How is the Contoured Rainfall Map produced?
The Contoured Rainfall Map is produced from the ALERT database and ARCview GIS software. A program takes information from the form submitted on the Web, such as the ending date/time and the desired map duration, and produces from the ALERT database a table of rain gage values to be plotted. This is then read into ARCview, and a plug-in called Spatial Analyst interpolates a surface, much like a topographic map, to produce the contoured map. The image is then copied to a paint program where the scale and time period text are added. Finally, the image is sent via FTP to the Rainfall Information page of the Web site.
The Contoured Rainfall Map is produced using a remote-shell login to the ALERT database and ARCview GIS software. A program takes information from a form, such as the ending date/time and the desired map duration, and produces from the ALERT database a table of rain gage values to be plotted. This is then read into ARC view, and a plug-in called Spatial Analyst interpolates a surface, much like a topographic map. A contoured map is produced, and the operator can choose to add other coverage’s like highways, boundaries, and the rain gage locations. The image is then copied to a paint program where the scale and time period text are added. Finally, the image is sent via FTP to the web site.
