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1] Our Database
2] Data Tables
3] Data Plots



Our Database

Our database will store all of the data retrieved from all REMOTE sites. Normally, data from the sites will be updated every 10 to 15 minutes and will later be transferred to our database every hour. Some sites such as Quail Ridge and LTRAS, data will be updated every hour instead, and for LTRAS our database will get updated every 6 hours. Our website will only display the most recent single values of the REMOTE sites but will not display all data values that are available in our database. On the other hand, users who have access to WebStatistica can have full access to all data available in our database.

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Data Tables

When a user requests to view the data in table form, we will retrieve the data from our database and display the formatted data values in a table. Data table that we generate will contain the single values of the most recent data available in our database. Sites update at different times, so the time of the most recent data for different sites may vary.

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Data Plots

A user can request to plot the data on a line graph with 24 hours, 7 days, and 30 days time frame options. The 24 hours graph will generate a graph over a 24 hours time interval using the most recent 24 hours of data available in our database. The same concept applies to the 7 days and 30 days graph. We use all data points in the 24 hours and 7 days graphs. For the 30 days line graphs, however, if the data are updated with a 10 or 15 minutes frequency, we will not use all the data points to plot the graph. Instead, we will find the average of the data points in every 3 hours and use these average points to plot the graph.

In all graphs, the lines may be discontinuous. The discontinuities on the plots represent missing data or invalid data. Also, as mentioned in the Data Table section, sites update at different times, thus the dates and times of the graphs may vary.

The REMOTE site graphs are created with the ASPCanvas package version 2.0.0. This is a free package that allows one to draw images on the fly using VBScript on an IIS/ASP based server and it is available at http://users.bigpond.net.au/mrjolly.

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