Questions tagged [modis]

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

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1answer
594 views

QGIS: RGB Image display results in odd colors (MODIS)

I am trying to make a rgb map of MODIS data (Dataset09 Radiances) with QGIS. First I converted it to tif with gdal (and python). Since I did not really understand all of GDALs funcionality I used a ...
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2answers
222 views

Modis LandCover processing

is there any tool to open and process MCD12Q1(modis landcover product)? apparently ENVI doen't work for this. any help highly appriciated.
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1answer
537 views

Does MOD021km images from MODIS needs atmospheric corrections

I have downloaded some mod021km modis images and I want to work with them. I want to know if these data need atmospheric corrections? Perhaps something like FLASSH in ENVI or other methods. I can ...
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3answers
622 views

problems of display modis ndvi with TIMESAT

I use MODIS MRT tool mosicia tow tiles MODIS NDVI data, then use TIMESAT image view to display the mosaic data, encounting file size waring : and after drawing data, the sequences of two tiles is ...
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1answer
315 views

change spatial resolution

I have two types of image, one of them is a TRMM image with 0.25 degree cells and the other one is a MODIS image with 1 km spatial resolution. How can I change my TRMM image resolution to 1 km ...
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2answers
454 views

Getting started with 'shell scripting loops' in GRASS

I'd like to work through the MODIS-Aqua example here. But typically the hardest bit is getting off the ground. What specifically does it mean by 'shell scripting'? is it referring to the command ...
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1answer
1k views

How to calculate an hypsographic curve of a raster trhough a DEM

I am using Arcgis 10.1. I have a MODIS raster from the NSIDC website with a pixel resolution of 500 m and an attribute table with the fields 'VALUE' (as the code of snow, clouds, etc.) and 'COUNT' (as ...
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1answer
31 views

Google Earth Engine MODIS Pixel-sized Spaced Points Position Adjustment

I have managed to export a time series of MODIS daily surface temperature pixel data from the Google earth Engine Code Editor using a combination of code scripts provided by Stack Exchange, here is ...
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2answers
70 views

stack() in R does not include all .tiff files in my directory

I am trying to perform stack() in R using enhanced vegetation index (EVI) time-series maps but it doesn't include all the .tiff files in my directory. Here's the list of files when I dir(files.evi): ...
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1answer
58 views

Is the layer value of MODIS Day_view_time and Night_view_time in Local Time or in Local Solar Time?

On the NASA homepage in the layer description you can find following line for the Day_view_time layer: Does this mean that the layer contains the Local Time (LT) in the corresponding local time zone ...
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1answer
391 views

Creating loop in Google Earth Engine?

I have written a code that is taking data from MODIS about NDVI, filter for March only , calculates the mean value for the whole month and clip it with geometry. The NDVI data is for period of years, ...
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1answer
62 views

Range value of raster data varies before and after mosaic implementation

I am trying to raster::mosaic bunch of .tif files extracted from hdf4 MODIS files. My script is working fine but I am puzzled by the range of raster values (min, max) before and after data processing. ...
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1answer
66 views

Why is the difference between 005 and 006 versions of MOD13Q1 data?

I tried to repeat a project that used EVI in MOD13Q1. I failed and found that the project used the 005 version of MOD13Q1, and I can only download the 006 version on NASA's ftp. I compared the 005 ...
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1answer
93 views

Using accumulate function for temperature units?

I am working on a piece of code that is designed to aggregate growing degree days for a particular region. To start, the equation for growing degree days is: Daily GDD (°F) = Daily Average ...
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1answer
72 views

Creating heat map animation based on point-shapefile with data attribute in ArcGIS [closed]

I want to create an animation of forest fires, using the NASA' MODIS data for the last 11 years. Their shapefile has acquisition data attribute — and it goes day by day all those years. I've already ...
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1answer
188 views

How does ee.Reducer.median() differ from just ee.ImageCollection.median() - Issues with a chart?

I am trying to create a chart that displays an image series from an Image Collection and there are two things that I do not understand: In the first part of the code that you will see below, I do not ...
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1answer
138 views

Trouble Getting MODIS Fire Data with Google Earth Engine

I am trying to use the MODIS Terra Thermal Anomalies & Fire Daily Global dataset to get fire data in a date range at random points. I have the following code: var dataset = ee.ImageCollection('...
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1answer
58 views

Point data extraction and printing as a TABLE

I am working with MODIS-NDVI image collection in Google Earth Engine. Below, you can find a script which is creating a chart of NDVI values over the given period for particular location. I would like ...
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2answers
149 views

How to classify entire pixels within loaded polygons as a feature collection, in Google Earth Engine

I need to determine the Modis pixels that enter whole within the polygons contained within a feature collection. I also need to determine those who don't fully enter. Apologies for English This ...
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1answer
342 views

Getting Temperature Data of Given Point Using MODIS LST Data?

I am trying to get MODIS satellite data with Google Earth Engine to find temperature data of given points on a map. I would like to get an array of all the points in an area (every 1km square in ...
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1answer
118 views

How to download MODIS NBAR(MCD43B4)product?

Description: The MODIS nadir bidirectional reflectance distribution function adjusted reflectance (NBAR) product (MCD43B4), 1 km spatial resolution and a composited 16 day temporal resolution. ...
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1answer
42 views

Does the MODIStsp package computes the QA's and eventually corrects the bad quality pixels?

