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

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8
votes
2answers
391 views

How do you explain that band width and relative spectral response of MODIS band do not match?

To define relative spectral response, I referred to EFFECT OF RELATIVE SPECTRAL RESPONSE ON MULTI-SPECTRAL MEASUREMENTS AND NDVI FROM DIFFERENT REMOTE SENSING SYSTEMS by David James Fleming, 2006. ...
6
votes
4answers
115 views

Identifying geographies that match certain climatic profiles through GIS

A certain post-haste project has arisen, and I would like to put this question to the collective mind of GIS.SE for ideas and references. The long and short of this research is trying to find roads ...
4
votes
2answers
219 views

What does MODIS data reflectance values (MOD13Q1) mean?

Several publications suggest filtering MODIS data (in my case MOD13Q1) prior to use. They recommended to filter out pixels having blue reflectance more than 10%, but what 10% here means? is it 10% of ...
3
votes
3answers
504 views

climatic data from MODIS or other sources

I'm looking for climatic information in the form of raster like MODIS daily LST (Land Surface Temperature) data. I'm looking for other parameters like precipitation, humidity, air pressure and so on. ...
3
votes
2answers
60 views

Download MODIS data for Mexico

I would like to download MODIS npp images for Mexico but I cannot figure out which files correspond to the country. How can I associate each tile to its location without looking at the million of ...
3
votes
3answers
321 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 ? ...
3
votes
1answer
561 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 ...
3
votes
1answer
964 views

processing MODIS hdf files with gdal

I'm trying to open an MODIS file (hdf format) with gdal in a python script under windows OS. I use the HDF4 driver, as read at http://www.gdal.org/frmt_hdf4.html. But when I run it I got this error ...
3
votes
1answer
79 views

What proportion of the 240m area sensed by MODIS must be forest before it is defined as forest?

MOD12 is a MODIS product at 240m resolution. Landsat produces 30m resolution products, which I resampled to 240m resulting in a raster of proportion forest cover in each 240m pixel (based on the mean ...
3
votes
2answers
2k 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
3answers
183 views

How to efficiently export specific files from .hdf to .img

I am working with MODIS .hdf grid files and am looking for some help on exporting specific files from the .hdf. There are 200+ .hdf's and I need to extract the 0, 1, 2, and 11 (NDVI, EVI, quality, and ...
3
votes
2answers
665 views

How to study qgis generated tiff images for water flow/resources ?

I am new to qgis. I have created tiff images from modis data using qgis. I want to study the water flow/resources from those images. As I am new to this field I don't understand how to study those ...
3
votes
1answer
339 views

Converting dataset between coordinate systems

I'm working with NOAA's PRECipitation REConstruction over Land dataset, and am looking for an efficient way to sample the data by pixels on NASA's MODIS grid, using open source tools. The PRECL data ...
3
votes
1answer
1k 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 ...
3
votes
1answer
296 views

To determine phenological events based on Greatest increase NDVI appraoch

I have a problem with a phenological study. The study area is in temperate zone of Asia. I have been doing phenological research using MOD VI product. I wanted to extract phenological events ...
3
votes
3answers
749 views

MODIS image reprojection/ change coordinate system in ArcGIS 9.3

I have downloaded Utah state shapefile in NAD_1983_UTM_Zone_12N projection and also downloaded the MODIS image of the area (MOD09Q1) in .hdf format which has sinusoidal projection. the .hdf format ...
3
votes
1answer
196 views

MCD43A3 MODIS products

I have MCD43A3 product and I am using that to get the albedo values(Black sky and White Sky). I have some in-situ snow depth data, corresponding to which I want to get these albedo values. For most ...
3
votes
1answer
284 views

Calculate Blue sky albedo from Black sky albedo and White sky albedo

I have got values for Black sky albedo and white sky albedo, from MODIS imagery. What is the simplest way to calculate blue sky albedo? I want to use albedo for snow cover. A website which has listed ...
3
votes
0answers
160 views

How to merge SeaWiFS and MODIS data or use other merged products?

I hope to produce a time-series for sea surface temperature (SST) and chlorophyll-a (Chl-a) for use in MaxEnt without the use of arcgis, preferring Python tools to others. I am new to satellite data ...
2
votes
2answers
182 views

MODIS calculations with non cloud contaminated pixels

I have 11 files showing 8day daytime LST temps in .tif format from MODIS. Is there any way to calculate the average 8day daytime temperature for march 2013 for example but using in the calculations ...
2
votes
1answer
694 views

How to make a cloud mask from a daily MOD09 image?

I'm currently working with MODIS data and i've been having some trouble with several aspects of the steps I need to take. For example, I need to make a cloud mask from a daily MOD09GQK image, and i'm ...
2
votes
1answer
232 views

Modis Reprojection Tool mirror or download alternative?

I need to convert and reproject a complete archive of MODIS *.hdf data. NASA's Modis Reprojection Tool is literally designed for this, and I even have an old script from the last time I performed ...
2
votes
1answer
384 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, ...
2
votes
2answers
331 views

Automatically download Modis image using python script

I need download Modis imagery automatically from the website: https://earthdata.nasa.gov/. I found this link: http://gis-techniques.blogspot.com/2010/06/getting-modis-image-automatically-from.html ...
2
votes
1answer
111 views

Reproject gif.gz raster to WGS84 in QGIS

I am a steep learning curve into QGIS. I have a raster of global fire maps from the modis site: http://lance-modis.eosdis.nasa.gov/imagery/firemaps/firemap.2013221-2013230.8192x4096.gif.gz I would ...
2
votes
1answer
147 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 ...
2
votes
2answers
284 views

