Transcript How to MODIS Images - Bangladesh University of

How to Download MODIS
Images
Dr. A.K.M. Saiful Islam, IWFM, BUET
Dr. Sujit Kumar Bala, IWFM, BUET
Mr. M. Golam Mahboob, BARI
December 2007
MODIS Web site
http://modis.gsfc.nasa.gov/
Discipline
• We are mostly interested
in Land and Atmospheric
data
MODIS Vegetation Indices
http://modis-land.gsfc.nasa.gov/vi.htm
MODIS/Terra Vegetation Indices
16-Day L3 Global 250m SIN Grid V005
EDG Data Set Name
ShortName
MODIS/Terra Vegetation Indices 16-Day L3
Global 250m SIN Grid V005
MOD13Q1
Versi
Acquisition Range
on
Science Quality
Status
003
August 29, 2002 –
October 7, 2002
Provisional from
11/01/2000
004
February 24, 2000 –
December 31, 2006
Validated Stage 1 from
04/06/2000
005
February 24, 2000 -
Validated Stage 2 from
02/18/2000
MODIS NDVI and EVI
Data Characteristics
• Area: ~10 degrees x 10 degrees lat/long
Dimensions: 4800 x 4800 rows/columns
File Size: ~ 5 - 270 MB
Resolution: 250 meters
Projection: Sinusoidal
Data Format: HDF-EOS
Science Data Sets (SDS HDF Layers): 12
Product Description
• Global MODIS vegetation indices are designed to provide consistent
spatial and temporal comparisons of vegetation conditions. Blue,
red, and near-infrared reflectances, centered at 469-nanometers,
645-nanometers, and 858-nanometers, respectively, are used to
determine the MODIS daily vegetation indices.
• The MODIS NDVI and EVI products are computed from
atmospherically corrected bi-directional surface reflectances that
have been masked for water, clouds, heavy aerosols, and cloud
shadows.
• Version-5 MODIS/Terra Vegetation Indices products are Validated
Stage 2, meaning that accuracy has been assessed over a widely
distributed set of locations and time periods via several ground-truth
and validation efforts. Although there may be later improved
versions, these data are ready for use in scientific publications.
Download
Retrieve the MOD13Q1.5 MODIS product through the
1. LP DAAC Data Pool
2. Via Search Tool:
http://e4eil01u.ecs.nasa.gov:22000/WebAccess/drill?attri
b=esdt&esdt=MOD13Q1.5&group=MOLT
3. Via FTP Directory:
ftp://e4ftl01u.ecs.nasa.gov/MOLT/MOD13Q1.005/
4. Order Data through the EOS Data Gateway
(http://edcimswww.cr.usgs.gov/pub/imswelcome/)
•
EOS Data Gateway Search Tips
Data Center:LPDAACSensor:MODISDataset:MODIS/Terra Vegetation
Indices 16-Day L3 Global 250m SIN Grid
V005Spatial:HORIZONTALTILENUMBER Max/Min VERTICALTILENUMBER
Max/MinGeographic Extent:Type Lat/Long Range or Draw on MapTemporal
Extent:2000-02-18 to present
Order Data through the EOS
Data Gateway
http://edcimswww.cr.usgs.gov/pub/imswelcome/
Please register and create
your own account
Enter as Registered User
• After registration
Enter the site as
registered user
Primary Data Search Tool
By Discipline
Choose Data set
16-day global 250m Sin grid V005
Spatial Coverage
• For Bangladesh entire Dhaka coordinates
Temporal coverage
• Select Date and time
Annually Repeating Time Period
• Julian data January to March (001 to 090)
• From 2000 to 2007
Additional Search Options
• Thermal data : you may select day or night
You can change from default 100 to desire no of data granular
Each year 6 (16 day) x 8 years (2000-2007) = 48 data version 005
Start search
• First Save Your search
and save as file
• You can also restore
search
• Finally start search
Search in progress
• Will show partial results
List result data set
• Click on List data granules
Click on Box
Listing Data Granular
• Select All data and items selected in all pages
Show Map coverage
Zoom Spatial coverage
• North part of Bangladesh is in another
spatial coverage
Add selection to Cart
Choose order option
Choose order option
• Select FtpPull
Every data granule
Click on OK!
Order as FTP Pull
• Go to Step 2: Order form
Review order form
• At the end of the order form
• Please click on Go to Step 3: Review
order summary Before submitting order
• OR, you can directly Submit Order Now!
Order summary
Click on submit order
Billing
Data summary
Order submitted
• You will receive an email of order notification
• That’s it!
• It takes 2 hours to 2 months !
Thank you!
Questions