Questions tagged [modis]

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

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54 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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8 views

MODIS data failure [closed]

I'd like to get MODIS-Aqua SST (sea surface temperature) data from Google Earth Engine (december-january), but these data are not available for download. What is the reason? Meanwhile these data ...
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30 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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189 views

Growing Season Length in Google Earth Engine?

I am trying to estimate growing season length with the MCD12Q2 dataset (Land Cover Dynamics Yearly L3 Global 500 m), which includes dates for the start and end of the growing season (...
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15 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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43 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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17 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 ...
3
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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-...
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1answer
63 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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1answer
344 views

Opening MOD17A3 in ENVI so it is properly georeferenced?

I am using ENVI 5.1 on Windows 8. I am trying to open a MOD17A3 (MODIS Net Primary Productivity standard product - L4) .hdf file which I downloaded from the USGS website. I am still a beginner at ENVI,...
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0answers
45 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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3answers
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 ...
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1answer
92 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 ...
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1answer
29 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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1answer
202 views

Calling MRT Swath from IDL

Do you know how to call MRT Swath from IDL? I would like to work with Modis L1B (MOD02HKM), read it, reproject, some processing and writing the results.
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1answer
180 views

Using BFAST Spatial algorithm in R?

I have 65 monthly MOD11A2 (LST) images. The images came from the average of the original 8 day products. I have made them a time series stack using the timeStackMODIS function of the bfastSpatial ...
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0answers
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 ...
1
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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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0answers
11 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?
3
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1answer
163 views

MODIS L1B reprojection and mosaic problem

I have been using MODIS L1B file to retrieve water vapor content. However, my study area is exactly between the gap between two images,just like this: I have tries ENVI MCTK extensions, HEG TOOLS, ...
1
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1answer
44 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
30 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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1answer
6k views

Reprojecting MODIS Swath data to WGS84 using GDAL [closed]

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 ...
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0answers
27 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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0answers
30 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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1answer
90 views

Make a loop in Google Earth Engine for reduce NDVI from year a months?

I have this code, it generate N ImageCollection and for each image a chart from NDVI in function a the months This is the place of study: var areaEst = ee.FeatureCollection("users/aleszczuk/...
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0answers
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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0answers
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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2answers
76 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
338 views

Get a mask for MODIS (250m, MOD09GQ) using MODIS (500m, MOD09GA) in Google Earth Engine?

How can I use the quality information stored in MODIS (500m) to create a mask for my MODIS (250m) image - e.g. cloud mask? When I merged the two image collections and run a function to detect the ...
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1answer
238 views

Is MODIS sinusoidal tile boundary in Eathdata website real?

I was using MOIDS data MCD12Q1 (MODIS/Terra+Aqua Land Cover Type Yearly L3 Global 500m SIN Grid V00). I try to use PyProj in Python to transform the Sinusoidal projection to lat/lon. It actually ...
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1answer
83 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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0answers
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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11 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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0answers
48 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 ...
4
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1answer
1k views

R package gapfill: How to convert R raster stack to 4-dimensional array and then back to raster stack?

I'm currently analyzing MODIS EVI time series (MOD13Q1) for a small region between 2000 and 2015. Now, I would like to fill missing values using the new R package gapfill. What I have done so far: ...
3
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1answer
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 ...
0
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1answer
63 views

Using MODIS metadata in R

I am working with MODIS 1b Data in R, and converted the HDF files into tiffs. They load and plot correctly. I am now trying to convert the values of corrected_counts_scale and ...
4
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1answer
348 views

Getting tile number of sinusoidal MODIS product from lat/long?

I'm using this tool to get the tile number (horizontal/vertical) from lat/long. Is there any code,preferably python, to get the tile number ? I tried using this tool. But it gives wrong tile number. ...
0
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1answer
30 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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1answer
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?
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0answers
34 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 ...
4
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1answer
143 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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0answers
14 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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0answers
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 ...
2
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1answer
162 views

Which output data type to choose in QGIS SAGA Raster Calculator in Batch Mode?

I have 5 years of MODIS13Q1 NDVI .tiff images for time series analysis. I want to multiply all the images with the scale factor of 0.0001 before using them. In order to process all at once I try to ...
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2answers
148 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 ...
2
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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") ...
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0answers
33 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 ...
1
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1answer
36 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 ...