Batch process of GDALWARP in FWtools

I am using FWtools for pre processing of time-series MODIS data, I want to mosaic series of two scenes. But I don't know the batch code for gdalwarp. I am using windows. Kindly help me out.
2
votes
2answers
673 views

Reading MODIS L1B into ENVI

I am working with MODIS Terra (and simultaneous ASTER) Level 1B swath data using ENVI and am having one of these "this should be easy" questions about the most direct way to get to geo-referenced ...
2
votes
0answers
72 views

Flood extent extraction from satellite images

How i can extract the floodwater from satellite images? Is the image classification method accurate for moderate-resolution satellite (Terra/Aqua MODIS)? Or is there a more accurate methods? Thanks.
2
votes
1answer
135 views

How do I select random points within each land-cover class? [closed]

I have a MODIS file and I want to Select random points within each land cover class Extract values of rasters to the sample points. Export attribute table Could you please tell me what steps I ...
1
vote
1answer
462 views

How to process MODIS ndvi data using QGIS/GRASS/R?

I have MODIS ndvi data (MODIS_Grid_16 days NDVI) from the iberian peninsula (3 tiles), from February of 2000 to August of 2012 (really big data). I want to know how to deal with this kind of files. My ...
1
vote
1answer
66 views

problems of display modis ndvi with TIMESAT

I use MODIS MRT tool mosicia tow tiles MODIS NDVI data, then use TIMESAT image view to display the mosaic data, encounting file size waring : and after drawing data, the sequences of two tiles is ...
1
vote
2answers
98 views

Getting started with 'shell scripting loops' in GRASS

I'd like to work through the MODIS-Aqua example here. But typically the hardest bit is getting off the ground. What specifically does it mean by 'shell scripting'? is it referring to the command ...
1
vote
1answer
362 views

How to calculate an hypsographic curve of a raster trhough a DEM

I am using Arcgis 10.1. I have a MODIS raster from the NSIDC website with a pixel resolution of 500 m and an attribute table with the fields 'VALUE' (as the code of snow, clouds, etc.) and 'COUNT' (as ...
1
vote
1answer
529 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 ...
1
vote
1answer
127 views

Importing MODIS LST data from MRT in ENVI

I am doing a project on heat island effect using MOD11_A2 data. After processing in MRT I have separate bands. While importing them into ENVI, which bands should I select in the RGB option?
1
vote
1answer
201 views

arcgis python window VS pywin32

I have problems while using the ZonalHistogram function in Python. It seems to give strange results, while, with the same code run in arcgis' python window everything works fine. I am trying to study ...
1
vote
2answers
727 views

MRT (MODIS Reprojection Tool) error: 'Input file does not exist'

EDIT: Solved, see my answer. I've downloaded 8 MOD44B granules from Reverb (using the FTP script method), and am trying to use MRT to mosaic them. I'm falling at the first hurdle though - when I add ...
1
vote
1answer
38 views

Lat/lon of pixel inside Landsat scene

How do I find the lat/lon of each pixel inside a landsat scene. Either the equations for converting i,j to lat/lon or just a bunch of files, one for each scene. Background: I have downloaded a bunch ...
1
vote
0answers
66 views

problem of using TIMESAT to processing MODIS NDVI

I want to use TIMESAT software to analyse time series MODIS NDVI data. Firstly, I use MRT tool to mosaic,subset and project MODIS NDVI data and output data as GEOTIFF format, and save as ENVI standard ...
1
vote
0answers
43 views

How to select MODIS pixels with 80% homogeneous landcover from landsat classification?

I have a complex landcover classification for a landsat scene at 30m spatial resolution. Includes about 600 land cover classes. There is a fair amount of clumping per group. I have a MODIS EVI 16 day ...
1
vote
0answers
53 views

carbon sequestration using NDVI [closed]

For my project I need to map areas of major carbon sequestration using NDVI. The plan is that areas that have a high NDVI value (which stays high over seasons and over years) could be identified as ...
1
vote
3answers
68 views

What is meaning of Emissive in ENVI?

When I view MOD02 data in ENVI directly with ... File--Open image file, ENVI automatically loads data. So what is the meaning of Emissive? The description of MOD02 data can be found in MOD 02 - ...
1
vote
0answers
70 views

Why does GDAL Translate not create any output in batch mode?

Has anyone tried using the Batch Mode function in GDAL translate - qgis2? I can process files individually ok, in my case MODISA HDF files. But the batch mode does not seem to work. Here is my set ...
1
vote
0answers
40 views

MOD11A2, falsely negative nightly LSTs

I am having troubles with extracting data in ArcGIS buffer extractions from the MOD11A2files after processing them into GEOtiff, most of them seem fine but when looking at nightly temperature on some ...
1
vote
0answers
164 views

Question for MOD35 cloud mask

I have a question about processing MOD35 cloud mask image. I worked reprojection on MOD35 cloud mask image using MODIS Swath Tool. The processed results of MOD35 cloud mask are consist of 6 band ...
1
vote
0answers
103 views

Regarding MCD43 products

I have a special MCD43 daily product with 250 m resolution in .hdf format. Whenever I try to open it in the MODIS Re projection Tool, the error i get is "error in module:read hdr file". What should I ...
0
votes
1answer
269 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 ...
0
votes
1answer
601 views

MRT (MODIS Reprojection Tool) input error

This is my first time to use Modis Swath Tool to deal with images. I've downloaded 4 MOD44B granules (using the FTP script method), and am trying to use MRT to mosaic them. When I add the 2 files I ...
0
votes
2answers
167 views

Handling MODIS NoData cells with gdalwarp

I'm using the gdalwarp tool to convert MODIS .hdf into GeoTiff files. I want to set the value of the nodata cells so that when I import the .tif image into Grass there is no black edge. I'm using the ...