Questions tagged [modis]

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

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9 views

pymodis download xml auxiliary files error

I have been using the pymodis module successfully to download and process images from lpdaac (https://e4ftl01.cr.usgs.gov). I have been having issues lately with NASA uploading aux.xml files along ...
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29 views

Creating a mapset and PERMANENT location for multiple GeoTIFF files in GRASS GIS?

I have a 2 year MODIS time series, with 45 files, all in tiff format. However, I don't know how to create a mapset for all files. I can only do it for one file. How do I create for my entire time ...
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20 views

What is this giving me? Trying to sum MODIS ET data by each month

I am currently evaluating water resource availability over the Bahamas using GEE (I'm new to this) and am running into some trouble. I am trying to sum the ET over the Bahamas for each month from ...
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2answers
55 views

How to calculate and export tasseled caps from MODIS collection in GEE?

I would like to calculate and export the brightness, greenness and wetness tasseled caps for the MODIS MCD43A4 V006 collection based on the Lobser coefficients, but I have no idea how to do it. var ...
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43 views

Error when running StarFM

I aim to make the fusion of Landsat and Modis using STARFM at USDA StarFM I tried to conduct this process in R, in which we call the software using this code: system2(command="./StarFM.exe",args="...
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1answer
58 views

How to compute only urban area from the give code

'land_and_cover_type_1" class has 1-16 whare "Urban and built-up" has the valus 13 with color code a5a5a5 i only want to compute the urban part of land insted of whole 1-16 value how to do that var ...
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32 views

Map NDVI from MODIS image for a specific country

var dataset = ee.FeatureCollection('USDOS/LSIB/2013') .filterBounds(ee.Geometry.Point(-7.681, 53.43)); var image = ee.Image().float().paint(dataset, 'iso_num'); var visParams = { palette:...
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1answer
49 views

NDVI from Google Earth Engine

I want to get the NDVI of MODIS from Google Earth Engine in a country (Ireland), here is my code. It works, but it doesn't show on the map. var dataset = ee.FeatureCollection('USDOS/LSIB/2013') ...
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1answer
32 views

When working with MOD09GA product, is supposed QC bitmask for high aerosol quantity to return 4 values?

it's the first time I'm working with MODIS data and I am a bit confused about how bits work and how masks are created. After a bit of research I've been able to understand, more or less, how bit ...
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47 views

Creating Cloud free images out of a MOD09A1 MODIS image in GEE?

How can I mask clouds in a MODIS\MOD09A1 images in GEE? I know I should do sth with the "Bitmask for QA", but how? var myImgCln = ee.ImageCollection("MODIS/006/MOD09A1") .filterMetadata(???
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38 views

Length of season not displaying properly in Google Earth Engine

I am new to using Google Earth Engine. I have a script which finds the length of season using the MODIS MCD12q2 image collection. When I click through the pixels in the layer I see there are unique ...
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16 views

Monthly albedo data for VIC

I am trying to download Albedo data for my research area. On NASA's Earthdata website I used the MODIS product MCD43A3,. First reason why I haven't downloaded the data is because my research period is ...
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56 views

Downloading MODIS data using Python with help of shapefiles

I want to download MODIS data at 250m (2 bands) and 500m (5 bands) for arond 2700 regions. I have the shapefiles for each of the region. How can I download the raw MODIS data (surface reflectance) ...
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20 views

Are there annual or monthly NDVI high res datasets? [duplicate]

I'm looking for a source of high res (250 meter seems the highest res available for MODIS?) NDVI composite datasets for either an entire year (or monthly snapshots) if not, in a format I can import as ...
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54 views

Export classified land cover types as table - Google Earth Engine

My question relates to extracting the area of different land cover types in a region. So far, I classified a Landsat7 image using MODIS data as classifier. When I choose a point on the Map, the ...
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1answer
97 views

Google Earth Engine Export CSV MODIS Pixel Data for Multiple Polygons within a Rectangle

Having watched GEE tutorials, pieced together code from several StackExchange questions and received help from Kuik and Jobbo90 I managed to write a code for a MODIS/006/MOD11A1 surface temperature ...
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17 views

making image to geometry with mobis images [closed]