I am using R's MODIStsp package for downloading MOD11A2 time series products. While executing the command it was written that QA's were computed. Several files were created, LST_Day_1km, QC_Day, ...
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2answers
274 views

Reproject MODIS data using R (results in NAs or no spatial extent)

I am using GLASS albedo data stored here for pre-2000 (AVHRR) data and here for post-2000 data (MODIS). My end goal is to create a raster stack of each month that contains white sky albedo data from ...
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1answer
176 views

Can't extract chlorophyll a values from NetCDF file using R

I'm trying to get the chlorophyll a values from a NetCDF file using R software, but all I'm getting are missing values, NA. I would like to know if I'm doing something wrong or if the file really just ...
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1answer
346 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 ...
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1answer
584 views

Extract raster values to CSV in Python

Attempting to gather MODIS aerosol data for a number of different AERONET stations in the UK to plot against one another. However, due to the number of files (upwards of 2000), QGIS and ArcMap crash. ...
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1answer
67 views

Reducing monthly averaged MODIS data over several ROIs

I want to create monthly averages for the MODIS Land Surface Temperature (LST) product for several ROIs. I am able to create an image collection containing the monthly averaged MODIS data, but I have ...
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1answer
94 views

MODIS: MYD021KM data set - can't find radiance scales to convert SI to radiances

I would like to convert the scaled integers (SI) to radiances for all my SDS MYD021Km thermal emissive bands. In the MODIS Level 1B Product user guide on page 36 in section 5.5.1 it says: The ...
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1answer
271 views

MODIS R Connection error

When i'm running my MODIS Download R script on my Windows, i'll get this error : ############################ Remote connection failed! Re-try: 49 Getting file from: LPDAAC #########################...
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1answer
90 views

MODIS getHdf : Error in .local(product, …) : Problems with online connections try a little later

I have a big problem today, i have this error while i'm executing my script : Error in .local(product, ...) : Problems with online connections try a little later My script : b1 <- getHdf(...
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1answer
294 views

LST MODIS harmonic fitting in Google Earth Engine - Predicting Future Scenarios?

I've been working on code for harmonic fitting of MODIS LST data. The code is working fine; however I would like to create future LST images in future dates by using the "fitting" band. Thus, I would ...
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1answer
452 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
79 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 ...
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1answer
35 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
489 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
510 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
331 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 / ...
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1answer
330 views

Acquiring MODIS data?

I am trying to figure out how to use INLA without any formal instruction and I have visited the INLA website (www.r-inla.org) to view some examples. I have also been reading through the book Spatial ...
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2answers
404 views

Error with MODIS download in R

I hope somebody knows this error message, since I managed before the downloading with the same script (last year): source("ModisDownload.R") mrtpath <- '/home/usuario/MRT/MRT/bin/' modisProducts()...
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1answer
116 views

Getting / displaying all data bands in ArcMap using *.hdf data?

I was using modis snow cover product with ArcMap 10.1 which had 2 data bands (0,1) and suddenly it stopped showing one of the bands which i needed (1, the snow cover). How to get that data band back ...
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1answer
842 views

multiply range of value NDVI of Modis product in Google Earth Engine

Modis product have range of value NDVI from -2000 to 10000, but I need this range of value modify on range from -0,2 to 1 This is my code for finding NDVI in region: var California = ee.Feature( //...
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1answer
452 views

PyMODIS: Setup and Running

I have installed pyMODIS along with Numpy and the necassary GDAL bindings. How do I go about running the scripts such as modis_convert.py and modis_download_from_list.py. Are these ran from the ...
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1answer
317 views

Modis Reprojection tool, BAD or missing Total_BANDS values

I am trying to convert Modis terra Level 2 data 3KM swath i.e "MOD04_3K" from HDF to GeoTiff. I am using Modis Swath tool. When I input my file it gives an error saying "BAD or missing Total_BANDS ...
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1answer
166 views

How to extract EVI from MOD13Q1 with MRTBatch?

I want to extract EVI from Modis MOD13Q1 from some scene of images. I use ModisTool and MRTBatch. I have selected ONLY 250m_16_days_EVI as selected bands. All is correct until I save the parameter ...
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1answer
572 views

How to remove cloudy pixel from MODIS NDVI (MOD13Q1)

I am using MODIS NDVI product (MOD13Q1) for the vegetation changes study. I want to remove cloudy or bad pixel from MODIS NDVI data. I am not getting any suitable method or software or any program to ...
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1answer
329 views

Process MODIS bands on QGIS

I would precess MODIS images on QGIS (in particular swath images MOD09A1). I use MODIS Reprojected Tool Swath to trasform .hdf file in GEOtiff but there are different avaible bands (16) and i don't ...
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1answer
67 views

how to download World MODIS image from ESRI ImageServer?

I need to download the following dataset that is available online in ESRI website: https://sampleserver3.arcgisonline.com/ArcGIS/rest/services/World/MODIS/ImageServer. I can view the map in arcmap as ...
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1answer
318 views

How can I export single bands of a MODIS image with QGIS?

How can I export single bands of a MODIS image (in particular MODIS Terra - MOD02HKM) with QGIS? It's .hdf file but with QGIS, I don't know to export these. I also used Modis Reprojection tool but ...
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1answer
43 views

How to apply Melt Area Detection Index to MODIS imagery?

I am working with some MODIS imagery for a project (I'm relatively new to remote sensing) using MOD09GA, and hoping to apply a melt area detection index (MADI) to images to calculate melt day length ...
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1answer
358 views

How to extract MODIS QA informaton

I want to use the LDOPE tool unpack_sds_bits to extract the bit information from the State QA layer of the MYD09GA Aqua Surface Reflectance product. However, I have never run a command line before ...