This tour guide is not an exhaustive list of all the functions privided by the software, as it would be too long to download, but it is nevertheless a good glance on what OMNIDIA can actually do to help you in your research.

The following tour guide will explain in details some of the capabilities of the OMNIDIA software. Each of the following paragraph comment one of OMNIDIA's functions. By clicking on the active text present in each paragraph, you will go directly to the screen pictures (taken directly from the software) that refer to the desctibed function (if those pictures do not appear clearly or not at all, press the "reload" button on your browser). To go back to the text after having seen the picture(s), click on "Back to text" under each screen copy. Enjoy your tour.

• The welcome screen give you access to the two main menus : the FILE menu (which is the diatom database) and the INVENTORIES menu.

• The file menu gives you access to the existing database of diatoms stocked into the software and also allows you to stock your own diatoms. You can sort them by families genera or species in each DIATOM FILE.

• You also have the possibility to stock a scanned picture of each diatom in its corresponding diatome file.

• It is possible to display the chart of the species that are selected for the calculation of the IBD indice, showing their probabilty of presence in the in the 7 quality water classifications. This chart can also be displayed graphically.

• There is no limit to the number of inventories in OMNIDIA. There is no limit either in the number of of species in each inventory. 26 items gives details and particularities for each inventories on the inventory screen : number of analysis, slide number, date, name of the basin, the river, the site, the hydrologic code, the mileage point, the sample code (visualise the correspondance through the help menu), particularities (free text zone), etc. Omnidia calculates the 17 indices of each inventory :IIBD IDAP, SHE, TDI, WAT, IPS, SLA, DES, L&M, IDG, CEE,EPI-D, ROTT troph, ROTT sap, LOBO, IDP, DI-CH

• Omnidia then calculates the the ecologic characteristics of each inventory. The first ones are the Van Dam, Lange Bertalot and Hoffmann indices. The second table shows the Denys, Hakansonn, Renberg & Hellberg and Eloranta indices.

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