I am trying to do the classification of farming areas and I do not want to include the city and forest areas. so I want to use land without forest and city. I want to make forest_and_city to geometry ...
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1answer
32 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 ...
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12 views

MCD12Q1 Quality Control

I am using ArcGIS Desktop. When using the MODIS MCD12Q1 IGBP classifications, is there any way to run accuracy assessment or Quality Control is the only way?
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1answer
34 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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1answer
63 views

Counting number of pixels from MODIS Burned Area Monthly Global 500m within shapefile boundary in Google Earth Engine

I have an ImageCollection derived from the MCD64A1.006 MODIS Burned Area Monthly Global 500m dataset available in Google Earth Engine. I've clipped it to the boundary of a national forest in ...
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1answer
88 views

Terra MODIS MOD11A1 LST values

I am having a hard time to figure out what this information refers to. It is stated at the product description of Terra MODIS MOD11A1 product (Wan et al.,2015). (from https://lpdaac.usgs.gov/products/...
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33 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 ...
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32 views

CRS errors whed reading MODIS NetCDF file

I am working with MODIS EVI 250m file in NetCDF format and trying to get the stack of EVI layers. So, I do: # check nc-file for variables names nc = nc_open(flist[1], write=FALSE, readunlim=TRUE, ...
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39 views

Reduce number of null values in MODIS surface temperature data

I am trying to reduce the number of null (no data) values in output data for an area (Tokyo prefecture) in August 2019 when using MODIS 1km spatial resolution daily surface temperature satellite data (...
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20 views

How to sum GDD for a specific date range over multiple years?

I have written a basic code that can sum GDD for a specific date range for a single year as seen below: var dataset = ee.ImageCollection('MODIS/006/MYD11A1') .filter(ee.Filter.date(...
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9 views

Filter collection with millis data on MODIS

I'm trying to split a modis collection in two others, using like a splitter a data time that's defined in millis. I don't want to do it manually. var maskMOD13Q1 = function(image) { var qa = image....
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1answer
115 views

Creating NDVI time series from single polygon of shapefile using Google Earth Engine

I am new in Google Earth Engine, I am trying to plot ndvi timeseries from a single polygon of shapefile, but when I run the code I get "Error generating chart: Collection query aborted after ...
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1answer
34 views

Merging multiple satellite bands for science data set rasters?

I am using MODIS satellite imagery data for one specific derived band. The problem I am running into is that it is a MCD19 SDS layer, which contains different bands for each orbit overpass at a ...
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14 views

Calculating LST from MODIS Google Earth Engine? [duplicate]

How do I calculate Land Surface Temperature from MODIS in Google Earth Engine? I don't want to use the available products because I want to do it manaully. Which dataset should I select that has ...
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59 views

MODIS DAAC2Disk fails with “Unable to obtain ECHO token”

I have been using the tool DAAC2Disk to easily download NDVI using an extent. However recently the tool fails with the error: "Unable to obtain ECHO token" Has anyone encountered such error? Or know ...
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1answer
31 views

Is re-gridding a good idea?

I am working with MODIS Aerosol data (the Level-2 AOD_550_Dark_Target_Deep_Blue_Combined product). I am retrieving the data using the LAADS DAAC data API, and requesting all swaths as GeoTIFF files. ...
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41 views

GEE: resampling MODIS LST from 1km to 200km produces gradient

I am trying to resample raster from 1km resolution to 200m using this code: var august = ee.ImageCollection(landsat) .filterDate('2019-08-01', '2019-08-30') .filterBounds(geometry); //Mean ...
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17 views

Difference between local and global image co-registration

I want to co-register Landsat and Modis image after Reprojection and Resampling. So for that I was trying to understand the difference between local and global image co-registration of this library. ...
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23 views

Masking Landsat-8 and Modis (Aqua) with same shape file doesn't result in same shape

I was trying to mask Landsat-8 and Modis (Aqua image). FYI, I have converted the MODIS image to the same projection as Landsat and same resolution as 30m. Finally once i am done with masking using ...
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2answers
156 views

