Much work has been done in the area of qualitative spatial reasoning over the past years, with application in various domains. However, existing models only capture particular aspects of the spatial relations between objects and therefore are unable to represent these relations accurately. In this paper, we draw together two existing approaches to provide a calculus taking into account topology...

Global interest in participatory mapping described as public participation GIS (PPGIS), participatory GIS (PGIS), and volunteered geographic information (VGI) continues to grow, but systematic study of spatial data quality and sampling effects is limited. This article provides a review and meta-analysis of Internetbased PPGIS studies conducted during the period 2006–2015 (n526) to answer the fo...

In recent years, the area of plastic-mulched farmland (PMF) has undergone rapid growth and raised remarkable environmental problems. Therefore, mapping the PMF plays a crucial role in agricultural production, environmental protection and resource management. However, appropriate data selection criteria are currently lacking. Thus, this study was carried out in two main plastic-mulching practice...

We test the claim that learning and using language for spatial relations can influence spatial representation and reasoning. Preschool children were given a mapping task in which they were asked to find a "winner" placed in a three-tiered box after seeing one placed in a virtually identical box. The correct choice was determined by finding the corresponding relative location in the test box, ma...

This paper discusses the approaches we have taken to addressing issues of ontology merging and mapping from an ontology to a database, which arise from the semantic data integration problem. We present a proposal for curtailing the extent of an ontology module referenced within another ontology, so that the entire ontology need not be imported if only a small subset is required for reuse. As th...

The ability to map locations in the surrounding environment is crucial for any navigating animal. Decades of research on mammalian spatial representations suggest that environmental boundaries play a major role in both navigation behavior and hippocampal place coding. Although the capacity for spatial mapping is shared among vertebrates, including birds and fish, it is not yet clear whether suc...

A map is not only a result of human spatial environment cognition, but also a tool of human spatial cognition. For many centuries, as a kind of graphic communication tool of spatial information, a map has been playing an important role in human spatial cognition. Spatial cognition is the process of spatial information processing. Spatial cognition is an important research area of cognitive scie...

Sub-pixel mapping technique can specify the location of each class within the pixels based on the assumption of spatial dependence. Traditional sub-pixel mapping algorithms only consider the spatial dependence at the pixel level. The spatial dependence of each sub-pixel is ignored and sub-pixel spatial relation is lost. In this paper, a novel multi-objective sub-pixel mapping framework based on...

High-resolution water mapping with remotely sensed data is essential to monitoring of rainstorm waterlogging and flood disasters. In this study, a modified linear spectral mixture analysis (LSMA) method is proposed to extract high-precision water fraction maps. In the modified LSMA, the pure water and mixed water-land pixels, which are extracted by the Otsu method and a morphological dilation o...