Questions tagged [modis]

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

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6 views

Filling missing LST values

I wrote a code to retrieve LST values from a certain point. I am getting results but have NULL value as well, maybe due to cloudiness and ... I want to fill those gaps. Does someone have a running ...
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30 views

Error when downloading a reprojected image from 30m EPSG: 4326 to 250m SR-ORG:6974 at global scale in Google Earth Engine

I am trying to export an image (global scale) and I get the following error: Error: Reprojection output too large (117761x1982 pixels) The aim of the code is to download an image showing the % of ...
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1answer
24 views

How do I run Panoply (from NASA GISS) on Windows 10?

I am unable to run Panoply (from NASA GISS) to view NetCDF files. When I try to run it, it tells me that I need Java Runtime Environment 9, but the latest version of JAVA from the Oracle website is 8....
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Issue using pyModis.createMosaicGDAL() on Debian

I'm currently trying to automate some data processing with MODIS data using pyModis but am running into an odd issue. I've developed a script that I've run locally just fine. It downloads all the ...
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24 views

How can I automatically deselect a mapped layer in Google Earth Engine?

I am currently mapping land cover changes between two years, e.g. 2001 and 2010. The code I am writing adds the Land Cover layers to the map for both years, so a map of 2001 and one of 2010. Then, I ...
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30 views

How to change the extent of a similar raster in QGIS?

I have two MODIS evapotranspiration rasters and their information is given below. Desirable raster extents: Erratic raster extents: I want to change the erratic raster extent to desirable raster ...
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22 views

Python packages for processing NASA's MODIS products?

Is there any recommended (ideally) Python packages to streamline working with MODIS products, not so much downloading/aggregating (as does Pymodis), but downstream processing tasks such as calculating ...
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27 views

How to get URL download in Google Earth Engine?

In the below code I want to download PM image using getDownloadURL instead of Export.image.toDrive() but returns error. How can I solve this problem? code link: https://code.earthengine.google.com/...
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29 views

Metadata Error in Google Earth Engine?

In the below code time band doesn't create for merged collection. I don't know why but it returns metadata error: code link: https://code.earthengine.google.com/3827c156af430c2485aedf28f9273206 Map....
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1answer
13 views

Different pixel value between gdalwarp and ENVI classic in MODIS

I succeed running gdalwarp in level 1 MODIS data. The data in : https://1drv.ms/u/s!AjXAWS5maHffhxx_Pf2j2snnXocs?e=ceHHcd When I run gdalinfo, the partial information is like this : $ gdalinfo a1....
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23 views

Google Earth Engine only clipping the boundary of polygon?

My code is var study_area = ee.FeatureCollection('users/new_external_boundary'); var study_area_ = study_area.geometry(); var dataset = ee.ImageCollection('MODIS/006/MCD12Q1'); var igbpLandCover = ...
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Confusion about “alpha” band for MODIS Aqua

I'm working with modis:09:CREFL data for a harmful algal blooms paper, and I am trying to figure out how to call the chlorophyll-a band, which I believe is the "alpha" band, but I'm not sure ...
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12 views

MODIS HEG tool - integerized_sinusoidal projection not supported in swtif for MOD021KM

I tried to use the swtif command line in HEG tool to convert the MOD021KM swath to standard sinusoidal grid. Since the standard sinusoidal projection is not supported in the version of 2.5, I used the ...
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13 views

Seeking Moderate to High Resolution Forest Fire Before and After Images

I'm trying to search through the moderate to high-resolution satellite image data sets for imaging that shows forests both before and after a forest fire in order to assess the burn severity and the ...
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22 views

How to resolve the error while downloading MOD10A2 image using MODIS package in R?

