A combined contour lines iteration algorithm and Delaunay triangulation for terrain modeling enhancement

Miky, Yehia; Kamel, Abdullah; Shouny, Ahmed El

doi:10.1080/10095020.2022.2070553

Cited by 4 publications

(1 citation statement)

References 38 publications

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“…This analysis employs a connectivity map (minimum spanning tree) to identify natural groupings of administrative counties in the northeast black earth region, thus ensuring their spatial connectivity as much as possible. The spatial constraint method used in this analysis is the Delaunay triangulation (DT) method, whereby elements in the same group share at least one natural neighborhood with another element in the group [44,45]. The optimal number of groups for subgroup analysis is determined by the pseudo F-statistic, which measures subgroup effectiveness.…”

Section: Zoning Of Cropland Management Types In the Northeastern Blac...mentioning

confidence: 99%

Cropland Zoning Based on District and County Scales in the Black Soil Region of Northeastern China

Li,

Wang,

et al. 2024

Sustainability

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The black soil region of northeastern China, one of the world’s major black soil belts, is China’s main grain-producing area, producing a quarter of China’s commercial grain. However, over-exploitation and unsustainable management practices have led to a steady decline in the quality of arable land. Scientific and reasonable zoning of arable land is the key to ensuring that black soil arable land achieves sustainable development. In this study, the 317 districts and counties under the jurisdiction of Heilongjiang, Jilin, and Liaoning Provinces in the northeast region and the four eastern leagues of the Inner Mongolia Autonomous Region were taken as the study area, and arable land zoning in the northeast black soil region was explored through group analysis. Ten types of indicators were selected according to the four levels of climate, soil, vegetation, and topography of the northeast black soil region, including average precipitation and average temperature for many years at the climate level, organic matter content and soil texture (including clay, silt, and sand) at the soil level, NDVI and EVI indicators at the vegetation level, and DEM and slope indicators at the topographic level. In accordance with the principle of distinguishing differences and summarizing commonalities, nine scenarios of dividing the northeast black soil zones into 2 regions to 10 regions were explored, and these nine zoning scenarios were evaluated in terms of zoning. The results showed that (1) the spatial variability of cropland zoning in the northeast black soil zone based on four indicators, namely climate, soil, vegetation, and topography, was significant; (2) the results of the nine types of zoning based on cropland in the northeast black soil zone showed that intra-zonal zoning was optimal when zoning the northeast black soil zone into six types of zones, which enhanced the variability between the zones and the consistency within the zones; and (3) the assessment of large-scale cropland zoning using the pseudo F-statistic and area-weighted standard deviation methods revealed similarities in their outcomes. The results provide a scientific basis for the subregional protection of arable land in the black soil zone and help to formulate effective policies for different regions.

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Section: Zoning Of Cropland Management Types In the Northeastern Blac...mentioning

confidence: 99%