Abstract
Abstract. Presently, urban agriculture (UA) is an important part of the urban ecosystem and a key factor that can help in the urban environmental management. Therefore, this paper studies a spatial-temporal analysis of UA areas and types in Municipality of Nakhonratchasima City (MNC), Thailand. This UA types referred land use classification system of Land Development Department (LDD). Google Earth images acquired in the years of 2007, 2011, 2015 and 2018 were used to examine UA change with segmentation-based classification method in QGIS to classify Google Earth images into thematic maps. Moreover, this study showed different spatiotemporal change patterns, composition and rates in the study area and indicates the importance of analyzing UA change. Therefore, the results of this classification consisted of eleven classes – abandoned paddy field, rice paddy, abandoned field crop, mixed field crop, cassava, betel palm, mixed orchard, coconut, rose apple, truck crop, and fish farm. Truck crop had the greatest cover in study area while floricultural covered the minimal space over periods of study. The UA change analysis over time for entire study areas provides an overall picture of change trends. Furthermore, the UA change at census sector scale gives new insights on how human-induced activities (e.g., built-up areas and roads) affect UA change patterns and rates. This research indicates the necessity to implement change detection for better understanding the UA change patterns and rates.
Highlights
1.1 Urban AgricultureUrban agriculture (UA) is one important type of urban land use/cover planning or an agricultural activities in urban areas
For Nakhonratchsima municipality (NM)’s urban agriculture (UA), Land development Department (LDD) from 2007 to 2015 recorded NM’s UA types in from of GIS data layer that was displayed on QGIS and was found by eleven types: abandoned paddy field, rice paddy, abandoned field crop, mixed field crop, cassava, betel palm, mixed orchard, coconut, rose apple, truck crop, and fish farm
4.1.1 Results of mean shift segmentation based Google earth (GE) images in eleven-UA types: The mean shift algorithm provides an efficient way to simplify (Zou and Lin, 2013) and helps to open the original image into a multi-scale space to allow the incorporation of scale into classification (Vu, 2012)
Summary
Urban agriculture (UA) is one important type of urban land use/cover planning or an agricultural activities in urban areas. UA provides food, economic, social and environment (Goodman and Minner, 2019; Dieleman, 2017) that types of UA includes a diversity of agriculture in both hidden and obvious patterns that is depend on that urban area’s location. Meaning of UA, generally, is briefly defined as the growing of urban food areas (Weidner et al, 2019; Mackay, 2018; Pulighe and Lupia, 2016; Taylor and Lovell, 2012). The present studying of UA may include peri-urban agriculture, acronym as ‘UPA’ that consists of growing crops, raising animals, and their associated activities either within or along the fringes of cities (de Zeeuw, van Veenhuizen, and Dubbeling 2011). Interesting, most truck crops (higher than 70%) covered in NM area and increased between 2007 and 2015
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