
0answers
486 views
Python Script to iterate numerous, single-band rasters for arcpy.CompositeBands [closed]
I have a large collection of single-band geotiffs (NIR, Green, and Red) that I would like to composite using a Python script. The goal is to iterate through multiple folders in a main directory, ...
1
vote
0answers
351 views
Best band ratios in Aster data?
I am interested in the determination of lithology by using ASTER band ratio. I try to a lot of band ratio (for example RGB 4/8, 4/2, 8/9) but I didn't get a good result. Do you think what is the best ...
0
votes
2answers
6k views
Reading and writing tiff image and locate pixels and bands of images in R? [closed]
I am new in R.
I want to know how to read and write tiff format image in R and how to use R to locate pixels and bands of images
My environment is in Windows
when I try to read tiff image
it shows
...
2
votes
4answers
499 views
PostGIS raster maximum number of bands?
Is there a limit on the maximum number of bands you can store in a postgis raster?
I cannot find documentation on this. As far as I can remember, a geotiff allows up to the max short integer (so ...
1
vote
1answer
156 views
Band Issues in Quickbird Satellite data
I procure data from DigitalGlobe (Quickbird Satellite data) for different periods hence data having some different band combination. I have attached an example image to show the problem.
I am looking ...
2
votes
0answers
5k views
Python Band.SetNoDataValue(), sets all bands at once
Can someone tell me what I am doing wrong? I want to set bands 1 and three to 255, and band 2 to 0. The code below only should only set band 2, but gdalinfo shows that all bands get set to 0. Ubuntu ...
0
votes
1answer
111 views
How to get MODIS data with 3 band and step to change hdf file to colored map?
I just convert hdf file to tiff with MRT but my result is grayscale map. How to get MODIS data with 3 band and step to change hdf file to colored map?
