The Stack Overflow podcast is back! Listen to an interview with our new CEO.

# Questions tagged [modis]

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

449 questions
Filter by
Sorted by
Tagged with
305 views

### Chart Series By Region in Google Earth Engine?

I've wrote a code for modis ndvi timeseries(code below). But it returns error in chart creating (ui.Chart.image.seriesByRegion) : Error generating chart: Invalid argument specified for ee.Number(): ...
776 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) ....
229 views

### How to calculate the Min & Max value for a pixel from multiple Raster Images?

I have downloaded a Bunch of MODIS MOD13Q1.006 Images for my Study Area, covering a period of 4 years (same scene across time). Now I want to calculate the Min & Max NDVI value for each Pixel, so ...
13 views

### Does Modis offer MultiYear statistics?

I'm trying to calculate the VCI data for my entire State. I'm using MODIS's 16 day NDVI Average. From this post, I see that I would need to calculate the Min & Max NDVI values for each pixel ...
121 views

### EVI2 value calculated from MODIS MOD09Q1 not bounded by -1 to 1

I'm trying to derive from MODIS 8 day composite MOD09Q1.006 product My formula follows the standard interpretation: EVI2 = 2.5(NIR-Red)/(NIR + 2.4*Red+1) I already know that MODIS bands for NIR ...
381 views

I am trying to get a full-functioning download script specifically for the Modis data (Version 6) on the USG/NASA site (AppEEARS/LPDAAC). I’m running Windows 10. I know that there is an R Modis ...
157 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 ...
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 ...
74 views

### Is the resolution of MYD13A2/MOD13A2 ( MODIS 16 day 1km Global Vegetation Indices) erroneous in Google Earth Engine?

The MODIS vegetation indices collection shows a resolution of 111319.4 metres in Google Earth Engine when, in fact, it should be 1000 metres. Below is my code: var Veg = ee.ImageCollection("MODIS/...
312 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 ...
2k views

### Image collection to Single Image in Google Earth Engine

I'm stuck with an issue in google earth engine. I'm working with MODIS Burned Area Monthly Global 500m, for a certain polygon area: var MOD = ee.ImageCollection('MODIS/006/MCD64A1'); var MOD1 = MOD....
141 views

### Dimensions of images given their latitude and longitude for Google Earth Engine

From the point long: 16.499050771335575, lat: -30.882 I want to find the corresponding latitude and longitude values that would result in a 200 km by 200 km square in which the aforementioned ...
1k views

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, ...
480 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. ...
29 views

### Geolocation of L2G-Lite MODIS data

I would like to know if I am processing an L2G-Lite MODIS product, do I still need to geolocate, or reproject it to EPSG:4326? Or can I just leave it?
42 views

### Opening MODIS Raster MOD13Q1 .hdf file comes in as Float32 instead of 16-bit signed integer

Trying to open a MODIS 16 day composite NDVI raster from the .hdf file. After selecting just the NDVI band, QGIS nicely displays the image. However, on this image the range of values is between -3....
70 views

### How Do I search for MODIS data using pyModis?

I want to download the latest Modis vegetation Index Data(MODIS/Terra Vegetation Indices 16-Day L3 Global 250m SIN Grid V006) , whenever it is available for my Study Area. I know the Tile that my ...
55 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 ...
2k views

### Earth Engine memory capacity exceeded

I want to generate time-series MODIS images of a small area (10x10km) via Google Earth Engine from 2000 to 2017. I generate the clipped image collection easily and then export each image individually ...
89 views

### Reclassify raster based on cell location and value

I am working in ArcGIS 10.5 (with the spatial analyst extension); I'm relatively inexperienced but I understand what I am trying to do, just need some help on how to accomplish it. I am working with ...
984 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 ...
182 views

### What Python libraries can I use to georeference standard MODIS products?

I want to create georeferenced standard Swath MODIS products (for example, MOD02QKM hdf files) using Python. What Python libraries can do this?
69 views

### Creating Maximum-Value Composite of MODIS images using QGIS

I am trying to create a Maximum-Value composite of 4 MODIS images that are in .hdf format and I tried with 'Raster Composite' of ArcGIS but I think that's not the appropriate to do it. Can I do it ...
76 views

### MODIS LST maximum value composite

I am using eight day composite MODIS LST data MOD11A2. How do I make a monthly composite from four 8-day composite data taking the maximum value out of four in the output raster? Initially I went for ...
940 views