I am trying to download the MOD10A2 image using MODIS package in R However, each time it is failing with following error Error in sf::gdal_utils(util = "warp", source = gdalSDS, destination ...
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2answers
105 views

GRASS GIS: r.in.gdal does not find raster data in .hdf file (modis data)

I'm having trouble in importing MODIS .hdf data in GRASS GIS. When I use r.in.gdal it returns me this error: ERROR: No raster bands found in </Volumes/Maxtor/TESI_satellite_imagery/...
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33 views

MODIS data download issues with runGdal in R

I'm trying to download some MODIS data using the following function, which errors like so: ndvi.evi <- runGdal("MOD13Q1", collection = "006", tileH = 20, tileV = 11, ...
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22 views

No download Option

I am using Modis-13A2 in USGS earth Explorer but I am unable to download its GeoTIFF file because download option is not available kindly guide me. ]1
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51 views

Time Series Extraction of Modis LAI product (every 3 days a new satellite image) in small study area

At the moment I am struggling with a time series and the extraction of MODIS LAI data. I am using the band "Lai" from MODIS/006/MCD15A3H. My study area is small, so presumably, since the ...
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11 views

How to traverse all Landsat 8 pixels in each MODIS pixel space on GEE

I have two scenes of Landsat 8 and MODIS images in a designated area. I want to traverse all Landsat 8 pixels within the space of each MODIS pixel. How should I deal with this?
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30 views

Download global data efficiently from Google Earth Engine

I want to get the GPP of MODIS from Google Earth Engine on a global scale, here is my code. var start_date = ee.Date.fromYMD(2000,1,1); var end_date=ee.Date.fromYMD(2005,1,1); var Date_window=ee....
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15 views

Using MODIS .act file

I previously downloaded a file named modis_lst.act from MODIS land surface temperature page somewhere. It seems to be a pallete (or colormap) thing. How to parse and use this .act file? Or, in other ...
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68 views

Different results extracting data from the same point from MODIS HDF with R

I am trying to extract NDVI data from MODIS HDF files using R. I have several files downloaded from EarthData. The file I am using in this example is here to download. These MODIS HDF files have a ...
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64 views

Get daily mean of AOD from MCD19A2 in GEE

I tried to get daily mean of AOD from MCD19A2 in GEE, but my mean function always returns zero. // function to add date to image collection from system:time_start var writeDate = function(image){ ...
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12 views

Reproject MOD13Q1 in GDAL using the gringpoints

I am working with the MODIS MOD13Q1 vegetation product and the reprojection using gdal is fine, however I wish to be more precise and use the GRING to accurately warp the data into wgs 84(epsg:4326). ...
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1answer
28 views

Making Images in Collection Binary Based on Threshold

I am trying to make every image in a collection into a binary image based on whether it's band's pixel value is higher or lower than a certain threshold. For instance, if an image's pixel in a ...
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19 views

R SPEI package on waterbalance timeseries for multiple locations with NA's: unexpected data output distribution

I want to use the spei() function in the SPEI package on a waterbalance dataset from 2015-2020 of 99 locations. The waterbalance is calculated out of MODIS PET values (8-day summed to monthly) and ...
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1answer
45 views

Percentage value when resampling GEE

I am trying to resample a landsat NDSI image to a MODIS NDSI image. When I run the code below and use the inspector to click on a few random points in the image, it provides the normalized difference ...
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111 views

Right way to compute monthly MODIS Albedo Daily 500m (MCD43A3.006)

I am trying to compute monthly composite albedo from daily MCD43A3.006 product. From the description, it is said that each 500m/pixel daily image is generated using 16 days of data, centered on the ...
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15 views

TIMESAT Quality Data

I am trying to analyse time-series images from MODIS (MOD13Q1) in TIMESAT to clear the noise and get an output. With EVI images I got also QA. I have to use it because there is often a cloud cover in ...
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165 views

Google Earth Engine: Working with imagery with “no bands” --how to select or rename a band

I am trying to perform various operations on MODIS datasets in google earth engine. Every operation I try to perform is prevented by the requirement in code to select a band to work with. This ...
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1answer
54 views

Work with MOD07 - Retrieved Moisture Profile layer - data in R

I downloaded a complete month of daily images of MODIS MOD07_L2 product (Atmospheric profile). I've worked with *.hdf files for really long (using both R and tools such as HEG), nevertheless, I am now ...
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25 views

How to aggregate properly 8-days MODIS ET to a monthly ET?

I am looking for a robust method to aggregate the 8-day MOD16A2 (or MOD16A2GF) ET_500m values to monthly ET. Since ET_500m and PET_500m, are the summation of 8-day total water loss (0.1 kg/m2/8day). I ...
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181 views

How to solve bitwise error in Google Earth Engine?