Resampling 1000m resolution Aqua MODIS images to 30m resolution

I am trying to resample the MODIS (aqua) image from 1000m resolution to LandSat image resolution which is of 30m for applying ESTARTFM technique. So you need to do preprocessing (Resampling and ...
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40 views

Google Earth Engine: calculate number of weeks where SST over a threshold in past 12 weeks

I've been using the MODIS-Aqua/L3SMI dataset to investigate sea surface temperatures (SST) for a specific region. What I'd like to do is for a specific time epriod (could be day, week or month), find ...
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2answers
90 views

Convenient way to download MCD19A2 product using R

I want to download MODIS MCDA219 product. I have been downloading manually from https://ladsweb.modaps.eosdis.nasa.gov/ and https://earthdata.nasa.gov . As a new to R user, recently I have learn ...
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1answer
47 views

My NDVI values are way out of range - GEE

I am supposed to collect NDVI values for some states in the USA. I understand NDVI is supposed to be between -1 and 1, but my values are in the 1000s. Can someone please help me with the ...
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23 views

Problem merging/clipping MODIS rasters in QGIS

Im pretty new to QGIS and am having some trouble making a NDVI map for Mali. To cover the whole country I need 5 MODIS NDVI tiles, however every time I try to merge them I get a "the following layers ...
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1answer
161 views

MODIS Fire Product tile conversion to GeoTIFF problem

I downloaded a tile (selected tile in the picture) from https://ladsweb.modaps.eosdis.nasa.gov/search/order/3/MOD14--6/2019-08-09/DB/Tile:H25V6 I used gdalinfo on the file. It's output is Driver: ...
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1answer
47 views

Getting Automatic MODIS HDF Files 2003-2018 by Shell Script [closed]

#!/bin/bash # This Script is for getting Automatic HDF Files # Product MODIS MYD11A2 Data From web https://e4ftl01.cr.usgs.gov/ # Change Login And Passwords User registred on Earthdata # This ...
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1answer
95 views

Analyzing MODIS Aerosol Optical Depth

I want to extract AOD from the following hd5 file. My objective is to have a tif file projected in EPSG:4326 with values of all 3 bands. https://e4ftl01.cr.usgs.gov/MOTA/MCD19A2.006/2018.11.08/...
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38 views

Monthly Water Area Monitoring in Google Earth Engine?

I've computed water area for each 8 days for about 20 years. I don't know how can I compute monthly area for these years? or How can I change 8 days product to the monthly in this code? code link: ...
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16 views

Correcting an inaccurate edge effect on MODIS L2 swath data?

I am currently trying to process a MODIS MOD10_L2 product (Snow Cover 5-Min L2 Swath 500m, Version 6) to extract snow cover information. It's in HDF-EOS format and I process it with GDAL in Python and ...
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45 views

Calculate per pixel Landsat Relative Azimuth Angle (RAA)

Iam Trying to Generate Landsat-8/OLI NBAR images. Given that USGS Landsat-8 Angtool can generate per pixel view_zenith, view_azimuth, sun_zenith and sun_azimuth angle bands. Is Relative Azimuth Angle ...
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94 views

Calculate per pixel Sentinel-2 Solar and Sensor Angle Views

I am working with Sentinel-2 images and would like to generate per pixel angle bands (view_zenith, view_azimuth, sun_zenith and sun_azimuth). Considering Sentinel-2 SAFE structure, I found that ...
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35 views

Scaling factor for MODIS (MY09GA 006 or MYDTBGA 006) product for timeseries data

I was using Modis data (MYDO9GA) product for my research and I was following this document as a user guide. https://landweb.modaps.eosdis.nasa.gov/QA_WWW/forPage/user_guide/MOD09_UserGuide_v1.4.pdf ...
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188 views

Export coordinates' values over a rectangle on Google Earth Engine

I am currently trying to export coordinates (and their values) of MODIS Aqua daily hotspot dataset for one month (November 2018). My idea is selecting a region using a rectangle geometry of the image ...
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2answers
88 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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