Questions tagged [modis]

Questions about data from the Moderate-Resolution Imaging Spectroradiometer sensors aboard the Terra and Aqua satellites.

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280 views

DOY chart in Google Earth Engine

With the following code I am trying to produce a NDVI graph with the days of the year on the x axis (based on this example, 2nd graph). var modisNDVI = ee.ImageCollection ('MODIS/MCD43A4_006_NDVI'); ...
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0answers
119 views

rescale MODIS NDVI value- fill value and background value after clip study area

I want to use MODIS NDVI time series to extract phenological parameters using TIMESAT software. I have question about data prepration, Is it alwaysd necessery to rescale NDVI data? valid range in ...
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1answer
378 views

LinearRegression with Google Earth Engine

I ve been doing simple linear regressions with GEE and I have found a possible error that I would like to share and in case that I am wrong, please let me know: Is it possible that when ...
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1answer
1k views

Select pixel values in a raster using R

I'm trying to select some cell values in a raster MODIS. Follow my problem: I have to filter these values to mask after it: 32767,32766,32765,32764,32763,32762,32761 I've used this code to one value:...
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1answer
304 views

MODIS data for entire Earth Surface with ModisDownload in R

I am trying to use the ModisDownload function from the rts package to download, mosaic and reproject NDVI data from MODIS for the entire Earth surface. I have successfully done that for a subset ...
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0answers
61 views

Data for atmospheric correction with 6s from Modis [closed]

I want to make an atmospheric correction with Py6S. So, I want to get ozone, water vapor, AOT from Modis - MYD08_D3. I got water vapor from dataset "Atmospheric_Water_Vapor_Mean". The average value ...
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0answers
145 views

Performing multiple regression of time series data using R? [closed]

I am working with MODIS time series data, and I want to stack a stack object to prepare my data for multiple regression. I have AMSR (soil moisture) as a response variable and I have some ...
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1answer
67 views

How can I export a Numpy array made from MODIS data for use in ArcMap?

I have an array made from MODIS Terra Daily snow data that I would like to export for use in ArcMap. How would I output the 'probablility_of_snow array' array near the bottom of this post to an image ...
2
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1answer
409 views

Merging two image collection into one with two bands (LST and NDVI )

I have created two image collections (monthly average) from different datasets, one is LST (MODIS MOD11A2 ) and the another one is NDVI (MODIS MOD13Q1). The two datasets have exactly the same date. ...
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1answer
790 views

Reclassifying NDWI using Google Earth Engine?

I'm trying to reclassify a NDWI raster into 1 for values >0.4 and 0 for <0.4. I understand that its possible to use .remap in case of discrete values, but not sure how to reclassify NDWI raster ...
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0answers
185 views

Reprojecting raster using QGIS?

I'm currently working on MODIS satellite product "MOD16A2" which provides regular 500m's resolution pixel of evapotranspiration. I basically need to extract from the map the mean value of different ...
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1answer
1k views

Combine two collections (MOD13Q1 and MYD13Q1) from Google Earth Engine

Need to combine two image NDVI collections (MOD13Q1 and MYD13Q1) in Google Earth Engine but don't know how to proceed. My proposed workflow is to combine the two NDVI products from two collections to ...
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1answer
520 views

Is there any reason NOT to use MODIS sinusoidal projection?

I have a large number of MODIS snow rasters which I am cropping with the extent of a shapefile. Currently, I am using spTransform so that my shapefile has the same CRS as the rasters. This code works ...
2
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1answer
578 views

Adding timestamp to video export in Google Earth Engine

I am exporting an image collection to video using: Export.video.toDrive({ collection: mov_EVI, description: 'Modis EVI-Classified Water', dimensions: 720, framesPerSecond: 10, region:ROI });...
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0answers
111 views

AOD measure from MODIS satellite images

I need to use the MODIS Terra images, in particular the daily data that contains information about Aerosol Optical Depth. What do i have to do is to obtain the value of AOD in some precise point(in my ...
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1answer
730 views

Harmonic MODIS trend in Google Earth Engine?

I would like to plot in a histogram the difference between the real SAVI values and the harmonic trend. I use this code and I cannot make it. // Load a collection of Landsat TOA reflectance images. ...
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1answer
34 views

Clipping Modis ocean color chlor-a data using shapefile in R?

