ChemicalSE: Internet application for the managment of a large volume of geographical invormation using exclusively free sofware

he volume of data produced during the preparation of the project "Chemical quality check of irrigation waters (surface and groundwater) at the level of river basins of Sterea Greece (Prefecture of Fthiotida – Fokida – Biotia - Evritania and Evia)", which came from sampling of surface waters (water and sediment) and groundwaters (water) as well as level measurement, was large. More specifically, in order to collect the necessary data it has been designed and installed a network of sampling in rivers (Sperchios, Biotian Kifissos, Acheloos, Tavropos, Karpenisiotis, Krikelopotamos, Mornos, Asopos, Kallas, Kireas, Nileas, Voudouros, Lilas, Nireas and Mornos), in lakes ( Mornou, Yliki, Paralimni, Dystos, Kremaston), in drainage canals and boreholes - wells of Sterea Greece. In addition, an extensive network of level measurements was designed in order to measure the groundwater level. A total of 1,590 water samples and 966 sediment samples were collected. A series of parameters were determined in these samples. The total number of measurements in the collected samples is estimated at 1,173,204 values.

Taking into account the above, the question that arosed was the possibility of registering all this data, in combination with the basic geographical, geomorphological and hydrographic data of the study area, in a system with some basic principles, such as: a) to be dynamic and enable processing , b) to use only free and open source software in all software used in the application, c) any browser will be sufficient for the access to the application, d) to have compatibility and adaptation of the application to all types of devices ( responsive design), recognizing the growing importance of mobile devices e) to enable the input of large volumes of data in an automated way, while setting limits to avoid errors and f) to have provision for viability and scalability of the application. Based on the above, ChemicalSE was created, which is a web application that combines geospatial information with a database. The website https://chemicalse.minagric.gr is the main access portal (portal) for the GIS that includes an interactive map that can display the metering network, while providing all the data to certified users. Last but not least all the above have as a result that the spatial analysis and management of geographical information through ChemicalSE will be comprehensible by all, without requiring specialized GIS knowledge, while ensuring its scalability.