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As the Web provide a more flexible and sophisticated platform for information dissemination and exchanging, the idea that allow user to add and upload geospatial-related data in GIS-enabled online site to promote the geographic information sharing in public is becoming a new research topic in GIS. There are some real-world Web sites already partially implement VGI thought like wikimapia.org and openstreetmap...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.