IDL – Meteorology – BoM Dr Robert Dahni [email protected] Bureau of Meteorology Melbourne...
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Transcript of IDL – Meteorology – BoM Dr Robert Dahni [email protected] Bureau of Meteorology Melbourne...
![Page 1: IDL – Meteorology – BoM Dr Robert Dahni r.dahni@bom.gov.au Bureau of Meteorology Melbourne AUSTRALIA 6 August 2001.](https://reader038.fdocuments.us/reader038/viewer/2022110207/56649d625503460f94a43d90/html5/thumbnails/1.jpg)
IDL – Meteorology – BoMIDL – Meteorology – BoM
Dr Robert Dahni
Bureau of Meteorology
Melbourne AUSTRALIA
6 August 2001
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IDL and Bureau of MeteorologyIDL and Bureau of Meteorology
IDL used since 1993BMRC (research)COSB (operations)AIFS (major project)Olympics (special event)SSU (commercial)
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IDL and Malaysian Meteorological IDL and Malaysian Meteorological Service (MMS) UpgradeService (MMS) UpgradeBoM (SSU) commercial projectIDL requirements for MMS upgradeSSU implementation strategyBackground mapsIDL applications (demo)Tips, techniques and resourcesWork in progress …
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IDL Requirements for MMS UpgradeIDL Requirements for MMS Upgrade
Background maps– coastlines, political, topography
Interactive visualisation (GUI)– real-time meteorological data– server, workstation and/or PC–UNIX, PC X-Emulation, Windows
Product generation – assistantWeb graphics – image files
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SSU Implementation StrategySSU Implementation Strategy
Get experienced IDL programmerWrite software requirementsUtilise existing AIFS/IDL applicationsDevelop prototype applicationsFeedback, training and documentationOperational implementationWork in progress …
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Background MapsBackground Maps
Global 1-km topography GTOPO30 (~1.8 Gb) gettopo.pro -> binary file Textured fill topography maptopo.pro -> image file displaymap.pro -> window 2 CD’s of data
0E - 180E, 50oS - 50oN
180W - 0W, 50oS - 50oN
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Background Maps (continued)Background Maps (continued)
Global variable-resolution coastlines (GSHHS) map_gshhs.pro -> coastlines U.S. Geological Survey “Coastline Extractor” plot_boundaries.pro -> political
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IDL Applications (demo)IDL Applications (demo)
OBSViewer – weather observationsNWPViewer – NWP model outputMapDraw – drawing toolGONO – marine model outputStreamline – product generationMapGrid – NWP web graphicsMapObs – observations web graphicsWork in progress …
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OBSViewer – weather observationsOBSViewer – weather observations
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NWPViewer – NWP model outputNWPViewer – NWP model output
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MapDraw – drawing toolMapDraw – drawing tool
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GONO – marine model outputGONO – marine model output
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Streamline – product generationStreamline – product generation
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MapGrid – NWP web graphicsMapGrid – NWP web graphics
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MapGrid (continued)MapGrid (continued)
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MapObs - observations web graphicsMapObs - observations web graphics
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Tips, Techniques and ResourcesTips, Techniques and Resources
Re-utilise existing relevant code Check publicly available IDL code Write neat, re-usable procedures Development – IDL (Windows 2000) Implementation – Windows and/or UNIX Use Direct Graphics unless interactive 3D Simple, flexible GUI design (non-resizable) Batch mode (use Z-buffer or Postscript)
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Tips, Techniques and Resources Tips, Techniques and Resources (continued)(continued) Use both IDL 5.3 and 5.4 (or latest version) Parameterise image format (GIF or PNG) Use read/write_image (NOT read_gif) Support 8- AND 24-bit color (Color_Quan) device, get_visual_depth=visual_depth device, Decomposed=0, Retain=2 Use color names (FSC_Color) Split color table (data/drawing colors)
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Tips, Techniques and Resources Tips, Techniques and Resources (continued)(continued) Global 1-km topography (GTOPO30) Textured fill topography Use cylindrical map projection
/cyl, /noborder, xmargin=0, ymargin=0
to overlay geo-referenced data Global coastlines (GSHHS) Political boundaries (Coastline Extractor) …
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Tips, Techniques and Resources Tips, Techniques and Resources (continued)(continued) Australian IDL website
Graphics - IDL Image Gallery
http://www.metvis.com.au/graphics
Robert Dahni’s IDL Web Pages
http://www.metvis.com.au/idl/
Links to publicly available IDL code and applications
http://www.metvis.com.au/idl/idl_code.html
Links to coastline, topography data sets
http://www.metvis.com.au/idl/idl_resources.html
Updated links to IDL resources worldwide