How do I clip Modis ocean color chlor-a data using a shapefile in R? .libPaths("C:/R-packages") library(raster) library(ncdf4) setwd("G:/Geoinformatics/Second semester/Spatial Statistics/...
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1answer
181 views

Mean per district - Google Earth Engine

I am trying to calculate the temperature per district in Afghanistan with the following code. However, I receive the following error when trying to calculate the mean per district: Unrecognized ...
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2answers
887 views

Using MODIS data in ArcMap?

I have downloaded MODIS data (from ladsweb.modaps.eosdis.nasa.gov) which I would like to view in ArcMap 10.4. It's MOD14 thermal anomalies data. Currently I can place the data on a map, but it ...
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0answers
878 views

MODIS Projection Google Earth Engine

Why if I applied a code over a MODIS collection and then I download an image, the image is in WGS projection? The code is the next: // Simple regression of year versus NDVI. // Define the start date ...
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1answer
228 views

Apply mask in bulk ENVI

I have a stack of MODIS images consisting of 400+ bands. A stack of NaN masks is created corresponding to each layer of the MODIS stack. I wonder if there is a way to apply the mask layers in bulk in ...
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0answers
42 views

How to correct the deviation of reprojected MODIS L1B by using the gdalwarp?

I am working on reprojecting the MODIS L1B data which downloaded from the NASA EOSDIS Reverb website. The data is MOD021KM. I applied the gdalwarp command to convert the projection of the image to the ...
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2answers
2k views

Export time-series MODIS 16 Day NDVI and EVI Data on Google Earth Engine [duplicate]

I want to extract every single MODIS 16 Day NDVI and EVI Data image on a particular area from 2000 to 2016. I was able to filter image collection but I do not know how to export every single image on ...
4
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1answer
275 views

Getting tile number of sinusoidal MODIS product from lat/long?

I'm using this tool to get the tile number (horizontal/vertical) from lat/long. Is there any code,preferably python, to get the tile number ? I tried using this tool. But it gives wrong tile number. ...
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1answer
200 views

ModisDownload - doubts when using MRT tool

I am using the incredible MODISDownload function from the rts package in R to download NDVI data on vegetation index in Africa. I have two questions. I am using the latest version of the package ...
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2answers
567 views

Spatial downscaling of MODIS LST grids using a covariate (e.g. NDVI): available software?

I have a MODIS MOD11A2 (LST) grid, which has a spatial resolution of 1000m. For the purpose of Surface Energy Balance modelling, I'm trying to improve the resolution of this data to 250m, using a ...
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0answers
59 views

Averaging MODIS 8-day LST for each pixel in a region to generate annual mean LST [duplicate]

I have downloaded 8-day MODIS LST products (MOD11A2) for the whole year of 2011 and is there any method in R to extract those pixels in clear sky conditions with emissivity error < 0.01 and LST ...
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1answer
365 views

Earth Engine ImageCollection filter alternative temoporal bands

As my question in Remove alternate features from ImageCollection was put on hold, I am clarifying the question here. I am using google earth engine for some analysis. I can import MODIS vegetation ...
2
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1answer
382 views

Calculation of fractional cover for each vegetation class at 30-m resolution matching MODIS swath in R

Currently I have a Landsat land cover map with 30-m resolution and I want to calculate the fractional cover for each vegetation class (forests, grasslands and croplands etc.) matching MODIS swath and ...
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1answer
74 views

Why the shape of MOD02 image that was processed by gdalwarp is different with the image by the MCTK

I am trying to project MOD021KM from Sinusoidal to WGS84 using gdalwarp with Python. The original image with HDF format was downloaded from NASA EOSDIS Reverb website. I used the code below. Moreover, ...
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1answer
128 views

How to keep the DN value range (data type) after projecting MODIS using gdalwarp with python

I downloaded the MODIS images with HDF format from NASA EOSDIS Reverb website. And I am trying to project MOD09GQ from Sinusoidal to WGS84 using gdalwarp with Python. However, the DN value range (data ...
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1answer
473 views

Downloading MODIS products with R package rts

I'm having trouble batch downloading MODIS products with the rts package in R. I'm using the code below to download the MODIS products: library(rts) library(raster) library(RCurl) bands = "0,1,0,0,1,...
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1answer
439 views

Downloading MODIS tiles with rts package in R?

