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1、ASTERASTER数据下载方法数据下载方法.ppt.pptASTER L1B Content Change on the LP DAAC Data PoolEffective May 24, 2006, the LP DAAC Data Pool ASTER_L1B.003 data holdings will be modified to include only the improved ASTER_L1B On-Demand product. Also, an initial modification of the Data Pool will leave only Level-1B
2、data produced after February 08, 2006. The Data Pool will be repopulated with scenes over the United States and its territories until it holds all Level-1B data for the past two years. At that point, a 2-year rolling Level-1B collection will be maintained with data older than 2 years being removed.F
3、or more information on the improved ASTER_L1B On-Demand product, please visit http:/lpdaac.usgs.gov/news/news_aster_051506.asp.2IndexLP DAAC Data Pool Overview and Data TypesSearch and Order OptionsASTER & MODIS Search and OrderMODIS Search and Order*Direct FTP AccessASTER Direct FTP AccessMODIS Dir
4、ect FTP AccessLP DAAC Contact Information* You may use may use the MODIS Search and Order section to submit a search based on MODIS tiles.3OverviewThe Data Pool is an online archive providing direct FTP access to selected LP DAAC data products. The Data Pool contains ASTER L1B V003 data covering the
5、 US and its territories and global MODIS data.MODIS daily products are retained for 4 days; all others are retained for at least 12 months.ASTER products are retained for two years.4Overview (cont.)You may search the Data Pool by using a simple “Drill-Down” web interface to quickly locate data of in
6、terest.The Data Pool also offers immediate FTP access to selected LP DAAC data products.You may view Metadata and browse data (if available) through your browser.5Available ASTER Data TypesASTERThe LP DAAC Data Pool contains Version 3 L1B Registered Radiance at the Sensor (AST_L1B) granules over the
7、 United States and its territories only.ASTER L1B data downloaded from the LP DAAC Data Pool is available without charge.6Available MODIS Data TypesMODIS Aqua & TerraThe temporal extent of MODIS data varies according to data type.MODIS daily data are available for up to 4 days; MODIS composite data
8、are available for approximately 1 year.MODIS Datasets available7Data DeliveryMODIS and ASTER data ordered through the LP DAAC Data Pool are disseminated by FTP only.Search and Order OptionsIndexMODIS granule of drought conditions in Southwest Australia 8Search and Order OptionsLP DAAC URL: http:/lpd
9、aac.usgs.gov/main.aspBegin your data search at the LP DAAC homepage: Click the “Data Pool” link to go to the LP DAAC Data Pool.9Search and Order Options (cont.)Data Pool URL: http:/LPDAAC.usgs.gov/datapool/datapool.aspTo search the LP DAAC Data Pool: Click the “ASTER & MODIS” button or the “MODIS” b
10、utton located under “Search”.NOTE: Searching the Data Pool is also referred to as the “Drill-Down Method.”10Search and Order Options (cont.)Drill-Down Search ParametersSpatial Coverage through a java mapPan and Zoom to your area of interestUse rectangle or polygon spatial extent options to cover you
11、r area of interestDate options availableDate selection links are available for day, week, month and yearDay/Night FlagScience_QA (Quality) FlagNote: At any time, the search options may be skipped and you can retrieve the granules matching the current criteria.11Search and Order Options (cont.)Please
12、 use the links below for LP DAAC Data Pool Search and Order Instructions for either the ASTER & MODIS button or the MODIS button: ASTER & MODIS MODISASTER L1B granule of Dell Rapids, South DakotaIndex12ASTER & MODIS Search and OrderData Pool URL: http:/LPDAAC.usgs.gov/datapool/datapool.aspTo begin y
13、our ASTER or MODIS Search and Order: Click the “ASTER & MODIS” button located under “Search”.NOTE: Searching the Data Pool is also referred to as the “Drill-Down Method.”13ASTER & MODIS Search and Order (cont.)The data sets are organized by data group names. Select your desired instrument by using t
14、he links located in the “Data Group” column.14ASTER & MODIS Search and Order (cont.)To begin your ASTER Search and Order: Select the ASTER instrument from the link in the “Data Group” column. Select the AST_L1B.3 link in the Data Set column.15ASTER & MODIS Search and Order (cont.)Using Spatial Const
