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

airphotos in the scale 1: 5 000. The average size of the area pertaining these individual buildings was 0.125 ha. In densely built-up areas these buffers merged into bigger polygons. The contours of individual buffers dissolved in that process and uniform areas of these polygons were taken into account for further elaboration (Fig. 1). The centroids of houses from June 1993 were buffered and the same procedure was repeated with the centroids of houses from June 1997. The built-up areas for these two years were obtained separately. Overlaying the layers with buffered centroids, the locations of pulled-down houses were identified. Next, the buffers that were common for both layers were removed. The remaining presents the augmented built-up areas in Slovenia in the period from June 1993 to June 1997. Figure 1: Schematic presentation of buffered centroids. - black buffered centroids: state '93 - gray buffered centroids: new built-up from '93 to '97 The calculation of the augmented built-up areas by first subtracting centroids and buffering the remaining would be a much faster method but would not enable the merging of adjacent buffers, thus leading to an overestimation of the augmented built-up areas. In our case the calculated augment of built-up area would be greater by 41.5%. 3. ESTIMATION OF LAND COVER CHANGES DUE TO AUGMENTED BUILT-UP AREAS The data layer of augmented built-up areas was overlaid onto the compiled Statistical Land Cover/Land Use GIS of Slovenia-state '93. The areas of wooded and agricultural land cover categories that turned into built-up areas have been determined (Fig. 2). When the new built-up areas were detected within existing built-up areas, they were not considered as land cover/use changes since these buffers did not change the cover/use categories. The buffered centroids that were located with more than 50% of their areas over water, railways or roads were considered as mistakes and removed from the data-layer. In the final stage the layer of augmented built-up areas was merged with the layer of administrative boundaries and thus the augmented built-up areas for each statistical region and for the whole Slovenia were obtained (Tab.1). In Slovenia in the period from June 1993 to June 1997 most augmented built-up areas have expanded on account of agricultural areas (Fig.3). The statistical regions number 6. and 9. have the highest change of agricultural land cover to built-up. Legend: A = agricultural area F = wooded area W = water B = buffered centroids: black = state '93 gray = new built-up from '93 to '97 Figure 2: Schematic presentation of new built-up areas overlaid onto the Land Cover/Land Use GIS of Slovenia - state '93. But it is the graphical presentation of this data that gives us the essential information, i.e. the geographical distribution of the phenomena. As expected, the built-up areas increased mostly around urban centres. However, an exception is the area of Savinja valley where the augmented built-up areas are nearly evenly distributed over the whole valley, which is categoriesed as I st quality agriculture land. The geographic distribution of the augmented built-up areas, using a relatively simple and time efficient method, renders new qualitative information, which would never be revealed by presenting these data only in the classical tabulated form. 4. CONCLUSIONS The Statistical Land Cover/Land Use GIS of Slovenia is the first numerical GIS of Slovenia that comprises a uniform thematic layer of the whole territory. The Statistical Land Cover/Land Use GIS of Slovenia - state '93 officialy confirmed that much more area of Slovenia is under forest than it has been officialy reported. The improved resolution of satellite scanned data used in the Statistical Land Cover/Land Use GIS of Slovenia-state '97 will enable a better delineation of land cover categories down to 15 hectares of minimum mapping unit. Since the geographical heterogenity as well as the small field sizes are the characteristics of Slovenia, this improvement is an important contribution to a more operational use of the compiled Statistical Land Cover/Land Use GIS of Slovenia. The Statistical Land Cover/Land Use GIS of Slovenia- state '97 will enable us to estimate the land cover/use change in the period from 1997 to 2001 due to augmented built-up areas more accurate. In addition, the three level of roads will be included as well as the built-up areas of larger industrial objects, warehouses, parking places, etc., which exceed the size of 20 m buffered centroids.

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