introduction to dar_gisc_tokyo_rev03

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GISC Tokyo Japan Meteorological Agency

Introduction to DAR revision 0.3

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Guide 0: Essentials

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What is DAR?

● WIS = GTS + DAR ● GTS is:

● for operational services (World Weather Watch) ● for time- & operation-critical usage

● DAR is for the rest of you

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What is DAR?

● DAR = Discovery + Access + Retrieval ● Discovery

● You can search whole-WIS catalog

● Access ● Ad-hoc browsing of recent global data

● Retrieval ● Subscribe to data

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Start here: www.wis-jma.go.jp

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Guide 1: Discovery

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You can Search DAR Catalogue

● DAR Catalogue: collection of metadata records ● Metadata record links to data or document ● GISC's DAR Catalogue covers entire WIS

● Not only global data available at GISC Tokyo

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Start search at “metadata” menu

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Now you're browsing catalogue

Metadata Record

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You can search the catalogue

← Metadata Source

← Text in metadata record: only in title, abstract, or keywords, or anywhere (full text)

← Bounding box: latitude & longitude ranges

← Bounding box is displayed as you type

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Each record describes a dataset

Click “+”(plus) button to expand complex content

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Data Access from Metadata

● GTS data: link top of the page

● Other data: section “distribution info” often has links to data

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Guide 2: Access

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Two ways to find data

● GISC Catalogue (described before) ● Scope: entire WIS information ● May link to external site

– JMA can't be responsible about content

● GISC Cache ● Scope: global distribution data only ● All data on GISC Tokyo server

– Coherent service

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GISC Cache Entry Points

This time Click here

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Listing of GISC Cache

● All kinds of recent data

● Newest first ● So much traffic

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Want to Narrow Down Listing?

● You can search ● “WMO Format” ● Select “Select and

Browse”

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Search window of GISC Cache

● You can select data types or properties

● Click “Browse” button ● You'll see new listing

of selected data

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When Browser Asks Password ● The data is somewhat restricted

● WMO additional data ● OPMET (Aviation Weather) data ● Data with other restrictions

● Registration required ● Contact:

Mr. Takahiro Saito Senior Coordinator for International

Telecommunication w i s - j m a @ m e t. k i s h o u. g o. j p

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Guide 2-2: KML Mapping of data

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KML Visualization of data

● Special at GISC Tokyo ● KML is standard format for geographical data ● Can be viewed with Google Earth

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GISC Cache Entry Points

This time Click here

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KML Version of GISC Cache This time Click here

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Google Earth runs from browser

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Google Earth

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Navigate inside KML Catalogue

Click plus (+) to open folder

Click box if folder is empty

Check box to load data Move right tab

here first

Slide left tab here then

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Caveats on Google Earth

● Google Earth may prompt username and password ● This means you are loading restricted data ● Google Earth freezes if you leave prompt ● You can type GISC Tokyo's login and password ● Or you can safely dismiss login

● Sometimes it may get very slow ● When too much data is selected ● Please be patient

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Recent surface reports mapped

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Guide 3: Subscription

(this is a bit tricky one)

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Subscription at GISC Tokyo

● Automatic download of near-realtime data ● Downloading script runs on your computer

● Similar to subscription of RSS ● You can quickly fix if there's problem

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To Start Subscription

● Go to GISC-Tokyo top: http://www.wis-jma.go.jp

● Go to “WMO Format” to open a pull-down menu

● Select “Subscribe”

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Step 1: select data policy

● Choose “Open” to select publicly available data

● Add “Closed” for data with access control ● You have to be

registered in that case

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Step 2: select data type

● Multiple choices not allowed; if you want two or more types of data, please repeat step 1 to 4 and create multiple shell scripts. Try “Surface”

for example

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Step 3: select code form and WMO region

Try “SYNOP” for example

Try “All” for example

● Multiple choices allowed

You can also specify a

producing center or exclude a

center.

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Step 4: select your environment

Click here

This time we assume Linux

On Windows, directory cannot begin with drive

letter (C:) or backslash ( \ )

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Result: script is shown

Copy and paste it to a text file,

that works as a script

● This shell will endlessly repeat subscription ● every 30 seconds

for observation data,

● every 5 minutes for GRIB data,

● every 30 minutes for climate data.

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Linux Instructions ● Check: /usr/bin/wget is installed (okay for most Linux)

● Check: network connectivity (set $http_proxy if you are behind firewall)

● Save script to a text file (any name okay: say download.sh)

● Start it as a background job $ sh ./download.sh start > /dev/null 2>&1 < /dev/null &

● Stop it $ sh ./download.sh stop

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Windows Instructions ● Check: GNU Wget is installed

● Check: Microsoft PowerShell 2.0 is installed

● Open notepad

● Paste script & save (suffix must be .PS1; say download.ps1 )

● Prepare: type on console as administrator

PowerShell -command "& {Set-ExecutionPolicy RemoteSigned}"

● Start:

● Open console & go to folder with script

● PowerShell -WindowStyle hidden .\download.ps1 start

● Console vanishes if successful

● Stop:

● Open console & go to folder with script

● PowerShell .\download.ps1 stop

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Windows Notices ● When in trouble, try PowerShell .\download.ps1 start to see

messages

● Option -WindowStyle hidden closes window

● If you see Yen sign (￥) here, it should be backslash ( ): that’s problem of Asian fonts. Caution on copy-pasting.

● If you download script from Internet or email, the file is marked “remote”. If PowerShell requires digital signature after Set-ExecutionPolicy, try:

● Open file property (by right-clicking on folder view)

● Press “Unblock” button

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Guide 4: Help Desk

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When in trouble...

● Ticket System ● Web-based board

you can write questions

● Registration Required

● Online Documentations

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Entering Ticket System

● Go to “Help Desk” to open menu

● Select “Ticket System”

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Login

● Please enter your login name and password

● Contact us to get registered

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Select “Project”

● Please select “DAR” for most cases

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Project view

● You can post new issue

● You can view existing issues processed

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Posting New Issue

● Please fill: ● Brief title ● Description

● Click “Create” to submit ● You will have email

when GISC Tokyo staff respond

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View issues

● Listing of open issues (being processed)

● To see closed (older) issues: ● Set status “All” ● Click “Apply”

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Questions and Registration Request:

Please contact w i s - j m a @ m e t. k i s h o u. g o. j p