International cooperation and technology transfer

Fras, Mojca Kosmatin

Bibliographic data

Monograph

Persistent identifier:: 856490555

Author:: Fras, Mojca Kosmatin

Title:: International cooperation and technology transfer

Sub title:: Ljubljana, Slovenia, February 2 - 5, 2000 : proceedings of the workshop

Scope:: VI, 163 Seiten

Year of publication:: 2000

Place of publication:: London

Publisher of the original:: RICS Books

Identifier (digital):: 856490555

Illustration:: Illustrationen, Diagramme

Language:: English

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2016

Document type:: Monograph

Collection:: Earth sciences

Chapter

Title:: LAND COVER CHANGE ESTIMATION IN THE COMPILED LAND COVER/LAND USE GIS OF SLOVENIA: JUNE '93-JUNE'97. Lojovic E. H., Sabic D. and Tretjak A.

Document type:: Monograph

Structure type:: Chapter

110 LAND COVER CHANGE ESTIMATION IN THE COMPILED LAND COVER/LAND USE GIS OF SLOVENIA: JUNE '93-JUNE'97 Lojovic E.H., Sabic D. and Tretjak A. All authors: Department of Statistical Geomatics and GIS Statistical Office of the Republic of Slovenia Vozarski pot 12; SI-1000 Ljubljana; Slovenia The ISPRS WG VI/3 and WG IV/3 joint meeting: Bridging the Gap KEY WORD: Land cover change, Land cover, Land use, Geocoded data layers, Satellite scanned data, centroids of houses, GIS ABSTRACT: In order to estimate the size, location and previous land cover of augmented built-up areas in Slovenia in the period from June 1993 to June 1997 the data layers of built-up areas and Statistical Land Cover/Land Use GIS - state '93 were used. The Statistical Land Cover/Land Use GIS was compiled at the Statistical Office of Republic of Slovenia using several existing georeferenced data layers of which the georeferenced Landsat-TM/93 satellite scanned data present the thematic layer. That layer was visually interpreted with the minimum mapping unit of 20 hectares. The augmented built- up areas were obtained from two data layers containing centroids of houses: June 1993 and June 1997. They were buffered and merged, the common areas were eliminated and the remaining were overlaid onto the compiled Statistical Land Cover/Land Use GIS of Slovenia - state '93. Thus the land cover categories that turned into built-up areas were determined. As expected the density of new built houses is the highest around urban centres and most of the new houses were built on agricultural land. It is worth pointing out the area in Central Slovenia (Savinja valley) which is categoriesed as first quality agricultural area, where the new built-up areas are nearly evenly distributed over the whole valley. It is important to stress that the simultaneous use of land cover and built-up data layers enables a quick and simple i.e. visual identification of the location and extent of this kind of land cover changes. In addition, it can be used also as a correction tool for the producers of these data layers as some illogical locations of centroids of houses are immediately visually detected. It is our goal to analyse the same change for the period from 1997 to 2001, using the Statistical Land Cover/Land Use GIS of Slovenia - state '97 with the minimum mapping unit of 15 hectares with the augmented built-up areas data layer, which will, in addition to the centroids of houses, include also built-up areas of larger industrial objects, warehouses, parking places, etc., as well as the railways and the first three levels of roads. 1. COMPILATION OF THE LAND COVER/LAND USE GIS OF SLOVENIA In 1997 the first Statistical Land Cover/Land Use GIS of Slovenija-state'93 was compiled merging a number of georeferenced data layers, all from 1993 and covering the whole Slovenia (2,027,245 ha): Landsat-TM satellite scanned data, digitised administrative boundaries, digitised boundaries of wooded areas, digitised boundaries of water bodies, digital elevation model: 100 m by 100 m (DEM-100), centroids of houses, vectors of railways, vectors of first level roads. These data were used for the delineation of the five main land cover/land use categories (Duhamel, 1995): 1. Wooded land cover, 2. Agricultural land use, 3. Areas under water, 4. Bare rocks, i.e. non-vegetated land cover, 5. Man-made land use, i.e. houses, roads, railways. In addition, the category "undefined areas" was introduced, comprising 0.01% of the classified territory. The three elements of the 5 th land cover category, i.e. houses, roads and railways, were obtained from three separate data layers. The first data layer was acquired from buffered centroids of houses the procedure of which is described in the next chapter. The central lines of roads' and railways' data layers were buffered according to the official width of corridors of roads and railways respectively. These buffered data layers were merged, crossings and overlapping areas cleaned and used as one data layer presenting the "man-made" land use category. (Sabic, 1998; Lojovic, 1999). 2. ESTIMATION OF AUGMENTED BUILT-UP AREAS In the Register of Territorial Units the records of only those houses that have house numbers are collected. The houses are defined with geographic co-ordinates as: "a unique identification of every residential or commercial building". The geographic co-ordinates indicate the centre of each house and are named centroids. The centroids are thus points, that do not bear information on the use of the building or on its area. In order to estimate the area under every building, including the average area of the pertaining yard or garden, the centroids were buffered with a radious of 20 m (Peled, 1993). The selection of a 20 radius was based on a statistical analysis of sampled individual buildings over all Slovenia, and the areas of yards, gardens and auxiliary buildings were measured on

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