Questions tagged [composite]

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418 views

Create false color images on Earth Engine

I want to calculate some band ratio images on e.g. Aster imagary and display them as false color image. For example I compute band ratio images on Aster as follow: var BR1 = AsterImageMosaic.select('...
2 votes
2 answers
377 views

Maximum Likelihhod Classification - Error 010108 and Error 010067

I'm trying to run a supervised classification on a Landsat8 multi-band raster in ArcMap. Every time I run the classification, it returns Error 010108 and Error 010067. The 010108 error says The number ...
1 vote
1 answer
271 views

Exporting MODIS AOD monthly(mean) composite for 5 years

I am writing a code in Google Earth Engine, in which I want to export the image composite of mean monthly MODIS AOD for 5 years. I am writing the following code, but whenever I try to run it the ...
5 votes
1 answer
534 views

Improve washed out blurry composite Landsat 8 image in QGIS

I want to create a composite image using Landsat 8 bands. I followed the steps to do so (creation of virtual layer, high resolution, separate) and adjusted the bands' colors (red 4; green 3; blue 2) ...
0 votes
0 answers
40 views

True Colour Composite image is Red. I have used sentinel2 images

I am trying to do Land Use Land Cover Analysis on QGIS using sentinel-2, however when I try to do composite band with band 4,3,2, the image is predominantly red and nowhere close the what it should be....
2 votes
2 answers
112 views

Compile 4 bands in separate images QGIS

I'm struggling with a multispectral drone imagery composition in QGIS. Each drone's camera shot creates 5 images: RGB (don't caring right now), NIR, green, red edge and red. I need to do a composite ...
0 votes
1 answer
24 views

Filter out blue patches in greenest pixel composite - GEE Quality Mosaic NDVI change image Sentinel-2

I am making greenest pixel composites from Sentinel-2 SR (using the quality mosaic tool in GEE based on NDVI). I then subtract two greenest pixel composites to get a change in NDVI image. These blue ...
0 votes
1 answer
151 views

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 ...
0 votes
0 answers
51 views

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 ...
0 votes
0 answers
81 views

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 ...
0 votes
0 answers
24 views

NDVI from Composite Band using ArcMap [duplicate]

I am using ArcMap. I created a composite band for each 5-year using band i.e.,2,3,4,5,6,7,8. I then calculated NDVI index and created NDVI map for each 5 years. I now wanted to create NDVI map of 5 ...
0 votes
0 answers
117 views

Maximum NDVI greenest pixel composites to create cloud free Landsat 8 images

I am utilizing maximum NDVI to get the greenest pixel of Landsat 8 data to create cloud free composites in the Google Earth Engine. I found this GEE tutorial which is using Landsat 8 Top of Atmosphere ...
0 votes
0 answers
69 views

ArcGIS Desktop Composite Bands Tool is changing my band names

I have a Sentinel 2a raster that I'm trying to do a false colour composite for. The problem is that when I composite the bands, the output seems to have different bands. By deafult, the output has RGB ...
1 vote
0 answers
107 views

Sentinel 3 image offset

I am working with Sentinel 3 Data to create monthly composites (LST, NDVI, NDII). I noticed an offset on a few composites (5 out of 32, or all 3 combined: 15 out of 96) (this becomes recognisable e.g. ...
1 vote
0 answers
224 views

GEE Temporal Gap Filling - Fill Landsat 7 cloud masked pixels to produce one image

Really new to GEE but trying to learn during my PhD... I am trying to fill the gaps created from cloud masking the Landsat 7 imagery I have. I have filtered by the study area (geometry), the cloud ...
0 votes
1 answer
84 views

Problem with s2cloudless and median. Image with only 1 pixel!

I found a problem when using s2cloudless mask, trying to make the composite and then clip it with a polygon. I've found this thread explaining how to use s2cloudless: Displaying the cloud free ...
0 votes
1 answer
382 views

Extract By Mask Tool is changing my composite raster bands

I wanted to extract an area (as set by a polygon) from a composite band raster using the Extract by Mask tool. Once I've done it, I've changed the RGB symbology to the correct bands specified by ...
2 votes
0 answers
199 views

Remove scene edge pixel error in annual composites in GEE

The median reducer over the cloud masked image collection is unable to remove the edge pixel error at a few scenes. Although the cloudmasking function has the code to remove such edge pixels not ...
0 votes
2 answers
450 views

What's correct order of resampling, reprojecting and composing ImageCollection in GEE?

