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Questions tagged [modis]

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

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3k views

How to tranform MODIS tiles into lat/long?

I'm trying to get the vegetation index nearest to a particular lat/long. I'm getting the data from here which is 250-meter spatial resolution hdf file. The globally gridded projection is split in 36 (...
2
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1answer
2k 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 ...
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3answers
1k views

GDAL HDF4 Driver on Linux System

I'm running code that works with MODIS HDF4 datasets on a Debian Linux distribution. I am also running this code on a Windows machine. On both the Windows and the Linux machines, I have the most ...
2
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1answer
2k views

How to make a cloud mask from a daily MOD09 image?

I'm currently working with MODIS data and i've been having some trouble with several aspects of the steps I need to take. For example, I need to make a cloud mask from a daily MOD09GQK image, and i'm ...
2
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1answer
187 views

Modis V6 SRID Information

I am working with the Modis version6 NDVI/EVI 16 day composite dataset (MOD13Q1). I am developing a automated algorithm to download, aggregate, and processes the dataset. Therefore, I do not want to ...
2
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3answers
242 views

MODIS temperature and NDVI data?

hope anyone could give me some hints here. I tried to download free MODIS data from their page(resolution 500m, 1km). Im interested in NDVI and temperature data. But when i load the hdf files into my ...
2
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2answers
671 views

GDAL 2.0.1/QGIS 2.14.0 on OSX won't open MODIS HDF?

I'm on OSX 10.9.4, using GDAL 2.0.1 from the terminal. I want to mosaic MCD12Q1 HDFs together with GDAL but my build can't even read them. The file: http://e4ftl01.cr.usgs.gov/MOTA/MCD12Q1.051/2001....
2
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1answer
1k views

Calculating NDWI in Erdas IMAGINE 2014

I'm using MOD09GQ product of MODIS to calculate vegetation indices in Erdas 2014, and I was able to extract NDVI using Erdas Model Builder. What is the formula I should use in model builder for ...
2
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1answer
2k views

Evapotranspiration in Modis

I need the Evapotranspiration data for my study (The study area is located in Australia). Somebody told me maybe I can use MOD 16 MODIS actual ET estimates. I could not find this data on earth ...
2
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1answer
759 views

Kriging from raster with missing data in ArcGIS

I have MODIS satellite imagery that depicts a range of surface temperatures. However, many of the cells are missing values. I think I need to perform Kriging in order to obtain an average value for ...
2
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1answer
484 views

Reproject MODIS level 3 chlorophyll data using gdal

I am trying to reproject MODIS Level 3 chlorophyll data (for instance, this file) using gdal in R. I used gdal_translate and gdalwarp functions. There was no crs information associated with ...
2
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1answer
193 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 ...
2
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1answer
373 views

Calculate mean values for all bands and date to a dataframe

I have 5 rasters, each having 10 bands, where each band corresponds to a specific date. How do I calculate mean values for all 10 bands and save them? I need to save the mean values in a dataframe ...
2
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1answer
344 views

ImageCollection Exporting by years

I am working with MODIS-NDVI data (MODIS/006/MOD13Q1) in Google Earth Engine. I have a script which exports each image in the image collection for given area and time period. I need to upgrade script ...
2
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1answer
419 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 ...
2
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2answers
454 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
509 views

Error in GDAL for MODIS library in R

An answer was provided to this question previously, however it did not solve the question. I am analyzing MODIS data, and would like to download and process the data. Here's what I have done so far: ...
2
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1answer
454 views

Download Modis LAI/FPAR product with MODIStools R package

I want to download the full MODIS archive for the LAI product using the MODIStools R package. I am running the command lines below but the output file only contains data from 2014 onwards. Any idea ...
2
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1answer
5k views

Creating raster stack using R?

