Tell me what you think of the global mapping site or web mapping in general. I'd love to know how you'd apply the technology if it was readily available to you.
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Showing messages 1 through 3 of 3.

• a question about the webserver
  2004-09-17 20:43:52  joshyx [Reply | View]
  
  

  
  Hi Tyler. I've been working on a simple webstart Java app that will show the current hurricane. I've been able to load each layer using code like this:
  

  
  

  
  
          StringBuffer sb = new StringBuffer();
  
          sb.append("http://dev.gomoos.org/cgi-bin/wms_nhc?");
  
          sb.append("request=GetMap");
  
          sb.append("&format=image/gif");
  
          sb.append("&srs=EPSG:4269");
  
          sb.append("&version=1.1.1");
  
          sb.append("&layers="+layer);
  
          //sb.append("&bbox=-100+100+200+200");
  
          try {
  
              URL url = new URL(sb.toString());
  
  
  
  

  
  

  
  Unfortunately this shows the entire country. How do you set the size of the bounding box? Do you have to provide some coordinates in lat/long units?
  

  
  
  

  Thanks,<br/>
  - Joshua
  

  
  
  

  
  BTW, if you want to see the app: click here:
  http://code.joshy.org/projects/stormdrain/StormDrain.jnlp
  

• a question about the webserver
  2004-09-17 21:24:21  Tyler Mitchell | [Reply | View]
  
  
  Hi Joshua, thanks for commenting. You are only a step away from satisfaction!
  
  First, a couple tips.
  
  The OpenGIS WMS specs can very helpful (here)
  
  A quick read says that the bbox syntax you used is wrong (sorry :), the coordinates must be comma-separated. i.e. &bbox=-180,-90,180,90 will give a map for the whole earth. Bbox defines the geographic extents shown on the map, so you just need to hone that down a little bit.
  
  Second tip, if you build your own URL and make some mistake, the provider will often return a message that is quite helpful. For example, I tried:
  

  http://dev.gomoos.org/cgi-bin/wms_nhc?request=GetMap&format=image/gif&srs=EPSG:4269&version=1.1.1&layers=frances_track&bbox=-100+100+200+200

  
  and got back an XML doc with this message:
  

  Wrong number of arguments for BBOX.

  
  
  Once I replaced with a (more?) valid coordinates and put in commas instead of +, then it works.
  
  The only other factor that you may not be familiar with is the ability to request an image size. This is done using

  &height

  and

  &width

  and is given in pixel size.
  
  Here's one URL I came up with for a tiny image.
  

  http://dev.gomoos.org/cgi-bin/wms_nhc?request=GetMap&format=image/gif&srs=EPSG:4269&version=1.1.1&layers=land,frances_track&bbox=-120,20,0,40&width=200&height=150

  
  

• Jeanne not Jeanine
  2004-09-15 18:14:04  Tyler Mitchell | [Reply | View]
  
  
  Ah the beauty of bleeding-edge. Somewhere along the way, the name of one hurricane got written wrong. I received a courteous email today letting me know of the mistake and have updated this weblog (and the web service) to reflect reality.
  
  
  --Tyler