Questions tagged [modis]

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

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5
votes
1answer
6k views

How to reproject MODIS Swath data to WGS84

Im new to GIS and now working with MODIS04L2 Aerosol Optical Thickness image. I need to reproject the image to other coordinate system such as WGS84 for later work but now Im stuck with it. I have try ...
11
votes
1answer
12k views

convert from HDF to GeoTiff

I am having some problems with the conversion from HDF to GeoTiff. I am following the steps described in this webpage. The problem is that I can't find what is the NDVI subdataset name (XXXX) in ...
1
vote
1answer
260 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 ...
7
votes
1answer
6k views

Reprojected MODIS NDVI has range from -32768 to 32767, expected -1 to 1

I'm new to StackExchange and to remote sensing. I am working with MOD13Q1 250m 16-day MVCs. My goal is to use NDVI time-series to classify cropping pattern and crop type, then link this data to ...
3
votes
1answer
625 views

MOD09A1 QC layer

Does anyone know how to handle MOD09A1 Quality flags (QC) in in R? I was trying to use raster package but unable to unlock the QC band.
2
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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 ...
6
votes
1answer
2k views

How can I parse modis MOD13Q1 quality layers in R?

I'd like to parse MOD13Q1 VI quality layers in R. My original code must have been incorrect, because it gave lots of "deep ocean" flags in the middle of Brazil. After the changes suggested by Mikkel,...
4
votes
3answers
1k views

Download MODIS/MCD19A2 AOD product with R

I'm looking for a programmatic way to download MODIS/MCD19A2 AOD data in R. So far, I've found a pretty solid R package called MODISTools that works nicely with the MODIS/VIIRS RESTful API. However, ...
2
votes
1answer
586 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 });...
1
vote
2answers
753 views

Making stack from many images in Google Earth Engine?

Using the code below, I've computed 20 ndvi images for modis data. How can I stack and save them in a single file? var mod13 = ee.ImageCollection("MODIS/006/MOD13Q1") .filterBounds(geometry) ....
1
vote
3answers
5k views

extract scientific layers from MODIS HDF Dataeset using Python GDAL

I have been trying to extract scientific data layers from MODIS HDF files but without success. Before I have been doing this type of task using Arcpy, but I want the script that I am currently working ...
3
votes
1answer
2k views

GDAL not available in MODIS R package?

I am trying to analyze the MODIS EVI 250m, 16day dataset. I found the R MODIS package and am following the instructions here: https://conservationecology.wordpress.com/2014/08/11/bulk-downloading-and-...
2
votes
2answers
6k views

How do I convert the LST values on the MODIS LST Image to degree celsius

I have downloaded MODIS 8 day average LST images, but the values are way too high. How do I convert the pixel values to degree celsius? Someone said they multiplied the data with 0,02 and then ...
0
votes
2answers
3k views

hdf files in GDAL throwing an error in R gdalinfo

I am having issues using some modis hdf files in R. Working on Windows 10. I had a previous question where gdal wasn't working but I think I have resolved that. I tested with existing tifs and they ...
0
votes
1answer
887 views

Changing the the range for MODIS NDVI

I need to get MODIS NDVI (MOD13A3), but output from EarthExplorer or Daac2Disk HDF format is a numerical range is -2000 to 9996. But I need for futher work basic range -1 to 1. Is there any ...
5
votes
1answer
1k views

Reprojecting MODIS-Sphere ESRI GRID file to WGS84 using QGIS/GDAL

I have an ESRI GRID file projected in MODIS-Sphere (here's the dataset http://urban.yale.edu/sites/default/files/data/setoguneralphutyra_uf.zip) that I need to convert to a WGS84 GeoTIFF. I tried ...
1
vote
1answer
419 views

pixel values beyond valid range in QGIS

I opened a sub-dataset of an HDF file (NDVI layer of MODIS HDF file) in QGIS, but pixel values are beyond the valid range (-2000,10000). I see many pixels way less than -2000 and way over than 10000. ...
0
votes
0answers
451 views

reading raster without making QGIS apply the scale factor to the raster

Since QGIS multiplies the image with the scale factor when reading, it messes up the image if the scale factor is not properly defined to the data as QGIS expected. For example, I am reading MODIS ...
4
votes
2answers
2k views

Cannot properly import MODIS MOD07_L2 .hdf files into R using rgdal

I've been trying to accurately import and process some .hdf files from the MODIS Atmospheric Profile product (MOD07_L2) in R for several days now. Still, there's something going wrong during data ...
4
votes
2answers
444 views

How to correctly parse MODIS QA layers?

I'd like to correctly parse the MOD13Q1 VI Quality layer (see Table 2 in "layers" here). For this, I'm trying to follow Example 1 from this tutorial (page 10). I'll illustrate my problem with a pixel ...
3
votes
3answers
2k views

Convert 800 .hdf4 files to Tiff using GRASS/QGIS/SAGA/GDAL/R

I've have MODIS ndvi data (MODIS_Grid_16 days NDVI) from the iberian peninsula, from February of 2000 to August of 2012 (really big data). How do I batch convert about 800 .hdf MODIS files to .tif ? ...
5
votes
2answers
5k views

Opening HDF data in QGIS on Ubuntu?

