Browsing by Author "Cierniewski, Jerzy"
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Item Digital aerial images land cover classification based on vegetation indices(Wydział Nauk Geograficznych i Geologicznych UAM, 2012) Dzieszko, Maciej; Dzieszko, Piotr; Królewicz, Sławomir; Cierniewski, JerzyKnowledge of how land cover has changed over time improve assessments of the changes in the future. Wide availability of remote sensed data and relatively low cost of their acquisition make them very attractive data source for Geographical Information Systems (GIS). The main goal of this paper is to prepare, run and evaluate image classification using a block of raw aerial images obtained from Digital Mapping Camera (DMC). Classification was preceded by preparation of raw images. It contained geometric and radiometric correction of every image in block. Initial images processing lead to compensate their brightness differences. It was obtained by calculating two vegetation indices: Normalized Difference Vegetation Index (NDVI) and Green Normalized Vegetation Index (gNDVI). These vegetation indices were the foundation of image classification. PCI Geomatics Geomatica 10.2 and Microimages TNT Mips software platforms were used for this purpose.Item Influence of several size properties on soil surface reflectance.(Wydział Nauk Geograficznych i Geologicznych Uniwersytetu im. Adama Mickiewicza, 2010) Cierniewski, Jerzy; Kuśnierek, KrzysztofSeveral examples are provided here to quantify how the soil is influenced by the soil surface properties, i.e.: content and composition of organic matter, content of calcium carbonate, texture, moisture, as well as surface roughness. 28 soil samples were collected from the test area on a ground moraine, located north of Poznań. The soil samples were measured spectrally with an ASD FieldSpec 3 spectrophotometer in controlled laboratory conditions, in order to obtain a plot of the soil reflectance as a function of wavelength, from 400 nm to 2500 nm. The soil samples were also analyzed in the laboratory to establish their selected properties. The research shows that all tested soil properties strongly influence the soil reflectance.