I want to resample, reproject and compose an image collection in python using the GEE API. My script now is this adm0 = ee.FeatureCollection("FAO/GAUL/2015/level0"); filter = ee.Filter....
2 votes
1 answer
1k views

How can I create a mean or maximum value composite raster from a set multiple rasters in QGIS?

I know of Build Virtual Raster and Merge methods which combine a set of rasters into a single raster. However, I do not know if the resultant raster is a mean or max or any other composite type. I ...
4 votes
2 answers
609 views

How to extract periods in collections in GEE?

I have the following code where I calculate the greenest pixel composite for the months 5-9 from Landsat 7. var geometry = /* color: #d63000 */ /* shown: false */ ee.Geometry.Polygon( ...
1 vote
1 answer
351 views

Landsat Temporal Composite overlapping paths very different pixel values Google Earth Engine

I use GEE to create temporal composites from Landsat imagery (right now using Landsat 8 Collection 2, but same issue with Collection 1 or Landsat 7) for a particular island. I noticed that parts of my ...
1 vote
1 answer
881 views

Merging Landsat 4, 5, and 7 Data for Simple Composite

I'm attempting to merge Landsat 4, Landsat 5, and Landsat 7 imagery into a single image collection in Google Earth Engine, in hopes of running simpleComposite() on the entire collection. var geo = ee....
2 votes
0 answers
50 views

Why are these Landsat composite exports vastly different sizes from GEE when they shouldn't be?

I'm trying to export annual composites of Landsat data in Google Earth Engine of two regions of interest (below ) var LakeRegion = /* color: #98ff00 */ee.Geometry.Polygon( [[[-81....
-1 votes
2 answers
206 views

Creating composite band image with Sentinel 2 data using ArcPy

As we know sentinel satellite data have many sub folder. I want to create composite band of each datasets with the band 2, band 3, band 4, band 8 which are located in one folder(10m) and band 11, band ...
3 votes
1 answer
122 views

How can I create a 10 day composite image of the snow cover extent using QGIS?

I have 10 singleband rasters of the snow cover extent (1 raster/day from 1st of December to 10th of December). I have to create a composite image that merges all of them. I tried the r.composite tool ...
1 vote
0 answers
78 views

How to speed up a complex process of compositing multispectral images in python?

I would like to speed up my process. I have a one month time series which consists of 5 images (Sentinel-2) taken over several days. Each image is made up of the same bands that I selected. After ...
-1 votes
1 answer
491 views

Creating composite band image form multiple Sentinel 2 raster data using ArcPy

I have multiple Sentinel 2a raster images in separated folders at same location, which means every image is in separate folder. Now I want to create composite band of each raster. I have written a ...
3 votes
1 answer
2k views

Merging raw data from Landsat 5, Landsat 7 and Landsat 8

This question concerns the merging of the following Google Earth Engine collections: USGS Landsat 5 TM Collection 1 Tier 1 Raw Scenes (LANDSAT/LT05/C01/T1) USGS Landsat 7 Collection 1 Tier 1 Raw ...
2 votes
1 answer
486 views

Prevent loss of timestamp when mapping over image collection

I am using the below code (taken from this post) to make monthly composites of cloud masked S2 data but the reduce.median won't work because my ImageCollection doesn't have a timestamp. Does anyone ...
2 votes
1 answer
1k views

Count connected pixels (GEE)

I am working on a code to detect/count the patches of burned areas in an image. I thought using the function connectedPixelCount() in GEE would help me in doing so. However, the latter seems to not ...
0 votes
1 answer
222 views

Calculate weight using distance from point for Weighted Reductions in Earth engine

I want to calculate the total yearly NO2 emission from the power plants by using Sentinel-5p NO2 data. First I defined my aoi and sum all 365 images into one image using ee.Reducer.sum(). After that ...
5 votes
3 answers
3k views

Loop in ModelBuilder for compositing bands of multiple Images

I'm attempting to automate the "Composite Bands" tool somehow in ModelBuilder, but haven't been able to figure out an effective method. I have landsat 7 data that is separated into folders and each ...
25 votes
1 answer
52k 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.
0 votes
0 answers
176 views

MODIS LST maximum value composite

I am using eight day composite MODIS LST data MOD11A2. How do I make a monthly composite from four 8-day composite data taking the maximum value out of four in the output raster? Initially I went for ...
0 votes
1 answer
323 views

R: Annual composite based on the median: How to get the index of the original layer for each pixel?

