Research Trend Analysis of Geospatial Information in South Korea Using Text-Mining Technology

Table 5

Results of network analysis (1996–2015). Italic cells represent the domains in which all network indices are within the top 10 in each period.

Rank	Frequency		Degree		Closeness centrality		Betweenness centrality
1	LANDSAT	87	LANDSAT	9	LANDSAT	0.032	LANDSAT	140.804
2	Climate	51	Natural Disaster	8	KOMPSAT	0.029	Natural Disaster	136.670
3	KOMPSAT	35	KOMPSAT	7	Natural Disaster	0.028	Climate	86.810
4	Natural Disaster	29	Climate	6	Climate	0.025	KOMPSAT	72.887
5	Forest	19	Forest	5	MODIS	0.024	Forest	43.886
6	MODIS	19	MODIS	5	Forest	0.024	Agriculture	38.758
7	Water Resource	18	Soil	3	Soil	0.022	MODIS	30.487
8	Urban	17	Biodiversity	3	Biodiversity	0.022	GEOKOMPSAT	15.540
9	Ocean	12	Agriculture	3	Agriculture	0.022	Water Resource	8.645
10	GEOKOMPSAT	12	GEOKOMPSAT	3	GEOKOMPSAT	0.021	SPOT	4.032