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The effects of land use and land cover geoinformation raster generalization in the analysis of LUCC in Portugal
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Orientador(es)
Resumo(s)
Multiple land use and land cover (LUC) datasets are available for the analysis of LUC
changes (LUCC) in distinct territories. Sometimes, different LUCC results are produced to characterize
these changes for the same territory and the same period. These differences reflect: (1) The different
properties of LUC geoinformation (GI) used in the LUCC assessment, and (2) different criteria
used for vector-to-raster conversion, namely, those deriving from outputs with different spatial
resolutions. In this research, we analyze LUCC in mainland Portugal using two LUC datasets with
different properties: Corine Land Cover (CLC 2006 and 2012) and LUC official maps of Portugal
(Carta de Ocupação do Solo, COS 2007 and 2010) provided by the European Environment Agency (EEA)
and the General Directorate for Territorial Development (DGT). Each LUC dataset has undergone
vector-to-raster conversion, with different resolutions (10, 25, 50, 100, and 200 m). LUCC were
analyzed based on the vector GI of each LUC dataset, and with LUC raster outputs using different
resolutions. Initially, it was observed that the areas with different LUC types in two LUC datasets in
vector format were not similar—a fact explained by the different properties of this type of GI. When
using raster GI to perform the analysis of LUCC, it was observed that at high resolutions, the results
are identical to the results obtained when using vector GI, but this ratio decreases with increased cell
size. In the analysis of LUCC results obtained with raster LUC GI, the outputs with pixel size greater
than 100 m do not follow the same trend of LUCC obtained with high raster resolutions or using
LUCC obtained with vector GI. These results point out the importance of the factor form and the area
of the polygons, and different effects of amalgamation and dilation in the vector-to-raster conversion
process, more evident at low resolutions. These findings are important for future evaluations of
LUCC that integrate raster GI and vector/raster conversions, because the different LUC GI resolution
in line with accuracy can explain the different results obtained in the evaluation of LUCC. The present
work demonstrates this fact, i.e., the effects of vector-to-raster conversions using various resolutions
culminated in different results of LUCC.
Descrição
Palavras-chave
LUC LUCC Geoinformation properties Raster generalization Spatial analysis
Contexto Educativo
Citação
Meneses, B., Reis, E., Reis, R., & Vale, M. (2018). The effects of land use and land cover geoinformation raster generalization in the analysis of LUCC in Portugal. ISPRS International Journal of Geo-Information, 7(10), 390. https://doi.org/10.3390/ijgi7100390
Editora
MDPI