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Geographic Information Systems

Questions tagged [stack]

stack in this context is intended for questions relating to the stacking of rasters, it is not intended for questions relating to a GIS software stack

58 questions
info Newest Frequent Votes Active Unanswered
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1answer
42 views

Looping a raster stack with a step, R

I have a large raster stack of about 500 rasterlayers. What I want to do is to extract specific layers and store them in a different strack. The layers for which I am interested in, have a step of 8 ...
0
votes
1answer
48 views

Using raster stack function time in R?

I successfully ran a function over a smaller test raster stack (48 layers) in about 30 minutes but cannot run it over my large stack (1462 layers). The last one I tried over the large stack ran from ...
0
votes
1answer
17 views

Plot a series of subsetted pixels from a raster stack in R

I have created two raster stacks and would like to plot a row or column of pixels through the stack, but am not sure how to approach this. I know I can subset by layer, but how do I subset ...
0
votes
2answers
38 views

Why does the Extent of NIR Band 8 Landsat image not match other bands, even when cropping to a specified extent?

I'm trying to load and then stack four bands 2,3,4 and 8 RGB and NIR from Landsat images. I have downloaded and extracted them and they are in .tif format. # loading the bands B2 <- raster("./...
0
votes
2answers
48 views

Raster operations in a raster list in R

I have a raster list (21 in total) S1 that have the same projection, resolution but not exactly the same extent. Due to this difference, I cannot stack them without solving the extent/dimensions ...
0
votes
1answer
668 views

Import multi-band TIFF in R

I am trying to import a TIFF file that contains 2 bands. When using the following code in R, it seems only the first band is being recognised. S1<-"my/path/" S1<-list.files(S1, full.names = ...
0
votes
0answers
67 views

Convert raster list to raster stack in Python

I have a folder (with subfolders) containing different raster files (Sentinel-2 images). I want to import all the bands to python and creater a raster stack to allow further processing (...
0
votes
0answers
62 views

What is the difference between a raster moasic and a raster stack?

I'm trying to figure out the most useful way to store and process some MODIS Vegetation Index data (MOD13Q1). Currently, I have many .hdf files that cover the same spatial area over 18 years. I plan ...
1
vote
0answers
38 views

How to save statistical parameters of a raster stack in a csv using R

I have a reference raster and a stack of other rasters. I wanted to perform Mean, Std Dev and Bias of the reference with respect to the remaining. So I calculated the Cell Stats of all but when I try ...
4
votes
0answers
112 views

Stacking and masking Landsat at the same time with rasterio

Based on answers from previous questions 1,2 and the Masking a raster using a shapefile guide from rasterio cookbook, I wrote the code below. The code runs correctly. I would like to improve it. 1- ...
0
votes
1answer
299 views

Add bands' name and description to the Metadata when stacking using rasterio

I'm using this code, of @Loïc Dutrieux, to stack 8 Landsat bands. with rasterio.open(final_list[0]) as src0: meta = src0.meta with rasterio.open('stack.tif', 'w', **meta) as dst: for id, layer ...
0
votes
0answers
75 views

Stack multiple Landsat images

I would like to stack around 700 Landsat images in specific format as input to YATSM Continuous change detection and classification (CCDC) algorithm. I try to use this bash script 4_stack_TIFF.sh. In ...
0
votes
2answers
89 views

Selecting layers of a raster stack using a sliding windows as a step in R in for loop

I would like to create a loop that every time selects the first ten layers of a raster stack, calculates their mean and saves it to a layer of a new raster stack. Also, I would like to have a step ...
0
votes
0answers
194 views

Google Earth Engine: Stack an ImageCollection

Does anyone know how can I stack all this collection? I made my own collection from January Landsat images (L7 and L5) and I would like to stack all the images to check which are the areas with more ...
3
votes
1answer
888 views

Raster calculation loop - R

I have a raster stack of 108 elements The stack 'images' is created using 4 bands (RGB+NIR) of 27 satellite images. The sequence of the rasters in the stack is: Position [[1]]: blue band image 1 ...
6
votes
1answer
2k views

How to stack bands in Google Earth Engine?