I have 300 .tiff files, that i need to create raster stack of them. Can you please help me with R code for that? I can do in Arcgis, Envi, R. I have tried: setwd("F:\\MODIS\\Modis EVI\\HDF8 EVI") ...
2
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1answer
151 views

Modis enumeration definitions

Modis MYD03 and MOD03 files contain Land/SeaMask (uint8 with valid_range=0,7) and WaterPresent (uint8 with valid_range=0,8). Though the attribute fields define the valid range, they do not define the ...
2
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1answer
526 views

Failure in TIMESAT integral calculation

in short: My TIMESAT image-output of the seasonal parameter “Large Seasonal Integral” is wrong. TIMESAT continues to write a file with negative values (as 16 byte Integer) although Parameters should ...
2
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1answer
922 views

Reprojecting MODIS Sea Ice Extent and IST data using GDAL

This is an additional exploration of the problem described at Reprojecting MODIS Ice Sea Temperature products with gdalwarp which was never answered in a satisfying way (I apologise for the length of ...
2
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1answer
147 views

TIMESAT Land cover class

Is it possible to monitor phenology of only 2 land cover classes in TIMESAT? Example is corn and wheat for 7 years. Sowing structure of this crops changes every year, i.e. their location on an image ...
2
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1answer
1k views

Modis Reprojection Tool mirror or download alternative?

I need to convert and reproject a complete archive of MODIS *.hdf data. NASA's Modis Reprojection Tool is literally designed for this, and I even have an old script from the last time I performed ...
2
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2answers
886 views

MODIS Level 1B batch process

I am a new MODIS Level 1B user. I have been using the MODIS Swath tool to process my images. However, I have over 1000 images to process. I was wondering if there a script available in IDL or R (very ...
2
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1answer
29 views

Why is MOD17A3 GPP is showing huge values in R?

I have downloaded Gpp_1km (MOD17A3.055)data from MOD17A3 thorugh https://lpdaacsvc.cr.usgs.gov/appeears/ from the years 2000-2010. However when I opened all the tif files in R, each tif file showed ...
2
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1answer
382 views

Troubleshooting downloading MODIS NDVI Data in R

I am trying to download MODIS Data from 2000-2018, however I am encountering some difficulties. Here is my script MODISoptions(localArcPath = "/Volumes/myserver/MODIS/data", ...
2
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1answer
237 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 ...
2
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1answer
183 views

Converting MODIS LAI data (2001) from HDF to GeoTIFF?

I am trying to convert MODIS Leaf Area Index (LAI) data from .hdf to GeoTiff from 2001. I can successfully convert it using R for the more recent datasets using the following code: library(gdalUtils)...
2
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1answer
127 views

How do you extract the mean fire frequency (raster) for each point within a given buffer size using R?

I am trying to extract fire data (mean and max fire frequency) for each point within a given buffer size (250m) around multiple points. Currently, my point data is in Lat and Long. For the raster ...
2
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1answer
764 views

Switch an R script from “MODIS Reprojection Tool” to “ModisSwathTool”

This R script works with MRT (MODIS Reprojection Tool), and its performance is unbelievable for land data. The only problem is when you use Atmospheric data from Modis, like "MOD05_L2". The problem ...
2
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1answer
567 views

Maintaining spatial integrity of Matlab matrix with missing data [closed]

I am working with MODIS Terra imagery (MOD13Q1). I am currently trying to compute the autocorrelation structure of the pixels in an MODIS NDVI raster. The problem is that I have clipped the original ...
2
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2answers
869 views

Not able to bulk download MODIS images

I am trying to download Modis NDVI and EVI images. I have used the following R-code: setwd("/home/karthik/Valmiki/Modis_bands/") library(raster) library(RCurl) source("ModisDownload.R"...
2
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1answer
155 views

Compute number of days with snow

I have a project and I want to map the effective number of days with snow cover for a year in some mountain area. Until now, I have processed the MOD10A2 (8 days snow cover) product derived from MODIS ...
2
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1answer
1k views

split multi-band raster to separate rasters in ERDAS IMAGINE

I am currently using ERDAS IMAGINE 2013. I have a 28 Band MODIS image. Is there any way in IMAGINE I could split the 28 bands of the MODIS image into single band images?
2
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1answer
348 views