15、raint OptionsOption 1:Select areaof interestfrom mapOption 2:Select area of interest usingcoordinates16ASTER & MODIS Search and Order (cont.)OPTION 1: Select area of interest from the map. Use layer boxes to display map features. Use zoom feature to view map up to 30 km. Use “Pan” and “Pan&Zoom” fea
16、tures to rotate map and see greater detail. Use “Select Rectangle” and “Select Polygon” features to select your area of interest.17ASTER & MODIS Search and Order (cont.)OPTION 1: Select area of interest from the map. Use the “Select Rectangle” feature to click and drag a rectangle over your area of
17、interest. Use the “Select Polygon” feature to click points around your area of interest. Once you have selected your area of interest, click the “Add Selection to Search” button.18Option 2: Select area of interest using coordinates. Enter your coordinates of your area of interest to create a boundin
18、g rectangle. Once you have selected your area of interest, click the “Add Selection to Search” button.NOTE: Remember to include a “-” (hyphen) in front of longitude coordinates in the Western Hemisphere and latitude coordinates in the Southern Hemisphere.ASTER & MODIS Search and Order (cont.)19ASTER
19、 & MODIS Search and Order (cont.)To select a date or a date range: Use the links to select day, week, month, and year. Use the drop down boxes under “Select a Date Range” to select a start date and end date. Click the “add it to your search criteria” button after selecting the date range.20ASTER & M
20、ODIS Search and Order (cont.)To select a time or a time range: Use the links to select the time of the day. Use the drop down boxes under “Select a Time of Day Range” to select a start time and end time. Click the “add it to your search criteria” button after selecting the time range.21ASTER & MODIS
21、 Search and Order (cont.)Selecting the Day/Night Flag: The Day/Night Flag can be D (day), N (night), B (both), or X (not designated). If there is a single value listed under the Day/Night column, click the “Get the granules” link. If there are multiple values listed under the Day/Night column, selec
22、t the desired Day/Night flag then select “Get the granules” on the next page.22ASTER & MODIS Search and Order (cont.)After you receive the results of your search, you may download the granules individually, or you may place selected granules in the shopping cart and order all of the selected granule
23、s at one time.If available, use the Conversion Tool to convert data and order the granules individually. In the shopping cart, you may choose Conversion Tool for individual granules or apply it to all granules.The following pages detail ordering granules individually or through the shopping cart.23A
24、STER & MODIS Search and Order (cont.)NOTE: The Granule ID from the LP DAAC Data Pool is not the same as the Granule ID from the EOS Data Gateway.Using the Tools on the Results Page24ASTER & MODIS Search and Order (cont.)Selecting one of the individual folders allows immediate download of data.Uncomp
25、ressed FileZip compressed FileG-Zip compressed File UNIX compressed File25ASTER & MODIS Search and Order (cont.)Symbols on the Results PageViewBrowseViewMetadataand BrowseConversion ToolShopping CartViewMetadata26ASTER & MODIS Search and Order (cont.)Using the Conversion ToolUse the Conversion Tool
26、to convert the format from a HDF file to a GeoTIFF file.You may convert ASTER data to the Geographic projection. You may convert MODIS data to Geographic, Polar Stereographic, or UTM projections. Only selected MODIS data sets may be subsetted.NOTE: The Conversion Tool divides the selected granule in
27、to separate files for each band.27ASTER & MODIS Search and Order (cont.)To apply the Conversion Tool to individual granules: Click the Conversion Tool icon. From the drop-down boxes, choose Format, Projection, and subsetting (if available). Enter your user name and e-mail address and click “Convert