I've wrote the below code for chlorophyll detection using MODIS ocean reflectance data but I've got this error: Image.bitwiseXor: Bitwise operands must be integer only. code link: https://code....
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122 views

Naming clipped layer according to the attributes of the mask layer in QGIS

I have calculated the dnbr for a fire season across a whole region, and I've clipped it using a mask. The mask is a layer of ground survey plot locations because I want to find out the dnbr for each ...
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60 views

How to Add Vector Overlay to Clipped Image in Google Earth Engine?

I'm creating a clipped composite from MODIS Satellite's NDVI image collection. I need to add a vector overlay representing country boundary to each image in a collection. My current failed attempts: ...
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48 views

Opening HDF files using ArcGIS Pro

I downloaded from the USGS Earth Explorer a MODIS Landsurface Reflectance V6 MODIS MOD09Q1 V6 image to calculate an NDVI. I'm trying to open it on ArcGIS Pro, however when I import the file, the ...
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65 views

How to apply a cloud mask on a MODIS collection in Earth Engine

I am trying to work with the MODIS dataset from google earth engine (MCD43A4.006 MODIS Nadir BRDF-Adjusted Reflectance Daily 500m) and I want to apply a cloud mask but I have no clue how to do it. I ...
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1answer
71 views

GEE converting to feature to geometry for .filterBounds

I am trying to filter a MODIS image collection by country. I have seen a lot of examples where you can map the image collection over a function and clip to the country, but I was trying to simplify ...
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24 views

Exporting NDVI CSV data of a rectangular region

I am using the MODIS MOD13Q1 NDVI in the Google Earth Engine for my thesis project. I created a rectangular region to export CSV data. But I am having trouble exporting the NDVI data associated with ...
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67 views

Easier Way to Record Yearly Mean NDVI

For my Google Earth Engine project, I am finding the mean NDVI for each year between 2000 and 2020 in protected areas a part of the World Database on Protected Areas (WDPA). As an example, I have ...
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1answer
48 views

MODIS burn area - what do the pixels actually show?

I am using the MCD64A1.006 MODIS Burned Area Monthly Global 500m dataset to look at wildfire history over a certain area. I have downloaded the images from GEE and then uploaded them into Arc desktop. ...
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1answer
22 views

Georeferencing bands at first then calculating NDWI, or, calculating NDWI at first and then georeferencing it

I want to get NDWI from MODIS mod021km as GeoTIFF files. As far as you know, MODIS images are not georeferenced and the point is georeferencing these imagages is a little bit inaccurate (because of ...
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21 views

Aggregating multiple time series to match MODIS timestep in R

I have multiple time series data for precipitation and evapotranspiration that are irregularly spaced. All but one of the datasets are daily products, but sadly one is a MODIS product that has ...
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1answer
149 views

How to clip GEE MODIS burnt area collection

I am using the MODIS Burned Area Monthly Global 500m product in GEE. I would like to export the information in a .tiff file for a designated area, which I have imported into GEE as a shapefile. The ...
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11 views

How to merge MODIS AOD L2 data to L3

I'm working with MODIS AOD L2 data and would like to create daily averages and monthly averages from the data. I'm aware of the L3 product but it doesn't allow me to create an 18 day average of just ...
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39 views

Mismatch between GPS points and data layer at high latitude

I am currently working on animal movement, based on GPS animal-attached device, at high latitude (north-east corner of Greenland, between 80° and 82° north). I observe an important mismatch between ...
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2answers
37 views

Analysing many MODIS AOD tiles on the same map

I wish to analyse several days' worth of Aerosol Optical Depth retrievals from (MYD04_L2) data over the Atlantic Ocean. I have limited experience of using GDAL, but only analysing a single MODIS tile ...
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49 views

How can convert daily MODIS NDVI to monthly of them in Google Earth Engine?

The link of code: https://code.earthengine.google.com/71d9f6ea42ee55b4e18d2adf22d9e678 As a result, I have to have 96 bands in the stack image so that the ID of each band returns the date associated ...
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1answer
45 views

How is a GeoTIFF geographically referenced if it has no sidecar files?

I am currently downloading MODIS burned area fire products to use for a work project. One of these products is a GeoTIFF which indicates the day (Julian date) of the year when an area experienced fire....

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