What I want: I have a list of rasterstacks which are timeseries (300+ layers) for different bands. The timeseries are irregular, and therefore I want to create annual composites based on median ndvi. ...
1 vote
1 answer
2k views

GEE unsupervised classification (clustering) of Landsat 8 cloud free composite - User memory limit exceeded

Can anyone explain why I am getting the memory limit error when trying to classify using the wekaKMeans algorithm over a cloud-free composite of Bangladesh? I'm trying to differentiate mangrove pixels....
0 votes
0 answers
117 views

How to find Dryest Pixel of an ImageCollection in Google Earth Engine? (Dryest pixel composite)

I want to create a composite with the dryes pixels of an ImageCollection. I know how to make a greenest pixel composite, but I have no clue how to make a dryest pixel composite. Is there a function ...
2 votes
1 answer
1k views

Google Earth Engine. Looking for a way to have information for each location in the mentioned time period based on the non-cloudy layers

I am trying to work with landsat5 in Google Earth Engine and get some information for a list of locations (I have long/lat of the locations and their postal codes in a Fusion Table). I am looking ...
-1 votes
1 answer
61 views

How to ensure that a composite locator respects the settings of the component locators?

This question is asked and answered for the benefit of anyone else who may struggle with this specific scenario. Background: Two existing locators, each configured to write a Reference ID for ...
4 votes
0 answers
24 views

Replacing polygon within composite relationship without deleting tabular record? [duplicate]

I have a geodatabase that contains a table, a point feature class, and a polygon feature class. Each record in the table has both a related point and a related polygon, so all one-to-one ...
2 votes
0 answers
637 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, ...
12 votes
1 answer
1k views

QGIS composer add attribute table with repeating columns

I need some help with QGIS print composer. I use the atlas composer and I try to use add attribute table from layout tab. I have create my expression where I want to print in composer. field ...
4 votes
2 answers
809 views

Using Landsat 5 TM 8-Day NDVI Composite?

I'm working in a project where I need the NDVI for some areas from Uruguay for the period 1988-1993, and I found this product "Landsat 5 TM 8-Day NDVI Composite" but I'm not sure of how it was ...
5 votes
1 answer
2k views

IR as 4th band in RGB composite (ArcGIS)

In Symbology tab of a raster in ArcMap, in the section of Pan-sharpening, there is an extra option to check at the bottom: "4th-band Infrared Image" along with its weight: I guess I have to add a ...
1 vote
1 answer
312 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 ...
8 votes
2 answers
2k views

How do MODIS products naming conventions work?

If I have the product MOD13Q1.A2014001, does it represent the previous 16 or the 16 days after January 1st? I.e., the product is made with 16 days, but how to determine if it was taken the previous ...
1 vote
1 answer
293 views

How does i.fusion.brovey in Grass 6.4.3 work?

I'm using Grass 6.4.3 in Linuxmint 16. I don't have a very big problem but I'm trying to understand what is Grass doing, if I'm applying the process correctly and if there is something wrong with my ...
3 votes
1 answer
691 views

Merge and export two layers that utilize blending modes

I have spent more time than I can to admit trying to come up with a solution that doesn't require bringing the layers into Photoshop or the GIMP (which would take an insane amount of RAM/swap space to ...
2 votes
1 answer
474 views

Landsat 8 composite image using different resolutions?

I have created a composite image of Landsat 8 using bands 2 to 7 (blue, green, red, NIR and SWIR) using ArcGIS 10.1. For bands 2-4, I've pansharpened them to 15m spatial resolutions using the ...