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In the field of RS and GIS, automated information extracted from topographic sheet or reference map plays a pivotal role in assisting researchers in performing various inferential analyses that aids in making qualitative as well as quantitative assessment of the features. Such automated procedures tremendously reduces time and effort requirement compared to that of traditional manual techniques. This work aims at associating stream order for vector hydrograph using spiral traversal technique that reduces time complexity from O(n2) to o(n).

Perception and expectation of citizens is an important factor in urban planning, settlement and management. Hence, there is a need of a participatory citizen centric planning of urban settlement based on spatial data. These perception and expectation may be represented in terms of emotions. Determining Urban Emotions is an approach which can be used to map different types of emotions associated with urbanization. In the recent years, some new methods have been presented for the area of urban and spatial planning, resulting in a fundamental change of the understanding of urban planning. Geographical information system acts as a key factor for analyzing urban emotions from various types of data. This paper presents the review of ongoing research on various techniques for determining urban emotions in the recent years.

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