A global compendium of human Crimean-Congo haemorrhagic fever virus occurrence

Each of the 2,220 rows represents a single occurrence record (one or more CCHF cases in the same unique location within a single calendar year). The fields contained in the database are as follows: OCCURRENCE_ID: Unique identifier for each occurrence in the database after temporal and locational standardisation.LOCATION_TYPE: Whether the record represents a point or a polygon location.ADMIN_LEVEL: The administrative level which the record represents when the location type is a polygon. Values are 1 (state or province), 2 (district) and -999 when the location type is a point.GAUL_AD1: The first-level GAUL code which identifies the Admin-1 level occurrences as well as the Admin-1 polygon within which any smaller polygons and points lie.GAUL_AD2: The second-level GAUL code which identifies the Admin-2 level occurrences as well as the Admin-2 polygon within which any points lie. Values of -999 are assigned when the polygon was Admin-1 level.UNIQUE_LOCATION: A unique identifier created for all locations (both points and polygons) based upon the unique point locations (in same 5km x 5km pixels) and the GAUL codes.X: The longitudinal coordinate of the point or polygon centroid (WGS1984 Datum).Y: The latitudinal coordinate of the point or polygon centroid (WGS1984 Datum).YEAR: The year of the occurrence. 10. COUNTRY: The name of the country within which the occurrence lies. 11. REGION: The region within which the occurrence lies – values are Asia, Europe, and Africa (includes the Arabian peninsula).

本数据集共包含2220条记录，每一行均代表单次暴发记录——即单个日历年度内，同一唯一地点出现的1例或多例克里米亚-刚果出血热（Crimean-Congo Hemorrhagic Fever，CCHF）病例。
数据库包含的字段如下：
1. 暴发唯一标识符（OCCURRENCE_ID）：经过时空标准化处理后，本数据库中每条暴发记录的唯一识别码。
2. 地理位置类型（LOCATION_TYPE）：标识该记录代表的是点位还是多边形区域。
3. 行政层级（ADMIN_LEVEL）：当记录的地理位置类型为多边形时，该记录所对应的行政层级。取值为1（国家/州/省）、2（区县）；若地理位置类型为点位，则取值为-999。
4. 一级GAUL编码（GAUL_AD1）：用于识别一级行政区域（Admin-1）暴发记录，同时标识容纳所有下级多边形与点位的一级行政区域多边形。
5. 二级GAUL编码（GAUL_AD2）：用于识别二级行政区域（Admin-2）暴发记录，同时标识容纳所有点位的二级行政区域多边形。若多边形为一级行政区域层级，则取值为-999。
6. 唯一地点标识符（UNIQUE_LOCATION）：基于唯一点位坐标（落入相同5km×5km像素范围）与GAUL编码生成的、适用于所有点位与多边形区域的唯一标识符。
7. X坐标：点位或多边形质心的经度坐标，采用WGS1984大地基准面。
8. Y坐标：点位或多边形质心的纬度坐标，采用WGS1984大地基准面。
9. 发生年份：暴发事件发生的年度。
10. 所属国家：暴发事件发生所在的国家名称。
11. 所属区域：暴发事件发生所在的区域，取值为亚洲、欧洲与非洲（含阿拉伯半岛）。