McIDAS Learning Guide
Version 2006

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Graphics and the Cursor - Locating Specific Positions Using the Cursor

1. Display the latest Meteosat-3 Visible image on frame 2 centered over Bangor, Maine. Add a high resolution map.

   Type:  IMGDISP BLIZZARD/M3-VIS 2 STA=BGR SF=Y;MAP H

2. List all of the Metar stations in West Virginia.

   Type:  STNLIST ST=WV TYPE=M

   The Metar stations in West Virginia are listed, including their station number, station ID, data types, state and country, earth coordinates, and elevation, as shown below.

   STNLIST ST=WV TYPE=M IDN ID Station Name Data Types ST CO LAT LON ELE ----- ----- -------------------- ----------------- -- -- ---------- ---------- ---- --- K3I2 Point Pleasant M WV US 38:54:52 82:05:54 196 --- K48I Sutton M WV US 38:41:13 80:39:06 387 72412 KBKW Beckley M 36 T EG WV US 37:47:42 81:07:29 763 --- KBLF Bluefield M T EG WV US 37:17:45 81:12:28 871 --- KCKB Clarksburg M T EG WV US 39:18:00 80:13:29 366 72414 KCRW Charleston M 36 T EG WV US 38:22:46 81:35:29 299 72417 KEKN Elkins M 36 T EG WV US 38:53:07 79:51:10 605 --- KHLG Wheeling M T EG WV US 40:10:13 80:38:40 364 72425 KHTS Huntington M 36 T EG WV US 38:21:54 82:33:18 252 --- KI16 Pineville M WV US 37:36:01 81:33:33 544 --- KLWB Lewisburg / Greenbri M T EG WV US 37:52:00 80:24:00 702 --- KMGW Morgantown M T EG WV US 39:38:58 79:55:16 380 --- KMRB Martinsburg M T EG WV US 39:24:07 77:59:04 170 --- KPKB Parkersburg M T EG WV US 39:20:42 81:26:21 262 --- KRLX Charleston M WV US 38:19:00 81:43:00 364 --- KSSU White Sulphur Sprng M WV US 37:46:00 80:20:00 549 --- KW22 Buckhannon M WV US 39:00:00 80:16:00 498 --- KW99 Petersburg M WV US 38:59:00 79:08:00 293 Number of stations listed: 18 STNLIST: Done

3. List the stations in West Virginia that include CHARLESTON in the name.

   Type:  STNLIST ST=WV MATCH=CHARLESTON

   STNLIST ST=WV MATCH=CHARLESTON IDN ID Station Name Data Types ST CO LAT LON ELE ----- ----- -------------------- ----------------- -- -- ---------- ---------- ---- --- CRW Charleston F WV US 38:22:46 81:35:29 299 --- CRW CHARLESTON V WV US 38:22:00 81:36:00 299 --- HCV CHARLESTON V WV US 38:22:00 81:36:00 0 --- HVQ CHARLESTON V WV US 38:22:00 81:36:00 0 72414 KCRW Charleston M 36 T EG WV US 38:22:46 81:35:29 299 --- KRLX Charleston M WV US 38:19:00 81:43:00 364 --- RLX CHARLESTON N WV US 38:18:40 81:43:23 415 --- RLX CHARLESTON W WV US 38:18:47 81:43:07 0 Number of stations listed: 8 STNLIST: Done

4. Position the cursor over Charleston.

   Type:  PC L CRW

   The PC command places the cursor over the designated location (L indicates location) on the displayed frame.

5. Display the coordinates at the cursor position.

   Press:  Alt E

   Notice that the latitude and longitude are the same as those listed in the STNLIST output.

   Frame Latitude Longitude Tvline Tvelem Line Elem 2 38:22:45 081:35:38 341 94 821 2255

6. List the towns closest to Charleston and then press Alt-Q to quit the TOWNS command.

   Type:  PC L CRW;TOWNS

   Press:  Alt G

   Press:  Alt Q

7. If you would like to enter the current lat/lon position of your cursor onto the command, you can press the Ctrl button on your keyboard and the left mouse button simultaneously. Enter a lat/lon pair into an IMGPROBE command using this method.

   Type:  IMGPROBE MODE=N LATLON= - but don't press Enter!
   

   Press:  Ctrl LeftMouseButton

   Press:  Enter

   This should give you the image information for your current cursor location.

8. Find the country code for Canada, as you will need it for the CO keyword in step 8.

   Type:  CCODE CANADA

9. Find the station code for Montreal.

   Type:  STNLIST CO=CA MATCH=MONTREAL

   The text window lists eight stations in Montreal, as shown below. Use the 4-letter station code for Montreal/Dorval.

   STNLIST CO=CA MATCH=MONTREAL IDN ID Station Name Data Types ST CO LAT LON ELE ----- ----- -------------------- ----------------- -- -- ---------- ---------- ---- --- CWGJ Montreal River Radar M CA 47:14:00 84:31:00 559 71675 CWPQ Montreal-Est M 36 CA 45:38:00 70:33:00 51 --- CYMX Montreal / Mirabel M T CA 45:41:00 74:02:00 82 71627 CYUL Montreal / Dorval In M 36 T CA 45:28:00 73:45:00 31 --- IDO MONTREAL V QB CA 45:28:00 73:45:00 0 --- UTM ST MATHIAS/MONTREAL V QB CA 45:20:00 73:16:00 0 --- WAO MONTREAL V QB CA 45:28:00 73:45:00 0 --- YMX MONTREAL V QB CA 45:50:00 74:23:00 82 --- YUL MONTREAL P.Q. V QB CA 45:31:00 73:58:00 36 Number of stations listed: 9 STNLIST: Done

10. Position the cursor at Montreal.

    Type:  PC L CYUL

11. Display the coordinates at the cursor position.

    Press:  Alt E

12. List the Metar, Synoptic and RAOB stations that are closest to Montreal.

    Type:  PC L CYUL

    Press:  Alt S

13. Plot all of the RAOB stations that are within the navigation of your image frame.

    Type:  STNPLOT TYPE=R

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