I have created an Image collection in GEE and with the help of a function I have computed NDVI index and mapped it to create another collection with NDVI as a band. Now I want the create a stacked ...
2
votes
3answers
2k views

Stack rasters with different origin, dimensions and resolution in R

I have three raster files with the same extent and CRS, but with different origin, dimensions and resolution. r1 class : RasterLayer dimensions : 3020, 3043, 9189860 (nrow, ncol, ncell) ...
4
votes
1answer
360 views

How to create raster stack from names on R

I have a dataframe containing the best predictors by their contribution to a model: bestpredictors var contrib 2 Pfallwinter 8.1141 15 Tofall 58.0000 23 ai 5.3573 26 ...
1
vote
0answers
201 views

Is it possible to list SpatialGridDataFrame files to be used in a loop?

I have a lot (>50) of SpatialGridDataFrame files that I need to turn into raster files, stack with a set of raster files I already have and then extract data from random points from each layer of all ...
4
votes
2answers
2k views

Mean by month on R stacked raster

I work with MODIS NDVI rasters in 2016. I have 23 rasters stacked in one object. I have 2 raster by month. I would like the average by months and conserve a raster for each month. ndvi.stack <- ...
1
vote
1answer
996 views

R Stack. Extent and CRS

I'm new on R. I was listing .tif files from a folder to R. My final product is going to be a value mean of all the files in only one image. So I start stacking all of them, then brick the stack, and ...
1
vote
0answers
67 views

Stacking/Aligning High-Res UAV Mosaics from Different Dates in QGIS?

I have two mosaics taken in different band sets respectively, on two different flights- of a crop field. The flights were taken a day apart, so the vegetation cover has not changed. The only issue is ...
2
votes
2answers
4k views

Handling multiple-extent-problem to create raster stack in R?

I am storing ~ 30 raster files in a folder and want to create a raster stack. I know that not all of these rasters have completely the same extent. They do have the same resolution and CRS. Thus I ...
4
votes
1answer
825 views

R package gapfill: How to convert R raster stack to 4-dimensional array and then back to raster stack?

I'm currently analyzing MODIS EVI time series (MOD13Q1) for a small region between 2000 and 2015. Now, I would like to fill missing values using the new R package gapfill. What I have done so far: ...
0
votes
1answer
86 views

Matching extent (samples & lines) to get multi-temporal stack

I downloaded several Landsat scenes (4x3) to create some multi-temporal stacks to see the phenological difference in April/March - mid summer - autumn. I actually use The EnMap Box which has been ...
1
vote
0answers
104 views

Determining Highest Position in QGIS for raster stacks with 10+ images?

I want to follow up on this question from last year Emulating ArcGIS Highest Position tool in QGIS? Here the question is if QGIS has a tool like the "highest position" tool in ArcGIS, where, in a ...
0
votes
1answer
217 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 ...
0
votes
1answer
56 views

Receiving higher values than should be possible in stackApply SUM for Frequency calculation in R

I am currently working on creating a frequency raster for a country based on multiple Rasters of the same day through following years and where the previous values are reclassified to 1's and 0's. The ...
3
votes
2answers
2k views

How to remove the Na values from a stack of rasters?

In R I have a stack (nsw.stack) which contains 6 variables. I have clipped the extent. However, When I look at the summary it appears that there is a lot of NA values (see below). I think this is ...
1
vote
2answers
159 views

How to convert a raster output in a stack in R into ArcGIS

I am modelling the response of a bird (skylark) to various climatic and topographical variables in the program R. Using the predict function I predicted the abundance per pixel (see below for code). I ...
0
votes
1answer
51 views

filter a raster stack in Arcgis

i'm trying to run "Filter" operation using AcGIS on a stack layer of 331 bands. However, the result is always a raster of only one band. How can i get operation to be done on the whole stack?
1
vote
0answers
195 views

Raster package limitations

I am very new to R and to raster package and I was hoping that someone could provide some guidance. I am trying to run a function that averages a series of rasters, 300 to be exact, they are in geotif ...
2
votes
0answers
119 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 ...
1
vote
1answer
142 views