Lat/lon of pixel inside Landsat scene

How do I find the lat/lon of each pixel inside a landsat scene. Either the equations for converting i,j to lat/lon or just a bunch of files, one for each scene. Background: I have downloaded a bunch ...
2
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1answer
994 views

problem of using TIMESAT to processing MODIS NDVI

I want to use TIMESAT software to analyse time series MODIS NDVI data. Firstly, I use MRT tool to mosaic,subset and project MODIS NDVI data and output data as GEOTIFF format, and save as ENVI standard ...
2
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1answer
241 views

Reproject gif.gz raster to WGS84 in QGIS

I am a steep learning curve into QGIS. I have a raster of global fire maps from the modis site: http://lance-modis.eosdis.nasa.gov/imagery/firemaps/firemap.2013221-2013230.8192x4096.gif.gz I would ...
2
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0answers
31 views

Accessing MODIS subdatasets from the command line?

FYI I'm new to command-line geospatial operations. I'm working with the MODIS BRDF-Albedo Quality product (MCD43A2) and am trying to: 1) do a simple gdal_calc.py operation to mask certain QA values ...
2
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0answers
66 views

Smoothing MODIS LAI? [closed]

I am trying to smooth 8 days LAI data from MODIS and managed to work around it with several algorithms such as loess, Savitzky–Golay, smooth.spline etc. This is pretty much going well if the level of ...
2
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0answers
93 views

Downloading subset of MODIS data through HTTPS [closed]

I need to download 'MYD04_3K - MODIS/Aqua Aerosol 5-Min L2 Swath 3km' data for India. I found two ways to download it: Go to the website and select product details etc. I have been able to automate ...
2
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0answers
159 views

gdal.Open is giving none [closed]

I am having some problem with Gdal.open with my list of raster. I use Python 3 with GDAL 2.2. This is my script: import os import glob from osgeo import gdal import numpy as np import matplotlib....
2
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0answers
330 views

Nonlinear regression in Google Earth Engine on each pixel in an image collection using GEE's servers

I am attempting to optimize the parameters for a double-logistic function on an annual MODIS NDVI time series in Google Earth Engine. I have previously looked at Non Linear Regression in Google Earth ...
2
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0answers
52 views

Inaccurate alignment of MODIS HDF image (Dark Target product MYD04) [duplicate]

I have an issue with georeferencing of HDF files for the MYD04 product from MODIS (Dark Target Aerosol). A sample HDF file is given in the following link - https://www.dropbox.com/s/...
2
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0answers
43 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 ...
2
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0answers
638 views

Download HDF NDVI in R

I have a function to automate downloading NDVI data from https://e4ftl01.cr.usgs.gov/MOLT/ However, I'm hitting an error when downloading the .HDF files. They download fine but they seem to be ...
2
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1answer
162 views

Which output data type to choose in QGIS SAGA Raster Calculator in Batch Mode?

I have 5 years of MODIS13Q1 NDVI .tiff images for time series analysis. I want to multiply all the images with the scale factor of 0.0001 before using them. In order to process all at once I try to ...
2
votes
2answers
256 views

How to match MODIS reflectance files (e.g.,MOD09GQ) with correct cloud mask (e.g., MOD35_L2)

I hope to be working with MODIS data, mostly the V6 250m reflectance files (e.g., MOD09GQ). The naming convention of these files makes it easy to identify which .hdf covers my area of interest (i.e., ...
2
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0answers
497 views

Get Modis tile from lat long

I'm trying to get the MODIS tile that I need, I can get it using online calculator http://landweb.nascom.nasa.gov/cgi-bin/developer/tilemap.cgi but I need to get it in code. How I can convert lat, ...
2
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0answers
55 views

Finding pre-processed MODIS products?

I am trying to recognize burnt areas based on some MODIS products and I just realized that I am missing a bunch pixels from the coastline masking. As you can understand that is an issue because I am ...