28、this granule.”Choose FormatChoose ProjectionChoose Subsetting (if available)Enter user name ande-mail addressConvert the granule28ASTER & MODIS Search and Order (cont.)Using the Shopping BasketYou may add granules to the Shopping Basket by selecting the granules individually or by using the Shopping
29、 Basket options at the bottom of the page.NOTE: A red check denotes granules added to your shopping basket.29ASTER & MODIS Search and Order (cont.)Viewing the Shopping BasketYou may change the format and projection of individual granules with the appropriate drop-down boxes or use the format icon or
30、 the projection icon to apply the change to all of the granules in the shopping basket. When you are finished making your selections, click the “Select Media” button. NOTE: The subsetting option for an ASTER granule is only available if the bands from at least two telescopes were acquired.30ASTER &
31、MODIS Search and Order (cont.)To Complete a Data Pool order: Select the download option for your data by using the radio button in the far left column. Click the “OK” button to continue.31ASTER & MODIS Search and Order (cont.) Complete the User Name and E-mail fields. Place a check next to “Send an
32、order notification e-mail” to receive your order id and download links in an e-mail. Click the “Order the Data” button after you have entered the download profile information. 32ASTER & MODIS Search and Order (cont.) You may download your data by clicking the “DataPool ftp site” link or one of the l
33、inks located under “Select a download option”. You may start a new search or go back to the results page by selecting either link beneath the download options.33ASTER & MODIS Search and Order (cont.)To complete an order through FTP download: Complete the download profile and check the acknowledgment
34、 box for e-mail notification. Click the “Order the Data” button after you have completed the form. An order confirmation page will appear after you have ordered your data.34ASTER & MODIS Search and Order (cont.)Please choose from the following links to continue the LP DAAC Data Pool tutorial:MODIS S
35、earch and OrderDirect FTP AccessLand Processes DAAC Contact InformationReturn to IndexASTER L1B granule of Palm Beach, California35MODIS Search and OrderData Pool URL: http:/LPDAAC.usgs.gov/datapool/datapool.aspTo begin your MODIS Search and Order: Click the “MODIS” button located under “Search”. Th
36、e MODIS search option provides the option for searching by MODIS tile for the Tile Grid Products and by data for the Climate Modeling Grid Products.NOTE: Searching the Data Pool is also referred to as the “Drill-Down Method.”36MODIS Search and Order (cont.)Choosing between Grid Products and Climate
37、Modeling Grid Products MODIS Tile Grid Products are data sets which are at resolutions of 250m, 500m, 1km or 5km. MODIS Climate Modeling Grid Products are data sets which are Global 0.05Deg CMG.Note: Ordering Tile Grid Products begins on the following page or click here to continue to the Climate Mo
38、deling Grid Products.37MODIS Search and Order (cont.)Selecting the data type. Select your desired data type(s) from the “Select a Datatype” box. Press and hold the ctrl key to select more than one data type.38MODIS Search and Order (cont.)Select area of interest from the map. Click on a single tile
39、to select it, or click and drag your mouse to select multiple tiles. Right click on the image to clear your selection.39Select the acquisition date or range. Enter your temporal parameters by entering a date or dates in the “From” and “To” boxes using the MM/DD/YYYY format. The temporal parameters m
40、ay also be entered by clicking the calendar icon beside the “From” and “To” boxes. Begin your search by clicking “Search for Data”.MODIS Search and Order (cont.)40Viewing and using the icons on the Results Page. Download the data by clicking on one of the folders. View the browse by clicking on the
41、browse icon (if available). View the metadata by clicking on the metadata icon.MODIS Search and Order (cont.)Uncompressed FileZip compressed FileG-Zip compressed File ViewBrowseViewMetadataNOTE: The Granule ID from the LP DAAC Data Pool is not the same as the Granule ID from the EOS Data Gateway.41D