Matching Decedal Average NDVI and Worldclim Data

Ive never used NDVI (or EVI) datasets in R. Does anyone have any resource I could use to access a decadal average NDVI dataset for the globe. It would be preferable if this dataset was also comparable ...
3
votes
2answers
2k views

Extract raster layer data by attributes in RasterStacks R

I have a RasterStack with 2 raster layers of the same area, one from a SpatialPolygonsDataFrame (layer1) and another NDVI satellite image (NDVI). layer1 has a series of polygons, each with various ...
8
votes
1answer
310 views

Stacking Vector Layers in TileStache

I am serving several vector tile layers of different geometries (point, line & polygon) in TileStache using VecTiles:Provider, with this cfgfile: { "cache": { "name": "DISK", "path":"...
2
votes
1answer
66 views

How to determine the appropriate size of a 3 dimesional raster block/chunk

I am processing large MODIS time series (12 years) dataset with an array dimension of 4800 x 4800 with a data type of Int16-Sixteen bit signed integer. I want to build a 3 dimensional array (row,col,...
3
votes
1answer
2k views

R: extract values from raster stack and aggregate results

I'd like to extract values from a rasterstack, cell by cell, and create a list of the values: ext <- extent(0,100,0,100) r1 <- raster(nrows=100, ncols=100,ext) r1[] <- sample(seq(from = 1, ...
1
vote
1answer
3k views

stack rasters with different extent and resolution in a loop with R package raster

I would like to stack rasters with the R package "raster". Layers are in ascii format. I want to crop them to have the same extent and project them to have the same resolution. My code gives raster ...
1
vote
1answer
143 views

stack 10 modis ndvi geotiffs and scale them by 0.0001

I have 10 geotiffs Modis ndvi named 2005.tif ... 2014.tif I want to stack them all and create timeseries. i know how to do that, but the stacked images still need scaling by 0.0001. how can i bulk ...
4
votes
1answer
331 views

Where are the “band names” of an ENVI file once it is imported in R?

I have a .dat file (ENVI format) with specific band names, as you can see in the snapshot. I've imported this file in R, but I cannot find the band names in the R object. The command names(...
3
votes
3answers
872 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?
2
votes
0answers
336 views

R raster stack 4 dimensions

I am trying to create a raster stack / brick from a list of ncdf files with the dimensions 160x160x24x1). r = stack(files) This gives me a raster stack but without the 4th dimensions which is ...
1
vote
0answers
325 views

gdal_merge shifts rasters after processing, layer stack is slightly off

I have experienced that gdal shifts rasters. The outputs of gdal_warp are often skewed, have different pixel sizes and so forth. A known error which has also been discussed here. But now, I had to ...
0
votes
0answers
119 views

Calculating maximum mean temperature of the coldest month with a lists of rasters

I need calculate the maximum mean temperature of the coldest month. I need first select the coldest month in a list and then in this month determine the maximum temperature. I do this: Create the ...
2
votes
1answer
550 views

Calculating quantile values over a stack of images with grass gis. Help needed on r.series

I need to calculate the values for the 25%, 50%, 75% and 90% quantile over a series of rasters (time series of ndvi values from landsat). I am exploring the r.series command in Grass GIS, but the ...
3
votes
0answers
466 views

How to calculate 90% confidence interval in a raster stack

I have a stack of grid files (23) in ASC format from a MODIS sensor and I need to calculate a 90% confidence interval, mean, min, etc, for each one in R, how can I do that? specially the interval. #...
0
votes
2answers
2k views

R -plot 12 images per plot or save 12 images per image file in R

Here is R script and my question is How can I plot 12 images per plot or save 12 images per image file because I have total 864 images. RAD1998 <- raster(paste(getwd(), "/1998bil /...
2
votes
1answer
2k views

Stacking overlapping rasters, keeping cell values on top?

I have a land cover classification that consists of three files. One file is the LCC for the western half of my study area, another covers the eastern half (these two overlap in the middle), and the ...
1
vote
1answer
364 views

Running Erdas command in MS-DOS

I have generated the following command line in ERDAS, and want to run it in MS-DOS. Getting an error- "system cannot find the path specified". I have checked the path by opening it in windows ...

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