### Extracting values at specific latitude,longitude from MODIS swath data

I am trying to determine the amount of precipitable water vapor (PWV), ozone and aerosols as a function of time over specific spots on the Earth, namely our astronomical observatories. To do this, I'...
107 views

### MODIS 04_L2 projection transformation

Trying to extract MODIS Deep Blue Aerosols from a number of years. I have managed to open the HDF files in QGIS and ArcMap; however, have failed to reproject out of the sinusoidal grid so that the ...
81 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 ...
69 views

### Google Earth Engine: Same geometry different Areas (PERSIANN-MODIS)

I was trying to count the number of pixels that are inside my ROI and differs quite a lot one image from the other. For MODIS image I get a total of 265533 pixels (500x500) spatial resolution and ...
299 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 ...
274 views

### Median image of merged image collections

Following this example I have merged 2 image collections to create a synthetic twice daily Aqua and Terra composite. Now I want to generate the median image of this combined collection. For a single ...
171 views

### Batch reprojecting large number of MODIS files

I am currently trying to reproject a large number (~14.000) of .hdf - files from MODIS Aqua/Terra from MODIS sinusoidal to something more popular (e.g. WGS1984). The files can be obtained from LAADS. ...
335 views

### Change pixel size of MODIS in GEE

I am trying to perform some scale-tests with some data on GEE. I have the following code where I use the MODIS-NDVI dataset at 500m. What I want to do, is to perform the same analysis but on 25000m x ...
204 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 #########################...
47 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/...
42 views

### How to Substract one image band from the subsequent in Google Earth Engine?

i am trying to find the day of year (doy) for each year with the highest change in NDVI compared to the day before, to map in the end a shift in start of season. My code to seperate each year so far (...
285 views

### Merging Aqua + Terra MODIS image collections

I run into an error when merging 2 image collections. Goal: I want to merge the (identical) 250m daily Terra and Aqua MODIS collections into one image collection to obtain one collection with 2 ...
274 views

### MODIS surface water and cloud shadow

I am trying to set up a daily water and cloud detection system and need to use a high temporal resolution. Therefore I intend on using daily MODIS imagery (MOD09GQ). In the water detection, cloud ...
63 views

### MODIS Landsat overlapping

I have two Lands Surface Temperature images, one from Landsat 7 and the other one is from MODIS, both for the same day. After projecting MODIS to UTM WGS84 the two images are slightly shifted, i.e. ...
323 views

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", ...
90 views

### Whether Sentinel 3 OLCI can be used as a MODIS replacement for 250m NDVI?

Based on the bandwidths MODIS bands 1 and 2 (620nm - 876nm) will match S3 bands Oa7 - Oa17 (620nm - 865nm) I am just trying to know if anyone had any experience in using S3 data instead of MODIS for ...
87 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(...
261 views

### Add a list of dates as an image properties in Google Earth Engine? [closed]

I've merged two image collections after calculating median values by month in each collection from 2000 to 2018. However I need to carry out an operation that needs the "sytem:time.start" field that ...
729 views

### Google Earth Engine: How to calculate regular day interval means in image collections, maintaining “system:time.start” field?

I've merged three Landsat collections in Google Earth Engine, now I need to calculate median values at regular time intervals, let's say 32 days, because I will create a collection to join with MODIS. ...
110 views

### Error in .getModisList(x = xx, h = h, v = v, dates = dates, opt = opt, : No available data for the selected dates

I have a problem using ModisDownload from RTS Package on R, i always have the same error using ModisDownload or getMODIS functions : Error in .getModisList(x = xx, h = h, v = v, dates = dates, opt = ...
27 views

### GRASSGIS Batch Process Command Not Running

I'm trying to rescale MODIS LST data by running the following command but it gives this error (Image Attached) Kindly help if the syntax is not right. Command: for %i (*MOD11A1.A2000065.LST_Day_1km*...
262 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 ...
166 views

### Understanding measurement units for MODIS data?

I am working on MODIS data in ESA SNAP, specifically the Terra sensor, and I'm having a hard time understanding the unit of measurement of the data provided. I have downloaded Level 1B data (...
478 views

### Cloudless days count with MODIS in Google Earth Engine

I'm trying to estimate the total of clear days in a year with the help of state_1km band in the MOD09GA product. But I'm not sure if it is right, also the possible counts are higher than expected when ...