Journal of Geo-information Science >
Delimitation of Land Disputed Area by Neighborhood Expansion Method
Received date: 2017-04-26
Request revised date: 2017-07-11
Online published: 2017-10-20
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Now, there are still many land border territory disputes causing local wars or unstableness between countries. Under the current international situation, negotiation is the most effective method of solving territory disputes and it needs lots of demarcation technology. Current demarcation methods cannot fully safeguard unilateral resource interest and it costs lots of time. Thus, we proposed a new solution using neighborhood expansion method (NEM). Firstly, the disputed area was split using hexagon where related information such as resource reserve was mapped, and benefit density (BD), which is the comprehensive evaluation value of related resources in each grid, was calculated and disposed. Secondly, the disputed area was initially divided using NEM under the guide of regional integrity, BD and bilateral agreed area ratio, where most hexagons with higher BD were assigned to the related country. Thirdly, the single-source optimal path algorithm based on hexagon was improved to solve the optimal path from non-enclave to enclave caused during the initial segmentation of disputed area. The ascriptions of all the enclaves were determined once again based on some rules. Finally, the integrity of unilateral region was optimized, the gap between the unilateral area and the agreed area was reduced to the extent smaller than the area of single complete grid using NEM. The disputed zone was split accurately according to the agreed area ratio. Tests were made to compare our method with the other one using genetic algorithm based on simulated data, different hexagon sizes and agreed area ratios. The results indicated that our method owns the following characteristics: (1) it can correctly assign bilateral agreed never-lost regions and impenetrable areas like ethnic settlements; (2) the disputed area can be divided fast and precisely according to agreed area ratio; (3) it can fully safeguard unilateral resource interest. These features indicate that our method is effective and reliable and it can provide important reference and guide for one-side delimitation.
FENG Changqiang , HUA Yixin , ZHANG Xiaonan , CAO Yibing , WU Lili , CUI Huping . Delimitation of Land Disputed Area by Neighborhood Expansion Method[J]. Journal of Geo-information Science, 2017 , 19(10) : 1306 -1314 . DOI: 10.3724/SP.J.1047.2017.01306
Fig. 1 Three types of regular grids and their adjacent grids图1 3种规则格网及其邻接格网示意图 |
Fig. 2 Distribution of benefit density in disputed area图2 争议区利益密度分布 |
Fig. 3 Narrow area with single-grid width图3 单格网宽度狭长区域示意图 |
Fig. 4 Initial division of disputed area and optimal path from enclave to its country图4 争议区初始分割及飞地通路寻优结果 |
Fig. 5 Searching optimal paths from one-side enclaves to its country图5 甲方飞地通路寻优流程 |
Fig. 6 Accurate segmentation of grids图6 格网精确分割示意图 |
Tab. 1 Weight of resource importance表1 资源重要性权值 |
类别 | 水资源 | 石油 | 天然气 | 稀有金属 |
---|---|---|---|---|
权值 | 0.1053 | 0.3628 | 0.2446 | 0.2873 |
Tab. 2 Comparison between results of two methods表2 2种方法结果对比 |
格网尺寸/km | 甲乙约定面积比例 | 遗传诱导法 | 本文方法 | |||||
---|---|---|---|---|---|---|---|---|
甲乙实际所 得面积比例 | 甲乙实际所得利益比例 | 耗时/s | 甲乙实际所得面积比例 | 甲乙实际所得利益比例 | 耗时/s | |||
2 | 1:2 | 1.09:2 | 1.21:2 | 33 | 1:2 | 1.92:2 | 7 | |
1:1 | 1.05:1 | 1.31:1 | 27 | 1:1 | 2.31:1 | 6 | ||
2:1 | 2.05:1 | 2.88:1 | 29 | 2:1 | 5.17:1 | 8 | ||
3 | 1:2 | 1.06:2 | 1.13:2 | 16 | 1:2 | 1.90:2 | 5 | |
1:1 | 1.03:1 | 1.27:1 | 14 | 1:1 | 2.30:1 | 4 | ||
2:1 | 2.04:1 | 2.57:1 | 17 | 2:1 | 5.08:1 | 5 | ||
4 | 1:2 | 1.07:2 | 1.05:2 | 9 | 1:2 | 1.83:2 | 4 | |
1:1 | 1.06:1 | 1.10:1 | 8 | 1:1 | 2.15:1 | 3 | ||
2:1 | 2.04:1 | 2.18:1 | 6 | 2:1 | 4.53:1 | 3 |
Fig. 7 Experiment results图7 实验结果 |
The authors have declared that no competing interests exist.
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