42、ownloading the data to your computer. Click on the desired format folder for each of the granules that you want to download to your computer. Click the “Save” button on the File Download window, and save the files to your computer.MODIS Search and Order (cont.)42MODIS Search and Order (cont.)Downloa
43、ding data from the Climate Modeling Grid Products. Click “Climate Modeling Grid Products”. Select your desired data type(s) from the “Select a Datatype” box. Press and hold the ctrl key to select more than one data type.43MODIS Search and Order (cont.)Select the acquisition date or range. Enter your
44、 temporal parameters by entering a date or dates in the “From” and “To” boxes using the MM/DD/YYYY format. The temporal parameters may also be entered by clicking the calendar icon beside the “From” and “To” boxes. Begin your search by clicking “Search for Data”.44MODIS Search and Order (cont.)Viewi
45、ng and using the icons on the Results Page. Download the data by clicking on one of the folders. View the metadata by clicking on the metadata icon.NOTE: The Granule ID from the LP DAAC Data Pool is not the same as the Granule ID from the EOS Data Gateway.Uncompressed FileZip compressed FileG-Zip co
46、mpressed File ViewMetadata45Downloading the data to your computer. Click on the desired format folder for each of the granules that you want to download to your computer. Click the “Save” button on the File Download window, and save the files to your computer.MODIS Search and Order (cont.)46Please c
47、hoose from the following links to continue the LP DAAC Data Pool tutorial:Direct FTP AccessLand Processes DAAC Contact InformationReturn to IndexMODIS Search and Order (cont.)MODIS granule of a dust storm in Afghanistan47Direct FTP AccessYou may download data through direct FTP by navigating to the
48、desired granule(s), metadata file(s), and/or browse image(s). You may click the arrowed ASTER or MODIS buttons to begin FTP download.NOTE: With direct FTP access, the data is only available as an uncompressed file(s) in HDF format.48Direct FTP Access (cont.)The directory structure for direct FTP acc
49、ess in the LP DAAC is as follows: Data group FTP ASTER FTP MODIS Aqua FTP MODIS Terra FTP MODIS Combined Data set Acquisition Date Data granules HDF file XML document JPEG (browse) image49Direct FTP Access (cont.)Please use the links below for LP DAAC Data Pool direct FTP access instructions for AST
50、ER or MODIS data: ASTER MODISIndexMODIS granule of Northern Italy and South-central Europe50ASTER FTP AccessTo download ASTER from the LP DAAC Data Pool through direct FTP access: Click the “FTP ASTER” link on the Data Pool homepage. Open the AST_L1B.003 folder in your browser.51ASTER FTP Access (co
51、nt.) Open the desired folder based on the acquisition date. Each folder contains the HDF file(s), XML document(s) (metadata), and JPEG (browse) image(s) for the acquisition date.52ASTER FTP Access (cont.) Select your desired files for download. Click the “Save” button on the File Download window, an
52、d save the files to your computer.53ASTER FTP Access (cont.)Please choose from the following links to continue the LP DAAC Data Pool tutorial:MODIS FTP AccessLand Processes DAAC Contact InformationReturn to IndexASTER L1B granule of Washington, D. C.54MODIS FTP AccessTo download MODIS from the LP DA
53、AC Data Pool through direct FTP access: Click the desired “FTP MODIS” link on the Data Pool homepage (the tutorial will detail an order from the MODIS Aqua data group). Open the desired MODIS data set folder from your browser window. Click here for MODIS data set descriptions.55MODIS FTP Access (con
54、t.) Open the folder of interest based on your acquisition date. Each folder contains the HDF file(s), XML document(s) (metadata), and JPEG (browse) image(s) for the acquisition date.56MODIS FTP Access (cont.) Select your desired files for download. Click the “Save” button on the File Download window
55、, and save the files to your computer.57LP DAAC Contact InformationLP DAAC User ServicesU. S. Geological SurveyUSGS Earth Resources Observation and Science (EROS)47914 252nd StSioux Falls, SD 57198-0001Voice: (605) 594-6116* Toll Free: (866) 573-3222* *8am to 4pm Central TimeE-mail: edceos.nasa.govWeb: http:/LPDAAC.usgs.govIndex58结束结束
