Near real time flood inundation mapping using social media data as an information source: a case study of 2015 Chennai flood

Geoenvironmental Disasters

Table 1 Comparison of field data and derived data from social media (Water heights)

Id	Latitude	Longitude	Water height in meter
Id	Latitude	Longitude	Field data (actual)	Social media data
1	13.01913	80.178095	3.51	3.35
2	13.024089	80.240774	3.20	2.97
3	12.973916	80.228116	1.37	1.22
4	13.027433	80.208179	3.66	3.58
5	12.875667	80.226843	1.83	1.59
6	12.980011	80.234378	0.76	1.19
7	13.037385	80.244238	1.68	1.37
8	12.904028	80.229995	0.61	1.35
9	13.047948	80.177572	0.30	0.44
10	13.028559	80.225438	3.05	3.10
11	13.056767	80.251894	0.30	0.29
12	13.02217	80.206351	1.67	2.20