The basic organization for the Data Server is through levels: PI->Date->Data. The Date may be on or more levels, such as 'month', 'month->day', or 'month->day->time'. In each level there are the following buttons:
Directory - Return to data server main directory Documentation - Documentation provided by each PI for data collection, analysis, quality, ... Plotting and Other Operations - Some simple web based plotting features. Level 0 - Return to the first level for the present data type. Next Level - Generally not used. It delivers all data from the present level. For example, from the lowest level (0) with selectable levels of 'Aug', 'Sep', and 'Oct', using the 'Next Level' button will download all 3 months with ASCII character headers separating the months. It's best to just select individual months. Flat Listing - delivers columnar data at the present level with leading character text (level information) and buttons removed. Use this for saving columnar data with the browser. This format can be easily imported into spreadsheets and database programs. The server delivered data and the ftp files have a leading character header that identifies the data type (e.g., Month, Day, gage ID).
Note that missing or bad data is assigned the value -999 to zero or more decimal places. As a result columns with these values will not plot correctly. For MATLAB users there is a C MEX-file, called load2Mat.c that will read these ASCII columnar files with the character header label being assigned as the MATLAB variable name. In this program the -999 values are assigned NaN - if the user would rather have the -999 values simply change the code (search for -999) before compiling.
If you download data from this system, please take (and read) the documentation as well.
There is a good alternative for downloading large datasets using the 'Plotting and Other Operations...' button at the top of the data display. Upon first displaying the dataset, use the browser's 'Stop' button to abbreviate the lengthy download-to-display. Click on the 'Plotting and Other Operations...' button. Choose the menu item entitled, 'Other data listing formats'. Here you are presented with a few options for the format to download. The most popular is the 'CSV style listing'. Hold down the SHIFT key on your keyboard and click on the link. This will begin the download operation by presenting you with the familiar dialog box asking for a filename to which to save the data.
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