Application possibilities of remote sensing and geographic information system tecniques at the planining soil survey


Thesis Type: Postgraduate

Institution Of The Thesis: Uludağ Üniversitesi, Turkey

Approval Date: 2004

Thesis Language: Turkish

Student: DİLEK ŞAHİN

Supervisor: ERTUĞRUL AKSOY

Abstract:

In the past, spatial data from the earth surface could only be collected in the field but advances in computer technology and techniques have introduced new group of tools, methods, instrument and systems especially for to improve acquisition, processing, transforming, displaying, mapping and use of geo-information (or spatial data). Some examples of them are the remote sensing techniques, geographic information system (GIS), algorithms for spatial data modeling, geo-statistical tools, and GPS (Global Positioning Systems) receivers. In last two decade remote sensing; observation of the earth surface from distance and GIS; a powerful set of tool for collecting, storing, transforming, analyzing, modeling and displaying spatial data from the real World are become essential tools for the management and the planning of resources. In order to describe actual condition, to detect changes and to find out characteristics and distribution of the soils that one of the most important un-renewable resources, for sustainable use and management, detailed soil surveys are the best and essential way. Used base maps and applied methods can be varied due to available instruments, data types, experienced person, hardware and software. In 1988, DSI (General directorate of state hidraulic works) has been decided to establish irrigation project for the agricultural lands of Manyas Plain. In 1999, due to this project, planning soil survey and mapping works using by cadastral topographic maps 1:5000 scale were started to apply by the GDRS (General directorate of rural service) in order to produce soil, land capability and irrigation suitability classification maps and Storie index maps for the land consolidation and management purposes. In 2000, three Village's detailed soil survey and mapping works were continiued and soil maps were also produced. For this reason, these three villages ( Salur, Börülceağaç and Kızıksa) were selected as a research subject. In this research, our objective was to evaluate the effectiveness and usage probability of Remote sensing and GIS techniques at the stage of storing, creating soil database and analysing spatial and non spatial data from planning soil survey maps and reports for IIIthe soil conservation and management purposes. For this aim, all necessary and integrated data were gathered from existing detailed soil survey maps and reports, topographic map and digital satellite data and stored into the computer by using scanner, digitizer, CD-ROM and keyboard. Then all the stored digital data was converted to the ILWIS and ERDAS image processing and GIS software program format. Image sub-setting, geographic correction, image enhancement, supervised classification, contour digitizing and interpolation, map and table calculation procedures were applied for to produce soil and soil characteristics maps (such as texture, drainage, land capability and Storie index maps), land cover/land use, slope, parcel distance to village center and parcel size distribution maps. Using RS and GIS technologies and integrating DEM, satellite and ancillary data are introdused very powerful tools for setting soil databases from planning soil survey maps and other digital data. The ILWIS and ERDAS software program is absolutely user-friendly and can easily be support necessary procedures for data needs of land management and consolidation applications.