I try to open modis aqua data (HDF5 format: A2015208112000.L2_LAC_OC.nc) on QGIS 2.8 ver. And an error appears: No extra dimensions found. Could someone help me to solve this problem?
4
votes
3answers
2k views

Installing gdal in CentOS without Root?

I have been struggling to get python setup to do some image processing, so I really need the http://www.gdal.org/ GDAL libraries installed on CentOS 6.5. I want to install the package in a local ...
3
votes
1answer
954 views

Google earth engine:SST by month per year

I'm trying to plot a chart and get data from Google Earth Engine. I'm using MODIS-Aqua/L3SMI data in Earth Engine. I have used Earth Engines in built functions to compare average sea surface ...
3
votes
1answer
292 views

Image Collection Statistics in Google Earth Engine?

How can I extarct mean of each image collection in google earth engine? for example for this code: var modis = ee.ImageCollection("MODIS/006/MOD13Q1") .filterBounds(geometry) .filterDate("2000-01-01",...
2
votes
1answer
2k 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
votes
1answer
1k views

Export data from time-series image collection to a table in Google Earth Engine

On Google Earth Engine, I'd like to accomplish two tasks: extract data from every pixel, across a time-series, within the given geometry bounds and save it as a table. I need a column which prints ...
2
votes
2answers
881 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 ...
1
vote
1answer
281 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'); ...
4
votes
1answer
620 views

MODIS data with .hdf extension not compiling in Ubuntu

I am trying to use GDAL to read .hdf file, but it does not seem to recognize the extension. It works fine in Windows system. The GDAL open command gives the following error message: ERROR 4: `...
3
votes
1answer
4k views

How to determine latitude longitude point from a pixel within a MODIS tile?

I need to know latitude / longitude of each pixel in a MODIS tile image in HDF in order to reproject from sinusoidal (MODIS) to mercator (Google Maps). I Can read values from HDF in my C++ program, I ...
3
votes
2answers
3k views

Batch Processing 400 MODIS HDF4 Files Using Several Tools In ArcGIS 10

This is my first post, I hope I don't screw it up. We have about 400 MODIS HDF4 files we are looking to batch process in the ArcGIS 10 or Python environment. The tools we are looking to use are ...
3
votes
4answers
646 views

ModisDownload error downloading only portion of hdf files

I am having problems with ModisDownload recently that I have not had when using it so far. I dowloaded, reprojected and mosaiced modis images about two months ago successfully, despite some errors ...
3
votes
1answer
1k views

MOD 35 Cloud Mask HDF in ENVI

I am having difficulty getting ERDAS or ENVI to correctly read and display cloud mask attributes from MOD 35 HDF files. They files are displayed as 0-255, whereas I expected some kind of code 0, 1, ...
3
votes
1answer
449 views

Reprojecting MODIS Ice Sea Temperature products with gdalwarp

I have problems projecting MODIS Ice Sea Temperature (IST) products to EPSG:3031 (Antartic Polar Stereographic) using gdalwarp. The product I'm working with is MOD29E1D, documented here, p33: The ...
2
votes
1answer
229 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
votes
2answers
292 views

MODIS MOD11A1 Reproject Change Data Value

I'm import and reprojected MOD11A1 with GDAL 1.10....my shell script is easy.. for file in *.hdf; do echo "map: $file" gdal_translate -of Gtiff -ot Int16 HDF4_EOS:EOS_GRID:"$file":...
1
vote
1answer
199 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 #########################...
1
vote
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 ...
1
vote
1answer
793 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 ...
1
vote
1answer
152 views

Geolocation of MODIS swath products

When dealing with MODIS swath products (or any swath products from VIIRS, SeaWifs, etc) such as those available here, is there any way of a-priory knowing the location a given file covers? Typical ...
1
vote
1answer
250 views

Strange effect in gdalwarp output

I am using gdalwarp in python to extract and re-project reflectance bands from MODIS level 1B (MOD021km). An example of the command that I am using is the following: gdalwarp -of GTIFF -tps -t_srs ...
1
vote
0answers
181 views

Calculate stats with GDAL Python or rasterio for each bands [closed]

I have MODIS EVI file stacking with 10bands. I use Python 3 in Spyder. I'm trying to rastersize shapefile and do mask to my MODIS EVI. This is my script : import os import glob from osgeo import ...
1
vote
1answer
80 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 ...
1
vote
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") ...
1
vote
1answer
187 views

Projected MODIS data not aligning with ESRI basemap in ArcGIS for Desktop?

I can not get 1km MODIS data aligned with ESRI basemaps in ArcGIS 10.2.2 for Desktop. See the photo below. I reprojected MODIS17A3 data using the MRT (MODIS reprojection tool). I selected WGS84 ...
1
vote
1answer
220 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: ...
0
votes
1answer
96 views

Getting 16 days composite in Google Earth Engine? [closed]

I've wrote this code. In this code I've call lst daily product. But I don't know how can I compute 16 days mean composite from daily product? code link: https://code.earthengine.google.com/...
0
votes
1answer
750 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 ...
0
votes
1answer
101 views

MODIS coastline issue

I have a few MODIS products and as I was combining my imges I realised that some of the pixels around the coastline where abit off.Is that a standard issue and if so should I use reproject or should I ...