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

learn more… | top users | synonyms

2
votes
1answer
295 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 ...
0
votes
1answer
201 views

Better way to handle HDF and GeoTIFF files

I am using GDAL and MODIS reprojection tool in my python project and want to know better way for math new indices of HDF data (MODIS data). Also I want to visualize them in web. Which format is more ...
4
votes
2answers
278 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 ...
0
votes
1answer
403 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 ...
1
vote
0answers
43 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 ...
2
votes
2answers
213 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
716 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 ...
2
votes
1answer
123 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 ...
3
votes
3answers
269 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 ...
0
votes
1answer
59 views

Precipitation or snow cover raster data for Scandinavia

I am looking for free precipitation or snow cover data in Scandinavia mountain during the winter 2011-2012. The WorldClim dataset is not enough acute. I would like 500 m scale at least. There is ...
3
votes
1answer
1k 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 ...
1
vote
1answer
139 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?
3
votes
1answer
2k 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 ...
0
votes
2answers
181 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 ...
2
votes
2answers
359 views

How to detect burned areas from Landsat or MODIS datasets using ILWIS?

I'm trying to find a simple tutorial on how to detect and map burned areas from/with ILWIS . I use Landsat 5/7 or MODIS for detection. Any idea?
0
votes
1answer
425 views

Format MODIS HDF to Geotiff in MRT

Am using Modis Reprojection Tool (ModisTool) on MODIS LST data (MOD11A1) to convert to GeoTiff format. When I run it I get this error message: Error: OpenGeoTIFFFILE: Opening Output Image File ...
3
votes
3answers
872 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 ...
2
votes
2answers
195 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
0answers
210 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 ...
2
votes
1answer
439 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
0answers
172 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 ...
3
votes
3answers
589 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
1answer
213 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
330 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 ...
2
votes
2answers
316 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.
0
votes
1answer
134 views

MODIS LDOPE mask_sds Error

I am using the LDOPE mask_sds tool to mask a MODIS image based on the quality flags for MOD13A3 NDVI. The full command that I am using is: mask_sds -of=mask.hdf -fill=-3000 -sds='1km monthly NDVI' ...
1
vote
0answers
106 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 ...
1
vote
1answer
222 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
1answer
405 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 ...
0
votes
1answer
672 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 ...
1
vote
2answers
836 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 ...
4
votes
1answer
89 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 ...
0
votes
2answers
157 views

Is there any method to create monthly LST images?

Is there a method to create monthly LST images from combining MOD11A2(8days) product? The MOD11C3 product which is delivered monthly has larger spatial resolution than MOD11A2. Im trying to create a ...
3
votes
2answers
737 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 ...
2
votes
1answer
744 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
2answers
716 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 ...
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
1answer
315 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 ...
6
votes
4answers
117 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 ...
3
votes
1answer
359 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 ...