I'm having trouble using ModisDownload(). Every time I use the command, I get the following error message: Error in .getModisList(x = xx, h = h, v = v, dates = dates, opt = opt, : Download error:...
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1answer
747 views

Trouble installing GDAL in R for MODIS package

I'm having trouble installing GDAL in R with the MODIS package. Every time run MODIS I get this error: GDAL : Not available. Use 'MODIS:::checkTools('GDAL')' for more information! I have tried ...
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1answer
605 views

Landsat / MODIS spatio-temporal fusion: STARFM and software implementations

My main goal is to create Landsat/MODIS image pairs, perform an spatial-temporal fusion which leads to synthetic composites on dates between Landsat acquisition dates. This brought me to the paper ...
2
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2answers
394 views

MODIS swath footprints - list of names or polygon dataset?

I'm trying to find either a list of all of the MODIS Terra swath footprints, or boundary dataset (i.e. polygons) with the footprint code as an attribute. I've searched high and low on various NASA ...
2
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1answer
216 views

Iterating and extracting subdatasets from hdf files and exporting data into MS excel using ModelBuilder? [closed]

I have a large amount (10 years of data!) of MODIS LST .hdf files that I need to load into arc, extract subdatasets and import data into excel so it can be analysed. As I have such a large dataset I ...
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1answer
218 views

Batch for Mosaic of MODIS Swath

I'm using gdalwarp to convert a large numbers MODIS Swath (MOD11, MOD06, MOD07) products to TIF and need to mosaic the output images with same day of year. There is a example of output data: ...
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1answer
207 views

Batch conversion of Modis Swath (level 2) data

I'm using very MODIS Swath products and need to import some bands to TIF. I'm working with MOD06_L2, MOD07_L2 and MOD11_L2 products and the MRT Swath isn't work as well. I'm using the following code: ...
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0answers
489 views

Automatically exporting time series of multiple polygons to .csv [duplicate]

I want to export data to a .csv file without having to display the chart. Similar to what is done here. I want to skip the chart-display part because I'm working with long times series and if I try ...
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1answer
425 views

How to mosaic multiple modis tiles of several dates using mrt tool?

How to mosaic multiple tiles of Modis MOD13Q1 in loop. I have about 395 files of each tile from a total of four tiles. I am using linux operating system and therefore use shell script. I need to ...
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0answers
242 views

Binary cloud Mask from MODIS (MOD35_L2) using MRTSWATH

When the MRTSwath tool is fed with MOD35_L2 cloud mask HDF file, the tool provides six tif images (b0 till b5). Each tif file has 8 bit information. Are these 6 images somehow indicating the 48 bits (...
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1answer
459 views

Reprojecting from MODIS Sinusoidal to Web Mercator: how to calculate output raster dimensions?

I have a MODIS image from AWS in sinusoidal projection and I want to calculate output raster size after reprojecting it into Web Mercator (EPSG:3857). $ gdalinfo MCD43A4.A2017185.h11v03.006....
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1answer
150 views

MODIS L1B reprojection and mosaic problem

I have been using MODIS L1B file to retrieve water vapor content. However, my study area is exactly between the gap between two images,just like this: I have tries ENVI MCTK extensions, HEG TOOLS, ...
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1answer
264 views

How to convert NoData values to other values for raster data?

I have a NDVI map from MODIS data for my AOI. When classified, i noticed that few of the pixels appear in " white" color and show no value. How do i classify these pixels and attache an appropriate / ...
3
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1answer
198 views

Alignment problem in 2 vector shapefiles with the same projection

I have 2 vector shapefiles of Manila that are supposed to align, but they do not (screenshot attached). I have projected them to the same projection (World Mercator WGS 84, EPSG 3395). One shapefile ...
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1answer
1k views

Google engine MODIS and filter by polygon

I tried to apply "filterBound" function to a MODIS image collection, using a polygon, but it doesn´t work. This is my script : var monte = ee.FeatureCollection("ft:1Sm4ObZgrKeCP-VlFa6Jf019-...
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0answers
136 views

Issue with mapping MODIS SIN grid to EASE 2.0 with gdalwarp

I am trying to merge and reproject MODIS 250m NDVI product (https://lpdaac.usgs.gov/dataset_discovery/modis/modis_products_table/myd13a3_v006) to EASE2.0 grid. I am interested in projecting these to ...
1
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1answer
341 views

Automating MODIS image download and its processing in ArcGIS Desktop? [closed]

For MODIS satellite images how to automate the download, unzip, import and process to point and then to Excel for each climate satellite MODIS layer. There are 3650 days of imagery to process with 8 ...
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2answers
765 views

Aggregation of MODIS 16 days data to annual data set

Is there a way to calculate mean annual NDVI and mean annual EVI from the time series MODIS images (2000 - 2016). I have gridded data downloaded to the local drive. Planning to use R for this work.